QUANTUM CORP /DE/
10-Q, 1997-08-13
COMPUTER STORAGE DEVICES
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                                    Form 10-Q

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

           [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended June 29, 1997

                                       OR

          [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

             For the transition period from __________to___________

                              --------------------

                         Commission File Number 0-12390

                               QUANTUM CORPORATION

           Incorporated Pursuant to the Laws of the State of Delaware

                              --------------------

                  IRS Employer Identification Number 94-2665054

                 500 McCarthy Blvd., Milpitas, California 95035

                                 (408) 894-4000

                              --------------------

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by  Section  13 or 15(d)  of the  Securities  Exchange  Act of 1934,
during the preceding 12 months (or for such shorter  period that the  registrant
was  required  to file such  reports),  and (2) has been  subject to such filing
requirements for the past 90 days.

       Yes   X   No
           ----     ----

Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of June 29, 1997: 132,226,790

<PAGE>

                               QUANTUM CORPORATION

                                   10-Q REPORT

                                      INDEX
                                                                           Page
                                                                          Number
                                                                          ------

PART I - FINANCIAL INFORMATION

              Item 1.  Financial Statements

                       Condensed Consolidated Statements of Operations        3

                       Condensed Consolidated Balance Sheets                  4

                       Condensed Consolidated Statements of Cash Flows        5

                       Notes to Condensed Consolidated Financial Statements   6


              Item 2.  Management's Discussion and Analysis of
                       Financial Condition and Results of Operations         10


PART II - OTHER INFORMATION                                                  23


SIGNATURE                                                                    24


                                                                               2
<PAGE>

                               QUANTUM CORPORATION

                         PART I - FINANCIAL INFORMATION

Item 1.  Financial Statements

                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                      (In thousands except per share data)
                                   (unaudited)

                                                         Three Months Ended
                                                     June 29,         June 30,
                                                      1997              1996
                                                   -----------       -----------

Sales                                              $ 1,446,144       $ 1,153,502
Cost of sales                                        1,170,210         1,012,223
                                                   -----------       -----------

   Gross profit                                        275,934           141,279

Operating expenses:
   Research and development                             74,029            66,665
   Sales and marketing                                  41,732            36,195
   General and administrative                           27,473            21,487
                                                   -----------       -----------
                                                       143,234           124,347

   Income from operations                              132,700            16,932

Other (income) expense:
   Interest expense                                      6,035            11,032
   Interest and other income, net                       (3,759)              707
                                                   -----------       -----------
                                                         2,276            11,739

Income before income taxes                             130,424             5,193
Income tax provision                                    33,910             1,350
                                                   -----------       -----------

Net income                                         $    96,514       $     3,843
                                                   ===========       ===========

Net income per share:
   Primary                                         $      0.69       $      0.03
   Fully diluted                                   $      0.61       $      0.03

Weighted average common and common
   equivalent shares:
      Primary                                          140,881           115,692
      Fully diluted                                    162,511           115,692


See accompanying notes to condensed consolidated financial statements 

                                                                               3
<PAGE>

                               QUANTUM CORPORATION

                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (In thousands)
                                                         June 29,      March 31,
                                                          1997           1997
                                                       -----------   -----------
                                                       (unaudited)     (Note 1)

Assets
Current assets:
   Cash and cash equivalents                            $  365,973    $  345,125
   Accounts receivable, net of allowance for
      doubtful accounts of $10,539 and $10,610             887,389       887,477
   Inventories                                             295,251       252,802
   Deferred taxes                                          122,899       122,899
   Other current assets                                     49,105        80,116
                                                        ----------    ----------
Total current assets                                     1,720,617     1,688,419

Property and equipment, net of accumulated
   depreciation of $177,957 and $226,691                   231,845       407,206
Purchased intangibles, net                                   8,945        42,131
Investment in joint venture                                134,944          --
Other assets                                                17,079        20,507
                                                        ----------    ----------
                                                        $2,113,430    $2,158,263
                                                        ==========    ==========

Liabilities and Shareholders' Equity
Current liabilities:
   Accounts payable                                     $  472,354    $  502,069
   Accrued warranty expense                                 97,651        94,989
   Accrued compensation                                     56,340        63,093
   Income taxes payable                                     47,091        31,153
   Current portion of long-term debt                           872        44,229
   Other accrued liabilities                               123,124        80,045
                                                        ----------    ----------
Total current liabilities                                  797,432       815,578

Deferred taxes                                              34,264        33,587
Convertible subordinated debt                              241,350       241,350
Long-term debt                                              40,694       177,668

Redeemable preferred stock                                   3,888         3,888

Shareholders' equity:
   Common stock                                            472,896       459,800
   Retained earnings                                       522,906       426,392
                                                        ----------    ----------
Total shareholders' equity                                 995,802       886,192
                                                        ----------    ----------
                                                        $2,113,430    $2,158,263
                                                        ==========    ==========

See accompanying notes to condensed consolidated financial statements.

                                                                               4
<PAGE>

<TABLE>

                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (In thousands)
                                   (unaudited)
<CAPTION>

                                                                          Three Months Ended
                                                                         June 29,     June 30,
                                                                           1997         1996
                                                                         ---------    ---------
<S>                                                                      <C>          <C>      
  Cash flows from operating activities:
     Net income                                                          $  96,514    $   3,843
     Items not requiring the current use of cash:
        Depreciation                                                        21,094       21,423
        Amortization                                                         3,802        6,731
        Deferred  income taxes                                                 677         --
        Compensation related to stock plans                                    669          365
     Changes in assets and liabilities:
        Accounts receivable                                                     93      (19,114)
        Inventories                                                        (42,449)      10,017
        Accounts payable                                                   (29,715)     (33,252)
        Income taxes payable                                                15,938          (87)
        Accrued warranty expense                                             2,662      (13,948)
        Other assets and liabilities                                        42,323      (61,367)
                                                                         ---------    ---------
  Net cash provided by (used in) operating activities                      111,608      (85,389)
                                                                         ---------    ---------

  Cash flows from investing activities:
     Investment in property and equipment                                  (33,282)     (43,980)
     Proceeds from disposition of property and equipment                     4,176         --
     Proceeds from repayment of note receivable                             18,000         --
     Proceeds from sale of interest in recording heads operations           94,000         --
                                                                         ---------    ---------
  Net cash provided by (used in) investing activities                       82,894      (43,980)
                                                                         ---------    ---------

  Cash flows from financing activities:
     Proceeds from long-term credit facilities                                --        125,000
     Principal payments on credit facilities                              (180,331)     (31,349)
     Proceeds from issuance of common stock                                  6,677       11,002
                                                                         ---------    ---------
  Net cash provided by (used in)  financing activities                    (173,654)     104,653
                                                                         ---------    ---------

  Net increase (decrease) in cash and cash equivalents                      20,848      (24,716)
  Cash and cash equivalents at beginning of period                         345,125      164,752
                                                                         ---------    ---------
  Cash and cash equivalents at end of period                             $ 365,973    $ 140,036
                                                                         =========    =========

  Supplemental disclosure of cash flow information:
     Conversion of debentures                                                 --      $  35,583
     Cash paid during the period for:
        Interest                                                         $   3,433    $   9,611
        Income Taxes                                                     $     637    $   1,494
<FN>

See accompanying notes to condensed consolidated financial statements 
</FN>
</TABLE>
                                                                               5
<PAGE>

                               QUANTUM CORPORATION

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)


1.   Basis of presentation

The accompanying  unaudited condensed  consolidated financial statements reflect
all adjustments,  consisting only of normal recurring  adjustments which, in the
opinion of management,  are necessary for a fair presentation of the results for
the  periods  shown.  The  results  of  operations  for  such  periods  are  not
necessarily indicative of the results expected for the full fiscal year. Certain
prior period amounts have been  reclassified to conform to the current  period's
presentation.  The condensed consolidated balance sheet as of March 31, 1997 has
been derived  from the audited  financial  statements  at that date but does not
include all of the  information  and  footnotes  required by generally  accepted
accounting  principles  for  complete  financial  statements.  The  accompanying
financial  statements  should be read in conjunction with the audited  financial
statements of Quantum Corporation for the fiscal year ended March 31, 1997.


2.   Inventories

   Inventories consisted of the following:
      (In thousands)
                                                      June 29,   March 31,
                                                        1997       1997
                                                      --------   --------

Materials and purchased parts                         $ 41,720   $ 39,898
Work in process                                         17,249     48,005
Finished goods                                         236,282    164,899
                                                      --------   --------
                                                      $295,251   $252,802
                                                      ========   ========


3.   Net income per share


Net income per share amounts are computed by dividing  income or loss amounts by
the weighted  average of common and common  equivalent  shares  (when  dilutive)
outstanding during the period. Primary net income per share computations for the
three month periods ended June 29, 1997 and June 30, 1996 were computed based on
weighted  average shares  outstanding,  including the dilutive  impact of common
stock  equivalents,  which consist of outstanding stock options.  Net income per
share  computed on a fully  diluted basis for the three month periods ended June
29, 1997 and June 30,  1996  assumes  conversion  of the  Company's  outstanding
convertible  subordinated  debentures  as of the  beginning  of  the  respective
periods. Net income per share reflects the effect of the two-for-one stock split
effected as a stock dividend in June 1997.

                                                                               6
<PAGE>

In February 1997, the Financial  Accounting Standards Board issued Statement No.
128,  "Earnings  per Share,"  which is  required to be adopted in the  Company's
fiscal  quarter  ending  December  31, 1997.  At that time,  the Company will be
required to change the method  currently used to compute  earnings per share and
to restate all prior periods.  Under the new requirements,  primary earnings per
share is replaced by basic earnings per share,  for which the dilutive effect of
stock options will be excluded.  Under  Statement  128, basic earnings per share
will exceed  previously  computed primary earnings per share in periods with net
income. The impact of Statement 128 on the calculation of fully diluted earnings
per share is not expected to be material.

4.   Debt & Capital

The previously outstanding revolving credit line, term loan, and equipment loan,
which had carrying amounts of $110 million,  $56 million, and $14 million, as of
March 31, 1997,  respectively,  were repaid and  terminated  in the first fiscal
1998 quarter.

In June 1997, the Company entered into an unsecured senior credit facility which
provides a $500 million  revolving  credit line and expires in June 2000. At the
option of the Company,  borrowings under the revolving credit line bear interest
at either LIBOR plus a margin determined by a total funded debt ratio, or a base
rate, with option periods of one to six months.  As of June 29, 1997,  there was
no outstanding balance drawn on this line.

The Company has filed a registration statement pursuant to which the Company may
issue debt or equity securities, in one or more series or issuances,  limited to
$450 million  aggregate  public  offering price or its equivalent in one or more
foreign currencies,  currency units or composite currencies as may be designated
by the Company.  Debt securities which may be offered under the registration may
be either senior or  subordinated,  and the specific terms would be set pursuant
to a specific  offering.  The number of shares of Common stock,  par value $0.01
per share,  which may be issued under the  registration,  as well as the initial
public  offering  price or method of  determining  the initial  public  offering
price, would be set pursuant to a specific offering.  The registration statement
became  effective on July 24,  1997.  For a  description  of  securities  issued
pursuant  to the  registration  statement,  refer  to  Note 7 of  the  Notes  to
Condensed Consolidated Financial Statements.



                                                                               7
<PAGE>

5.  Litigation

The Company and certain of its current and former  officers and  directors  have
been named as defendants in two class action  lawsuits,  one filed on August 28,
1996 in the Superior Court of Santa Clara County,  California,  and one filed on
August  30,  1996 in the  U.S.  District  Court  for the  Northern  District  of
California. The plaintiff in both class actions purports to represent a class of
all persons who purchased the Company's  common stock between  February 26, 1996
and June 13, 1996. The complaints  allege that the defendants  violated  various
federal   securities   laws  and  California   statutes  by  concealing   and/or
misrepresenting   material  adverse  information  about  the  Company  and  that
individual  defendants  sold shares of the  Company's  stock based upon material
nonpublic information.

On February 25,  1997,  in the Santa Clara County  action,  the Court  sustained
defendants'  demurrer  to most of the  causes of action in the  complaint,  with
leave to amend.  At a June 12, 1997 demurrer  hearing in state court,  the judge
dismissed the action as to four of the individual  defendants with prejudice and
as to three of the individual  defendants without prejudice.  The demurrer as to
the Company was overruled.  Defendants'  motion that the action not be permitted
to proceed as a class  action was denied  without  prejudice  and the hearing on
class certification has been continued for ninety days.

Defendants  filed their  motion to dismiss the  federal  complaint  on April 16,
1997.  Oral argument was heard on July 30, 1997.  Following oral  argument,  the
Court granted defendants' motion to dismiss.  The Court did not indicate whether
dismissal would be with or without prejudice. To date, no formal ruling has been
issued by the Court.

Certain of the Company's  current and former  officers and  directors  were also
named as defendants in a derivative lawsuit, which was filed on November 8, 1996
in the Superior Court of Santa Clara County. The derivative  complaint was based
on  factual  allegations  substantially  similar  to those  alleged in the class
action lawsuits.  Defendants' demurrer to the derivative complaint was sustained
without  prejudice  on  April  14,  1997.  Plaintiffs  did not  file an  amended
complaint. On August 7, 1997, the Court issued an order of dismissal and entered
final judgment dismissing the complaint.

6.  MKE/Quantum Joint Venture

On May 16, 1997, the Company sold a controlling  interest in its recording heads
operations  (RHO) to MKE. RHO designs,  develops,  and manufactures MR recording
heads used in the Company's disk drive products.  The sale was achieved  through
MKE  acquiring a 51% interest in a new joint  venture  (JV) entity,  MKE-Quantum
Components  LLC,  that was formed to hold the  operations,  assets,  and certain
liabilities of RHO.

Pursuant to the terms of the transaction, Quantum contributed certain RHO assets
and  operations  and  leased  certain  premises  to the JV  and  retained  a 49%
ownership  interest  in the JV; the JV assumed  $51  million of debt  payable to
Quantum; and MKE paid Quantum $94 million and contributed $110 million to the JV
in exchange for a 51% controlling ownership interest in the JV.

                                                                               8
<PAGE>

The RHO assets which Quantum  contributed  to the JV are primarily  comprised of
inventory,  equipment,  accounts receivable,  and intangibles,  which aggregated
approximately $210 million and the third party liabilities totaled approximately
$32 million. In addition,  the JV will lease certain premises from Quantum,  and
RHO employees will become  employees of the JV. One of these leases results,  in
substance,  in a transfer of premises with an approximate  carrying value of $48
million to the JV.

MKE and the Company will share pro rata in the capital funding requirements,  if
any,  and  results of  operations  of the JV. The  Company  plans to continue to
utilize the recording  heads  manufactured  by the JV in its disk drive products
manufactured by MKE.

Effective May 16, 1997, the Company began to account for its 49% interest in the
JV using the equity method of accounting.  The Company's  equity interest in the
operating results of the JV were reported in interest and other income, net. The
results of RHO through May 15, 1997 were consolidated.

Unaudited Pro Forma Information

Giving effect to the above-noted sale transaction as if it had occurred on April
1, 1996,  the pro forma effect on the  Company's  consolidated  balance sheet at
March 31, 1997,  would not have been  significant,  and net income for the three
month  period ended June 29, 1997 would have been  approximately  $99 million or
$0.62 per share, fully diluted compared to $10 million or $0.09 per share, fully
diluted for the three month period ended June 30, 1996. This unaudited pro forma
information  is intended for  information  purposes only and is not  necessarily
indicative  of the future  results of operations of the JV or the results of the
Company that would have occurred had the JV  arrangement  been in effect for the
full fiscal quarter presented.


7.    Subsequent Event

In July 1997,  the Company  issued $288 million of 7%  convertible  subordinated
notes.  The notes mature on August 1, 2004, and are convertible at the option of
the holder at any time  prior to  maturity,  unless  previously  redeemed,  into
shares of the Company's common stock at a conversion price of $46.325 per share.
The notes are redeemable at the Company's  option on or after August 1, 1999 and
prior to August 1, 2001,  under certain  conditions  related to the price of the
Company's  common  stock.  In the  event of  certain  changes  involving  all or
substantially  all of  the  Company's  common  stock,  the  notes  would  become
redeemable at the option of the holder. Redemption prices range from 107% of the
principal to 100% at maturity. The notes are unsecured obligations  subordinated
in right of  payment  to all  existing  and future  senior  indebtedness  of the
Company.

                                                                               9
<PAGE>

Item 2. Management's  Discussion and Analysis of Financial Condition and Results
        of Operations

Management's discussion and analysis includes:

o        Business overview.

o        Strategic developments.

o        A comparison  of Quantum's  results of  operations in the quarter ended
         June 29, 1997 with the results in the quarter ended June 30, 1996.

o        A discussion of Quantum's operating liquidity and capital resources.

o        A discussion of trends and  uncertainties,  which include those related
         to the information  storage industry and those related to more specific
         characteristics of Quantum.

This report contains  forward-looking  statements  within the meaning of Section
27A of the Securities Act of 1933, as amended, and Section 21E of the Securities
Exchange Act of 1934, as amended. Forward-looking statements usually contain the
words   "estimate,"   "anticipate,"   "expect"  or  similar   expressions.   All
forward-looking statements are inherently uncertain as they are based on various
expectations  and assumptions  concerning  future events and they are subject to
numerous known and unknown risks and uncertainties.  These  uncertainties  could
cause actual  results to differ  materially  from those expected for the reasons
set forth below under Trends and  Uncertainties.  Readers are  cautioned  not to
place undue reliance on these forward-looking statements, which speak only as of
the date hereof.


Business Overview

Quantum Corporation ("Quantum" or the "Company"), operating in a single business
segment, designs, develops, and markets information storage products,  including
high-performance,  high-quality  hard  disk  drives,  half-inch  cartridge  tape
drives, tape drive related products,  and solid state disk drives. The half-inch
cartridge  tape  drives and solid  state disk  drives  are  manufactured  by the
Company.  The Company  combines its  engineering  and design  expertise with the
high-volume  manufacturing  capabilities of its exclusive manufacturing partner,
Matsushita-Kotobuki  Electronics Industries, Ltd. ("MKE") of Japan, a subsidiary
of Matsushita Electric  Industrial Co., Ltd., to produce  high-quality hard disk
drives.  Quantum is also involved in the manufacture of magnetoresistive  ("MR")
recording heads that are used in hard disk drives produced for the Company.

The Company's strategy is to offer a diversified product portfolio that features
leading-edge  technology  and  high-quality  manufacturing  for a broad range of
market  applications.  Inherent  in this  strategy  is a focus  on  meeting  and
anticipating  customers'  information  storage  needs  and on the  research  and
development of storage product technology.

                                                                              10
<PAGE>

The  Company  markets  its  products   worldwide  to  major  original  equipment
manufacturers  ("OEMs"), a broad range of distributors,  resellers,  and systems
integrators.

The Company's information storage business currently includes the following four
components:

         Desktop and Portable Storage Products.  Quantum designs,  develops, and
         markets hard disk drives  designed to meet the storage needs of desktop
         systems.  These  products  are  designed  for  entry-level  to high-end
         desktop  personal  computers  ("PCs") for use in both home and business
         environments.

         Workstation and Systems Storage  Products.  Quantum designs,  develops,
         and markets technologically advanced hard disk drives for the demanding
         storage needs of network  servers,  workstations,  storage  subsystems,
         high-end  desktop  systems,  and  minicomputers.   These  products  are
         designed for  storage-intensive  applications,  such as graphics,  disk
         arrays,  desktop publishing systems,  multimedia computing systems, and
         networked data bases and file servers.

         Specialty Storage Products.  Quantum designs,  develops,  manufactures,
         and  markets  half-inch  cartridge  tape  drives  and solid  state disk
         drives. The tape drives use advanced linear recording  technology and a
         highly  accurate tape guide system to perform data backup for mid-range
         and  high-end  computer  systems.  The solid state disk drives have the
         high  execution  speeds  required  for  applications  such as  imaging,
         multimedia,  video-on-demand,  on-line transaction processing, material
         requirements planning, and scientific modeling.

         Recording Heads.  Quantum is involved in the design,  development,  and
         manufacture of MR recording heads used in the Company's  products.  The
         Company believes that MR technology, which provides higher capacity per
         disk than conventional thin-film heads, will replace thin-film heads as
         the leading  recording head technology.  The Company does not currently
         market  thin-film  or MR heads to other  companies.  Effective  May 16,
         1997,  the  Company's  involvement  in  the  design,  development,  and
         manufacture of recording heads is through a 49% ownership interest in a
         joint  venture  with MKE as  discussed  in the  Strategic  Developments
         section.

Quantum operates in an industry characterized by rapid technological change. The
Company is currently concentrating its product development efforts on broadening
its existing disk and tape drive product lines through the  introduction  of new
products,  including new tape drives, new high-capacity hard disk drive products
to be manufactured by MKE, as well as new products targeted specifically for the
increasing storage needs of the desktop market. The Company is also focusing its
efforts on applying its MR technology to new generations of disk drives.

                                                                              11
<PAGE>

Strategic Developments

MKE/Quantum  Recording  Heads Joint  Venture.  On May 16, 1997,  MKE and Quantum
formed a recording  heads joint venture  company,  MKE-Quantum  Components  LLC.
Pursuant to the terms of the transaction,  Quantum contributed certain recording
heads assets and  operations,  transfered  employees of the Company's  recording
heads operations and leased certain premises to the joint venture and retained a
49%  ownership  interest in the joint  venture;  the joint  venture  assumed $51
million  of debt  payable to  Quantum;  and MKE paid  Quantum  $94  million  and
contributed  $110 million to the joint venture in exchange for a 51% controlling
ownership  interest in the joint venture.  The joint venture combines  Quantum's
engineering and design expertise with MKE's manufacturing expertise.

Renegotiated MKE Master Agreement.  In May 1997, Quantum completed renegotiation
of its master agreement with MKE, which covers the general terms of the business
relationship. The agreement was extended for a period of 10 years, unless sooner
terminated as a result of certain specified events including a change-in-control
of either Quantum or MKE. MKE currently manufactures all of the hard disk drives
developed and marketed by Quantum.  Quantum's relationship with MKE, which dates
from 1984,  is built on Quantum's  engineering  and design  expertise  and MKE's
high-volume, high-quality manufacturing expertise.


Results of Operations

Sales. Sales in the quarter ended June 29, 1997, were $1,446 million compared to
$1,154  million in the quarter  ended June 30, 1996.  The increase  reflected an
increase in  shipments  of tape  drives,  tape  drive-related  products and disk
drives,  as well as an increase in the average drive price.  The increase in the
average  drive price  reflected a change in sales mix to a higher  proportion of
high capacity  drives and tape drives,  which generally have a higher unit price
than the  desktop  products  and a shift in sales  to  higher  capacity  desktop
drives.  The  increase  in sales  also  reflects  the  impact of the  successful
completion of the transition of the manufacturing of high-end disk drives to MKE
during fiscal 1997 which  depressed sales in the quarter ended June 30, 1996. As
part of the transition,  older high-end disk drive products ceased production in
July 1996, and new high-end  drives  manufactured  by MKE did not ramp until the
third and fourth quarters of fiscal 1997.

Sales of desktop  hard  drives  represented  67% of total  sales for the quarter
ended June 29, 1997,  and the company  anticipates  that desktop  products  will
continue to constitute a majority of sales in the future.  However,  the company
also  expects that sales of DLT product,  which  represented  18% of sales and a
much higher  percentage  operating  profits for the quarter ended June 29, 1997,
will  continue to  increase as a  percentage  of the  Company's  total sales and
operating profits in the future.  The summer months of the second fiscal quarter
for hard disk drives are  expected to continue  the  historical  pattern of soft
demand.  However,  an expected  continuation  of growth in the tape  business is
anticipated  to  partially  offset  this  pattern,  and  accordingly,  sales are
expected to be relatively flat compared to the first fiscal 1998 quarter.

Sales to the Company's top five customers were 46% of sales in the quarter ended
June 29, 1997,  compared  with 42% of sales in the quarter  ended June 30, 1996.
Sales to  Hewlett-Packard  were

                                                                              12
<PAGE>

$174 million, or 12% of sales, in the quarter ended June 29, 1997, and were less
than 10% of sales in the quarter ended June 30, 1996. Sales to Digital Equipment
Corporation  were $162 million,  or 11% of sales,  in the quarter ended June 29,
1997, and were less than 10% of sales in the quarter ended June 30, 1996.  Sales
to Compaq Computer,  Inc. were less than 10% in the quarter ended June 29, 1997,
compared with $121 million, or 10% of sales, in the quarter ended June 30, 1996.


Gross Margin Rate.  The gross margin rate  increased  6.9  percentage  points to
19.1% in the quarter  ended June 29, 1997,  from 12.2% in the quarter ended June
30, 1996.  The  increase  reflected a higher  proportion  of tape drive and tape
drive related product sales in the quarter ended June 29, 1997,  compared to the
quarter  ended June 30, 1996, as these  products  achieved a higher gross margin
rate than sales of hard disk drive  products of the  Company.  The gross  margin
increase also reflected a stronger product mix and pricing in the desktop market
in the quarter ended June 29, 1997, compared to the quarter ended June 30, 1996.
In addition,  the increase  reflected the introduction and market  acceptance of
the new high end products;  high-end  margins in the quarter ended June 30, 1996
had  been  largely   eroded  during  the   transition  of  high-end  disk  drive
manufacturing to MKE.

For the second fiscal 1998 quarter,  the Company expects to experience continued
gross margin  pressure  with respect to both its desktop and high-end  hard disk
drive products. However, an expected continuation of growth in the tape business
is  anticipated  to partially  offset this impact,  and  accordingly,  the gross
margin rate is expected to be relatively  flat compared to the first fiscal 1998
quarter.


Research and  Development  Expenses.  In the quarter  ended June 29,  1997,  the
Company's  investment in research and  development  was $74 million,  or 5.1% of
sales,  compared to $67 million, or 5.8% of sales, in the quarter ended June 30,
1996. The decrease in research and development  expense as a percentage of sales
reflects the timing of certain pre-production activity which varies from quarter
to quarter.  For the second fiscal 1998 quarter,  the Company expects  increased
expenditures  associated  with  pre-production  activity  for  hard  disk  drive
products in  development.  The decrease also reflects the impact of applying the
equity method of accounting to the Company's  involvement in the recording heads
operations,  effective May 16, 1997. Reflecting  management's continued focus on
the development and timely  introduction of new information storage products and
technologies,  as a percentage of sales,  research and development  expenses for
the remainder of fiscal 1998 are expected to increase over the level achieved in
the first fiscal 1998 quarter.


Sales and Marketing Expenses.  Sales and marketing expenses in the quarter ended
June 29, 1997 were $42 million, or 2.9% of sales,  compared with $36 million, or
3.1% of sales,  in the quarter  ended June 30,  1996.  The increase in sales and
marketing  expenses was related to the costs of supporting the Company's  higher
volume of sales. As a percentage of sales,  sales and marketing expenses for the
second fiscal 1998 quarter are expected to increase  slightly  compared with the
level achieved in the first fiscal 1998 quarter.

                                                                              13
<PAGE>

General and Administrative Expenses.  General and administrative expenses in the
quarter ended June 29, 1997, were $27 million, or 1.9% of sales, compared to $21
million,  or 1.9% of sales,  in the quarter ended June 30, 1996. The increase in
general  and  administrative  expenses  reflected  expansion  of  the  Company's
infrastructure.  As  compared  to the first  fiscal  1998  quarter,  general and
administrative expenses are expected to be relatively flat for the second fiscal
quarter.


Interest and Other Income/Expense. Net interest and other income and expense was
$2 million net expense in the quarter  ended June 29, 1997,  and $12 million net
expense in the quarter ended June 30, 1996. The decline in net expense  reflects
a decrease in the average  amount of debt  outstanding  during the quarter ended
June 29, 1997,  compared to the quarter ended June 30, 1996,  and an increase in
interest income reflecting higher average cash balances during the quarter ended
June 29, 1997.


Income Taxes.  The effective tax rate in the quarter ended June 29, 1997, at 26%
was flat compared to the rate in the quarter ended June 30, 1996.


Liquidity and Capital Resources

At June 29,  1997,  the Company had $366  million in cash and cash  equivalents,
compared to $345  million at March 31,  1997.  For the three month  period ended
June 29, 1997,  cash was provided by operating  activities,  primarily  from net
income,  and from investing  activities.  Cash provided by investing  activities
included  a $94  million  payment  from  MKE as  part  of the  formation  of the
recording  heads joint venture  company and the repayment of a note  receivable,
partially  offset by  investment  in property  and  equipment.  Cash was used in
financing  activities  for the repayment of the  previously  outstanding  senior
credit  facility,  which  included a revolving  credit line and term loan, and a
term loan secured by specified capital equipment.

The revolving  credit line, term loan, and equipment  loan,  which were paid off
and  terminated  in the first fiscal 1998  quarter had carrying  amounts of $110
million, $56 million, and $14 million, as of March 31, 1997, respectively.

In June 1997, the Company entered into an unsecured senior credit facility which
provides a $500 million  revolving  credit line and expires in June 2000. At the
option of the Company, borrowings under the revolving credit line, bear interest
at either LIBOR plus a margin determined by a total funded debt ratio, or a base
rate, with option periods of one to six months.  As of June 29, 1997,  there was
no outstanding balance drawn on this line.

The Company has filed a registration statement pursuant to which the Company may
issue debt or equity securities, in one or more series or issuances,  limited to
$450 million  aggregate  public  offering price or its equivalent in one or more
foreign currencies,  currency units or composite currencies as may be designated
by the Company.  Debt securities which may be offered under the registration may
be either senior or  subordinated,  and the specific terms would be set pursuant
to a

                                                                              14
<PAGE>

specific  offering.  The number of shares of Common  stock,  par value $0.01 per
share, which may be issued under the registration, as well as the initial public
offering price or method of determining the initial public offering price, would
be set  pursuant  to a specific  offering.  The  registration  statement  became
effective on July 24, 1997.

The Company expects to spend  approximately  $200 million for capital equipment,
expansion of the  Company's  facilities,  and leasehold  improvements  in fiscal
1998. These capital  expenditures  will support the tape business,  research and
development, and general corporate operations. The Company believes that it will
be able to fund these capital  requirements.  Refer to the Future  Capital Needs
section of the Trends and  Uncertainties  section for  additional  discussion of
capital.

The  Company  believes  that  its  existing  and  available  capital  resources,
including  its  unsecured  senior credit  facility and any cash  generated  from
operations  will be sufficient to meet all currently  planned  expenditures  and
sustain  operations for the remainder of the fiscal year.  However,  this belief
assumes  that  operating  results  and cash flow from  operations  will meet the
Company's  expectations,  and  actual  results  could vary due to certain of the
factors described in the Trends and Uncertainties section that follows.


Trends and Uncertainties

Operating in the information  storage industry,  Quantum is affected by numerous
trends and  uncertainties,  some of which are  specific  to the  industry  while
others relate more specifically to Quantum. These are discussed below.

Trends and Uncertainties - Information Storage Industry

Key trends and  uncertainties  inherent in the information  storage industry and
how  these  trends  and  uncertainties   specifically  impact  the  Company  are
summarized below.

     o   Intense  competition - The  information  storage  products  industry in
         general, and the disk drive industry in particular, is characterized by
         intense competition that results in rapid price erosion;  short product
         life cycles;  and continuous  introduction of new, more  cost-effective
         products offering increased levels of capacity and performance.

     o   Rapid technological change - Technology  advancement in the information
         storage industry is increasingly rapid.

     o   Customer concentration - High-purchase-volume customers for information
         storage  products  are  concentrated  within a small number of computer
         system manufacturers, distribution channels, and system integrators.

     o   Fluctuating  product  demand - The demand for hard disk drive  products
         depends  on the  demand  for the  computer  systems  in which hard disk
         drives are used,  which in turn is affected by computer  system product
         cycles and by prevailing economic conditions.

                                                                              15
<PAGE>

     o   Intellectual property conflicts - The hard disk drive industry has been
         characterized  by significant  litigation  relating to patent and other
         intellectual property rights.

Intensely  Competitive  Industry.  To  compete  within the  information  storage
industry,  Quantum  frequently  introduces new products and transitions to newer
versions  of  existing  products.  Product  introductions  and  transitions  are
significant to the operating results of Quantum, and if they are not successful,
the Company would be  materially  and  adversely  affected.  The hard disk drive
industry  also tends to  experience  periods  of excess  product  inventory  and
intense price competition. If price competition intensifies,  the Company may be
forced to lower  prices more than  expected,  which could  materially  adversely
affect the Company.  In addition,  the Company's  customers  could  commence the
manufacture of disk and tape drives for their own use or for sale to others. Any
such loss of customers could have a material adverse effect on the Company.

Quantum faces direct competition from a number of companies,  including Seagate,
Western Digital, IBM, Maxtor, Exabyte and Sony. In the event that the Company is
unable to compete effectively with these or any other company, the Company would
be materially  adversely  affected.  The Company's  information  storage product
competition can be further broken down as follows:

         Desktop Storage Products.  In the market for desktop products,  Quantum
         competes primarily with Seagate,  Western Digital, and Maxtor.  Quantum
         and its  competitors  have  developed  and are  developing  a number of
         products  targeted  at  particular  segments  of this  market,  such as
         business  users and home PC buyers,  and factors such as time to market
         can have a significant effect on the success of any particular product.
         The desktop market is characterized by more competitiveness and shorter
         product life cycles than the hard disk drive market in general.

         Workstation and System Storage Products.  The Company faces competition
         in the high-capacity disk drive market primarily from Seagate,  IBM and
         Fujitsu.  Seagate has the largest share of the market for high-capacity
         disk drives.  Although the same competitive factors identified above as
         being generally  applicable to the overall disk drive industry apply to
         high-capacity  disk drives,  the Company  believes that the performance
         and quality of its  products  are more  important  to the users in this
         market than to users in the desktop  market.  The Company's  success in
         the high-capacity  market during the foreseeable future is dependent on
         the successful development,  timely introduction, and market acceptance
         of key new products, as to which there can be no assurance.

         Specialty Storage Products.  In the market for tape drives, the Company
         competes with other  companies  that have tape drive product  offerings
         and  alternative  formats.  The company  targets a market  segment that
         requires a mission  critical backup system and competes in this segment
         based on the  reliability  and durability of its tape drives.  Although
         the Company has  experienced  excellent  market  acceptance of its tape
         drive  products,  the  market  may  become  more  competitive  as other
         companies broaden their product line in this market.  As a result,  the
         Company  could  experience   increased  price

                                                                              16
<PAGE>

         competition.  If price competition occurs, the Company may be forced to
         lower prices,  in which case the Company could be materially  adversely
         affected.

Rapid  Technological  Change, New Product  Development,  and Qualification.  The
combination of an environment of rapid technological changes, short product life
cycles and competitive  pressures  results in gross margins on specific products
decreasing rapidly.  Accordingly, any delay in introduction of more advanced and
more  cost-effective  products can result in significantly lower sales and gross
margins.  The  Company's  future  is  therefore  dependent  on  its  ability  to
anticipate  what  customers  will demand and to develop the new products to meet
this demand.  The Company must also  qualify new  products  with its  customers,
successfully  introduce  these  products  to the market on a timely  basis,  and
commence volume  production to meet customer  demands.  For example,  during the
first  quarter of fiscal  1998 the  Company  expects to  introduce a new desktop
product  that will account for a  significant  portion of the  Company's  sales.
There can be no assurance  that the Company will  successfully  qualify this new
desktop  product with its  customers on a timely basis or that such product will
be produced in  sufficient  quantities  to meet  customer  demand.  Due to these
factors, the Company expects that sales of new products will continue to account
for a significant  portion of its future sales and that sales of older  products
will decline accordingly.

The Company is  frequently  in the process of  qualifying  new products with its
customers.   The  customer   qualification  process  for  disk  drive  products,
particularly  high-capacity products, can be lengthy, complex, and difficult. In
addition,  the  Company  transitioned  the  manufacturing  of its high  capacity
products to MKE during the first half of fiscal 1997,  and MKE has only recently
begun volume production of such  high-capacity  products.  In the event that the
Company is unable to obtain additional customer  qualifications for new products
in a timely manner, or at all, or in the event that MKE is unable to continue to
manufacture  such  products  in volume and with  consistent  high  quality,  the
Company would be materially adversely affected.

There can be no assurance that the Company will be successful in the development
and marketing of any new products and  components  in response to  technological
change or evolving  industry  standards,  that the Company  will not  experience
difficulties   that  could   delay  or  prevent  the   successful   development,
introduction  and  marketing  of  these  products  and  components;  or that the
Company's new products and components will  adequately meet the  requirements of
the  marketplace  and achieve  market  acceptance.  In  addition,  technological
advances in magnetic,  optical or other technologies,  or the development of new
technologies,  could result in the  introduction  of  competitive  products with
superior  performance  to and  substantially  lower  prices  than the  Company's
products.  Further,  the  Company's new products and  components  are subject to
significant  technological  risks.  If the  Company  experiences  delays  in the
commencement of commercial shipments of new products or components,  the Company
could experience delays or loss of product sales. If the Company is unable,  for
technological  or other  reasons,  to develop and  introduce  new  products in a
timely   manner  in  response  to  changing   market   conditions   or  customer
requirements, the Company would be materially adversely affected.

Customer Concentration.  In addition to the information storage industry and the
Company's  customer base being  concentrated,  the  customers  generally are not
obligated  to purchase any

                                                                              17
<PAGE>

minimum volume of the Company's products,  and the Company's  relationships with
its customers are generally terminable at will by its customers.

Sales of the  Company's  desktop  products,  which  comprise a  majority  of its
overall sales, were concentrated with several key customers in the quarter ended
June 29, 1997,  and the fiscal year ended March 31, 1997.  Sales to the top five
customers of the Company represented 46% of total sales for the first quarter of
fiscal 1998,  and 38% of sales for the fiscal year ended March 31, 1997.  In the
three month period ended June 29, 1997,  revenue from the top five customers was
derived  from  both  the  OEM  and  Distribution  sales  channel,  31%  and  15%
respectively.  On the OEM side both HP and Digital represented over 10% of total
revenue.  On the Distribution side Electronic  Resources  represented just under
10% of total  revenue.  In addition the Company is unable to predict  whether or
not there will be any  significant  change in demand  for any of its  customers'
products in the future.  In the event that any such changes  result in decreased
demand for the Company's  products,  whether by loss of or delays in orders, the
Company could be materially adversely affected.

Fluctuation in Product Demand.  Fluctuation in demand for the Company's products
generally results in fluctuations in the Company's operating results. Demand for
computer  systems-especially in the PC market segment, where the Company derives
a significant  amount of its disk drive sales-has  historically  been subject to
significant fluctuations. Such fluctuations in end-user demand have in the past,
and may in the future,  result in the deferral or cancellation of orders for the
Company's  products,  each of which could have a material  adverse effect on the
Company. During the past several years, there has been significant growth in the
demand for PCs, a portion of which represented sales of PCs for use in the home.
However,  many analysts predict that future growth may be at a moderately slower
rate than the rate experienced in recent years.

Sales of tape  drives and tape  drive-related  products,  which have been a less
significant component of sales for the Company than sales of disk drive products
but which have recently had a significant  impact on margins and  profitability,
have tended to be more stable.  In this regard the company  expects sales of DLT
products,  which  represented  18% of  sales  and a much  higher  percentage  of
operating profits for the quarter ended June 29, 1997, will continue to increase
as a  percentage  of the  Company's  total  sales and  operating  profits in the
future.

The Company has  experienced  longer product cycles for its tape drives and tape
drive-related  products,  compared with the short  product  cycles of disk drive
products. However, there is no assurance that this trend will continue.

The Company could experience decreases in demand for its products in the future,
which could have a material adverse effect on the Company. For the second fiscal
1998 quarter,  the Company expects to experience continued gross margin pressure
with respect to both its desktop and high-end hard disk drive products.

The hard disk  drive  industry  has also  been  subject,  from time to time,  to
seasonal   fluctuations  in  demand.  The  Company  has  typically   experienced
relatively  flat demand in the quarter  ending  September  30 compared  with the
quarter ending June 30. The Company  expects this trend to continue with respect
to the quarter ended  September 28, 1997. In addition,  the Company's 

                                                                              18
<PAGE>

shipments tend to be highest in the third month of each quarter,  which occurred
in the quarter ended June 29, 1997 and which the Company  expects to occur again
in the quarter ending  September 28, 1997. As a result,  and because the Company
has no long-term  purchase  commitments  from its  customers,  future  demand is
difficult  to predict.  The failure by the Company to complete  shipments in the
final  month of a quarter  due to a decline in  customer  demand,  manufacturing
problems or other factors would adversely affect the Company's operating results
for that quarter.


Intellectual  Property Matters.  From time to time, the Company is approached by
companies and individuals  alleging  Quantum's need for a license under patented
technology that Quantum assertedly uses. If required,  there can be no assurance
that  licenses  to  any  such  technology  could  be  obtained  or  obtained  on
commercially  reasonable terms. Adverse resolution of any intellectual  property
litigation  could subject the Company to substantial  liabilities and require it
to refrain  from  manufacturing  certain  products.  In  addition,  the costs of
engaging in such litigation may be substantial, regardless of the outcome.

Trends and Uncertainties More Specific to Quantum

Certain trends and uncertainties relate more specifically to Quantum and are not
necessarily  indicative of the information  storage  industry as a whole.  These
trends and  uncertainties  include  dependence on MKE for the manufacture of the
disk drives that  Quantum  develops and markets,  costs  associated  with the MR
recording head  development and  manufacture,  the recording heads joint venture
with MKE, dependence on suppliers,  component  shortages,  future capital needs,
warranty costs,  foreign  manufacturing,  and price volatility of Quantum common
stock. For information regarding litigation refer to "Legal Proceedings" below.

Dependence on MKE Relationship.  Quantum is dependent on MKE for the manufacture
of its disk drive  products.  Approximately  82% of the Company's  quarter ended
June 29, 1997 sales, and 81% of the year ended March 31,1997 sales, were derived
from  products  manufactured  by MKE. In  addition,  the  formation of the joint
venture with MKE to produce  recording  heads used in disk drive  production  in
combination   with  the  transition  of  the   manufacturing  of  the  Company's
high-capacity  products  to MKE in  fiscal  1997 has  resulted  in an  increased
dependence on MKE. The Company's  relationship with MKE is therefore critical to
the Company's business and financial performance.

In May 1997,  Quantum completed  renegotiation of its master agreement with MKE,
which covers the general terms of the business  relationship.  The agreement was
extended  for a period  of 10 years,  unless  sooner  terminated  as a result of
certain specified events including a change-in-control of either Quantum or MKE.
MKE currently manufactures all of the hard disk drives developed and marketed by
Quantum.  Quantum's  relationship  with MKE,  which dates from 1984, is built on
Quantum's  engineering and design expertise and MKE's high-volume,  high-quality
manufacturing expertise.

The Company's  dependence on MKE entails,  among others, the following principal
risks:

                                                                              19
<PAGE>

         Quality and Delivery.  The Company relies on MKE's ability to bring new
         products  rapidly  to  volume  production  at low  cost,  to  meet  the
         Company's  stringent  quality  requirements,  and to respond quickly to
         changing  product delivery  schedules from the Company.  This requires,
         among other  things,  close and  continuous  collaboration  between the
         Company and MKE in all phases of design,  engineering,  and production.
         The  Company's  business  and  financial  results  would  be  adversely
         affected if products  manufactured by MKE fail to satisfy the Company's
         quality requirements or if MKE is unable to meet the Company's delivery
         commitments. In the event MKE is unable to satisfy Quantum's production
         requirements,  the Company would not have an alternative  manufacturing
         source to meet the demand without  substantial  delay and disruption of
         the Company's operations.  As a result, the Company would be materially
         adversely affected.

         Volume and Pricing. MKE's production schedule is based on the Company's
         forecasts  of its product  purchase  requirements,  and the Company has
         limited  contractual rights to modify short-term purchase orders issued
         to MKE.  Further,  the demand in the  desktop  business  is  inherently
         volatile,  and there is no assurance  that the Company's  forecasts are
         accurate.  In addition,  the Company  periodically  negotiates  pricing
         arrangements  with  MKE.  The  failure  of the  Company  to  accurately
         forecast its  requirements  or  successfully  adjust  MKE's  production
         schedule,  which could lead to inventory shortages or surpluses, or the
         failure to reach  pricing  agreements  reasonable  to the Company would
         have a material adverse effect on the Company.

         Manufacturing  Capacity and Capital  Commitment.  The Company  believes
         that MKE's  current  and  committed  manufacturing  capacity  should be
         adequate to meet the Company's requirements at least through the end of
         fiscal 1998. The Company's  future growth will require,  however,  that
         MKE  continue to devote  substantial  financial  resources to property,
         plant and equipment and working  capital to support  manufacture of the
         Company's products, as to which there can be no assurance. In the event
         that MKE is unable or  unwilling  to meet the  Company's  manufacturing
         requirements,  there can be no assurance that the Company would be able
         to obtain an alternate source of supply.  Any such failure to obtain an
         alternative source would have a material adverse effect on the Company.

MR  Recording  Heads  Development  and  Manufacturing.  Since  the  fiscal  1995
acquisition  of MR recording  heads  technology  as part of the  acquisition  of
certain   businesses  of  the  Storage   Business  Unit  of  Digital   Equipment
Corporation,  Quantum has made significant efforts to advance the development of
its MR recording  heads  capability.  To further  this  effort,  MKE and Quantum
formed a joint  venture in the first  quarter  of fiscal  1998 to partner in the
research,  development,  and  production  of MR heads  and  technology.  Quantum
believes that through  MKE's  manufacturing  expertise,  the potential of the MR
heads  operations  will be  realized  to the  benefit  of both MKE and  Quantum.
However,  cost-effective  production of MR recording heads is not expected to be
realized in the near term.  Until that time, the Company will incur losses based
on its pro rata ownership interest in the new joint venture.  However, there can
be no  assurance  that the  benefits of the joint  venture will be realized on a
timely basis or at all.

Although the Company currently obtains the majority of its MR heads from outside
sources,  the Company  believes that by  manufacturing MR heads it has developed
in-depth  knowledge of MR 

                                                                              20
<PAGE>

head technology.  The Company  believes that MR head  technology,  which enables
higher  capacity per disk than  conventional  thin-film  inductive  heads,  will
replace inductive heads as the leading recording head technology. This knowledge
is leveraged in the research, development, and production of disk drive products
that utilize MR head technology. In addition, the Company believes that having a
captive supply of MR heads lowers the risk of MR head supply  shortages that may
occur in the  future  as a  result  of  increased  requirements  for disk  drive
products that utilize MR recording heads.  However,  MR technology is relatively
complex and, to date, the Company's  manufacturing  yields for its MR heads have
been lower than would be necessary for cost effective production of MR recording
heads.

There is an additional uncertainty associated with maintaining or increasing the
supply of MR recording heads used in the  manufacture of disk drives.  There are
limited  alternative sources of supply for MR recording heads. In the event that
current  sources of MR recording  heads,  which  include the joint  venture's MR
heads operations,  do not meet disk drive production requirements,  there can be
no  assurance  that the  Company  will be able to  locate  and  obtain  adequate
supplies  from  alternative  sources.  A shortage  of MR  recording  heads would
materially adversely affect the Company.

Dependence on Suppliers of Components and Sub-Assemblies;  Component  Shortages.
Each of the  Company  and its  manufacturing  partner,  MKE,  are  dependent  on
qualified  suppliers for  components  and  sub-assemblies,  including  recording
heads, media, and integrated circuits, which are essential to the manufacture of
the Company's  disk drive and tape drive  products.  In connection  with certain
products,  the  Company  and  MKE  qualify  only a  single  source  for  certain
components  and  sub-assemblies,  which  can  magnify  the  risk  of  shortages.
Component shortages have constrained the Company's sales growth in the past, and
the Company believes that the industry will  periodically  experience  component
shortages.  For example,  during the quarter ended June 29, 1997,  the Company's
ability  to meet  customer  demand  for its tape  drive  products  was  somewhat
constrained by component  availibility.  If component shortages occur, or if the
Company  experiences  quality  problems with component  suppliers,  shipments of
products could be significantly delayed or costs significantly increased,  which
would have a material adverse effect on the Company.

Future Capital Needs.  The information  storage industry is capital and research
and  development  intensive  and the  Company  will  need to  maintain  adequate
financial resources for capital expenditures,  working capital, and research and
development, in order to remain competitive in the information storage business.
The Company believes that it will be able to fund these capital  requirements at
least  through  fiscal  1998.  However,  if the Company  decides to increase its
capital  expenditures  further,  or sooner than  presently  contemplated,  or if
results of operations do not meet the Company's expectations,  the Company could
require additional debt or equity financing. There can be no assurance that such
additional  funds  will be  available  to the  Company or will be  available  on
favorable  terms.  The Company  may also  require  additional  capital for other
purposes  not  presently  contemplated.  If the  Company  is  unable  to  obtain
sufficient  capital,  it could be required to curtail its capital  equipment and
research and development expenditures, which could adversely affect the Company.

                                                                              21
<PAGE>

Warranty.  Quantum generally  warrants its products against defects for a period
of one to five  years.  A  provision  for  estimated  future  costs  relating to
warranty  expense is recorded  when  products are shipped.  The actual  warranty
expenditures  could have a  material  unfavorable  impact on the  Company if the
actual  rate of unit  failure or the cost to repair a unit is greater  than what
the Company has used in estimating the warranty expense accrual.

Risks Associated with Foreign Manufacturing.  Many of the Company's products are
currently  manufactured  outside the United States. As a result,  the Company is
subject to certain risks associated with contracting with foreign manufacturers,
including obtaining requisite United States and foreign governmental permits and
approvals,  currency exchange  fluctuations,  currency  restrictions,  political
instability,  labor  problems,  trade  restrictions,  and  changes in tariff and
freight rates.

Foreign Exchange  Contracts.  The Company manages the impact of foreign currency
exchange rate changes on certain foreign currency receivables and payables using
foreign  currency  forward  exchange  contracts.  With this approach the Company
expects  to  minimize  the  impact of  changing  foreign  exchange  rates on the
Company's  net  income.  However,  there can be no  assurance  that all  foreign
currency  exposures  will be  adequately  managed,  and the Company  could incur
material charges as a result of changing foreign exchange rates. Refer to Note 2
of the Notes to  Consolidated  Financial  Statements for additional  information
regarding foreign currency forward exchange contracts.

Volatility of Stock Price.  The market price of the  Company's  common stock has
been, and may continue to be,  extremely  volatile.  Factors such as new product
announcements by the Company or its competitors;  quarterly  fluctuations in the
operating  results  of  the  Company,  its  competitors,  and  other  technology
companies;  and general conditions in the computer market may have a significant
impact on the market price of the common stock.  In  particular,  if the Company
were to  report  operating  results  that did not meet the  expectations  of the
analysts,  the market  price of the common stock could be  materially  adversely
affected.

                                                                              22
<PAGE>


                               QUANTUM CORPORATION

                           PART II - OTHER INFORMATION


Item 1.     Legal proceedings

Refer to Note 5 of the Notes to Condensed Consolidated Financial Statements.


Item 2.     Changes in securities - Not Applicable.


Item 3.     Defaults upon senior securities - Not Applicable


Item 4.     Submission of matters to a vote of security holders - Not Applicable


Item 5.     Other information - Not Applicable


Item 6.     Exhibits and reports on Form 8-K.

              (a)  Exhibits.       The exhibits listed on the accompanying index
                                   to   exhibits   immediately   following   the
                                   signature  page  are  filed  as  part of this
                                   report.

              (b)  Reports on Form 8-K.

                  (1)  Form 8-K dated May 16, 1997

                  (2)  Form 8-K dated July 28, 1997

                  (3)  Form 8-K dated August 6, 1997

                                                                              23
<PAGE>

                                    SIGNATURE



Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                          QUANTUM CORPORATION
                                             (Registrant)




Date: August 13, 1997            By:    /s/ Richard L. Clemmer
                                        ----------------------
                                        Richard L. Clemmer
                                        Executive Vice President, Finance
                                          and Chief Financial Officer


                                                                              24
<PAGE>

                               QUANTUM CORPORATION

                                INDEX TO EXHIBITS

Exhibit
Number

4.1(1)   Indenture,  dated August 1, 1997,  between the  Registrant and La Salle
         National  Bank  as  trustee  ("Trustee")  related  to  the  Registrants
         subordinated debt securities

4.2(1)   Supplemental  Indenture,  dated August 1, 1997,  between the Registrant
         and Trustee, relating to the Notes (including the form of Note)

4.3      Certificate  of Amendment of Certificate  of  Incorporation  of Quantum
         Corporation, dated April 29, 1997

10.1     Lease (dated April 16, 1997)  between  Registrant  and John  Arrillaga,
         Trustee

10.2     Credit Agreement dated June 6, 1997, among Quantum  Corporation and the
         Banks Named Herein and ABN AMRO BANK N.V., San Francisco  International
         Branch  and CIBC  INC.  as  Co-Arrangers  for the  Banks  and  CANADIAN
         IMPERIAL BANK OF COMMERCE,  as  Administrative  Agent for the Banks and
         ABN AMRO BANK N.V., San Francisco  International Branch, as Syndication
         Agent for the  Banks and BANK OF  AMERICA  NATIONAL  TRUST AND  SAVINGS
         ASSOCIATION as Documentation Agent for the Banks

10.3(2)  Amended and  Restated  Master  Agreement,  dated April 30, 1997 between
         Registrant and MKE

10.4(2)  Amended and Restated Purchase  Agreement,  dated April 30, 1997 between
         Registrant and MKE

10.5(2)  License  Agreement,  effective  January 1, 1996,  dated April 17, 1997,
         between   International   Business  Machines  Corporation  and  Quantum
         Corporation

11.1     Statement of Computation of Net Income Per Share

27       Financial Data Schedule

- -----------------------------------

(1)  Incorporated by reference to the Form 8-K, dated August 6, 1997, filed with
     the Securities and Exchange Commission.
(2)  The Company has requested  confidential  treatment for certain  portions of
     this agreement.  The confidential  portions have been separately filed with
     the Securities and Exhchange Commission.

                                                                              25



                           CERTIFICATE OF AMENDMENT OF

                         CERTIFICATE OF INCORPORATION OF

                               QUANTUM CORPORATION


         Quantum  Corporation,  a corporation  organized and existing  under the
General Corporation Law of the State of Delaware (the "Corporation") does hereby
certify that:

         The amendment to the  Corporation's  Certificate of  Incorporation  set
forth in the following  resolution  was approved by the  Corporation's  Board of
Directors  and  stockholders  and  was  duly  adopted  in  accordance  with  the
applicable provisions of Section 242 of the General Corporation Law of the State
of Delaware.

         RESOLVED:  That the first  paragraph of Section 4 of the Certificate of
         Incorporation  of this  corporation  is hereby  amended  to read in its
         entirety as follows:

                  "The total  number of shares of all classes of stock which the
                  corporation  has  authority  to  issue  is Five  Hundred  Four
                  Million  (504,000,000)  shares,  consisting  of  Five  Hundred
                  Million  (500,000,000)  shares of Common Stock, $.01 par value
                  (the "Common Stock"),  and Four Million  (4,000,000) shares of
                  Preferred Stock, $.01 par value (the "Preferred Stock").

         IN WITNESS WHEREOF,  QUANTUM CORPORATION has caused this Certificate to
be signed and attested by its duly  authorized  officers this 29th day of April,
1997.


                                QUANTUM CORPORATION


                                By: /s/ Michael A. Brown
                                       Michael A. Brown
                                       President and Chief Executive Officer


ATTEST


By:  /s/ Andrew Kryder
   ------------------------
         Andrew Kryder
         Vice President, Corporate General Counsel
         and Assistant Secretary



                                                    BLDG: Quantum 6
                                                    OWNER: 500
                                                    PROP: 225
                                                    UNIT: 1
                                                    TENANT: 22501

                                LEASE AGREEMENT

THIS LEASE, made this 16th day of April,  1997 between JOHN ARRILLAGA,  Trustee,
or his Successor Trustee, UTA dated 7/20/77 (JOHN ARRILLAGA SURVIVOR'S TRUST) as
amended,  and RICHARD T. PEERY,  Trustee,  or his Successor  Trustee,  UTA dated
7/20/77    (RICHARD   T.   PEERY   SEPARATE    PROPERTY    TRUST)   as   amended
____________________________________________,  hereinafter called Landlord,  and
QUANTUM CORPORATION, a Delaware corporation, hereinafter called Tenant.

                                  WITNESSETH:

Landlord hereby leases to Tenant and Tenant hereby hires and takes from Landlord
those certain premises (the "Premises") outlined in red on Exhibit "A", attached
hereto and  incorporated  herein by this  reference  thereto  more  particularly
described as follows:

All of that  land  containing  approximately  9.56+/-  acres  and  that  certain
182,355+/- square foot two-story building ("Building 6") and parking appurtenant
thereto,  to be  constructed  and installed by Landlord as shown within the area
outlined  in  Green  on  Exhibit  A to be  located  on  Sumac  Drive,  Milpitas,
California,  95035.  Said  Premises is more  particularly  shown within the area
outlined  in Red in Exhibit A attached  hereto and  incorporated  herein by this
reference.  The interior of the Leased Premises shall be improved by Landlord in
the  configuration  as shown  in Red on  Exhibit  B to be  attached  hereto  and
incorporated  herein by this reference.  The building shell shall be constructed
in accordance with the shell and site  improvement  specifications  set forth on
Exhibit A, and the general building elevation set forth on Exhibit A.

  The word "Premises" as used throughout this lease is hereby defined to include
the  Hetch-Hetchy  Land as described in Paragraph  49, the  nonexclusive  use of
landscaped  areas,  sidewalks  and  driveways  in  front of or  adjacent  to the
Premises,  and the nonexclusive use of the area directly underneath or over such
sidewalks  and  driveways.  The gross  leasable  area of the  building  shall be
measured from outside of exterior walls to outside of exterior walls,  and shall
include any atriums,  covered  entrances or egresses and covered  loading areas.

  Said  letting  and  hiring is upon and  subject to the  terms,  covenants  and
conditions  hereinafter set forth and Tenant covenants as a material part of the
consideration  for this Lease to perform and observe each and all of said terms,
covenants  and  conditions.  This  Lease  is made  upon the  conditions  of such
performance and observance.

1. USE  Tenant  shall  use the  Premises  only in  conformance  with  applicable
governmental laws, regulations,  rules and ordinances for the purpose of office,
sales and R&D, and related uses  necessary for the use of Tenant or any approved
assignee or subtenant to conduct its business  providing any and all uses of the
Premises shall be subject to and in conformance with all  governmental  laws and
ordinances,  and for no other purpose without  Landlord's prior written consent,
Tenant  shall not do or permit to be done in or about the  Premises nor bring or
keep or permit to be brought or kept in or about the Premises  anything which is
prohibited  by or will in any way increase the  existing  rate of (or  otherwise
affect) fire or any insurance covering the Premises or any part thereof,  or any
of its contents  without the prior  written  consent of  Landlord,  and provided
Tenant  bears  any  cost  related  to  such  increased  rate,  or  will  cause a
cancellation of any insurance covering the Premises or any part thereof,  or any
of its  contents.  Tenant  shall not do or permit to be done  anything in, on or
about the Premises  which will in any way obstruct or interfere  with the rights
of other tenants or occupants of the Premises or neighboring  premises or injure
or  annoy  them,  or use or allow  the  Premises  to be used  for any  improper,
immoral,  unlawful or objectionable purpose, nor shall Tenant cause, maintain or
permit any nuisance in, on or about the  Premises.  No sale by auction  shall be
permitted  on the  Premises.  Tenant  shall not place any loads upon the floors,
walls,  or ceiling which endanger the structure,  or place any harmful fluids or
other  materials in the drainage  system of the building,  or overload  existing
electrical or other  mechanical  systems.  No waste materials or refuse shall be
dumped upon or  permitted  to remain upon any part of the Premises or outside of
the building in which the Premises are a part, except in trash containers placed
inside exterior enclosures  designated by Landlord for that purpose or inside of
the  building  proper where  designated  by Landlord.  No  materials,  supplies,
equipment,  finished  products  or  semi-finished  products,  raw  materials  or
articles of any nature shall be stored upon or  permitted to remain  outside the
Premises.  Tenant shall not place  anything or allow  anything to be placed near
the glass of any window,  door partition or wall which may appear unsightly from
outside the Premises.  No loudspeaker or other device, system or apparatus which
can be heard  outside the Premises  shall be used in or at the Premises  without
the prior written  consent of Landlord.  Tenant shall not commit or suffer to be
committed any waste in or upon the Premises. Tenant shall indemnify,  defend and
hold Landlord harmless against any loss, expense, damage,  reasonable attorneys'
fees,  or  liability  arising  out of  failure  of  Tenant  to  comply  with any
applicable  law that governs  Tenant's use of the Premises.  Tenant shall comply
with any covenant,  condition, or restriction ("CC&R's") affecting the Premises.
The  Provisions of this paragraph are for the benefit of Landlord only and shall
not be  construed  to be for  the  benefit  of any  tenant  or  occupant  of the
Premises.

2. TERM AND COMMENCEMENT DATE OF LEASE: See Paragraph 40, 41 & 42 of this Lease.
<PAGE>

3.  POSSESSION  If Landlord,  for any reason  whatsoever  other than  Landlord's
default,   cannot  deliver   possession  of  said  premises  to  Tenant  at  the
commencement of the said term, as hereinbefore  specified,  this Lease shall not
be void or voidable;  no  obligation  of Tenant shall be affected  thereby;  nor
shall  Landlord or Landlord's  agents be liable to Tenant for any loss or damage
resulting therefrom; but in that event the commencement and termination dates of
the Lease,  and all other dates affected  thereby shall be revised to conform to
the date of  Landlord's  delivery of  possession,  as specified in Paragraph 2B,
above. The above is, however,  subject to the provision that the period of delay
of delivery of the Premises shall not exceed 180 days from the commencement date
herein  (except those delays  caused by Acts of God,  strikes,  war,  utilities,
governmental  bodies,   weather,   unavailable  materials,   and  delays  beyond
Landlord's  control  shall be  excluded  in  calculating  such  period) in which
instance Tenant,  at its option,  may, by written notice to Landlord,  terminate
this Lease.

4. RENT
   A. Basic Rent. Tenant agrees to pay to Landlord at such place as Landlord may
designate  without  deduction,  offset,  prior notice,  or demand,  and Landlord
agrees to  accept as Basic  Rent for the  leased  Premises  the total sum of the
amount for the original Lease Term to be calculated pursuant to Paragraph 39.

   B. Time for Payment.  Full monthly rent is due in advance on the first day of
each  calendar  month.  In the event that the term of this Lease  commences on a
date other than the first day of a calendar  month,  on the date of commencement
of the term hereof Tenant shall pay to Landlord as rent for the period from such
date of commencement to the first day of the next succeeding calendar month that
proportion of the monthly rent  hereunder  which the number of days between such
date of  commencement  and the first day of the next  succeeding  calendar month
bears to thirty  (30).  In the event  that the term of this Lease for any reason
ends on a date other than the last day of a calendar  month, on the first day of
the last calendar  month of the term hereof Tenant shall pay to Landlord as rent
for the period from said first day of said last calendar  month to and including
the last day of the term hereof that  proportion  of the monthly rent  hereunder
which the number of days between said first day of said last calendar  month and
the last day of the term hereof bears to thirty (30).

   C. Late Charge.  Notwithstanding any other provision of this Lease, if Tenant
is in default in the  payment  of rental as set forth in this  Paragraph  4 when
due, or any part  thereof,  Tenant  agrees to pay  Landlord,  in addition to the
delinquent rental due, a late charge for each rental payment in default ten (10)
days.  Said late charge shall equal ten percent (10%) of each rental  payment so
in default.

   D.  Additional  Rent.  Beginning  with the  commencement  date of the term of
thisease,  Tenant  shall pay to Landlord or to  Landlord's  designated  agent in
addition to the Basic Rent and as Additional Rent the following:

      (a) All Taxes  relating to the  Premises as set forth in  Paragraph 9, and

      (b) All  insurance  premiums  relating  to the  Premises,  as set forth in
Paragraph 12, and

      (c) All  charges,  costs and  expenses,  which  Tenant is  required to pay
hereunder,  together  with  all  interest  and  penalties,  costs  and  expenses
including reasonable attorneys' fees and legal expenses, that may accrue thereto
in the  event  of  Tenant's  failure  to pay  such  amounts,  and  all  damages,
reasonable  costs and expenses  which Landlord may incur by reason of default of
Tenant or failure on Tenant's  part to comply  with the terms of this Lease.  In
the event of nonpayment by Tenant of Additional  Rent,  Landlord  shall have all
the rights and remedies with respect  thereto as Landlord has for  nonpayment of
rent.

   The  Additional  Rent due  hereunder  shall be paid to Landlord or Landlord's
agent (i) within five days for taxes and  insurance  and within thirty (30) days
for all other Additional Rent items after  presentation of invoice from Landlord
or Landlord's agent setting forth such Additional rent and/or (ii) at the option
of Landlord,  Tenant shall pay to Landlord monthly, in advance, Tenant's prorata
share of an amount  estimated by Landlord to be Landlord's  approximate  average
monthly expenditure for such Additional Rent items, which estimated amount shall
be  reconciled  within  180  days  of the  end of  each  calendar  year  or more
frequently  if  Landlord  elects  to do  so  at  Landlord's  sole  and  absolute
discretion as compared to Landlord's actual expenditure for said Additional Rent
items,  with  Tenant  paying to  Landlord,  upon  demand,  any  amount of actual
expenses  expended by Landlord in excess of said estimated  amount,  or Landlord
crediting  to  Tenant's  account  (providing  Tenant  is not in  default  in the
performance  of any of the terms,  covenants and  conditions  of this Lease,  in
which  case such  amount  shall be held by  Landlord  as a credit  for  Tenant's
account until such default has been cured) any amount of estimated payments made
by Tenant in excess of Landlord's  actual  expenditures for said Additional Rent
items.

   E. Fixed Management Fee.  Beginning with the Commencement Date of the Term of
this  Lease,  Tenant  shall pay to  Landlord,  in addition to the Basic Rent and
Additional Rent, a fixed monthly  management fee ("Management  Fee") equal to 1%
of the Basic Rent due for each month during the Lease Term.

   The respective  obligations of Landlord and Tenant under this paragraph shall
survive the expiration or other  termination  of the term of this Lease,  and if
the term hereof  shall expire or shall  otherwise  terminate on a day other than
the last day of a calendar  year,  the actual  Additional  Rent incurred for the
calendar year in which the term hereof expires or otherwise  terminates shall be
determined and settled on the basis of the statement of actual  Additional  Rent
for such calendar year and shall be prorated in the proportion  which the number
of days in such calendar year preceding such expiration or termination  bears to
365.

   F. Place of Payment of Rent and Additional Rent. All Basic Rent hereunder and
all  payments  hereunder  for  Additional  Rent shall be paid to Landlord at the
office of Landlord at Peery/Arrillaga,  File 1504, Box 60000, San Francisco,  CA
94160 or to such other  person or to such other place as Landlord  may from time
to time designate in writing.

   G. Security  Deposit.  Concurrently  with  Tenant's  execution of this Lease,
Tenant shall deposit with Landlord the sum of SEVEN HUNDRED ELEVEN  THOUSAND ONE
HUNDRED EIGHTY FOUR AND 50/100 Dollars ($711,184.50).  Said sum shall be held by
Landlord as a Security Deposit for the faithful  performance by Tenant of all of
the terms,  covenants,  and conditions of this Lease to be kept and performed by
Tenant during the term hereof.  If Tenant defaults with respect to any provision
of this Lease,  including,  but not limited to, the  provisions  relating to the
payment of rent and any of the  monetary  sums due  herewith,  Landlord may (but
shall not be required to) use,  apply or retain all or any part of this Security
Deposit for the payment of any other amount  which  Landlord may spend by reason
of Tenant's default or to compensate Landlord for

                                   page 2 of 8
<PAGE>

any other  loss or  damage  which  Landlord  may  suffer  by reason of  Tenant's
default.  If any portion of said  Deposit is so used or applied,  Tenant  shall,
within ten (10) days after written demand  therefor,  deposit cash with Landlord
in the amount sufficient to restore the Security Deposit to its original amount.
Tenant's  failure to do so shall be a material  breach of this  Lease.  Landlord
shall not be required to keep this  Security  Deposit  separate from its general
funds,  and Tenant shall not be entitled to interest on such Deposit.  If Tenant
fully and faithfully  performs every  provision of this Lease to be performed by
it, the Security  Deposit or any balance thereof shall be returned to Tenant (or
at Landlord's  option, to the last assignee of Tenant's  interest  hereunder) at
the  expiration of the Lease term and after Tenant has vacated the Premises.  In
the event of  termination of Landlord's  interest in this Lease,  Landlord shall
transfer  said  Deposit to  Landlord's  successor in interest  whereupon  Tenant
agrees to release  Landlord from liability for the return of such Deposit or the
accounting therefor. See Paragraph 50

5. ACCEPTANCE AND SURRENDER OF PREMISES By entry  hereunder,  Tenant accepts the
Premises as being in good and sanitary  order,  condition and repair and accepts
the  building  and  improvements  included  in the  Premises  in  their  present
condition and without representation or warranty by Landlord as to the condition
of such building or as to the use or occupancy  which may be made  thereof.  Any
exceptions to the foregoing  must be by written  agreement  executed by Landlord
and Tenant.  Tenant  agrees on the last day of the Lease term,  or on the sooner
termination of this Lease,  to surrender the Premises  promptly and peaceably to
Landlord in good condition and repair (damage by Acts of God, fire,  normal wear
and tear excepted),  with all interior walls cleaned so that they appear freshly
painted,  and repaired and replaced,  if damaged;  all floors cleaned and waxed;
all  carpets  cleaned  and  shampooed;   all  broken,  marred  or  nonconforming
accoustical ceiling tiles replaced;  all windows washed; the airconditioning and
heating  systems  serviced by a reputable and licensed  service firm and in good
operating condition and repair; the plumbing and electrical systems and lighting
in good  order and  repair,  including  replacement  of any burned out or broken
light bulbs or ballasts;  the lawn and shrubs in good  condition  including  the
replacement  of any dead or  damaged  plantings;  the  sidewalk,  driveways  and
parking  areas  in  good  order,   condition  and  repair;   together  with  all
alterations,  additions, and improvements which may have been made in, to, or on
the Premises (except moveable trade fixtures installed at the expense of Tenant)
except that Tenant shall  ascertain from Landlord within ninety (90) days before
the end of the term of this Lease whether  Landlord desires to have the Premises
or any part or parts thereof  restored to their condition and  configuration  as
when the Premises were delivered to Tenant and if Landlord shall so desire, then
Tenant shall restore said Premises or such part or parts thereof  before the end
of this Lease at Tenant's sole cost and expense. Tenant, on or before the end of
the term or sooner  termination  of this  Lease,  shall  remove all of  Tenant's
personal property and trade fixtures from the Premises,  and all property not so
removed  on or before  the end of the term or sooner  termination  of this Lease
shall be deemed  abandoned by Tenant and title to same shall  thereupon  pass to
Landlord without compensation to Tenant.  Landlord may, upon termination of this
Lease,  remove all moveable  furniture and equipment so abandoned by Tenant,  at
Tenant's  sole cost,  and repair any damage  caused by such  removal at Tenant's
sole cost. If the Premises be not  surrendered  at the end of the term or sooner
termination  of this Lease,  Tenant  shall  indemnify  Landlord  against loss or
liability  resulting  from the delay by Tenant in so  surrendering  the Premises
including,  without limitation, any claims made by any succeeding tenant founded
on such delay.  Nothing  contained  herein shall be construed as an extension of
the term hereof or as a consent of Landlord to any holding  over by Tenant.  The
voluntary or other surrender of this Lease or the Premises by Tenant or a mutual
cancellation  of this  Lease  shall not work as a merger  and,  at the option of
Landlord,  shall either terminate all or any existing  subleases or subtenancies
or  operate  as an  assignment  to  Landlord  of all or any  such  subleases  or
subtenancies. See Paragraph 51

6.  ALTERATIONS  AND ADDITIONS  Tenant shall not make, or suffer to be made, any
alteration or addition to the Premises, or any part thereof, without the written
consent of Landlord  first had and  obtained by Tenant  (such  consent not to be
unreasonably  withheld),  but at the cost of  Tenant,  and any  addition  to, or
alteration of, the Premises, except moveable furniture and trade fixtures, shall
at once become a part of the Premises and belong to Landlord.  Landlord reserves
the right to approve all  contractors  and mechanics  proposed by Tenant to make
such  alterations  and  additions.  Tenant  shall  retain  title to all moveable
furniture  and trade  fixtures  placed in the Premises.  All heating,  lighting,
electrical,  airconditioning, floor to ceiling partitioning, drapery, carpeting,
and floor  installations  made by Tenant,  together  with all property  that has
become an integral  part of the  Premises,  shall not be deemed trade  fixtures.
Tenant  agrees that it will not proceed to make such  alteration  or  additions,
without having obtained  consent from Landlord to do so, and until five (5) days
from the receipt of such consent,  in order that  Landlord may post  appropriate
notices to avoid any liability to contractors or material  suppliers for payment
for  Tenant's  improvements.  Tenant will at all times permit such notices to be
posted and to remain  posted until the  completion  of work.  Tenant  shall,  if
required by Landlord,  secure at Tenant's own cost and expense, a completion and
lien indemnity  bond,  satisfactory to Landlord,  for such work.  Tenant further
covenants  and agrees that any  mechanic's  lien filed  against the Premises for
work claimed to have been done for, or materials  claimed to have been furnished
to Tenant,  will be discharged by Tenant, by bond or otherwise,  within ten (10)
days after Tenant receives notice of the filing thereof, at the cost and expense
of Tenant.  Any exceptions to the foregoing must be made in writing and executed
by both Landlord and Tenant. See Paragraph 51

7. TENANT  MAINTENANCE  Tenant  shall,  at its sole cost and  expense,  keep and
<PAGE>

maintain the Premises (including appurtenances) and every part thereof in a high
standard of maintenance  and repair,  or  replacement,  and in good and sanitary
condition.  Tenant's maintenance and repair  responsibilities herein referred to
include,  but are not limited to,  janitorization,  all  windows  (interior  and
exterior),  window frames, plate glass and glazing (destroyed by accident or act
of third parties), truck doors, plumbing systems (such as water and drain lines,
sinks,  toilets,  faucets,  drains,  showers  and water  fountains),  electrical
systems (such as panels,  conduits,  outlets,  lighting fixtures,  lamps, bulbs,
tubes and ballasts),  heating and airconditioning  systems (such as compressors,
fans, air handlers,  ducts,  mixing boxes,  thermostats,  time clocks,  boilers,
heaters, supply and return grills), structural elements and exterior surfaces of
the building, store fronts, roofs, downspouts,  all interior improvements within
the premises  including  but not limited to wall  coverings,  window  coverings,
carpet,  floor  coverings,  partitioning,  ceilings,  doors (both  interior  and
exterior),  including closing mechanisms,  latches,  locks,  skylights (if any),
automatic  fire  extinguishing  systems,  and elevators  and all other  interior
improvements of any nature whatsoever,  and all exterior improvements  including
but not limited to  landscaping,  sidewalks,  driveways,  parking lots including
striping and sealing, sprinkler systems, lighting, ponds, fountains,  waterways,
and drains.  Tenant agrees to provide carpet shields under all rolling chairs or
to  otherwise  be  responsible  for wear and tear of the  carpet  caused by such
rolling  chairs if such wear and tear exceeds that caused by normal foot traffic
in surrounding areas. Areas of excessive wear shall be replaced at Tenant's sole
expense upon Lease  termination.  Tenant  hereby  waives all rights  under,  and
benefits  of,  Subsection  1 of Section  1932 and  Section  1941 and 1942 of the
California  Civil Code and under any similar law,  statute or  ordinance  now or
hereafter in effect. In the event any of the above maintenance  responsibilities
apply to any other  tenant(s) of Landlord where there is common usage with other
tenant(s),  such maintenance  responsibilities and charges shall be allocated to
the leased Premises by square footage or other equitable basis as calculated and
determined by Landlord. See Paragraph 52

8. UTILITIES Tenant shall pay promptly,  as the same become due, all charges for
water, gas,  electricity,  telephone,  telex and other electronic  communication
service,  sewer  service,  waste pick-up and any other  utilities,  materials or
services furnished directly to or used by Tenant on or about the Premises during
the  term of  this  Lease,  including,  without  limitation,  any  temporary  or
permanent  utility  surcharge  or other  exactions  whether  or not  hereinafter
imposed. In the event the above charges apply to any other tenant(s) of Landlord
where  there is  common  usage  with  other  tenant(s),  such  charges  shall be
allocated to the leased  Premises by square footage or other  equitable basis as
calculated and determined by landlord.

   Landlord  shall not be liable for and  Tenant  shall not be  entitled  to any
abatement  or  reduction  of rent by reason of any  interruption  or  failure of
utility services to the Premises when such  interruption or failure is caused by
accident,  breakage,  repair, strikes,  lockouts, or other labor disturbances or
labor  disputes of any nature,  or by any other  cause,  similar or  dissimilar,
beyond the reasonable control of Landlord.

9. TAXES

   A.  Notwithstanding the following,  Tenant is responsible for paying all real
estate taxes and  assessments  assessed on the Premises  leased  hereunder  from
November 1, 1995. As Additional Rent and in accordance with Paragraph 4D of this
Lease, Tenant shall pay to Landlord, or if Landlord so directs,  directly to the
Tax Collector,  all Real Property  Taxes relating to the Premises.  In the event
the  Premises  leased  hereunder  consist  of only a portion  of the  entire tax
parcel,  Tenant shall pay to Landlord Tenant's  proportionate share of such real
estate  taxes  allocated  to the  leased  Premises  by square  footage  or other
reasonable  basis as calculated and  determined by Landlord.  If the tax billing
pertains  100% to the leased  Premises, and Landlord  chooses to have Tenant pay
said real  estate  taxes  directly to the Tax  Collector,  then in such event it
shall be the responsibility of Tenant to obtain the tax and assessment bills and
pay, prior to  delinquency,  the applicable  real property taxes and assessments
pertaining  to the  leased  Premises,  and  failure  to receive a bill for taxes
and/or   assessments   shall  not  provide  a  basis  for   cancellation  of  or
nonresponsibility  for payment of penalties  for  nonpayment  or late payment by
Tenant.  The term "Real  Property  Taxes",  as used  herein,  shall mean (i) all
taxes,  assessments,  levies and other charges of any kind or nature whatsoever,
general and special,  foreseen and  unforeseen  (including all  installments  of
principal and interest  required to pay any general or special  assessments  for
public improvements and any increases resulting from reassessments caused by any
change  in  ownership  of  the  Premises)  now  or  hereafter   imposed  by  any
governmental  or  quasi-governmental  authority or special  district  having the
direct  or  indirect  power to tax or levy  assessments,  which  are  levied  or
assessed against, or with respect to the value,  occupancy or use of, all or any
portion of the Premises (as now  constructed  or as may at any time hereafter be
constructed,  altered, or otherwise changed) or Landlord's interest therein; any
improvements  located  within  the  Premises  (regardless  of  ownership);   the
fixtures,  equipment and other property of Landlord,  real or personal, that are
an  integral  part of and  located in the  Premises;  or parking  areas,  public
utilities,  or energy  within the  Premises;  (ii) all  charges,  levies or fees
imposed by reason of environmental  regulation or other governmental  control of
the Premises; and (iii) all costs and fees (including

                                   page 3 of 8
<PAGE>

reasonable  attorneys'  fees) incurred by Landlord in reasonably  contesting any
Real  Property Tax and in  negotiating  with public  authorities  as to any Real
Property  Tax.  If at any time  during  the term of this Lease the  taxation  or
assessment of the Premises  prevailing as of the commencement date of this Lease
shall be  altered so that in lieu of or in  addition  to any Real  property  Tax
described above there shall be levied, assessed or imposed (whether by reason of
a change in the  method of  taxation  or  assessment,  creation  of a new tax or
charge,  or any other cause) an alternate or additional tax or charge (i) on the
value,  use or occupancy of the Premises or Landlord's  interest therein or (ii)
on or measured by the gross  receipts,  income or rentals from the Premises,  on
Landlord's  business  of leasing  the  Premises,  or computed in any manner with
respect to the operation of the Premises,  then any such tax or charge,  however
designated,  shall be  included  within the  meaning of the term "Real  Property
Taxes"  for  purposes  of this  Lease.  If any Real  Property  Tax is based upon
property or rents  unrelated to the  Premises,  then only that part of such Real
Property Tax that is fairly  allocable to the Premises shall be included  within
the meaning of the term "Real Property  Taxes".  Notwithstanding  the foregoing,
the term "Real Property  Taxes" shall not include estate,  inheritance,  gift or
franchise  taxes of  Landlord  or the federal or state net income tax imposed on
Landlord's income from all sources. See Paragraph 53

   B. Taxes on Tenant's  Property.  Tenant shall be liable for and shall pay ten
days before  delinquency,  taxes levied  against any personal  property or trade
fixtures  placed  by  Tenant  in or about  the  Premises.  If any such  taxes on
Tenant's  personal  property or trade  fixtures are levied  against  Landlord or
Landlord's property or if the assessed value of the Premises is increased by the
inclusion  therein  of a value  placed  upon  such  personal  property  or trade
fixtures of Tenant and if Landlord,  after  written  notice to Tenant,  pays the
taxes based on such increased assessment, which Landlord shall have the right to
do  regardless  of the  validity  thereof,  but only  under  proper  protest  if
requested  by Tenant,  Tenant  shall upon  demand,  as the case may be, repay to
Landlord the taxes so levied against  Landlord,  or the proportion of such taxes
resulting from such increase in the assessment;  provided that in any such event
Tenant shall have the right,  in the name of Landlord and with  Landlord's  full
cooperation, to bring suit in any court of competent jurisdiction to recover the
amount of such taxes so paid under  protest,  and any amount so recovered  shall
belong to Tenant.

10. LIABILITY  INSURANCE Tenant,  at Tenant's  expense,  agrees to keep in force
during the term of this Lease a policy of commercial general liability insurance
with  combined  single  limit  coverage  of not less  than Two  Million  Dollars
($2,000,000) per occurrence, for bodily injury and property damage occurring in,
on or about the Premises, including parking and landscaped areas. Such insurance
shall be primary  and  noncontributory  as  respects  any  insurance  carried by
Landlord. The policy or policies effecting such insurance shall name Landlord as
additional insureds,  and shall insure any liability of Landlord,  contingent or
otherwise,  as respects  acts or omissions of Tenant,  its agents,  employees or
invitees or otherwise by any conduct or  transactions  of any of said persons in
or about or concerning the Premises,  including any failure of Tenant to observe
or perform any of its  obligations  hereunder;  shall be issued by an  insurance
company  admitted to transact  business  in the State of  California;  and shall
provide that the insurance  effected thereby shall not be canceled,  except upon
thirty (30) days' prior written  notice to Landlord.  A certificate of insurance
of said policy  shall be  delivered  to  Landlord.  If,  during the term of this
Lease, in the considered  opinion of Landlord's Lender,  insurance  advisor,  or
counsel, the amount of insurance described in this Paragraph 10 is not adequate,
Tenant agrees to increase said coverage to such reasonable  amount as Landlord's
Lender, insurance advisor, or counsel shall deem adequate.

11. TENANT'S PERSONAL PROPERTY  INSURANCE AND WORKMAN'S  COMPENSATION  INSURANCE
Tenant shall maintain a policy or policies of fire and property damage insurance
in "all risk" form with a sprinkler  leakage  endorsement  insuring the personal
property,  inventory,  trade  fixtures,  and leasehold  improvements  within the
leased Premises for the full replacement value thereof. The proceeds from any of
such  policies  shall be used for the  repair or  replacement  of such  items so
insured.

   Tenant  shall also  maintain a policy or policies of  workman's  compensation
insurance and any other employee benefit insurance sufficient to comply with all
laws.

12.  PROPERTY  INSURANCE  Landlord  shall  purchase  and keep in  force,  and as
Additional Rent and in accordance with Paragraph 4D of this Lease,  Tenant shall
pay to  Landlord  (or  Landlord's  agent if so directed  by  Landlord)  Tenant's
proportionate share (allocated to the leased Premises by square footage or other
equitable  basis as calculated and determined by Landlord) of the deductibles on
insurance claims and the cost of, policy or policies of insurance  covering loss
or damage  to the  Premises  (excluding  routine  maintenance  and  repairs  and
incidental  damage or  destruction  caused by accidents  or vandalism  for which
Tenant is responsible  under Paragraph 7) in the amount of the full  replacement
value thereof,  providing  protection  against those perils  included within the
classification of "all risks" insurance and flood and/or  earthquake  insurance,
if  available,  plus a policy of rental  income  insurance  in the amount of one
hundred  (100%)  percent of twelve  (12) months  Basic  Rent,  plus sums paid as
Additional  Rent. If such insurance cost is increased due to Tenant's use of the
Premises,  Tenant  agrees to pay to  Landlord  the full  cost of such  increase.
Tenant shall have no interest in nor any right to the proceeds of any  insurance
procured by Landlord for the Premises.

   Landlord  and Tenant do each hereby  respectively  release the other,  to the
<PAGE>

extent of insurance coverage of the releasing party, from any liability for loss
or damage caused by fire or any of the extended coverage  casualties included in
the releasing party's insurance policies, irrespective of the cause of such fire
or casualty; provided, however, that if the insurance policy of either releasing
party  prohibits  such  waiver,  then this waiver  shall not take  effect  until
consent to such waiver is obtained. If such waiver is so prohibited, the insured
party affected shall promptly notify the other party thereof.

13.  INDEMNIFICATION  Landlord  shall not be liable to Tenant and Tenant  hereby
waives all claims  against  Landlord for any injury to or death of any person or
damage to or  destruction  of property  in or about the  Premises by or from any
cause whatsoever,  including, without limitation, gas, fire, oil, electricity or
leakage of any character from the roof, walls,  basement or other portion of the
Premises  but  excluding,  however,  the willful  misconduct  or  negligence  of
Landlord,  its agents,  servants,  employees,  invitees, or contractors of which
negligence  Landlord has knowledge and reasonable time to correct.  Except as to
injury to persons or damage to property to the extent  arising  from the willful
misconduct  or the  negligence  of Landlord,  its agents,  servants,  employees,
invitees or contractors,  and subject to the last two sentences of Paragraph 12,
Tenant shall hold Landlord harmless from and defend Landlord against any and all
expenses, including reasonable attorneys' fees, in connection therewith, arising
out of any  injury to or death of any  person or  damage  to or  destruction  of
property occurring in, on or about the Premises,  or any part thereof,  from any
cause whatsoever.

14. COMPLIANCE Tenant, at its sole cost and expense,  shall promptly comply with
all  laws,   statutes,   ordinances  and  governmental  rules,   regulations  or
requirements  now or hereafter in effect;  with the requirements of any board of
fire underwriters or other similar body now or hereafter  constituted;  and with
any  direction or  occupancy  certificate  issued  pursuant to law by any public
officer; provided, however, that no such failure shall be deemed a breach of the
provisions  if Tenant,  immediately  upon  notification,  commences to remedy or
rectify said failure. The judgment of any court of competent jurisdiction or the
admission of Tenant in any action against  Tenant,  whether  Landlord be a party
thereto or not,  that Tenant has  violated any such law,  statute,  ordinance or
governmental rule,  regulation,  requirement,  direction or provision,  shall be
conclusive of that fact as between  Landlord and Tenant.  Tenant  shall,  at its
sole cost and expese,  comply with any and all  requirements  pertaining to said
Premises,  of  any  insurance   orgainzation  or  company,   necessary  for  the
maintenance  of  reasonable  fire  and  public  liability   insurance   covering
requirements  pertaining  to said  Premises,  of any insurance  orgainzation  or
company,  necessary for the maintenance of reasonable fire and public  liability
insurance covering the Premises. See Paragraphs 44 and 52

15. LIENS Tenant shall keep the Premises  free from any liens arising out of any
work performed,  materials  furnished or obligation  incurred by Tenant.  In the
event that Tenant shall not, within ten (10) days following  Tenant's receipt of
notice of the imposition of such lien,  cause the same to be released of record,
Landlord  shall have, in addition to all other remedies  provided  herein and by
law,  the right,  but no  obligation,  to cause the same to be  released by such
means as it shall deem  proper,  including  payment of the claim  giving rise to
such lien. All sums paid by Landlord for such purpose, and all expenses incurred
by it in connection therewith,  shall be payable to Landlord by Tenant on demand
with interest at the prime rate of interest as quoted by the Bank of America.

16. ASSIGNMENT AND SUBLETTING Tenant shall not assign,  transfer, or hypothecate
the leasehold  estate under this Lease, or any interest  therein,  and shall not
sublet the Premises,  or any part thereof, or any right or privilege appurtenant
thereto, or suffer any other person or entity to occupy or use the Premises,  or
any  portion  thereof,  without,  in each  case,  the prior  written  consent of
Landlord which consent will not be unreasonably withheld. In the event Tenant is
allowed to  assign,  transfer  or sublet the whole or any part of the  Premises,
with the prior written

                                  page 4 of 8

<PAGE>

consent of  Landlord,  no  assignee,  transferee  or  subtenant  shall assign or
transfer this Lease, either in whole or in part, or sublet the whole or any part
of the  Premies,  without  also having  obtained  the prior  written  consent of
Landlord.  A consent of Landlord  to one  assignment,  transfer,  hypothecation,
subletting,  occupation or use by any other person shall not release Tenant from
any of  Tenant's  obligations  hereunder  or be deemed  to be a  consent  to any
subsequent   similar  or   dissimilar   assignment,   transfer,   hypothecation,
subletting,  occupation  or  use by  any  other  person.  Any  such  assignment,
transfer,  hypothecation,  subletting,  occupation  or use without  such consent
shall be void and shall  constitute  a breach of this Lease by Tenant and shall,
at the option of Landlord exercised by written notice to Tenant,  terminate this
Lease.  The leasehold  estate under this Lease shall not, nor shall any interest
therein,  be assignable  for any purpose by operation of law without the written
consent of  Landlord.  As a condition  to its consent,  Landlord  shall  require
Tenant to pay all reasonable  expenses in connection  with the  assignment,  and
Landlord shall require  Tenant's  assignee or transferee (or other  assignees or
transferees)  to assume in writing all of the  obligations  under this Lease and
for Tenant to remain liable to Landlord  under the Lease.  See Paragraphs 55 and
56

17.  SUBORDINATION  AND  MORTGAGES  In the event  Landlord's  title or leasehold
interest is now or hereafter encumbered by a deed of trust, upon the interest of
Landlord in the land and buildings in which the demised Premises are located, to
secure a loan from a lender  (hereinafter  referred to as "Lender") to Landlord,
Tenant  shall,  at the  request of  Landlord  or  Lender,  execute in writing an
agreement  subordinating its rights under this Lease to the lien of such deed of
trust,  or, if so  requested,  agreeing  that the lien of Lender's deed of trust
shall be or remain  subject and  subordinate  to the rights of Tenant under this
Lease.  Notwithstanding any such  subordination,  Tenant's possession under this
Lease shall not be  disturbed  if Tenant is not in default and so long as Tenant
shall pay all rent and observe and  perform all of the  provisions  set forth in
this Lease. See Paragraph 57

18. ENTRY BY LANDLORD Landlord reserves, and shall at all reasonable times have,
the right to enter the Premises to inspect  them;  to perform any services to be
provided by Landlord  hereunder;  to make  repairs or provide any  services to a
contiguous  tenant(s);   to  submit  the  Premises  to  prospective  purchasers,
mortgagers  or  tenants;  to post  notices of  nonresponsibility;  and to alter,
improve or repair the  Premises  or other  parts of the  building,  all  without
abatement of rent, and may erect  scaffolding and other necessary  structures in
or through the Premises where  reasonably  required by the character of the work
to be  performed;  provided,  however  that  the  business  of  Tenant  shall be
interfered with to the least extent that is reasonably  practical.  Any entry to
the Premises by Landlord  for the  purposes  provided for herein shall not under
any circumstances be construed or deemed to be a forcible or unlawful entry into
or a detainer of the Premises or an eviction, actual or constructive,  of Tenant
from the Premises or any portion thereof. See Paragraph 58

19.   BANKRUPTCY  AND  DEFAULT  The  commencement  of  a  bankruptcy  action  or
liquidation  action  or  reorganization   action  or  insolvency  action  or  an
assignment of or by Tenant for the benefit of creditors,  or any similar  action
undertaken by Tenant, or the insolvency of Tenant,  shall, at Landlord's option,
constitute  a breach  of this  Lease  by  Tenant.  If the  trustee  or  receiver
appointed to serve during a bankruptcy, liquidation, reorganization,  insolvency
or similar  action elects to reject  Tenant's  unexpired  Lease,  the trustee or
receiver  shall notify  Landlord in writing of its election  within  thirty (30)
days after an order for relief in a  liquidation  action or within  thirty  (30)
days after the commencement of any action.

   Within thirty (30) days after court approval of the assumption of this Lease,
the  trustee  or  receiver  shall cure (or  provide  adequate  assurance  to the
reasonable satisfaction of Landlord that the trustee or receiver shall cure) any
and all  previous  defaults  under the  unexpired  Lease  and  shall  compensate
Landlord for all actual pecuniary loss and shall provide  adequate  assurance of
future performance under said Lease to the reasonable  satisfaction of Landlord.
Adequate assurance of future performance,  as used herein,  includes,  but shall
not be  limited  to: (i)  assurance  of source  and  payment of rent,  and other
consideration  due under this  Lease;  (ii)  assurance  that the  assumption  or
assignment of this Lease will not breach  substantially  any provision,  such as
radius,  location,  use, or exclusivity provision,  in any agreement relating to
the above described Premises.

   Nothing contained in this section shall affect the existing right of Landlord
to refuse to accept an assignment  upon  commencement of or in connection with a
bankruptcy, liquidation, reorganization or insolvency action or an assignment of
Tenant for the benefit of creditors or other similar act.  Nothing  contained in
this Lease shall be construed as giving or granting or creating an equity in the
demised  Premises to Tenant.  In no event shall the leasehold  estate under this
Lease,  or any  interest  therein,  be  assigned  by  voluntary  or  involuntary
bankruptcy proceeding without the prior written consent of Landlord. In no event
shall  this Lease or any rights or  privileges  hereunder  be an asset of Tenant
under any bankruptcy, insolvency or reorganization proceedings.

   The failure to perform or honor any  covenant,  condition  or  representation
made  under this Lease  shall  constitute  a default  hereunder  by Tenant  upon
expiration of the appropriate grace period  hereinafter  provided.  Tenant shall
have a period of ten (10) days from the date of  written  notice  from  Landlord
within which to cure any default in the payment of rental or adjustment thereto.
Tenant  shall have a period of thirty (30) days from the date of written  notice
from Landlord  within which to cure any other default under this Lease.  Upon an
<PAGE>

uncured  default  of this  Lease by Tenant,  Landlord  shall have the  following
rights and  remedies in addition to any other  rights or remedies  available  to
Landlord at law or in equity:

      (a) The rights and remedies  provided for by California Civil Code Section
1951.2, including but not limited to, recovery of the worth at the time of award
of the  amount by which the  unpaid  rent for the  balance of the term after the
time of award  exceeds the amount of rental loss for the same period that Tenant
proves could be reasonably  avoided,  as computed  pursuant to subsection (b) of
said Section 1951.2.

      (b) The rights and  remedies  provided by  California  Civil Code  Section
which allows  Landlord to continue the Lease in effect and to enforce all of its
rights and remedies under this Lease,  including the right to recover rent as it
becomes  due,  for so long as  Landlord  does not  terminate  Tenant's  right to
possession; acts of maintenance or preservation,  efforts to relet the Premises,
or the  appointment  of a receiver  upon  Landlord's  initiative  to protect its
interest  under this Lease shall not  constitute a termination of Tenant's right
to possession.

      (c) The  right to  terminate  this  Lease by  giving  notice  to Tenant in
accordance with applicable law.

      (d) To the extent permitted by law, the right and power,  after compliance
with all  statutory  requirements  and in any event on not less  than  three (3)
business days prior written notice,  to enter the Premises and remove  therefrom
all persons  and  property,  to store such  property  in a public  warehouse  or
elsewhere  at the  cost of and for  the  account  of  Tenant,  and to sell  such
property and apply such proceeds  therefrom  pursuant to  applicable  California
law. Landlord, may from time to time sublet the Premises or any part thereof for
such term or terms (which may extend  beyond the term of this Lease) and at such
rent and such other terms as Landlord in its reasonable sole discretion may deem
advisable,  with the right to make alterations and repairs to the Premises. Upon
each  subletting,  (i) Tenant shall be  immediately  liable to pay Landlord,  in
addition to indebtedness  other than rent due hereunder,  the reasonable cost of
such subletting,  including, but not limited to, reasonable attorneys' fees, and
any real  estate  commissions  actually  paid,  and the cost of such  reasonable
alterations  and repairs  incurred by Landlord and the amount,  if any, by which
the rent hereunder for the period of such  subletting (to the extent such period
does not exceed the term  hereof)  exceeds the amount to be paid as rent for the
Premises for such period or (ii) at the option of Landlord,  rents received from
such  subletting  shall be applied first to payment of  indebtedness  other than
rent due hereunder from Tenant to Landlord;  second, to the payment of any costs
of such subletting and of such alterations and repairs; third to payment of rent
due and unpaid hereunder; and the residue, if any, shall be held by Landlord and
applied in payment of future rent as the same becomes due  hereunder.  If Tenant
has been credited with any rent to be received by such  subletting  under option
(i) and such rent shall not be promptly paid to Landlord by the subtenant(s), or
if such rentals received from such subletting under option (ii) during any month
be less than that to be paid during that month by Tenant hereunder, Tenant shall
pay any such  deficiency to Landlord.  Such  deficiency  shall be calculated and
paid  monthly.  No taking  possession  of the  Premises  by  Landlord,  shall be
construed  as an election on its part to  terminate  this Lease unless a written
notice of such intention be given to Tenant. Notwithstanding any such subletting
without termination,  Landlord may at any time hereafter elect to terminate this
Lease for such previous breach.

      (e) The right to have a receiver  appointed for Tenant upon application by
Landlord,  to take possession of the Premises and to apply any rental  collected
from the  Premises  and to exercise  all other  rights and  remedies  granted to
Landlord pursuant to subparagraph d. above. See Paragraph 59

20.  ABANDONMENT  Tenant  shall not vacate or abandon  the  Premises at any time
during the term of this Lease, and if Tenant shall abandon,  vacate or surrender
said  Premises,  or be  dispossessed  by the process of law, or  otherwise,  any
personal  property  belonging to Tenant and left on the Premises shall be deemed
to be  abandoned,  at the option of  Landlord,  except  such  property as may be
mortgaged to Landlord.

21. DESTRUCTION In the event the Premises are destroyed in whole or in part from
any cause, except for routine maintenance and repairs and incidental

                                  page 5 of 8

<PAGE>

damage and  destruction  caused from vandalism and accidents for which Tenant is
responsible under Paragraph 7, Landlord may, at its option:

      (a) Rebuild or restore the Premises to their condition prior to the damage
or destruction, or

      (b) Terminate this Lease.

   If Landlord  does not give Tenant  notice in writing  within thirty (30) days
from the  destruction  of the  Premises of its  election  to either  rebuild and
restore  them,  or to  terminate  this Lease,  Landlord  shall be deemed to have
elected to rebuild or restrore  them,  in which event  Landlord  agrees,  at its
expense, promptly to rebuild or restore the Premises to their condition prior to
the damage or destruction. Tenant shall be entitled to a reduction in rent while
such  repair  is being  made in the  proportion  that  the area of the  Premises
rendered untenantable by such damage bears to the total area of the Premises. If
Landlord  does not complete the  rebuilding  or  restoration  within one hundred
eighty (180) days following the date of  destruction  (such period of time to be
extended for delays  caused by the fault or neglect of Tenant or because of Acts
of God,  acts of  public  agencies,  labor  disputes,  strikes,  fires,  freight
embargos,  rainy or stormy weather,  inability to obtain materials,  supplies or
fuels,  acts of contractors or  subcontractors,  or delay of the  contractors or
subcontractors due to such causes or other  contingencies  beyond the control of
Landlord),  then Tenant shall have the right to  terminate  this Lease by giving
fifteen (15) days prior  written  notice to Landlord.  Notwithstanding  anything
herein to the  contrary,  Landlord's  obligation  to rebuild or restore shall be
limited to the  building and interior  improvements  constructed  by Landlord as
they  existed  as of the  commencement  date of the Lease and shall not  include
restoration  of  Tenant's  trade  fixtures,   equipment,   merchandise,  or  any
improvements,  alterations  or additions  made by Tenant to the Premises,  which
Tenant shall forthwith replace of fully repair at Tenant's sole cost and expense
provided this Lease is not cancelled according to the provisions above.

   Unless this Lease is terminated  pursuant to the foregoing  provisions,  this
Lease shall remain in full force and effect.  Tenant hereby expressly waives the
provisions of Section 1932, Subdivision 2, in Section 1933, Subdivision 4 of the
California Civil Code.

   In the event that the  building in which the Premises are situated is damaged
or  destroyed  to the extent of not less than  33-1/3% of the  replacement  cost
thereof,  Landloard may elect to terminate  this Lease,  whether the Premises be
injured or not. See Paragraph 61

22.  EMINENT  DOMAIN  If all or any part of the  Premises  shall be taken by any
public or quasi-public authority under the power of eminent domain or conveyance
in lieu thereof, this Lease shall terminate as to any portion of the Premises so
taken or conveyed on the date when title vests in the  condemnor,  and  Landlord
shall be entitled to any and all payment,  income,  rent, award, or any interest
therein  whatsoever  which may be paid or made in connection with such taking or
conveyance, and Tenant shall have no claim against Landlord or otherwise for the
value  of any  unexpired  term  of this  Lease.  Notwithstanding  the  foregoing
paragraph,  any compensation  specifically  awarded Tenant for loss of business,
Tenant's personal property, moving cost or loss of goodwill, shall be and remain
the property of Tenant.

   If any action or  proceeding  is commenced for such taking of the Premises or
any part  thereof,  or if  Landlord  is advised in writing by any entity or body
having  the right or power of  condemnation  of its  intention  to  condemn  the
premises or any portion thereof, then Landlord shall have the right to terminate
this Lease by giving Tenant written notice thereof within sixty (60) days of the
date of  receipt of said  written  advice,  or  commencement  of said  action or
proceeding,  or taking conveyance,  which termination shall take place as of the
first to occur of the last day of the calendar month next following the month in
which such notice is given or the date on which title to the Premises shall vest
in the condemmor.

   In the event of such a partial  taking or conveyance of the Premises,  if the
portion of the Premises taken or conveyed is so substantial  that the Tenant can
no longer  reasonably  conduct its business,  Tenant shall have the privilege of
terminating  this Lease  within  sixty (60) days from the date of such taking or
conveyance,  upon written notice to Landlord of its intention so to do, and upon
giving of such notice this Lease shall terminate on the last day of the calendar
month next  following  the month in which such notice is given,  upon payment by
Tenant of the rent from the date of such  taking  or  conveyance  to the date of
termination.

   If a portion of the Premises be taken by  condemnation  or conveyance in lieu
thereof and neither  Landlord nor Tenant shall  terminate this Lease as provided
herein, this Lease shall continue in full force and effect as to the part of the
Premises not so taken or conveyed,  and the rent herein shall be  apportioned as
of the date of such taking or conveyance so that  thereafter the rent be paid by
Tenant shall be in the ratio that the area of the portion of the Premises not so
taken or conveyed  bears to the total area of the Premises prior to such taking.
See Paragraph 62

23. SALE OR  CONVEYANCE  BY LANDLORD In the event of a sale or conveyance of the
Premises  or  any  interest  therein,   by  any  owner  of  the  reversion  then
constituting Landlord, the transferor shall thereby be released from any further
liability  upon any of the terms,  covenants or conditions  (express or implied)
herein contained in favor of Tenant, and in such event, insofar as such transfer
<PAGE>

is concerned, Tenant agrees to look soley to the responsibility of the successor
in interest of such transferor in and to the Premises and this Lease. This Lease
shall not be  affected  by any such sale or  conveyance,  and  Tenant  agrees to
attorn to the successor in interest of such transferor. See Paragraph 63

24. ATTORNMENT TO LENDER OR THIRD PARTY In the event the interest of Landlord in
the land and  buildings in which the leased  Premises are located  (whether such
interest  of  Landlord  is a fee title  interest  or a  leasehold  interest)  is
encumbered by deed of trust,  and such interest is acquired by the lender or any
third party through  judicial  foreclosure  or by exercise of a power of sale at
private  trustee's  foreclosure  sale,  Tenant  hereby  agrees  to attorn to the
purchaser at any such  foreclosure  sale and to recognize  such purchaser as the
Landlord  under this Lease.  In the event the lien of the deed of trust securing
the loan from a Lender to Landlord  is prior and  paramount  to the lease,  this
Lease shall  nonetheless  continue in full force and effect for the remainder of
the unexpired term hereof,  at the same rental herein  reserved and upon all the
other terms, conditions and covenants herein contained.

25.  HOLDING  OVER  Any  holding  over  by  Tenant  after  expiration  or  other
termination  of the term of this Lease  with the  written  consent  of  Landlord
delivered to Tenant shall not  constitute a renewal or extension of the Lease or
give Tenant any rights in or to the leased Premises except as expressly provided
in this Lease. Any holding over after the expiration or other termination of the
term of this Lease,  with the consent of  Landlord,  shall be  construed to be a
tenancy from month to month, on the same terms and conditions  herein  specified
insofar as  applicable  except that the monthly Basic Rent shall be increased to
an amount equal to one hundred  twenty five (125%)  percent of the monthly Basic
Rent required during the last month of the Lease term.

26.  CERTIFICATE  OF ESTOPPEL  Either party shall at any time upon not less than
ten (10) days prior written notice from the other party execute, acknowledge and
deliver to the requesting  party a statement in writing (i) certifying that this
Lease is unmodified  and in full force and effect (or, if modified,  stating the
nature of such  modification and certifying that this Lease, as so modified,  is
in full force and effect)  and the date to which the rent and other  charges are
paid in advance,  if any, and (ii) acknowledging that there are not, to the best
of such party's  knowledge,  any uncured defaults on the part of the other party
hereunder,  or specifying such defaults, if any, are claimed. Any such statement
may be conclusively relied upon by any prospective  purchaser or encumbrancer of
the Premises. A party's failure to deliver such statement within such time shall
be conclusive  upon the party  receiving such request that this Lease is in full
force and effect, without modification except as may be represented by Landlord;
that there are no uncured defaults in the requesting  party's  performance,  and
that not more than one month's rent has been paid in advance.

27.  CONSTRUCTION  CHANGES It is understood that the description of the Premises
and the location of ductwork,  plumbing and other facilities therein are subject
to such minor  changes as  Landlord or  Landlord's  architect  determines  to be
desirable in the course of  construction  of the  Premises,  and no such changes
shall affect this Lease or entitle  Tenant to any reduction of rent hereunder or
result in any  liability of Landlord to Tenant.  Landlord does not guarantee the
accuracy of any drawings  supplied to Tenant and verification of the accuracy of
such drawings rests with the Tenant.

28. RIGHT OF LANDLORD TO PERFORM All terms,  covenants  and  conditions  of this
Lease to be  performed  or observed by Tenant  shall be performed or observed by
Tenant at Tenant's  sole cost and expense and without any  reduction of rent. If
Tenant shall fail to pay any sum of money, or other rent, required to be paid by
it hereunder  and such failure  shall  continue for five (5) days after  written
notice thereof by Landlord,  or shall fail to perform any other term or covenant
hereunder  on its part to be  performed,  and such  failure  shall  continue for
thirty (30) days after written  notice  thereof by Landlord,  Landlord,  without
waiving or releasing  Tenant from any obligation of Tenant  hereunder,  may, but
shall not be obliged to, make any such payment or perform any such other term or
covenant on Tenant's part to be performed.  All sums so paid by Landlord and all
necessary costs of such  performance by Landlord  together with interest thereon
at the rate of the  prime  rate or  interest  per annum as quoted by the Bank of
America from the date of such payment on performance by Landlord,  shall be paid
(and Tenant  covenants to make such  payment) to Landlord on demand by Landlord,
and  Landlord  shall have (in addition to any other right or remedy of Landlord)
the same rights and remedies in the event of nonpayment by Tenant as in the case
of failure by Tenant in the payment of rent hereunder.

29. ATTORNEYS' FEES

   A. In the event that  either  Landlord  or Tenant  should  bring suit for the
possession of the Premises, for the recovery of any sum due under this Lease, or
because of the breach of any  provision  of this Lease,  or for any other relief
against  the other  party  hereunder,  then all costs  and  expenses,  including
reasonable attorneys' fees,

                                  page 6 of 8

<PAGE>

incurred by the prevailing party therein shall be paid by the other party, which
obligation on the part of the other party shall be deemed to have accrued on the
date of the commencement of such action and shall be enforceable  whether or not
the action is prosecuted to judgment.

   B. Should Landlord be named as a defendant in any suit brought against Tenant
in connection with or arising out of Tenant's occupancy hereunder,  Tenant shall
pay to  Landlord  its costs and  expenses  incurred  in such suit,  including  a
reasonable attorney's fee.

30. WAIVER The waiver by either party of the other party's failure to perform or
observe any term,  covenant or  condition  herein  contained  to be performed or
observed by such waiving  party shall not be deemed to be a waiver of such term,
covenant  or  condition  or of any  subsequent  failure of the party  failing to
perform  or  observe  the same or any other such  term,  covenant  or  condition
therein  contained,  and no custom or  practice  which may  develop  between the
parties hereto during the term hereof shall be deemed a waiver of, or in any way
affect,  the right of either party to insist upon  performance and observance by
the other party in strict accordance with the terms hereof.

31. NOTICES All notices, demands, requests, advices or designations which may be
or are required to be given by either party to the other  hereunder  shall be in
writing. All notices, demands,  requests, advices or designations by Landlord to
Tenant shall be sufficiently  given,  made or delivered if personally  served on
Tenant by leaving the same at the Premises of if sent by United States certified
or registered mail,  postage prepaid,  addressed to Tenant at the Premises.  All
notices, demands,  requests, advices or designations by Tenant to Landlord shall
be  sent by  United  States  certified  or  registered  mail,  postage  prepaid,
addressed to Landlord at its offices at  Peery/Arrillaga,  2560 Mission  College
Blvd., Suite 101, Santa Clara, CA 95054. Each notice, request, demand, advice or
designation  referred to in this paragraph  shall be deemed received on the date
of the personal service or mailing thereof in the manner herein provided, as the
case may be.

32.  EXAMINATION  OF LEASE  Submission of this  instrument  for  examination  or
signature by Tenant does not  constitute a reservation of or option for a lease,
and this instrument is not effective as a lease or otherwise until its execution
and delivery by both Landlord and Tenant.

33. DEFAULT BY LANDLORD  Landlord shall not be in default unless  Landlord fails
to perform obligations  required of Landlord within a reasonable time, but in no
event earlier than (30) days after  written  notice by Tenant to Landlord and to
the holder of any first  mortgage or deed of trust  covering the Premises  whose
name and address  shall have  heretofore  been  furnished  to Tenant in writing,
specifying  wherein Landlord has failed to perform such  obligations;  provided,
however,  that if the nature of  Landlord's  obligations  is such that more than
thirty (30) days are required for  performance,  then  Landlord  shall not be in
default if Landlord commences performance within such thirty (30) day period and
thereafter diligently prosecutes the same to completion.

34.  CORPORATE  AUTHORITY If Tenant is a corporation  (or a  partnership),  each
individual  executing this Lease on behalf of said  corporation (or partnership)
represents  and warrants that he is duly  authorized to execute and deliver this
Lease on behalf of said  corporation  (or  partnership)  in accordance  with the
by-laws of said  corporation  (or partnership in accordance with the partnership
agreement) and that this Lease is binding upon said corporation (or partnership)
in accordance with its terms. If Tenant is a corporation,  Tenant shall,  within
thirty (30) days after execution of this Lease,  deliver to Landlord a certified
copy of the resolution of the Board of Directors of said corporation authorizing
or ratifying the execution of this Lease.

35. [DELETED]

36. LIMITATION OF LIABILITY In consideration of the benefits accruing hereunder.
Tenant and all successors  and assigns  covenant and agree that, in the event of
any actual or alleged failure, breach or default hereunder by Landlord:

      (a) the sole and exclusive remedy shall be against Landlord's  interest in
the Premises leased herein;

      (b) no partner of  Landlord  shall be sued or named as a party in any suit
or  action  (except  as  may  be  necessary  to  secure   jurisdiction   of  the
partnership);

      (c) no service of process  shall be made  against  any partner of Landlord
(except as may be necessary to secure jurisdiction of the partnership);

      (d) no partner of Landlord shall be required to answer or otherwise  plead
to any service of process;

      (e) no judgment will be taken against any partner of Landlord;

      (f) any judgment  taken against any partner of Landlord may be vacated and
set aside at any time without hearing;

      (g) no writ of  execution  will ever by levied  against  the assets of any
partner of Landlord;

      (h) these  covenants and agreements are  enforceable  both by Landlord and
also by any partner of Landlord.
<PAGE>

   Tenant agrees that each of the foregoing  covenants and  agreements  shall be
applicable to any covenant or agreement either expressly contained in this Lease
or imposed by statute or at common law.

37.  SIGNS No sign,  placard,  picture,  advertisement,  name or notice shall be
inscribed,  displayed  or printed or affixed on or to any part of the outside of
the Premises or any exterior windows of the Premises without the written consent
of Landlord  first had and obtained and Landlord  shall have the right to remove
any such sign, placard, picture, advertisement, name or notice without notice to
and at the  expense of Tenant.  If Tenant is allowed to print or affix or in any
way place a sign in, on, or about the Premises,  upon expiration or other sooner
termination  of this Lease,  Tenant at Tenant's sole cost and expense shall both
remove  such sign and  repair  all  damage in such a manner  as to  restore  all
aspects  of  the  appearance  of the  Premises  to the  condition  prior  to the
placement of said sign.

   All approved  signs or lettering on outside doors shall be printed,  painted,
affixed or inscribed at the expense of Tenant by a person reasonably approved of
by Landlord.

   Tenant shall not place anything or allow anything to be placed near the glass
of any window,  door  partition or wall which may appear  unsightly from outside
the Premises.

38. MISCELLANEOUS AND GENERAL PROVISIONS

   A. Use of Building  Name.  Tenant shall not,  without the written  consent of
Landlord, use the name of the building for any purpose other than as the address
of the business conducted by Tenant in the Premises.

                                  page 7 of 8

<PAGE>

   B. Choice of Law; Severability.  This Lease shall in all respects be governed
by and construed in accordance with the laws of the State of California.  If any
provision of this Lease shall be invalid,  unenforceable  or ineffective for any
reason whatsoever, all other provisions hereof shall be and remain in full force
and effect.

   C. Definition of Terms. The term "Premises"  includes the space leased hereby
and any improvements now or hereafter installed therein or attached thereto. The
term "Landlord" or any pronoun used in place thereof includes the plural as well
as the singular and the successors and assigns of Landlord. The term "Tenant" or
any pronoun  used in place  thereof  includes the plural as well as the singular
and individuals,  firms, associations,  partnerships and corporations, and their
and each of their respective heirs,  executors,  administrators,  successors and
permitted  assigns,  according to the context hereof, and the provisions of this
Lease  shall   inure  to  the  benefit  of  and  bind  such  heirs,   executors,
administrators, successors and permitted assigns.

   The  term  "person"   includes  the  plural  as  well  as  the  singular  and
individuals, firms, associations,  partnerships and corporations.  Words used in
any  gender  include  other  genders.  If  there  be  more  than on  Tenant  the
obligations of Tenant hereunder are joint and several. The paragraph headings of
this Lease are for  convenience  of reference only and shall have no effect upon
the construction or interpretation of any provision hereof.

   D. Time of Essence.  Time is of the essence of this Lease and of each and all
of its provisions.

   E. Quitclaim.  At the expiration or earlier termination of this Lease, Tenant
shall execute,  acknowledge and deliver to Landlord,  within ten (10) days after
written  demand from Landlord to Tenant,  any quitclaim  deed or other  document
required  by any  reputable  title  company,  licensed to operate in the Sate of
California,  to remove the cloud or  encumbrance  created by this Lease from the
real property of which Tenant's Premises are a part.

   F. Incorporation of Prior Agreements;  Amendments. This instrument along with
any exhibits and attachments  hereto  constitutes the entire  agreement  between
Landlord and Tenant relative to the Premises and this agreement and the exhibits
and  attachments  may be altered,  amended or revoked only by an  instrument  in
writing  signed by both  Landlord  and Tenant.  Landlord and Tenant agree hereby
that all prior or  contemporaneous  oral agreements between and among themselves
and their agents or representatives  relative to the leasing of the Premises are
merged in or revoked by this agreement.

   G. Recording. Landlord and Tenant shall record a short form memorandum hereof
in the form attached hereto as Exhibit C.

   H. Amendments for Financing.  Tenant further agrees to execute any reasonable
amendments required by a lender to enable Landlord to obtain financing,  so long
as Tenant's rights hereunder are not materially  affected and there is no change
in the Basic Rent, Options to Renew,  Lease Term or Construction  obligations of
Landlord.

   I. Additional  Paragraphs.  Paragraphs 39 through 65 are added hereto and are
included as a part of this lease.

   J. Clauses,  Plats and Riders.  Clauses,  plats and riders, if any, signed by
Landlord and Tenant and endorsed on or affixed to this Lease are a part hereof.

   K.  Diminution  of Light,  Air or View.  Tenant  covenants and agrees that no
diminution or shutting off of light,  air or view by any structure  which may be
hereafter  erected  (whether  or not by  Landlord)  shall in any way  affect his
Lease,  entitle  Tenant  to any  reduction  of rent  hereunder  or result in any
liability of Landlord to Tenant.

   IN WITNESS  WHEREOF,  Landlord and Tenant have  executed and  delivered  this
Lease as of the day and year last written below.

LANDLORD:

JOHN ARRILLAGA SURVIVOR'S TRUST


By   /s/  John Arrillaga
     -------------------------------
     John Arrillaga, Trustee

Date:          6/30/97
     --------------------------------

RICHARD T. PEERY SEPARATE PROPERTY TRUST

By   /s/  Richard T. Peery
     --------------------------------
     Richard T. Peery, Trustee

Date:          6/26/97
     --------------------------------
<PAGE>


TENANT:

QUANTUM CORPORATION
a Delaware corporation


By   /s/  Andrew Kryder
     ---------------------------------
     Andrew Kryder,
     Vice President Finance and
     Corporate General Counsel

Date:          June 25, 1997
     ---------------------------------

By   /s/  Norm Claus
     ----------------------------------
     Norm Claus,
     Vice President Real Estate and
     Corporate Services

Date:          June 25, 1997
     ----------------------------------

                                  page 8 of 8

<PAGE>
Paragraphs 39 through 65 to Lease Agreement dated April 16, 1997, By and Between
THE JOHN ARRILLAGA  SURVIVOR'S TRUST AND THE RICHARD T. PEERY SEPARATE PROPERTY,
as Landlord,  and QUANTUM  CORPORATION,  a Delaware  corporation,  as Tenant for
182,355+/- Square Feet of Space Located on Sumac Drive, Milpitas, California.

39. BASIC RENT: In accordance  with  Paragraph 4A, and subject to the provisions
of  Paragraphs  40 and 41,  Basic Rent  shall be  payable as follows  during the
indicated  months of the term of the  Lease based upon the gross  leasable  area
within the building that is part of the Premises:

        Period                                               Monthly Basic Rent
        ------                                               ------------------

        Months 1-12
        (plus the partial calendar month, 
        if any, following the Commencement Date *)
        
        $1.60/sf
        
        Months 13-24                                               $1.65/sf
        
        Months 25-36                                               $1.70/sf
        
        Months 37-48                                               $1.75/sf
        
        Months 49-60                                               $1.80/sf
        
        Months 61-72                                               $1.85/sf
        
        Months 73-84                                               $1.90/sf
        
        Months 85-96                                               $1.95/sf
        
        Months 97-108                                              $2.00/sf
        
        Months 109-120                                             $2.05/sf
        
        Months 121-132                                             $2.10/sf
        
        Months 133-144                                             $2.15/sf
        
        Months 145-156                                             $2.20/sf
        
        Months 157-168                                             $2.25/sf
        
        Months 169-180                                             $2.30/sf
        
        
         Example  of  calculation  of  Basic  Rent  per  month  for  the  period
commencing with the first through the twelfth months of said Lease:

        Square footage of Building                         182,355
        Per square foot Basic Monthly Rent             x     $1.60
                                                       -----------

        Basic Rent per Month                           $291.768.00
                                                       ===========

         * It is agreed in the event said Lease  commences  on a date other than
the first day of the month the Term of the Lease will be extended to account for
the number of days in the partial  month.  The Basic Rent  during the  resulting
partial month will be pro-rated (for the number of days in the partial month) at
the Basis  Rent rate  scheduled  for the  projected  Commencement  Date as shown
above.

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                                     Page 2

40. LEASE TERM AND  COMMENCEMENT  DATE: The following  provisions  relate to the
commencement and duration of the term of this Lease:

         A.  Lease  Term:   The  term  of  this  Lease  shall  commence  on  the
"Commencement  Date" (as defined  herein)  which is projected to be May 1, 1998,
and shall continue for a period of fifteen (15) years plus the partial  calendar
month, if any, in which the  Commencement  Date occurs,  subject to the terms of
this  Lease  and  subject  to (i)  earlier  termination  rights of  Landlord  in
accordance with the provisions of this Lease, and (ii) extension pursuant to the
options to renew  granted by  Paragraphs  41 and 42 and the  provisions  of this
Paragraph 40.C.

         B. Commencement Date Defined:  As used herein,  the term  "Commencement
Date"  shall mean the later to occur of the  following:  (i) the date upon which
the "Improvements" are "Substantially Completed" or (ii) May 1, 1998, subject to
(a) delays caused by Tenant and/or  Tenant's  agents and (b) provided,  however,
that if prior to the later of such dates Tenant's operating personnel enter into
occupancy of the Premises and commence the operation of Tenant's business within
the Premises,  the Commencement  Date shall be the date such personnel of Tenant
so enter into  occupancy of the  Premises.  The term  "Substantially  Completed"
and/or  "Substantial  Completion"  shall mean the date when all of the following
have occurred with respect to the Improvements in question: (i) the construction
of the Improvements in question has been  substantially  completed in accordance
with the  approved  plans  therefor  except for punch  list  items  which do not
prevent Tenant from reasonably using the Premises to conduct Tenant's  business;
(ii)  Landlord has executed a  certificate  or statement  representing  that the
Improvements  in  question,  for  which  Landlord  is  responsible,   have  been
substantially completed in accordance with the plans and specifications therefor
except for the punch list items  which do not  prevent  Tenant  from  reasonably
using the  Premises  to  conduct  Tenant's  business;  and  (iii)  the  Building
Department of the City of Milpitas has  completed  its final  inspection of such
Improvements  and has "signed off" the building  inspection  card approving such
work as complete  except for punch list items  which do not prevent  Tenant from
reasonably using the Premises to conduct Tenant's business.  Notwithstanding the
foregoing,  Substantial  Completion  of the Interior  Improvements  shall not be
deemed  to have  occurred  until  Landlord  has  obtained  final or  conditional
approval from the Fire Department of the City of Milpitas that the  Improvements
have been completed in accordance with such department's  requirements  (subject
only to conditions that do not prevent Tenant from occupying the Improvements).

         C. Lease Terms  Co-extensive:  It is acknowledged that (i) Landlord has
granted Tenant,  pursuant to a separate Option  Agreement of even date herewith,
an Option to Lease an additional building on the parcel adjacent to the Premises
(the  "Building 7 Lease"),  and (ii) it is the intention of the parties that the
Term of this Lease be co-extensive  with the term of the Building 7 Lease,  such
that the terms of both leases  ("the  Leases")  expire on the same date.  In the
event Tenant exercises its Option to Lease Building 7 (pursuant to the terms and
conditions of the Option Agreement), it is hereby agreed that following the date
upon which the Commencement Date of the Building 7 Lease becomes  established as
a date certain  following  completion of  improvements  and  satisfaction of any
other conditions  related to determining such date, the Term of this Lease shall
be extended such that the  scheduled  Termination  Date of this Lease  coincides
with the  scheduled  termination  date of the  Building 7 Lease.  As soon as the
parties are able to  implement  the  provisions  of this  Paragraph  because the
Commencement  Date  of the  Building  7  Lease  has  been  determined  following
completion of improvements and satisfaction of other appropriate conditions, the
parties  shall execute an amendment to this Lease (i) extending the initial Term
of this Lease (if  necessary) to be  co-terminous  with the initial  termination
date  of the  Building  7  Lease  and  (ii)  adjusting  the  Options  to  Extend
accordingly.  The monthly Basic Rent on this Lease during the  Extension  Period
shall be  increased  by $.05 per square  foot on the  commencement  date of said
Extension Period. For example, if the Building 7 Lease commences on May 1, 2004,
and this Lease  commences the scheduled  Commencement  Date of May 1, 1998,  the
initial Term of this Lease shall be extended by one year and the per square foot
monthly Basic Rent during the  Extension  Period shall be $2.35 per square foot.
The  provisions  of this  Paragraph  40C also  requires the terms of both of the
Leases to be extended accordingly if Tenant exercises its Option to Extend under
either of the Leases. The monthly Basic Rent during the extended term under each
of the Leases  shall be  increased  by $.05 per square foot on the  commencement
date of the extended term and  thereafter on each and every  anniversary  of the
respective lease Commencement Date.

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                                     Page 3

41. FIRST FIVE-YEAR OPTION TO EXTEND: Landlord hereby grants to Tenant an option
to extend the term of this Lease for an additional five (5) year period upon the
following terms and conditions:

         A. If Tenant elects to exercise the option to extend, Tenant shall give
Landlord  written notice of Tenant's  exercise of this option to extend at least
one hundred  eighty (180) days prior to the expiration of the Basic Term hereof,
in which event the Lease shall be considered extended for an additional five (5)
year  period  upon the same terms and  conditions  as this  Lease,  absent  this
Paragraph  41 and  subject to the rental as set forth  below.  In the event that
Tenant fails to timely exercise  Tenant's option as set forth herein in writing,
Tenant  shall have no  further  option to extend  this  Lease or the  Building 7
Lease,  and this  Lease  shall  continue  in full  force and effect for the full
remaining term hereof, absent this Paragraph 41.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

            Period                                   Monthly Basic Rent
            ------                                   ------------------
            
            Months 1-12                                    $2.35/sf
            Months 13-24                                   $2.40/sf
            Months 25-36                                   $2.45/sf
            Months 37-48                                   $2.50/sf
            Months 49-60                                   $2.55/sf

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to renew  granted by this  Paragraph 41 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 41 notwithstanding such non-curable default.

42. SECOND  FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the Lease
for an additional  five (5) year period as set forth in Paragraph  41,  Landlord
hereby  grants to Tenant  an  option  to  extend  the Term of this  Lease for an
additional five (5) year period upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration  of the Lease term as  extended  pursuant to  Paragraph  41, in which
event the Lease shall be  considered  extended for an  additional  five (5) year
period upon the same terms and  conditions as this Lease,  absent this Paragraph
42.A and  subject to the  Rental as set forth  below.  In the event that  Tenant
fails to timely exercise Tenant's option as set forth herein in writing,  Tenant
shall have no further  option to extend this Lease or the Building 7 Lease,  and
this Lease shall  continue in full force and effect for the full  remaining term
hereof, absent this Paragraph 42.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

             Period                           Monthly Basic Rent
             ------                           ------------------
             
             Months 1-12                          $2.60/sf  
             Months 13-24                         $2.65/sf  
             Months 25-36                         $2.70/sf  
             Months 37-48                         $2.75/sf  
             Months 49-60                         $2.80/sf  
                                                            
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         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this Paragraph 42 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 42 notwithstanding such non-curable default.


43.  ASSESSMENT  CREDITS:  The demised  property  herein is subject to a special
assessment  levied by the City of Milpitas in Improvement  District No. 12. As a
part of said  special  assessment  proceedings,  additional  bonds were sold and
assessments levied to provide for construction  contingencies and reserve funds.
Interest will be earned on such funds created for  contingencies  and on reserve
funds which will be credited for the benefit of said assessment district. To the
extent surpluses are created in said district through unused  contingency funds,
interest  earnings or reserve funds, such surpluses shall be deemed the property
of Landlord.  Notwithstanding that such surpluses may be credited on assessments
otherwise  due against the demised  premises,  Tenant shall pay to Landlord,  as
additional  rent if, and at the time of any such credit of surpluses,  an amount
equal to all such surpluses so credited.

44.  HAZARDOUS  MATERIALS:  Landlord and Tenant agree as follows with respect to
the existence or use of "Hazardous  Materials" (as defined herein) on, in, under
or about the Premises and real property  located  beneath said  Premises,  which
includes the entire parcel of land on which the Premises are located as shown in
Green on Exhibit A attached hereto (hereinafter  collectively referred to as the
"Property"):

         A. As used  herein,  the  term  "Hazardous  Materials"  shall  mean any
material,  waste,  chemical,  mixture  or  byproduct  which is or  hereafter  is
defined,  listed or designated  under  Environmental  Laws (defined  below) as a
pollutant, or as a contaminant,  or as a toxic or hazardous substance,  waste or
material,  or  any  other  unwholesome,   hazardous,  toxic,  biohazardous,   or
radioactive material, waste, chemical, mixture or byproduct, or which is listed,
regulated or restricted by any Environmental Law (including, without limitation,
petroleum  hydrocarbons or any distillates or derivatives or fractions  thereof,
polychlorinated biphenyls, or asbestos). As used herein, the term "Environmental
Laws" shall mean any applicable Federal, State of California or local government
law  (including  common law),  statute,  regulation,  rule,  ordinance,  permit,
license,  order,  requirement,  agreement,  or approval,  or any  determination,
judgment,  directive,  or order of any  executive  or judicial  authority at any
level of Federal,  State of California or local government (whether now existing
or subsequently adopted or promulgated)  relating to pollution or the protection
of the environment, ecology, natural resources, or public health and safety.

         B. Tenant shall notify Landlord prior to the occurrence of any Tenant's
Hazardous  Materials  Activities  (defined below).  Landlord  acknowledges  that
Tenant shall use, in compliance with applicable  Environmental  Laws,  customary
household and office supplies  (Tenant shall first provide  Landlord with a list
of said materials use), such as mild cleaners,  lubricants and copier toner. Any
and all of  Tenant's  Hazardous  Materials  Activities  shall  be  conducted  in
conformity with this Paragraph 44, Paragraph 14 of this Lease, and in compliance
with all Environmental Laws and regulations.  As used herein, the term "Tenant's
Hazardous   Materials   Activities"  shall  mean  any  and  all  use,  handling,
generation, storage, disposal, treatment, transportation, release, discharge, or
emission of any Hazardous  Materials on, in, beneath,  to, from, at or about the
Property,  in connection  with Tenant's use of the Property,  or by Tenant or by
any of Tenant's agents, employees,  contractors,  vendors, invitees, visitors or
its future subtenants or assignees or other third parties  (including  "dumping"
by  others)  (or which  Hazardous  Materials  originate  on the  surface  of the
Premises  any time  after  November  1, 1995,  the date of the Option  Agreement
related to said  Lease,  and before the  Commencement  Date of this  Lease,  but
excluding  Hazardous  Materials on the Premises prior to the Lease  Commencement
Date because of the storage,  use, disposal, or transportation of such materials
or  waste  by  any  of  Landlord's  contractors  or  otherwise  arising  out  of
construction  work  performed  by or under  the  direction  of  Landlord  on the
Premises and Landlord shall be responsible for all required actions with respect
to such materials or wastes). Tenant agrees to provide Landlord with prompt

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written  notice of any spill or release of  Hazardous  Materials at the Property
during the term of the Lease of which Tenant becomes  aware,  and further agrees
to provide Landlord with prompt written notice of any violation of Environmental
Laws in connection with Tenant's Hazardous Materials  Activities of which Tenant
becomes aware. If Tenant's  Hazardous  Materials  Activities  involve  Hazardous
Materials  other than normal use of  customary  household  and office  supplies,
Tenant also agrees at Tenant's expense:  (i) to install such Hazardous Materials
monitoring,  storage and containment devices as may be required by Environmental
Laws,  regulations  and/or governing  agencies;  (ii) to provide Landlord with a
written inventory of such Hazardous Materials,  including an update of same each
year  upon  the  anniversary  date  of  the  Commencement   Date  of  the  Lease
("Anniversary  Date"); and (iii) on each Anniversary Date to provide to Landlord
copies of all  documentation and records,  required by applicable  Environmental
Laws to be prepared and submitted to governmental  authorities,  relating to use
at the  Property  of  Hazardous  Materials  or to Tenant's  Hazardous  Materials
Activities,   if  any.  If  upon   completion  of  Landlord's   review  of  said
documentation  and  records,  Landlord  reasonably  questions  if  Tenant  is in
compliance  with all  applicable  Environmental  Laws with  respect to  Tenant's
Hazardous Materials Activities,  Tenant agrees within thirty (30) days following
receipt of written  notice from  Landlord,  to retain a qualified  environmental
consultant,  acceptable to Landlord, to evaluate whether Tenant is in compliance
with all  applicable  Environmental  Laws with  respect  to  Tenant's  Hazardous
Materials Activities.  Tenant, at its expense, shall submit to Landlord a report
from  such   environmental   consultant   which   discusses  the   environmental
consultant's findings within two (2) months of each Anniversary Date. Tenant, at
its expense,  shall promptly undertake and complete any and all steps necessary,
and in full compliance with applicable  Environmental Laws, to fully correct any
and all problems or deficiencies identified by the environmental consultant, and
promptly provide Landlord with documentation of all such corrections.

         C. Prior to  termination  or  expiration of the Lease,  Tenant,  at its
expense,  shall (i) properly  remove from the Property all  Hazardous  Materials
which come to be located at the Property in connection  with Tenant's  Hazardous
Materials  Activities,  and (ii) fully  comply with and  complete  all  facility
closure  requirements  of  applicable   Environmental  Laws  regarding  Tenant's
Hazardous  Materials  Activities,  including  but not  limited  to (x)  properly
restoring  and  repairing  the  Property to the extent  damaged by such  closure
activities,   and  (y)  obtaining  from  the  local  Fire  Department  or  other
appropriate  governmental authority with any legal or regulatory  jurisdiction a
written   concurrence  that  closure  has  been  completed  in  compliance  with
applicable  Environmental  Laws.  Tenant shall  promptly  provide  Landlord with
copies of any claims,  notices, work plans, data and reports prepared,  received
or submitted in connection with any such closure activities.

         D. If Landlord,  upon  consultation with Tenant,  reasonably  concludes
that the  Property  has become  contaminated  as a result of Tenant's  Hazardous
Materials Activities, Landlord in addition to any other rights it may have under
this  Lease or  under  Environmental  Laws or other  laws,  may  enter  upon the
Property  and conduct  inspection,  sampling  and  analysis,  including  but not
limited to obtaining  and  analyzing  samples of soil and  groundwater,  for the
purpose of determining the nature and extent of such contamination except to the
extent that such  activities may be inconsistent  with Tenant's  compliance with
Environmental  Laws. Tenant shall promptly  reimburse  Landlord for the costs of
such an investigation,  including but not limited to reasonable  attorneys' fees
Landlord incurs with respect to such  investigation  to the extent,  and only to
the extent, that it that discloses  Hazardous Materials  contamination for which
Tenant is liable  under  this  Lease.  Except  as may be  required  of Tenant by
applicable  Environmental Laws, Tenant shall not perform any sampling,  testing,
or drilling to identify the presence of any Hazardous Materials at the Property,
without  Landlord's  prior  written  consent  which  shall  not be  unreasonably
withheld.  Tenant shall  promptly  provide  Landlord  with copies of any claims,
notices,  work  plans,  data and reports  prepared,  received  or  submitted  in
connection  with any  sampling,  testing or drilling  performed  pursuant to the
preceding sentence.

         E. Tenant shall  indemnify,  defend (with legal  counsel  acceptable to
Landlord,  whose consent shall not  unreasonably  be withheld) and hold harmless
Landlord, its employees, assigns, successors, successors-in-interest, agents and
representatives  from and against any and all claims  (including but not limited
to  third  party  claims  from  a  private  party  or a  government  authority),
liabilities,  obligations,  losses,  causes  of  action,  demands,  governmental
proceedings or directives, fines, penalties,  expenses, costs (including but not
limited to  reasonable  attorneys',  consultants'  and other  experts'  fees and
costs),  and  damages,  which  arise from or relate to: (i)  Tenant's  Hazardous
Materials  Activities;  (ii) any  Hazardous  Materials  contamination  caused by
Tenant prior to the

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Commencement  Date of the Lease; or (iii) the breach of any obligation of Tenant
under    this    Paragraph    44    (collectively,    "Tenant's    Environmental
Indemnification").  Tenant's Environmental  Indemnification shall include but is
not limited to the  obligation  to promptly  and fully  reimburse  Landlord  for
losses in or reductions to rental income, and diminution in fair market value of
the Property.  Tenant's Environmental  Indemnification shall further include but
is not  limited to the  obligation  to  diligently  and  properly  implement  to
completion,  at  Tenant's  expense,  any  and all  environmental  investigation,
removal,  remediation,  monitoring,  reporting,  closure  activities,  or  other
environmental  response  action as may be required by  applicable  Environmental
Laws,  regulations or governing  agencies  (collectively,  "Response  Actions").
Tenant shall promptly provide Landlord with copies of any claims,  notices, work
plans, data and reports  prepared,  received or submitted in connection with any
Response Actions.

         F. Landlord hereby makes the following  representations to Tenant, each
of  which  is made  only to the  best of  Landlord's  knowledge  as of the  date
Landlord executes this Lease,  without any inquiry or investigation  having been
made or required by Landlord regarding this subject,  nor does Landlord have any
obligation to investigate or make inquiry regarding the subject:

                  (1) The soil and ground  water on or under the  Premises  does
not contain Hazardous  Materials in amounts which violate any laws to the extent
that any governmental entity could require either Landlord or Tenant to take any
remedial action with respect to such Hazardous Materials.

                  (2)  During  the time that  Landlord  has owned the  Premises,
Landlord has received no notice of (i) any violation,  or alleged violation,  of
any law that has not  been  corrected  to the  satisfaction  of the  appropriate
authority,  (ii) any  pending  claims  relating  to the  presence  of  Hazardous
Material on the Premises, or (iii) any pending investigation by any governmental
agency concerning the Premises relating to Hazardous Materials.

         G.  Landlord and Tenant shall each give written  notice to the other as
soon as  reasonably  practicable  of (i) any  communication  received  from  any
governmental  authority  concerning  Hazardous  Materials  which  relates to the
Premises,  and (ii) any  contamination  of the Premises by  Hazardous  Materials
which  constitutes  a violation of any law.  Attached as Exhibit "D" hereto is a
list of  Hazardous  Materials  that Tenant  intends to use at the  Premises.  If
during the Lease Term Tenant  proposes to use other  Hazardous  Materials at the
Premises,  Tenant shall inform  Landlord of such use,  identifying the Hazardous
Materials and the manner of their use, storage and disposal, and shall agree (i)
to use,  store and dispose of such  Hazardous  Materials  strictly in compliance
with all laws,  regulations  and governing  agencies and (ii) that the indemnity
set forth in Paragraph 44 shall be applicable to Tenant's use of such  Hazardous
Material.

         H.  Landlord  or Tenant  may, at any time,  cause  testing  wells to be
installed on the Premises, and may cause the ground water to be tested to detect
the  presence  of  Hazardous  Material  by the use of  such  tests  as are  then
customarily  used for such purposes.  Testing wells installed by Tenant shall be
paid for by Tenant.  If tests  conducted  by Landlord  disclose  that Tenant has
violated  any  Hazardous  Materials  laws,  or Tenant or parties on the Premises
during the Term of this Lease have  contaminated  the Premises as  determined by
regulatory  agencies  pursuant to Hazardous  Materials  laws, or that Tenant has
liability to Landlord  pursuant to Paragraph  44A, then Tenant shall pay for 100
percent of the cost of the test and all related expense. Prior to the expiration
of the Lease Term, Tenant shall remove any testing wells it has installed at the
Premises,  and  return  the  Premises  to the  condition  existing  prior to the
installation  of such wells,  unless  Landlord  requests in writing  that Tenant
leave all or some of the testing wells in which instance the wells  requested to
be left shall not be removed.

         I.  If  any  tests  performed  by  Tenant  or  Landlord  prior  to  the
Commencement Date disclose Hazardous Materials at the Premises,  Landlord at its
expense will promptly take all reasonable action required by law with respect to
the existence of such Hazardous Materials at the Premises. The Commencement Date
shall not be delayed because of such action by Landlord unless occupation of the
Premises is prohibited by law.

         J. The obligations of Landlord and Tenant under this Paragraph 44 shall
survive the  expiration or earlier  termination  of the Term of this Lease.  The
rights and obligations of Landlord and Tenant with respect to issues relating to
Hazardous Materials are exclusively established by this

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Paragraph 44.

45.  APPROVALS:  Whenever this Lease  requires the approval or consent of either
Landlord or Tenant before an action may be taken, such approval or consent shall
not be unreasonably withheld or delayed.

46.  LANDLORD'S  RIGHT TO TERMINATE:  It is  understood  that the Premises to be
leased by  Tenant  are to be  constructed  by  Landlord,  and that  Landlord  is
required to obtain the necessary  building permits for the building shell before
construction of said Premises can commence.  Therefore, it is agreed that in the
event Landlord cannot obtain all the necessary building permits for the building
shell by December 31, 1997,  then either  Landlord or Tenant can terminate  this
Lease by  written  notice to the  other  party  given  within  thirty  (30) days
thereafter, without any liability to the other party of any type whatsoever, and
that this  Lease  Agreement  shall be null and void as of the date of receipt of
such  notice.  Landlord  agrees to use its best  efforts to obtain the  required
permits by December 31, 1997.

47.  CROSS  DEFAULT:  As set forth in  Paragraph  40C,  Landlord and Tenant have
entered an Option Agreement related to Building 7. In the event Tenant exercises
its option to lease Building 7, and as a material part of the  consideration for
the  execution  of this Lease by  Landlord,  it is agreed  between  Landlord and
Tenant that a default under this Lease,  or a default under the Building 7 Lease
may, at the option of Landlord,  be considered a default  under both leases,  in
which event Landlord  shall be entitled (but in no event  required) to apply all
rights  and  remedies  of  Landlord  under the terms of one lease to both of the
Leases  including,  but not limited to, the right to  terminate  the  Building 7
Lease or this  Lease by  reason  of a  default  under  the  Building  7 Lease or
hereunder.

48.  ADDRESS  FOR LEASED  PREMISES:  It is  understood  that the address for the
Premises  will be assigned by the City of Milpitas (the "City") upon issuance of
a building  permit for the  Interior  Improvements.  Once the  address  has been
assigned to the Premises by the City, this Lease shall  thereafter be amended to
reflect the assigned address for the Premises leased hereunder.

49. HETCH-HETCHY LAND: Landlord hereby assigns to Tenant during the Term of this
Lease,  all of Landlord's  right,  title,  and interest,  in and to the property
owned by the City and  County of San  Francisco  shown in  Orange  on  Exhibit A
attached hereto, and Tenant hereby assumes all  responsibilities and liabilities
(including,  but not  limited  to a fee  and/or  tax for the  right  to use said
property  including any use provided for in the Deed attached  hereto as Exhibit
E) that may be  imposed by the City and County of San  Francisco  pertaining  to
their property and Tenant's use and occupancy thereof. Tenant's right to use the
area outlined in Orange will  continue  until this right to use said property is
revoked or  terminated  by the City and County of San  Francisco,  at which time
said  property  outlined  in  Orange  belonging  to the City and  County  of San
Francisco  will no longer be  available  for  Tenant's  use, and this lease will
continue in full force and effect  excluding  Tenant's right to use the property
outlined in Orange on Exhibit A attached hereto.

         Tenant's  use of the  property  owned  by the City  and  County  of San
Francisco  shall be  governed  by the terms  and  conditions  of the Deed  dated
February  5, 1951  between  Chizu  Oyama  Takeda and  George  Shoji  Takeda,  as
Grantors,  and the City and County of San  Francisco,  as Grantee (the  "Deed").
Said Deed is attached  hereto as Exhibit E. Among the provisions of said Deed is
the  restriction  that the property  shall not be used for  parking,  and Tenant
understands that at no time during the Term of the Lease shall Tenant be allowed
to use said property for parking.

         Notwithstanding the foregoing, Tenant may use the Hetch-Hetchy Land for
such  additional  uses as may not be permitted in the Deed  provided  Tenant (i)
obtains the written  permission  from the City and County of San Francisco to do
so in form reasonably acceptable to landlord, (ii) removes the "bridge" which is
contemplated  to go over said  Hetch-Hetchy  Land if  requested  by the City and
County of San Francisco and/or if Landlord  requires said "bridge" to be removed
by the Lease  Termination Date, (iii) pays all costs and expenses imposed by the
City and County of San Francisco in connection with such permission and use, and
(iv) Tenant indemnifies and holds harmless Landlord from any loss.

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expense, cost, claim, or liability arising in connection with such permission or
any use pursuant to such  permission  of the  Hetch-Hetchy  Land  undertaken  by
Tenant,  its agents,  employees,  contractors,  invitees,  visitors,  subtenants
and/or  assignees.  Landlord and Tenant agree that if the City of Milpitas  will
not issue a building permit for Building 6 in the configuration and location for
which it is designed as of the date of this Lease  because of the  proximity  to
the Hetch-Hetchy Land or for any other reason, then Tenant shall have the option
to  cause  Building  6 to be  relocated  on the  land  and  redesigned  in a new
configuration  acceptable to the City, Landlord and Tenant,  provided the square
footage of the relocated and redesigned  building is no less than  approximately
182,355  square  feet and the  parking  allocation  is not  reduced  due to said
redesign and/or relocation.

50. SECURITY DEPOSIT: The following provisions shall modify Paragraph 4G:

         A. Within thirty (30) days after the expiration or earlier  termination
of the Lease term and after  Tenant has vacated  the  Premises,  Landlord  shall
return to Tenant the entire  Security  Deposit  except for amounts that Landlord
has deducted  therefrom  that are needed by Landlord to cure  defaults of Tenant
under the Lease or  compensate  Landlord  for damages for which Tenant is liable
pursuant to this Lease.  The use or disposition of the Security Deposit shall be
subject to the provisions of California Civil Code Section 1950.7.

         B. During the first thirty (30) days following  execution of this Lease
Agreement,  and only  during  said  thirty  day  period,  Tenant  shall have the
one-time  option of satisfying its obligation with respect to an amount equal to
one-half (1/2) ($355,592.25) of the $711,184.50  Security Deposit required under
Paragraph  4.G. by  providing to  Landlord,  at Tenant's  sole cost, a letter of
credit which: (i) is drawn upon an institutional  lender  reasonably  acceptable
and  accessible  to  Landlord  in form and content  reasonably  satisfactory  to
Landlord; (ii) is in the amount of one-half (1/2) of the Security Deposit; (iii)
is for a term of at lease twelve (12) months; (iv) with respect to any letter of
credit in effect within the six month period immediately prior to the expiration
of the Lease term,  shall  provide  that the term of such letter of credit shall
extend at least forty five (45) days past the Lease  expiration  date (including
any extensions  thereof);  and (v) may be drawn upon by Landlord upon submission
of a declaration  of Landlord that Tenant is in default (as defined in Paragraph
19 and as modified by Paragraph 59).  Landlord shall not be obligated to furnish
proof of  default  to such  institutional  lender,  and  Landlord  shall only be
required to give the institutional lender written notification that Tenant is in
default  and  upon  receiving  such  written   notification  from  Landlord  the
institutional  lender shall be obligated to immediately deliver cash to Landlord
equal to the amount Landlord may spend or become obligated to spend by reason of
Tenant's default or to compensate Landlord for any loss or damage which Landlord
may suffer by reason of Tenant's default up to 1/2 of the total Security Deposit
required  under  Paragraph  4.G. Said letter of credit shall provide that if the
letter of credit is not renewed,  replaced or extended  within  twenty (20) days
prior to its expiration date the issuer of the credit shall  automatically issue
a cashiers check payable to Landlord in the amount of the letter of credit after
the date which is twenty (20) days before the expiration date, and no later than
the  expiration  date,  without  Landlord being required to make demand upon the
letter of credit.  If Tenant provides  Landlord with a letter of credit,  within
thirty  (30)  days  of the  execution  of  this  Lease,  meeting  the  foregoing
requirements,  one-half (1/2) of the cash Security Deposit (i.e., $355.592.25 of
the  $711.184.50  Security  Deposit)  shall be  returned  to Tenant by  Landlord
inasmuch as the cash deposit  remaining and the Letter of Credit equal the total
Security  Deposit  required in Paragraph 4G. If Tenant  defaults with respect to
any provisions of this Lease,  including but not limited to provisions  relating
to the payment of Rent, Landlord may (but shall not be required to) draw down on
the letter of credit for payment of any sum which  Landlord  may spend or become
obligated to spend by reason of Tenant's default,  or to compensate Landlord for
any loss or damage  which  Landlord  may suffer by reason of  Tenant's  default.
Landlord and Tenant acknowledge that such letter of credit will be treated as if
it were a cash  security  deposit,  and such  letter of credit may be drawn down
upon by Landlord  upon demand and  presentation  of evidence of the  identity of
Landlord to the issuer,  in the event that Tenant  defaults  with respect to any
provision of this Lease and such default is not cured within any applicable cure
period.  Notwithstanding  anything to the contrary in this Lease, Landlord shall
not be obligated to furnish  proof of default to such  institutional  lender and
Landlord is only required to give the institutional  lender written notification
that Tenant is in default and upon  receiving  such  written  notification  from
Landlord the institutional lender shall be obligated to immediately deliver cash
to Landlord equal to the amount Landlord may spend or become  obligated to spend
by reason of Tenant's default,  or to compensate Landlord for any loss or damage
which Landlord may suffer by reason of

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Tenant's default up to 1/2 of the total Security Deposit.  Landlord acknowledges
that it is not entitled to draw down such letter of credit unless Landlord would
have been entitled to draw upon the cash security  deposit pursuant to the terms
of  Paragraph  4G of the Lease.  Concurrently  with the delivery of the required
information to the issuer,  Landlord shall deliver to Tenant written evidence of
the default  upon which the draw down was based,  together  with  evidence  that
Landlord  has provided to Tenant the written  notice of such  default  which was
required  under the  applicable  provision  of the Lease,  and  evidence  of the
failure  of Tenant to cure such  default  within  the  applicable  grace  period
following  receipt of such notice of default.  Any proceeds received by Landlord
by drawing  upon the letter of credit  shall be applied in  accordance  with the
provisions  governing  the  Security  Deposit  imposed by  Paragraph 4G and this
Paragraph  50. If Landlord  draws upon the letter of credit,  thereafter  Tenant
shall once again have the right to post a letter of credit in place of  one-half
(1/2) of a cash  Security  Deposit so long as Tenant is not then in default.  In
any event Tenant will be obligated to replenish  the amount drawn to restore the
Security  Deposit to its original amount as provided for in Paragraph 4G. If any
portion  of the  letter of credit is used or  applied  pursuant  hereto,  Tenant
shall,  within ten (10) days after  receipt of a written  demand  therefor  from
Landlord,  restore  and  replace  the  value  of such  security  by  either  (i)
depositing  cash with  Landlord in the amount  equal to the sum drawn down under
the  letter of  credit,  or (ii)  increasing  the  letter of credit to its value
immediately prior to such application.  Tenant's failure to replace the value of
the security as provided in the preceding sentence shall be a material breach of
its obligation under this Lease.

51. ALTERATIONS MADE BY TENANT: The provisions of this Paragraph 51 shall modify
Paragraphs 5 and 6:

         A. As used herein,  the term  "Alteration"  shall mean any  alteration,
addition or  improvement  made by Tenant to the Premises  during the term of the
Lease,  but shall not  include  Tenant's  trade  fixtures  so long as such trade
fixtures  are not  installed  in such a manner that they have become an integral
part of the building.

         B. Tenant shall not construct any  Alterations  or otherwise  alter the
Premises without Landlord's prior written approval:  (i) if Tenant is in default
under  this  Lease or any of the  Existing  Leases,  or (ii) if Tenant is not in
default  under this Lease or the Building 7 Lease (if Tenant has  exercised  its
Option to lease  Building 7) and if the total cost of such  Alterations  exceeds
$20,000 per the scope of any single  remodeling job to the Premises,  or if such
Alteration is structural in nature and provided  Tenant gives Landlord notice of
the planned  alterations and a 1/8" scale sepia  reflecting said alterations ten
(10)  business  days  prior  to  the   commencement   of  construction  of  said
alterations.  Any other  non-structural  Alteration of less than $20,000 for the
total cost of the remodeling job may be undertaken by Tenant without  Landlord's
prior written approval,  except as noted herein, but with the understanding that
Tenant shall be obligated to restore the Premises as set forth in Paragraph 5 at
the termination of this Lease,  except as otherwise provided in  Paragraph 51.D.
Notwithstanding  the  foregoing,  Tenant  shall  have the  right to  reconfigure
modular  freestanding  walls and partitions  without  Landlord's  prior consent,
which are not part of the original Interior  Improvements shown on Exhibit B and
which have been installed by Tenant and paid for by Tenant.  Notwithstanding the
above,  Tenant  shall  not have the  right,  without  Landlord's  prior  written
consent, to remove any floor-to-ceiling partitions within the Premises.

         C. At all times  during the Lease Term (i) Tenant  shall  maintain  and
keep up dated  "as-built" plans for all Alterations  constructed by Tenant,  and
(ii) Tenant shall provide to Landlord  copies of such  "as-built"  plans as such
Alterations are made.

         D.  Provided  Tenant is not in default under this Lease or under any of
the  Existing  Leases,  Tenant shall have the right to remove at any time during
the Lease term or prior to the expiration  thereof any process equipment such as
clean hoods, thermal cycling chambers,  freon piping, high temperature furnaces,
air handlers,  which  equipment the parties agree for the purposes of this Lease
shall be  deemed to be trade  fixtures,  so long as Tenant  repairs  all  damage
caused by the installation and/or removal thereof, returns the Premises prior to
the termination of the Lease to the condition existing prior to the installation
of such item, and repairs and restores any so-called  "doughnuts" or gaps in the
roof  and/or  floor  tiles  and/or  ceiling  and  lighting  resulting  from such
installation and/or removal. At the time Tenant requests the consent of Landlord
to approve the installation of an Alteration  requiring the consent of Landlord,
Tenant shall seek from Landlord a written statement of

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whether or not  Landlord  will  require  Tenant to remove  such  Alteration  and
restore all or part of the Premises as required by Landlord in  accordance  with
this paragraph and Paragraph 5 at the  expiration or earlier  termination of the
term of the Lease.  If Tenant  does not obtain  from  Landlord  a  statement  in
writing that  Landlord will not require such  Alteration to be removed,  then at
the expiration or sooner termination of the term of the Lease, it is agreed that
Tenant may be required  by  Landlord to remove all or part of such  Alterations,
and return the Premises to the condition  existing prior to the  installation of
such  Alterations as provided for in Paragraph 5 above.  In addition,  if Tenant
has installed  Alterations  without Landlord's consent, if Landlord so requires,
Tenant shall also remove all or part of such  Alterations  so installed  without
Landlord's  consent as Landlord  may  designate  and return the  Premises to the
condition existing prior to the installation of such Alteration. Alterations for
which Landlord has given its written consent to Tenant that such Alteration need
not be  removed,  shall not be  removed by Tenant at the  expiration  or earlier
termination of the term of the Lease.

         E. At all times  during  the term of the Lease,  Tenant  shall have the
right to install and remove trade fixtures as defined in the Lease and installed
and paid for by  Tenant,  so long as Tenant  repairs  all  damage  caused by the
installation  and removal  thereof and  returns  the  Premises to the  condition
existing prior to the installation of such fixtures and repairs and restores any
so  called  "doughnuts"  or gaps  in the  roof  and/or  floor  (including  floor
structure,  sub-floor and appropriate floor covering for said area) and/or floor
tiles,  and/or  ceiling  tiles,  wall damage and  lighting  resulting  from such
removal.

         F. Notwithstanding anything to the contrary herein, Tenant shall be one
hundred percent (100%)  responsible and liable for obtaining any and all permits
(and the cost related  thereto)  required by the governing  agencies for any and
all alterations and/or modifications Tenant makes to the Leased Premises.

52.  STRUCTURAL  CAPITAL  COSTS  REGULATED BY  GOVERNMENTAL  AGENCIES  AFTER THE
COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR TENANT'S  USES OR REMODELING
OF THE PREMISES:  The provisions of this Paragraph 53 shall modify  Paragraphs 7
and 14:

         A. If during the last five (5) years of the term of the Lease if Tenant
has not extended the Lease as provided  for in  Paragraphs  41 and 42, or during
either of the five (5) year extension  periods permitted by Paragraphs 41 and 42
or Paragraph 40.C., it becomes  necessary (due to any  governmental  requirement
for  continued  occupancy  of the  Premises)  to  make  structural  improvements
required by laws enacted or legal requirements imposed by governmental agency(s)
after the Commencement Date, and the cost for each required work or improvements
exceeds  $100,000,  then if such legal  requirement  is not  imposed  because of
Tenant's  specific  use of the  Premises  and is  not  "triggered"  by  Tenant's
Alterations  or  Tenant's  application  for  a  building  permit  or  any  other
governmental approval (collectively "Tenant's Actions") in which instance Tenant
shall be responsible for 100%  of the cost of such improvements,  Landlord shall
be responsible  for paying the cost of such  improvement and  constructing  such
improvement, subject to a cash contribution from Tenant of a portion of the cost
thereof as provided for and calculated in Paragraph 52B.

         B. When Landlord makes an improvement pursuant to Paragraph 52A, and as
a condition to Landlord's obligation to construct such improvement, Tenant shall
make the following  contribution  in cash to Landlord for the cost thereof prior
to the commencement of the work by Landlord.  It is agreed that Tenant shall pay
to Landlord 100% of the cost of the first $100,000.00 worth of each improvement.
After the first $100,000.00,  all costs above $100,000.00 shall be divided by 15
and multiplied by the time period remaining in the last  five years of the Lease
term from the date work on such improvement commences.

         For example, if the improvement is not required as a result of Tenant's
Actions and if the cost of such  improvement was $400,000 and there was one year
and six months remaining in the Lease term when the work commenced,  then Tenant
would be responsible for reimbursing Landlord in cash

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$130,000.00 computed as follows:

          Total Cost of Work                             $4O0,000.00
          Tenant Responsible for
            1st $100,000                                 -100,000.00 
                                                         -----------
          Total Amount To Be Amortized                   $300,000.00

          $300,000.00/15 = $20,000.00/yr. x 1.5 yrs =    $ 30,000.00

          Tenant responsible for $100,000 + $30,000.00 = $130,000.00


         C. If Landlord has made  improvements,  for which Tenant has reimbursed
Landlord  for the cost thereof  pursuant to Paragraph  52B, and the term of this
Lease is subsequently  extended  pursuant to the exercise by Tenant of an option
to renew  pursuant to Paragraph  41, or 42, upon the exercise of any such option
by Tenant,  Tenant  shall pay to Landlord an  additional  sum equal to the total
amount of said improvement less the amount previously paid for by Tenant.  Using
the example in Paragraph  52B above,  Tenant  would owe Landlord the  additional
amount of $270,000.00 ($400,000.00 - $130,000.00 = $270,000.00).

53. REAL PROPERTY TAXES: Paragraph 9 is modified by the following:

         A. The term "Real Property Taxes" shall not include charges,  levies or
fees  directly  related to the use,  storage,  disposal or release of  Hazardous
Materials on the Premises unless directly related to Tenant's Activities at this
site or on other sites leased and/or owned by Tenant;  however,  Tenant shall be
responsible for general or special tax and/or assessments  (related to Hazardous
Materials and/or toxic waste) imposed on the Property  provided said special tax
and/or assessment is not imposed due to on-site originated  contamination on the
Property  (by  third   parties  not  related  to  Tenant)  prior  to  the  Lease
Commencement  Date.  Subject to the terms and conditions  stated herein,  Tenant
shall be responsible for paying one hundred percent  (100%) of said taxes and/or
assessments allocated to the Property.

         B. If any  assessments for public  improvements  are levied against the
Premises,  Landlord may elect either to pay the  assessment  in full or to allow
the  assessment to go to bond. If Landlord pays the  assessment in full,  Tenant
shall pay to Landlord or any assignee or  purchaser  of the  Premises  each time
payment of Real Property Taxes is made a sum equal to that which would have been
payable (as both principal and interest) had Landlord  allowed the assessment to
go to bond.

         C.  Tenant at its cost  shall have the  right,  at any time,  to seek a
reduction  in the  assessed  valuation  of the  Premises  or to contest any Real
Property  Taxes that are to be paid by Tenant.  If Tenant  seeks a reduction  or
contests such Real Property Taxes, the failure on Tenant's part to pay such Real
Property  Taxes being so  contested  shall not  constitute  a default so long as
Tenant  complies with the  provisions of this  Paragraph.  Landlord shall not be
required  to join in any  proceeding  or contest  brought  by Tenant  unless the
provisions of any law require that the proceeding or contest be brought by or in
the name of Landlord.  In that case Landlord  shall join in the  proceedings  or
contest or permit it to be brought in Landlord's name as long as Landlord is not
required to bear any cost.  Tenant, on final  determination of the proceeding or
contest, shall immediately pay or discharge its share of any Real Property Taxes
determined  by any  decision  or  judgment  rendered,  together  with all costs,
charges,  interest,  and penalties  incidental  to the decision or judgment.  If
Tenant does not pay the Real  Property  Taxes when due pursuant to the Lease and
Tenant seeks a reduction or contests them as provided in this paragraph,  before
the commencement of the proceeding or contest Tenant shall furnish to Landlord a
surety bond in form  reasonably  satisfactory to Landlord issued by an insurance
company  qualified  to do business in  California.  The amount of the bond shall
equal  125% of the total amount of Real  Property  Taxes in dispute and any such
bond shall be assignable  to any lender or purchaser of the  Premises.  The bond
shall hold Landlord and the Premises harmless from any damage arising out of the
proceeding  or contest and shall insure the payment of any judgment  that may be
rendered.

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54. PROPERTY INSURANCE: Paragraph 12 is modified by the following:

         A. If Tenant so elects,  Tenant may obtain from a third party insurance
company the insurance  required to be carried by Landlord  pursuant to Paragraph
12 so long as each of the following conditions is satisfied: (i) the Landlord is
not the John  Arrillaga  Survivor's  Trust and/or the Richard T. Peery  Separate
Property Trust or an affiliated  entity or entities as the case may be; (ii) the
insurance to be carried by Tenant to satisfy this requirement  strictly complies
with all of the  provisions  of Paragraph  12; (iii) such  insurance  shall name
Landlord as the insured and provide  that it is to be payable to Landlord in the
same  manner as if such  insurance  had been  carried by  Landlord  pursuant  to
Paragraph 12 (subject to the rights of any lender  holding a mortgage or deed of
trust encumbering the Premises);  (iv) each lender holding a mortgage or deed of
trust  encumbering  the Premises shall have given its written  consent to Tenant
carrying such insurance and such insurance shall comply with the requirements of
any such lender;  (v) Tenant must notify  Landlord,  by certified mail, no later
than one hundred  eighty (180) days prior to the  expiration  date of Landlord's
insurance policy (which expiration date is currently 3/13/xx of a given year and
is subject to  change;  Landlord  shall  notify  Tenant in the event  Landlord's
insurance year changes) that Tenant will directly obtain the required  insurance
coverage for the insurance  year  commencing  3/14/XX  through  3/13/XX and each
insurance  year  through  the  termination  date of this  Lease,  including  any
extensions  thereof, or until Tenant is no longer able to comply with all of the
provisions of this paragraph 55; (vi) the annual premium must be paid in full at
the commencement of the policy;  (vii) the insurance policy must be issued for a
one-year  period  following the expiration date of Landlord's  insurance  policy
(i.e., from 3/14/XX to  3/13/XX;  (viii) any and all deductibles  required under
the policy will be paid entirely by Tenant;  (ix) the terms of the coverage must
be broad form and cover all items to be covered as set forth in  Paragraph 12 of
this  Lease;  (x) the  Building  and  Premises  must be  insured  for their full
replacement cost; (xi) the  insurance policy containing the required coverage in
accordance  with the  provisions of this  paragraph must be sent to Landlord for
retention  within  thirty (30) days prior to the  expiration  date of Landlord's
insurance policy,  and may not be terminated or altered without thirty (30) days
written notice to Landlord by the company providing such insurance (it is agreed
that if the  insurance  policy is canceled or  altered,  Landlord  will have the
right to obtain the property insurance  coverage on said building,  and Landlord
will bill the Tenant for the related insurance premium);  and (xii) at all times
while Tenant is so carrying such insurance,  Tenant is Quantum  Corporation or a
successor  entity  and the then net  worth  of such  corporation  is equal to or
greater than the net worth of Quantum  corporation  as of the date of this Lease
is executed by Landlord  and Tenant.  Tenant shall  provide such  evidence as is
required by Landlord and any lender to establish  that the insurance that Tenant
carries  pursuant  to  this  Paragraph  54  has  been  obtained  and  meets  the
requirement of this  Paragraph 54. Such insurance  carried by Tenant shall be in
form and  provided by an  insurance  company that is  reasonably  acceptable  to
Landlord, which must be rated "A plus" or better by Best's Insurance Service (or
an  equivalent rating from another rating agency should Best's no longer provide
such  service).  A copy of any such policy shall be  delivered  to Landlord.  If
Tenant elects to insure and such  insurance  provided by Tenant does not satisfy
the requirements of Paragraph 12, in the event of a subsequent casualty,  Tenant
shall be responsible for and shall pay for that portion of the restoration cost,
in excess of the insurance  proceeds  actually  available,  that would have been
covered by insurance satisfying the requirements of Paragraph 12.

55. ASSIGNMENT AND SUBLETTING: The following modifications are made to Paragraph
16:

         A. In the event that Tenant seeks to make any  assignment  or sublease,
then Landlord,  by giving Tenant  written notice of its election  within fifteen
(15) days after  Tenant's  notice of intent to assign or sublease has been given
to  Landlord,  shall have the right to elect (i) to withhold its consent to such
assignment or sublease,  as permitted pursuant to Paragraph 1, or (ii) to permit
Tenant to so assign the Lease or sublease  such part of the  Premises,  in which
event  Tenant may do so, but without  being  released of its  liability  for the
performance of all of its obligations  under the Lease,  and the following shall
apply (except the following shall not apply to a "Permitted  Transfer" described
in Paragraph 56):

                  (1) If Tenant  assigns its  interest  in this  Lease,  then in
addition to the rental provided for in this Lease,  Tenant shall pay to Landlord
fifty percent  (50%) of all Rent and other consideration received by Tenant over
and above (i) the assignee's agreement to assume the obligations of Tenant under
this Lease and (ii) all "Permitted  Transfer  Costs" (as defined herein) related
to such assignment.  As used herein,  the term "Permitted  Transfer Costs" shall
mean all reasonable leasing commissions

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paid to third  parties  not  affiliated  with  Tenant  in order  to  obtain  the
assignment or Sublease in question.

         (2) If Tenant  sublets all or part of the  Premises,  then Tenant shall
pay to Landlord in addition to the Rent provided for in this Lease fifty percent
(50%) of the  positive  difference,  if any,  between  (i) all  rent  and  other
consideration  paid or provided to Tenant by the  subtenant,  less (ii) all Rent
paid by Tenant to Landlord pursuant to this Lease which is allocable to the area
so sublet and all  Permitted  Transfer  Costs  related to such  sublease.  After
Tenant has recovered all Permitted  Transfer  Costs Tenant shall pay to Landlord
the amount  specified  in the  preceding  sentence  on the same  basis,  whether
periodic  or in lump sum,  that such  rent and  other  consideration  is paid to
Tenant by its subtenant, within seven (7) days after it is received by Tenant.

         (3) Tenant's  obligations  under this  subparagraph  shall  survive any
assignment  or  sublease.  At the time  Tenant  makes any  payment  to  Landlord
required by this subparagraph, Tenant shall deliver an itemized statement of the
method by which  the  amount  to which  Landlord  is  entitled  was  calculated,
certified  by  Tenant  as true and  correct.  Landlord  shall  have the right to
inspect Tenant's books and records relating to the payments due pursuant to this
subparagraph.  Upon request therefor, Tenant shall deliver to Landlord copies of
all bills, invoices or other documents upon which its calculations are based.

         (4)  As  used  herein,   the  term   "consideration"   shall  mean  any
consideration  of any  kind  received,  or to be  received  (including,  but not
limited to,  services  rendered  and/or value received) by Tenant as a result of
the  assignment  or  sublease,  if such sums are paid or  provided to Tenant for
Tenant's interest in this Lease or in the Premises.

         (5) This  Paragraph 55.A does not apply to a "Permitted  Transfer",  as
provided in Paragraph 56 hereof.  The parties agree that if any of the following
transactions  occur and do not  qualify as  "Permitted  Transfers",  Tenant must
obtain Landlord's consent to such transaction and if Landlord consents to any of
the  following  transactions  which  do  not  otherwise  qualify  as  "Permitted
Transfers",  then the  provisions of this  Paragraph 55.A shall not apply to the
following transactions:  (i) a merger,  consolidation or other reorganization in
which Tenant is not the surviving  corporation  so long as 95% of all assets and
liabilities of Tenant are permanently  transferred to such assignee; and (ii) an
assignment of this Lease to a corporation which purchases or otherwise  acquires
95% or more of the assets of Tenant so long as 95% of all assets and liabilities
of Tenant are permanently transferred to such assignee and Tenant remains liable
and  responsible  under the Lease to the extent  Tenant  continues  in existence
following such transaction.

56. PERMITTED ASSIGNMENTS AND SUBLEASES:  Notwithstanding  anything contained in
Paragraph  16, so long as  Tenant  otherwise  complies  with the  provisions  of
Paragraph  16 and the  Permitted  Transfer  does  not  release  Tenant  from its
obligations  hereunder,  Tenant may enter into any of the following transfers (a
"Permitted   Transfer")  without  Landlord's  prior  written  consent,  and  the
provisions of Paragraph 55A shall not apply to any such Permitted Transfer:

         A.  Tenant  may  sublease  all or part of the  Premises  or assign  its
interest in this Lease to any corporation  which controls,  is controlled by, or
is under common  control  with Tenant by means of an ownership  interest of more
than fifty percent (50%) providing Tenant remains liable for the payment of Rent
and full performance of the Lease;

         B. Tenant may assign its interest in the Lease to a  corporation  which
results from a merger,  consolidation or other reorganization in which Tenant is
not the surviving  corporation so long as (i) 95% of all assets and  liabilities
of Tenant are  permanently  transferred to such assignee,  and (ii)  immediately
prior to the merger, consolidation or other reorganization, the corporation into
which  Tenant is to be merged has a net worth  equal to or greater  than the net
worth  of  Tenant  at the  time  of  Lease  execution  or at the  time  of  such
assignment,  merger,  consolidation or reorganization (whichever is greater), or
if it does  not,  Landlord  is  provided  a  guaranty  of the  Lease  (in a form
reasonably acceptable to Landlord) from a corporation (a) that is the parent of,
or is otherwise  affiliated  with,  the  corporation  into which Tenant is to be
merged,  and (b) which has a current net worth equal to or greater  than the net
worth  of  Tenant  at the  time  of  Lease  execution  or at the  time  of  such
assignment,  merger,  consolidation or reorganization (whichever is greater). In
the event there is not a permanent

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transfer  of 95% or more of the assets and  liabilities  from  Tenant to a third
party, and Tenant continues to exist as a separate entity,  both companies shall
be jointly and severally liable for the full terms and conditions of the Lease;

         C. Tenant may assign this Lease to a  corporation  which  purchases  or
otherwise  acquires  95% or more of the  assets  of Tenant so long as 95% of all
assets and  liabilities of Tenant are  permanently  transferred to such assignee
(in the event there is not a permanent transfer of 95% or more of the assets and
liabilities  from  Tenant to a third  party and Tenant  continues  to exist as a
separate  entity,  both companies shall be jointly and severally  liable for the
full terms and conditions of the Lease),  and provided that immediately prior to
such assignment said  corporation,  has a net worth equal to or greater than the
net worth of  Tenant  (a) at the time of Lease  execution  or (b) at the time of
such assignment  (whichever is greater), or if it does not, Landlord is provided
a guaranty of the Lease (in a form  reasonably  acceptable  to Landlord)  from a
corporation  (a) that is the parent of, or is otherwise  affiliated  with,  said
corporation  and (b) which has a current net worth equal to or greater  than the
net  worth  of  Tenant  at the time of  Lease  execution  or at the time of such
assignment, (whichever is greater).

57.  SUBORDINATION AND MORTGAGES:  Paragraph 17 is modified to provide that this
Lease shall not be  subordinate to a mortgage or deed of trust unless the Lender
holding  such  mortgage or deed of trust  enters  into a written  subordination,
non-disturbance  and  attornment  agreement  in which  the  Lender  agrees  that
notwithstanding  any  subordination  of this Lease to such Lender's  mortgage or
deed of trust, (i) such Lender shall recognize all of Tenant's rights under this
Lease, and (ii) in the event of a foreclosure this Lease shall not be terminated
so long as Tenant is not in  material  default  of its  obligations  under  this
Lease,  but shall  continue  in effect and Tenant and such  Lender (or any party
acquiring the Premises through such foreclosure)  shall each be bound to perform
the  respective  obligations of Tenant and Landlord with respect to the Premises
arising after such foreclosure.

58. LANDLORD'S RIGHT TO ENTER:  Notwithstanding  the provisions of Paragraph 18,
(i) except in the event of an emergency,  Landlord shall give Tenant twenty-four
(24) hours  notice  prior to entering  the  Premises,  agrees to comply with any
reasonably safety and/or security  regulations imposed by Tenant with respect to
such entry,  and shall only enter the Premises when accompanied by Tenant or its
agent (so long as Tenant makes itself  reasonably  available for this  purpose),
and (ii)  Landlord may install "for lease" signs  relating to the Premises  only
during  the  last  150  days  of the  Lease  term.  Landlord  agrees  to use its
reasonable,  good faith efforts such that any entry by Landlord,  and Landlord's
agents, employees,  contractors and invitees shall be performed in a manner with
as minimal  interference  as possible  with  Tenant's  business at the Premises.
Subject  to  the  foregoing,  Tenant  agrees  to  cooperate  with  Landlord  and
Landlord's  agents,  employees  and  contractors  so  that  responsibilities  of
Landlord  under the Lease can be fulfilled in a reasonable  manner during normal
business hours so that no extraordinary costs are incurred by Landlord.

59.  BANKRUPTCY  AND  DEFAULT:  Paragraph  19 is modified  to provide  that with
respect to nonmonetary defaults not involving Tenant's failure to pay Basic Rent
or  Additional  Rent,  Tenant  shall  not  be in  default  of  any  non-monetary
obligation  if (i)  more  than  thirty  (30)  days  is  required  to  cure  such
non-monetary  default, and (ii) Tenant commences cure of such default as soon as
reasonably  practicable  after  receiving  written  notice of such  default from
Landlord and thereafter continuously and with due diligence prosecutes such cure
to completion.

60. ABANDONMENT: Paragraph 20 is modified to provide that Tenant shall not be in
default under the Lease if it leaves all or any part of Premises  vacant so long
as (i)  Tenant  is  performing  all of its  other  obligations  under  the Lease
including  the  obligation  to pay Basic Rent and  Additional  Rent (ii)  Tenant
provides  on-site  security  during normal business hours for those parts of the
Premises  left  vacant,  (iii) such vacancy does not  materially  and  adversely
affect the validity or coverage of any policy of  insurance  carried by Landlord
with respect to the Premises, and (iv) the utilities and heating and ventilation
system are operated to the extent necessary to prevent damage to the Premises or
its systems.

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                                    Page 15

61. DESTRUCTION: Paragraph 21 is modified by the following:

         A.  Notwithstanding  anything  to the  contrary  within  Paragraph  21,
Landlord  may  terminate  this  Lease in the event of an  uninsured  event or if
insurance proceeds, net of the deductible, are insufficient to cover one hundred
percent of the rebuilding costs; provided,  however, Tenant shall have the right
to elect, in its discretion,  to contribute such excess funds to permit Landlord
to repair the Premises.

         B. Except as provided in Paragraph 61C,  Landlord may not terminate the
Lease if the Premises are damaged by a peril whereby the cost to replace  and/or
repair is one  hundred  percent  (100%)  covered  by the  insurance  carried  by
Landlord pursuant to Paragraph 12, but instead shall restore the Premises in the
manner described by Paragraph 21. 

         C. If the  Premises  are  damaged by a peril  covered by the  insurance
carried by Landlord  pursuant to Paragraph 12, Landlord shall have the option to
terminate  the Lease if each of the following  conditions is satisfied:  (i) the
cost to repair or the  damage  exceeds  thirty-three  percent  (33%) of the then
replacement  cost of the  Premises;  and (ii) the  damage  occurs at a time when
there  is  less  than  five  (5)  years  remaining  in the  term  of the  Lease.
Notwithstanding  the  foregoing,  if such damage  occurs at a time when there is
less  than  five (5)  years  remaining  in the term of the  Lease  and  Landlord
notifies  Tenant of Landlord's  election to terminate the Lease  pursuant to the
provisions of this  Paragraph 6lB, if Tenant has the right to extend the term of
this Lease pursuant to either Paragraph 41 or 42 such that the remaining term of
the  Lease  (including  the  option  period)  will be more  than  five (5) years
following  the date of such  damage,  this Lease shall not  terminate  if Tenant
notifies Landlord in writing of Tenant's exercise of an option to extend granted
to Tenant by either  Paragraph  41 or 42. In such  event,  this Lease  shall not
terminate,  the term  shall be so  extended,  and  Landlord  shall  restore  the
Premises in the manner provided in Paragraph 21.

         D. If  Landlord  fails to obtain  insurance  as  required  pursuant  to
Paragraph 12, and said  insurance  would have been available to cover any damage
or  destruction to the Premises,  Landlord shall be required to rebuild,  at its
cost, net of the deductible  which would have been required under said insurance
policy (which deductible Tenant is required to pay).

         E. If the Premises are damaged by any peril, then as soon as reasonably
practicable,   Landlord  shall  furnish  Tenant  with  the  written  opinion  of
Landlord's architect or construction  consultant as to when the restoration work
required of Landlord may be completed. Tenant shall have the option to terminate
this  Lease in the  event  any of the  following  occurs,  which  option  may be
exercised  only by  delivery  to  Landlord  of a written  notice of  election to
terminate within seven (7) days after Tenant receives from Landlord the estimate
of the time needed to complete such restoration:

                  (1) The  Premises  are  damaged by any peril (not caused by or
resulting from an action of Tenant or Tenant's agents, employees, contractors or
invitees) and, in the reasonable opinion of Landlord's architect or construction
consultant,  the  restoration  of the Leased  Premises  cannot be  substantially
completed  within  180 days  after  the date of such  damage  (subject  to force
majeure conditions); or

                  (2) The  Premises  are  damaged by any peril (not caused by or
resulting from an action of Tenant or Tenant's agents, employees, contractors or
invitees)  within  twelve  (12)  months  of the last day of the  Lease  term and
provided  Tenant has not exercised an option to renew pursuant to the provisions
of Paragraph 41 or 42, and, in the reasonable opinion of Landlord's architect or
construction  consultant,  the  restoration  of the  Leased  Premises  cannot be
substantially completed within sixty (60) days after the date of such damage and
Tenant has not exercised its Option to Extend said Term (or Extended Term as the
case may be).

62. EMINENT DOMAIN: Paragraph 22 is modified by the following:

         Landlord  may not  terminate  the Lease if less than one third (1/3) of
the building is taken by  condemnation  or if a taking by  condemnation  is only
threatened.

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                                    Page 16

63.  TRANSFER BY LANDLORD:  The  provisions  of Paragraph 23 of the Lease to the
contrary  notwithstanding,  Landlord  shall not be relieved  of its  obligations
under the  Lease  which may  accrue  after the date of a sale or other  transfer
unless and until (i) the  transferee  agrees to assume and be bound by the terms
of this Lease and to perform all  obligations  of the  Landlord  under the Lease
which may accrue after the date of such  transfer,  and (ii) Landlord  transfers
the cash  balance  of the  Security  Deposit  (net of any  offsets  used to cure
defaults  under  the  Lease)  to  its  successor  in  interest  (transferee)  in
accordance  with the  provisions of  California  Civil Code Section  1950.7,  as
amended or recodified.

64. LANDLORD'S LIEN WAIVER: Landlord,  within thirty (30) days after demand from
Tenant, shall execute and deliver such lien waiver documents that are reasonably
required by any supplier,  lessor, or lender in connection with the installation
in the Premises of the Tenant's  personal  property or trade fixtures  providing
Landlord  approves the form of any such waiver and Landlord's  rights under this
Lease are not materially and adversely affected.

65.  AUTHORITY TO EXECUTE.  The parties  executing this Lease  Agreement  hereby
warrant and  represent  that they are properly  authorized to execute this Lease
Agreement  and bind the  parties  on  behalf  of whom they  execute  this  Lease
Agreement  and to all of the  terms,  covenants  and  conditions  of this  Lease
Agreement as they relate to the respective parties hereto.


QUANTUM CORPORATION,                       JOHN ARRILLAGA SURVIVOR'S            
a Delaware corporation                     TRUST                                
                                                                                
                                           By John Arrillaga                    
By  /s/ Andrew Kryder                      -------------------------------------
- -------------------------------------      John Arrillaga, Trustee              
Andrew Kryder, Vice President Finance                                           
and Corporate General Counsel              Date: 6/30/97                        
                                           -------------------------------------
                                                                                
Date: June 25, 1997                                                             
- -------------------------------------                                           
                                           RICHARD T. PEERY SEPARATE            
                                           PROPERTY TRUST                       
By /s/ Norm Claus                                                               
- -------------------------------------      By /s/ Richard T. Peery              
Norm Claus, Vice President Real Estate     -------------------------------------
and Corporate Services                     Richard T. Peery, Trustee            
                                                                                
Date: June 25, 1997                        Date: 6/26/97                        
- -------------------------------------      -------------------------------------
                                      






















                                                     Initial: __________


<PAGE>
                                                                         Lease 7
                                                                      Building 7

                                OPTION AGREEMENT

   
         THIS  AGREEMENT  dated April 16, 1997 by and  between  JOHN  ARRILLAGA,
Trustee, or his Successor Trustee,  UTA dated 7/20/77 (JOHN ARRILLAGA SURVIVOR'S
TRUST) as amended and RICHARD T. PEERY,  Trustee, or his Successor Trustee,  UTA
dated 7/20/77 (RICHARD T. PEERY SEPARATE PROPERTY TRUST) as amended, hereinafter
called "Optionor", and QUANTUM CORPORATION, a Delaware corporation,  hereinafter
called "Optionee".

         WHEREAS,  Optionor,  as Lessor, and Optionee,  as Lessee,  have entered
into a Lease  Agreement  described as Lease 6, Building 6 for 182,355+/-  square
feet of space, dated April 16, 1997,  hereinafter referred to as the "Building 6
Lease". Said property covered by the Lease is located on Sumac Drive,  Milpitas,
California,  as shown within the area outlined in Orange on Exhibit "A" attached
hereto and by reference made a part hereof. The details of said Building 6 Lease
are more particularly described and set forth in the Building 6 Lease; and

         WHEREAS,  Optionor is willing to grant to Optionee the exclusive  right
to lease from Optionor one (1) additional building on a parcel contiguous to the
parcel on which Building 6 is 1ocated for the use and occupancy by Optionee,  if
Optionee elects to exercise said option, upon the terms and conditions set forth
herein; 

         NOW,  THEREFORE,  for the option  consideration to be paid,  receipt of
which is  hereby  acknowledged,  and for the  other  consideration  referred  to
herein, the parties agree as follows:

                                   ARTICLE I

                            GRANT OF OPTION TO LEASE

         Provided  that Optionee is not in material  default of its  obligations
(i) under the Building 6 Lease or if in material  default has  received  written
notice of default  from  Optionor and such default has not been cured within the
period  provided  for  in  the  Building  6  Lease  (provided,   however,  if  a
non-monetary default by Optionee under the Building 6 Lease cannot be cured, and
if Optionor does not elect to terminate the Building 6 Lease as a result of such
nonmonetary and non-curable  default,  Optionee may exercise the option provided
for herein),  or (ii) under any  provision  of this  Agreement or if in material
default has  received  written  notice from  Optionor of its intent to terminate
this Agreement because of such default and Optionee has failed to cure a default
in the  payment of money  within  three (3) days after such  notice or any other
default within ten (10) days after such notice, and subject to the provisions of
Article II, Optionor hereby grants to Optionee the exclusive right to lease that
certain real property consisting of approximately  12.297 acres of land, more or
less,  located  in the  City of  Milpitas,  County  of  Santa  Clara,  State  of
California,  and  contained  within the area  outlined  in Green on  "Exhibit A"
attached hereto, and by reference made a part hereof (hereinafter referred to as
"Option Property"),  on which Optionee shall have the option to lease additional
facilities from Optionor on the following terms and conditions:

         A. OPTION PROPERTY:  Said Option Property,  consisting of approximately
12.297 acres,  more or less,  shall consist of one (1) separate (but not legally
subdivided)  parcel of property,  (APN  086-02-038)  as shown on Exhibit "A", on
which a building (Building 7) of approximately  208,096+/- square feet shall be
constructed.

         B. TERM OF OPTION: Optionee's option, as granted hereunder with respect
to the Option Property described above shall commence on the date of this Option
Agreement and shall terminate December 31, 1999 ("Option Period"), unless sooner
terminated,  as provided for herein,  and regardless of the commencement date of
the Building 6 Lease.

                                                       Initial:  ALK  JA  NHC
                                                                 ------------
<PAGE>

         C. PUBLIC AGENCY REQUIREMENTS: The parties understand that the proposed
construction  of the  building on the Option  Property is subject to any and all
requirements,  now or in the future,  of the City of Milpitas  and/or  County of
Santa Clara, and/or City of San Jose, hereinafter  individually and collectively
referred  to as "Public  Agency." It is agreed that in the event that the Public
Agency  reduces the size of the option  building  (Building  7) and imposes land
rules and  regulations  affecting  the Option  Property  to meet  Public  Agency
regulations and requirements,  that the building to be constructed on the Option
Property  shall be built as  required to  accommodate  the  requirements  of the
Public Agency and the land use and/or  entitlements  pertaining thereto and that
this option shall be subject to all Public Agency requirements.

         D.  CONSIDERATION:  As consideration for Optionor agreeing to the terms
hereof,  Optionee agrees to pay,  promptly,  and prior to delinquency,  all real
estate taxes and  assessments  assessed  against the Option  Property,  from the
beginning of the Option Period through the  termination  date of this Agreement,
as they appear on the tax bills,  provided,  however, that if Optionee exercises
its option to lease, it is agreed that  notwithstanding the foregoing,  Optionee
shall continue to pay all real estate taxes and assessments  attributable to the
Option  Property  through  the  commencement  date of the  lease  of the  Option
Property and will thereafter be responsible for paying all real estate taxes and
assessments  as required  under the new lease for the Option  Property.  For the
purpose of this Agreement,  "real estate taxes and assessments" shall be defined
as set forth in Paragraph 9 of the Building 6 Lease. In addition,  Optionee also
agrees to pay,  on January  1, 1997,  and on each  anniversary  date  thereafter
during the Option  Period,  an amount equal to Ten  Thousand and No/100  Dollars
($10,000)  per acre per annum  multiplied  by the acreage  contained  within the
Option Property as additional  consideration for this option.  Optionee shall be
liable for the payment of the option  consideration  set forth above through the
termination of this option.  Any payments to be made hereunder shall be prorated
accordingly to reflect the commencement and termination dates of this option.

         For Example:

         If the Option  Property is 12.297  acres,  then the  additional  option
         consideration to be paid would be calculated as follows:

         Option Property = 12.297 acres x  $10,000.00/acre  = $122,970.00,  plus
         real estate taxes and assessments

         E. EXERCISE OF OPTION:  Optionee  shall  exercise  Optionee's  right to
lease the Option  Property by giving  written  notice to Optionor of  Optionee's
exercise of this option at any time after  execution  of this  Agreement  by the
parties and prior to the  expiration  of the term of this option on December 31,
1999,  unless the option is  terminated  earlier as provided for herein.  Should
Optionee fail to timely exercise Optionee's option to lease the Option Property,
this Agreement shall be null and void, and Optionee shall have no further rights
under this Agreement, and Optionor shall be free to deal with third parties with
respect to the Option Property,  without any obligation to Optionee  whatsoever,
with Optionee  remaining  liable for payment of the option  consideration as set
forth in  Article  I  Section  D above,  through  the  termination  date of this
Agreement.

         F. LEASE TERMS IF OPTION TO LEASE IS TIMELY EXERCISED:

                  1. CONSTRUCTION OF NEW BUILDING AND INTERIOR IMPROVEMENTS:  In
the event Optionee  exercises its option,  subject to Article I Section E on the
Option Property prior to the termination of the Option Period,  Optionee will be
required to lease the entire building of approximately 208,096+/- square feet on
the Option Property,  subject to any reduction as set forth in Article I Section
C above.  The shell of the  building  to be  erected by  Optionor  on the Option
Property  in  the  event  this  option  is  exercised   by  Optionee   shall  be
architecturally  compatible  with, and of a quality of construction  and type of
material  used  substantially  the same as, the  building  provided for Optionee
pursuant to the Building 6 Lease.

                                                      Initial:  ALK  JA  NHC
                                                                ------------
                                       -2-

<PAGE>

The interior improvements (i.e., heating, lighting, electrical,  plumbing, vinyl
tile and/or carpeted floors, acoustical suspended ceiling, interior partitioning
and doors,  and the like) of the new  building on the Option  Property  shall be
proportionately  equal to the interior  improvements  under the Building 6 Lease
and  Optionor  will  provide  Optionee  with a $25.00  per  square  foot  Tenant
Improvement  Allowance  under the same basic terms and  conditions  as contained
within the Construction Letter attached hereto as Exhibit "B-2".

Notwithstanding  any  provisions to the contrary  contained in the  Construction
Letter  attached as Exhibit "B-2"  (subject to amendment  related to the size of
the  building  and dates  where  appropriate),  Optionor  agrees to  furnish  to
Optionee,  within  sixty (60) days after  Optionee's  exercise  of its option to
lease  the  Option  Property,  definitive  shell  plans for the  building  to be
constructed on the Option Property.  As used herein,  the term "definitive shell
plans"  does not mean  working  drawings,  but means and refers to shell  design
plans showing such details as columns,  windows, shear structure,  "K" bases and
core area.  Optionee  agrees,  within  sixty (60) days after its receipt of such
definitive shell plans, to deliver to Optionor complete plans and specifications
for the  interior  improvements  that  Optionee  wishes  constructed  in the new
building.  If Optionee wishes to later change said plans or specifications,  any
such changes shall be permitted subject to the terms and conditions of Paragraph
8 of the  Construction  Letter set forth in Exhibit "B-2",  provided that in the
event the completion  date of the building is delayed by such changes  requested
by  Optionee,  the  lease  commencement  date  of  the  new  building  and  rent
commencement shall be the date the new building would have been completed in the
absence of such changes requested by Optionee.  Optionor shall have a reasonable
time period after the  completion of the building and  commencement  date of the
lease to complete the landscaping  and "punch list" items  pertaining to the new
building without the commencement date of the lease and rent being affected. The
building  shall be  completed  by Optionor  and ready for  occupancy by Optionee
within one (1) year after the date of exercise of the option by Optionee and the
lease  agreement  is  executed  by the parties  regarding  the Option  Property,
subject to delays caused by strikes, acts of God, governmental restrictions,  or
other causes beyond  Optionor's  control,  in which instance the time period for
Optionor's completion of the building shall be extended  accordingly;  provided,
however,  in no event shall the building be completed  later than  eighteen (18)
months after the exercise of the option by Optionee.

         2. LEASE  AGREEMENT:  Optionee  and Optionor  shall  execute a separate
lease agreement and  construction  letter (as set forth  respectively in Exhibit
"B-1" and Exhibit  "B-2") for the Option  Property  within thirty (30) days from
Optionee's  exercise  of such  option.  The  terms and  conditions  of the lease
agreement  pertaining to the Option Property shall be identical to the terms and
provisions of the Building 6 Lease,  including without limitation the options to
extend the term,  except as  modified  by this  Agreement  and  except  that the
provisions  of  Section F.1 above  relating  to shell and  interior  improvement
plans shall be  incorporated  therein and the provisions of Paragraph 40 ("Lease
Term and  Commencement  Date") of the Lease will be deleted  and the  provisions
coveting the Lease Term,  Rental and Hazardous Waste and Toxic Materials,  shall
be determined as follows:

                  (a) Lease Term and  Commencement of Lease:  The lease term for
the Option  Property shall be for a minimum  period of ten (10) years,  or for a
term  expiring  conterminously  with  the  lease  term of the  Building  6 Lease
(including the option to extend that term, if exercised by Optionee),  whichever
time  period is the  longer,  but in no event shall the lease term on the Option
Property  be less than ten (10) years.  The term of the lease shall  commence as
soon as the building and leasehold improvements have been completed by Optionor,
unless Optionee delays completion of the building, in which event the lease will
commence on the date it would have been  completed  in the absence of the delays
caused by Optionee.

                  (b) Rental:

                           (1) Basic Monthly  Rental:  The initial monthly Basic
Rental (which amount does not include the Management Fee and/or  Additional Rent
charges which  Optionee will be  responsible  for,  including but not limited to
taxes, insurance, utilities,

                                                      Initial:  ALK  JA  NHC
                                                                ------------
                                      -3-
<PAGE>

maintenance,  etc.,  as  described in Paragraph 4B of the Building 6 Lease) from
the  commencement of the lease on the Option  Property  through the full term of
the lease (subject to the rental  increases  provided for in Section  F.2.(b)(2)
below)  shall be a sum equal to $1.60  absolute  triple net per square  foot per
month times the number of square feet  contained  within the new  building to be
constructed;  provided,  however,  that such Basic Rent shall be increased by 8%
(non-compounding)  for each twelve (12) month period that  commences on or after
August 1, 1998 or on or before the Commencement Date of the Lease of Building 7.
By way of example only, (i) if the Commencement  Date occurred during the period
commencing  on August 1, 1998 and  ending on July 31,  1999,  the Basic  Rent of
$1.60  per  square  foot  per  month  would  be  increased  by 8%;  (ii)  if the
Commencement  Date occurred  during the period  commencing on August 1, 1999 and
ending on July 31, 2000, the Basic Rent of $1.60 per square foot per month would
be increased  by 16%; and (iii) if the  Commencement  Date  occurred  during the
period  commencing on August 1, 2000 and ending on July 31, 2001, the Basic Rent
of $1.60 per square foot per month would be  increased by 24%. By way of further
example,  if the Commencement  Date for the Building 7 Lease is October 1, 1999,
and the new building is 208,096  square feet,  the adjusted  Basic Rent would be
$386,226.18, calculated as follows:

Lease on Option Property to Commence:                 October 1, 1999    
Size of Building was:                                 208,096 sq. ft.    
                                                 
Monthly Basic Rent Calculation:
       $1.60 per sq. ft. x 208,096 sq. ft.        =   $332,953.60  
                                                                   
Plus 8% annual increase per Twelve Month Period*:    
       (8/1/98-10/1/99) = 16% increase            =   $53,272.58       
                                                                       
Adjusted Basic Rent as of Lease                         
       Commencement Date of 10/01/99:                 $386,226.18


                                                       Adjusted
Number of Twelve Month Periods         % Incr.         Base Rent     Basic Rent
- --------------------------------------------------------------------------------
*    (1)    8/1/98-7/31/99    x 8%    1st period
- --------------------------------------------------------------------------------
*    (2)    8/1/99-7/31/00    x 8%    2nd period
- --------------------------------------------------------------------------------
                               16% Total Increase    x $333,953.60 = $386,226.18
- --------------------------------------------------------------------------------

Notwithstanding the foregoing,  within thirty (30) days after Optionee exercises
its  option  to  lease  and  Optionee  has  delivered  the  complete  plans  and
specifications  for the  Interior  Improvements  Optionee  desires  Optionor  to
construct,  as provided  for in Section  F.1 above,  Optionor  shall  deliver to
Optionee Optionor's  estimated,  projected  completion date for the building and
all  interior  improvements  to be  constructed  by Optionor,  it being  agreed,
however,  that such date is only an  estimate  and that the date the Lease shall
commence  shall be as set  forth in  Section  F.2(a)  above.  In the  event  the
completion of the building and interior  improvements is delayed beyond the date
set forth in Optionor's schedule for any reason other than the acts of Optionee,
or acts of God,  strikes,  governmental  restrictions,  or other  causes  beyond
Optionor's  control,  then even if the  commencement  date occurs on August 1 or
later in that particular calendar year, the 8% annual increase in Basic Rent for
that particular year provided for in this Section shall be inapplicable.

                  (2) Annual Basic Rent  Increase:  It is understood  and agreed
that on each and every anniversary of the lease commencement date the Basic Rent
will be increased by $.05 per square foot,  including extensions of the Building
7 Lease if Optionee timely  exercises either of the two five (5) year options to
extend the Lease. It is understood by the parties hereto, if Optionee  exercises
its Option to Extend on either the Building 6 Lease or the Building 7 Lease, the
other Lease shall be  automatically  be  extended,  subject to the terms  stated
herein and in each respective Lease.

         (c) Security  Deposit:  The initial Security Deposit required under the
Building 7 Lease  (which  amount is subject to  increase  pursuant  to  Tenant's
exercise  of any Option to  Extend)  shall be equal to the sum of the Basic Rent
for the first month in the initial

                                      -4-

                                                      Initial:  ALK  JA  NHC
                                                                ------------
<PAGE>

Lease Term plus the Basic Rent for the last month in the initial Lease Term. For
Example:  if the  Building 7 Lease  commences on October 1, 1999 as shown in the
example in Paragraph  2(b)(1) above, and the length of the initial Lease Term is
ten years,  the Security  Deposit  required  under the Building 7 Lease would be
calculated as follows:

Basic Rent due 10/1/99:    $386,226.18 =     $1.856 per square foot 
Rent increase over ten year term                                    
= $1.856 + (9 x $0.05)                 =     $0.45 per square foot  
                                             
Basic Rent due 9/1/09      $479,869.38 =     $2.306 per square foot
                           -----------

Security Deposit:          $866,095.56
                           ===========

                  (d) Hazardous  Materials  and Toxic Wastes:  The parties agree
that the  provisions  of  Paragraph  44 of the  Building 6 Lease  pertaining  to
hazardous  materials  and  toxic  wastes  shall be  incorporated  into the above
referenced  lease  to be  executed,  if the  option  to lease  is  exercised  by
Optionee, with the exception that notwithstanding any provisions to the contrary
in said  Paragraph  44 of the  Building  6  Lease,  Optionee  shall  have  those
obligations  thereunder  with  respect to site  generated  contamination  on the
Option  Property  commencing  on the date  this  Agreement  is  executed  by all
parties,  except as more  particularly  set forth in Article III Section F(3) of
this Agreement, Optionee shall have no responsibility whatsoever,  including any
obligation to clean up or indemnify  with respect to any hazardous  materials or
toxic  wastes  present  on the Option  Property  because  of the  storage,  use,
disposal or transportation of such materials by any of Optionor's contractors or
otherwise  arising out of construction  work performed by or under the direction
of Optionor on the Option Property.

                  (e) Hetch-Hetchy Land: The following language will be included
within the Building 7 Lease  related to the  Hetch-Hetchy  Land  adjacent to the
Property:  "Landlord hereby assigns to Tenant during the Term of this Lease, all
of Landlord's  right,  title, and interest,  in and to the property owned by the
City and County of San Francisco  shown in Orange on Exhibit A attached  hereto,
and Tenant hereby assumes all responsibilities and liabilities  (including,  but
not limited to a fee and/or tax for the right to use said property including any
use provided for in the Deed  attached  hereto as Exhibit E) that may be imposed
by the City and  County  of San  Francisco  pertaining  to  their  property  and
Tenant's use and occupancy  thereof.  Tenant's right to use the area outlined in
Orange  will  continue  until  this  right to use said  property  is  revoked or
terminated by the City and County of San Francisco,  at which time said property
outlined in Orange  belonging  to the City and County of San  Francisco  will no
longer be available for Tenant's use, and this lease will continue in full force
and effect  excluding  Tenant's right to use the property  outlined in Orange on
Exhibit A attached hereto.

         Tenant's  use of the  property  owned  by the City  and  County  of San
Francisco  shall be  governed  by the terms  and  conditions  of the Deed  dated
February  5, 1951  between  Chizu  Oyama  Takeda and  George  Shoji  Takeda,  as
Grantors,  and the City and County of San  Francisco,  as Grantee (the  "Deed").
Said Deed is attached  hereto as Exhibit E. Among the provisions of said Deed is
the  restriction  that the property  shall not be used for  parking,  and Tenant
understands  that at no time  during  the Term of the  Lease  shall  Tenant  be
allowed to use said property for parking.

         Notwithstanding the foregoing, Tenant may use the Hetch-Hetchy Land for
such  additional  uses as may not be permitted in the Deed  provided  Tenant (i)
obtains the written  permission  from the City and County of San Francisco to do
so in form reasonably acceptable to landlord, (ii) removes the "bridge" which is
contemplated  to go over said  Hetch-Hetchy  Land if  requested  by the City and
County of San Francisco and/or if Landlord  requires said "bridge" to be removed
by the Lease  Termination Date, (iii) pays all costs and expenses imposed by the
City and County of San Francisco in connection with such permission and use, and
(iv) Tenant  indemnifies  and holds  harmless  Landlord from any loss,  expense,
cost,  claim, or liability arising in connection with such permission or any use
pursuant to such permission of the Hetch-Hetchy  Land undertaken by Tenant,  its
agents, employees, contractors, invitees, visitors, subtenants

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and/or  assignees.  Landlord and Tenant agree that if the City of Milpitas  will
not issue a building permit for Building 7 in the configuration and location for
which it is designed as of the date of this Lease  because of the  proximity  to
the Hetch-Hetchy Land or for any other reason, then Tenant shall have the option
to  cause  Building  7 to be  relocated  on the  land  and  redesigned  in a new
configuration  acceptable to the City, Landlord and Tenant,  provided the square
footage of the relocated and redesigned  building is no less than  approximately
208,096  square  feet and the  parking  allocation  is not  reduced  due to said
redesign and/or relocation."

         G. OPTIONEE'S RIGHT TO TERMINATE  OPTION:  In the event Optionee wishes
Optionor to discontinue  holding the Option  Property for  Optionee's  expansion
prior to the termination  date of this Option  Agreement,  unless this option is
sooner terminated as provided for in this Agreement, Optionee may terminate this
Option Agreement by giving Optionor written notice of Optionee's  termination of
this  Option  Agreement  and paying to  Optionor  at the time of such  notice of
termination  the option  consideration  set forth in Article I Section D through
the date of Optionee's  written notice of such option  termination,  after which
time  Optionor  shall be free to deal with  third  parties  with  respect to the
Option Property. In the case of early termination of this Agreement, any prepaid
consideration  (including but not limited to taxes and  assessments)  related to
this  Agreement  will be  prorated  to the date of such early  termination,  and
Optionee  will  remain  liable for payment of the option  consideration,  as set
forth in  Article  I  Section  D above,  through  the  termination  date of this
Agreement  and for any accrued but unpaid  consideration,  and shall be refunded
that  portion of the prepaid  consideration  which  relates to the period  after
termination.

         H. TERMINATION OF OPTIONEE'S RIGHTS' In the event (i) Optionee does not
submit the complete plans and  specifications  for the interior  improvements of
the building within the time period set forth in Article I Section F.1, and such
failure to submit plans is not remedied within thirty (30) days  thereafter,  or
(ii) Optionee  does not execute a lease  agreement  with Optionor  within thirty
(30) days after Optionee's exercise of Optionee's option to lease and such delay
is not unreasonably  caused by Optionor,  or (iii) Optionee is in default in any
of the terms,  covenants or conditions  of the Lease,  such default has not been
cured within the period  provided for in the Building 6 Lease,  and Optionor has
given  written  notice to Optionee  of its intent to  terminate  this  Agreement
because of such default,  or (iv) Optionee is in default of any other provisions
of this Agreement including, but not limited to, the consideration  requirements
set  forth in  Article I  Section  D above,  and (A) fails to cure such  default
within three (3) days after written notice thereof,  in the case of a failure to
pay any sums owing from Optionee  pursuant to the terms hereof,  or (B) fails to
cure a default in its  performance  of any other term or  covenant to be kept by
Optionee  hereunder,  within ten (10) days after written  notice of such default
from Optionor, or (v) Optionee is in material default of the Construction Letter
Agreement  related to the  Building  6 Lease and (A) fails to cure such  default
within three (3) days after written notice of a monetary default,  or (B) within
ten (10) days after written notice of any other default (provided if the default
cannot reasonably be cured within such ten (10) day period Optionee shall not be
in  default  if  it  promptly  commences  the  cure  and  thereafter  diligently
prosecutes  the cure to  completion),  or (vi) if  Optionee  does not perform as
required  under  the  provisions  of  Article  II  below,  and (A) such  failure
continues  more than three (3) days after  written  notice  from  Optionor of an
intent to  terminate  this Option  Agreement  due to  Optionee's  default in the
payment of any sums owing thereunder, or (B) Optionee does not cure such default
within ten (10) days  after  written  notice  from  Optionor  that it intends to
terminate this Agreement due to Optionee's  failure to perform any other term or
covenant to be kept by Optionee  thereunder,  then it is agreed that  Optionee's
rights  with  respect to this Option  Agreement  and the Option  Property  shall
terminate  if Optionor  so elects,  at  Optionor's  sole  discretion,  by giving
written notice of such termination to Optionee, with Optionor being free to deal
with third  parties with respect to the Option  Property and with the Building 6
Lease  remaining in full force and effect in the event of such  termination;  in
which event, any prepaid  consideration  (including but not limited to taxes and
assessments)  related to this  Agreement  will be  prorated  to the date of such
termination,  and  Optionee  will  remain  liable  for  payment  of  the  option
consideration as set forth in Article I Section D above, through the termination
date of this  Agreement and shall be refunded that portion of the  consideration
attributable  to  a  period  of  time  after  termination.  Optionee  upon  said
termination will immediately execute and record at

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agreement  relinquishing  all of  Optionee's  rights to the Option  Property  as
contained in this Agreement.

                                   ARTICLE II

                  OPTIONOR'S OPTION TO NOT CONSTRUCT BUILDING
                 ON OPTION PROPERTY - OPTIONEE'S OPTION TO BUY

         Notwithstanding  anything to the contrary in Article I above,  entitled
"Grant of Option to Lease," it is agreed  between  the  parties  hereto  that if
Optionor does not, in Optionor's sole and absolute discretion,  choose or desire
for any reason whatsoever to construct such building on the Option Property,  as
provided  for in  Article  I above,  then  Optionor  shall  have the right to be
relieved  from all  responsibility  to build  and/or lease under said Article I,
with respect to the Option Property,  providing Optionor gives written notice to
Optionee within sixty (60) days after Optionee  exercises  Optionee's  option to
lease the new facility  (Building  7) as provided  for in Article I above,  that
Optionor elects,  at Optionor's sole and absolute  discretion,  not to construct
the new building on the Option  Property in which event,  and in no other event,
Optionor  agrees to sell Optionee the Option  Property upon the following  terms
and conditions:

         A.  NOTICE  TO  EXERCISE  OPTION  TO BUY - DATE FOR  CLOSE  OF  ESCROW:
Optionee  must give  notice to  Optionor of  Optionee's  desire to purchase  the
aforesaid  Option  Property  within thirty (30) days after receipt of Optionor's
written notice to Optionee of Optionor's  election not to construct as set forth
above.  It is agreed if Optionee  timely  exercises  this option,  that Optionee
shall be  committed  and  obligated to close escrow on or before sixty (60) days
after Optionor has given Optionee the written notice of Optionor's  election not
to build as provided  for above,  subject to delays  related to defects in title
under Article II Section G below, upon the terms and conditions  hereinafter set
forth in this Article II and as otherwise provided for in this Agreement.

         B. PURCHASE  PRICE:  The purchase price of the Option Property shall be
an amount  equivalent  to TWENTY FIVE DOLLARS  ($25.00) per square foot of land,
plus an eight  percent (8%) annual  compound  interest  increase in the purchase
price (which  increase shall begin  accruing as of August 1, 1998),  lawful cash
consideration,  times the  number of square  feet  contained  within  the Option
Property,  and shall  include  easements but shall be exclusive of any area that
may be  acquired in fee by eminent  domain or  condemnation  by a Public  Agency
prior to the close of escrow, plus Optionee shall assume any and all assessments
on the  property  existing as of the date of sale as  reflected  on the City and
County tax bills and any  supplemental  taxes that may be issued at a later date
for said  property  or proposed to be  assessed  against  the  property  without
reduction in the purchase price.

         C. SITE AND  PARCEL  MAP  SURVEY: A survey  will be made by a  licensed
surveyor,  elected by Optionor and paid for by Optionee,  to determine the exact
square  footage,  and an  appropriate  parcel map recorded of the property to be
conveyed.

         D. TITLE INSURANCE:  Optionee will obtain, at Optionee's expense,  from
Chicago Title Company a standard  California Land Title Association (CLTA) Title
commitment in an amount equal to the purchase price of the Option  Property,  in
favor of  Optionee  to insure the  Option  Property,  subject  to the  permitted
exceptions of title set forth in Article II Section E below.

         E. TITLE: The Option Property shall be conveyed  strictly on an "as is"
basis as set forth in Article II Section F below,  and  Optionee  agrees to take
title to the Option  Property on an "as is" basis and  subject to the  following
"permitted exceptions":

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<PAGE>

                  (1) All  non-delinquent  real property taxes and  assessments,
and bonds outstanding as of the close of escrow,  and all exceptions as shown in
said Chicago Title Insurance  Company's  preliminary  title report number 771722
dated April 14, 1997, and attached hereto as Exhibit "C" and by reference made a
part of this Agreement, except for any of Optionor's current and/or future loans
against  said Option  Property  which  loans,  if any,  shall be  discharged  by
Optionor at close of escrow.

                  (2) Any easements,  right-of-way,  utility or street  easement
dedications  required  to be  made  or  common  driveway  easements,  covenants,
conditions,  and  restrictions  now of record or of record at the time  Optionee
exercises its option to buy the Option Property.

                  (3) Any other  exceptions  to title  that do not  unreasonably
affect the marketability,  financeability, or Optionee's reasonable use thereof,
and any normal  exclusions and provisions of the title company's  standard Title
Insurance  Policy and all  matters  that a current  and  accurate  survey of the
property would disclose.

                  (4) The Waiver and Release  Agreement set forth as Exhibit "D"
attached, which Optionee agrees to execute and record at the close of escrow.

                  F. "AS-IS":  Optionee  agrees that Optionee is purchasing  the
Option Property subject to the following understanding and agreement:  This is a
non-contingent  and  unconditional  offer to purchase the property on an "as is"
basis.   Optionee  has  inspected  the  Option   Property   including   acreage,
improvements (if any) thereon,  environmental and economic  characteristics  and
conditions as of the execution of this Agreement, and acknowledges that Optionee
has observed their physical characteristics  (including acreage) and conditions,
and  hereby  waives  any  and all  objections  to the  physical  characteristics
(including  acreage)  and  condition  of the  Option  Property  which  would  be
disclosed by such inspection or otherwise.  Optionee  acknowledges that Optionor
and its employees,  agents, or  representatives  have not made, and do not make,
any representations, warranties, or agreements by or on behalf of Optionor as to
any matters concerning the Option Property and the present or future use therof,
or the suitability of the Option Property for Optionee's  intended use. Optionee
is purchasing  the Option  Property  hereunder  strictly on an "as is" basis and
regardless  of the  condition  and repair of the  improvements  (if any), or the
Option Property's  topography,  climate,  air, water rights,  utilities,  water,
possible toxic waste or hazardous  materials,  present and future zoning,  soil,
subsoil,  purpose to which the Option  Property is suited,  drainage,  access to
public roads, and proposed routes or enlargement of road or extensions  thereof.
Optionee further acknowledges and agrees that the Option Property is, or may be,
subject to zoning, P.U.D., or other municipal ordinance restrictions,  and is to
be  purchased,  conveyed and accepted by Optionee in its present  condition  "as
is", and that no patent or latent  physical  condition of the building or Option
Property,  whether or not known or unknown or discovered at a later date,  shall
affect this  transaction  and the  purchase  price paid for the Option  Property
hereunder,  and Optionee shall be obligated to close escrow  notwithstanding the
condition  of  the  Option  Property  or  any  improvements  thereon.   Optionee
acknowledges that in the event of a purchase of the Option Property by Optionee,
Optionor  shall not have any  obligation  to  Optionee  to  remove,  clean up or
remediate any Hazardous Materials on the Option Property now, or discovered at a
later date. As used in this Agreement, the term "Hazardous Materials" shall mean
any substance or material which has been  determined or is hereafter  determined
by any state,  federal or local governmental  authority or regulatory body to be
capable of posing a risk of injury to health, safety and/or property, including,
but not  limited  to,  all of  those  materials  and  substances  designated  as
hazardous or toxic by the Environmental  Protection Agency, the California Water
Quality  Board,  the U.S.  Department  of Labor,  the  California  Department of
Industrial  Relations,  the U.S.  Department of  Transportation,  the California
Department of Food & Agriculture,  the Consumer Product Safety  Commission,  the
U.S.  Department  of  Health  and  Human  Services,   the  U.S.  Food  and  Drug
Administration,  or any other local,  state, or federal  governmental  agency or
authority or regulatory body now or hereafter  authorized to regulate  materials
and  substances  in the  environment.  Without  limiting the  generality  of the
foregoing the term 'Hazardous Materials shall include all of those materials and
substances (i) defined as

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<PAGE>

"toxic  materials" in Sections 66680 through 66685 of Title 22 of the California
Administrative  Code,  Division 4,  Chapter 30, as the same may be amended  from
time to time, or (ii) any other hazardous or toxic substance,  material or waste
which is or becomes regulated by any local governmental authority, any agency of
the State of California or any agency or the United  States  Government,  as the
above may be amended from time to time.  All work in connection  with  preparing
the  Option  Property  for the use  intended  by  Optionee,  all costs  incident
thereto, and all other costs, fees, studies, reports, approvals, plans, surveys,
permits and  expenses  whatsoever  necessary or  desirable  in  connection  with
Optionee's  acquiring,  developing,  using and/or operating the Option Property,
shall be  obtained  and paid for by,  and shall be the sole  responsibility  of,
Optionee.  Optionee has  investigated and has knowledge of operative or proposed
governmental  laws  and  regulations  including,  but not  limited  to,  Zoning,
environmental  (including  specifically  the  regulations  of the  Environmental
Protection Agency and the Bay Area Pollution Control District) and land use laws
and regulations to which the Option  Property may be subject,  and shall acquire
the  Option  Property  subject  to the  foregoing  and to such  other  laws  and
regulations that pertain to the Option  Property.  Optionee has neither received
nor relied upon any representations concerning such laws and regulations made by
Optionor,  Optionor's  employees,  agents  or any other  person  acting on or in
behalf of  Optionor.  Optionee  hereby  waives,  releases,  acquits  and forever
discharges Optionor, Optionor's employees, agents or any other persons acting on
or in behalf of  Optionor,  of and from any and all claims,  actions,  causes of
action, demands,  rights,  damages, costs, expenses or compensation  whatsoever,
direct or indirect, known or unknown,  foreseen or unforeseen,  that it now has,
or which may arise in the future, on account of or in any way growing out of, or
connected  with, the existence or condition of any  improvements or buildings on
the Option Property;  any toxic wastes or hazardous  materials  located thereon;
any settlement or subsidence of any fill or filled ground on the Option Property
or  settlement  or  subsidence  of  construction  thereon,  if any;  or with any
operative or proposed  governmental  laws and  regulations,  including,  but not
limited  to,  zoning,   flood,   earthquake,   toxic  and  hazardous  materials,
environmental and land use laws and regulations to which the Option Property may
be subject;  or with Optionee's  contemplated  use and development of the Option
Property, or with any other condition of the Option Property or plans.

         Any agreements,  warranties or representations  not expressly contained
herein shall in no way bind  Optionor.  Optionee  expressly  waives any right of
rescission   and  all   claims  for   damages   by  reason  of  any   statement,
representation,  warranty,  promise or covenant,  if any, not  contained in this
Agreement. The provisions of this Section shall survive the close of escrow.

         G. TITLE  DEFECTS:  If title to the Option  Property  shall prove to be
defective or  unmerchantable,  Optionor shall have a reasonable  time to perfect
same  providing  said period of time shall not exceed one hundred  twenty  (120)
days from  Optionee's  exercise of the option to purchase the Option Property as
provided  for in  Article  II  Section A above.  If  Optionor,  after  using due
diligence and all reasonable efforts, is unable to remove any such defect in the
title,  either party may terminate this Option Agreement with Optionor having no
liability or obligations to Optionee or any other third party,  it being agreed,
however,  that  Optionee may take title  subject to such defect or  imperfection
then existing.  All matters  concerning title to the Option Property shall merge
in the Grant Deed. In the event of any defect in or other matter affecting title
to the Option  Property,  Optionee  hereby  agrees to look only to the aforesaid
title insurance policy to secure any damages incurred by Optionee as a result of
said defect or matter.

         H. DEED  RESTRICTIONS:  COVENANTS,  CONDITIONS AND  RESTRICTIONS  TO BE
INCORPORATED  WITH THE GRANT DEED TO THE OPTION PROPERTY SOLD: It is agreed that
the following  language shall be incorporated  into the Grant Deed to the Option
Property sold to Optionee hereunder:

                  1.  Grantee,  prior to building  any  buildings  or making any
material  improvements  on the subject  property shall submit the building plans
and specifications,  building colors and landscaping plans, and obtain Grantor's
written  approval of the same. Said approval shall not be unreasonably  withheld
and  shall be  promptly  given,  providing  that:  (a) the  architecture  of any
building(s) to be constructed on the property deeded by Grantor to Grantee

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<PAGE>

under this deed shall be similar and generally  compatible with the architecture
of the building previously developed by Grantor for Grantee under the Building 6
Lease; (b) a landscape area is developed along the frontage of the street(s) and
will be located  between the street and parking area closest to the street;  and
(c) a  perimeter  driveway  is  developed  in  front  of the  building(s)  which
generally runs near and parallel with the street(s).

                  2. Grantee shall maintain at all times and keep in first class
condition all landscaping, driveways, and the exterior of the building(s) and/or
improvements  approved by Grantor in  subsection  (1) above,  and shall not make
material  changes in the  landscaping,  driveways  and  exterior of the building
without the Grantor's  written  consent,  which shall be promptly  given and not
unreasonably withheld.

                  3. No outside storage,  change of building color, additions to
the building or signs shall be permitted without the Grantor's written approval,
which shall be promptly given and not unreasonably withheld.

                  4.  "Grantor" as used herein shall mean and refer to the owner
of Building 6 (APN 086-02-039).

                  5. The  restrictions  contained in (1), (2), (3) and (4) above
shall be binding  upon and inure to the  benefit  of the heirs,  administrators,
successors,  and assigns of the parties hereto for a period of twenty-five  (25)
years from the recording of this deed.

         I. COSTS:  Taxes and assessments  shall be paid by Optionee pursuant to
Article I Section C, and Optionee  shall pay one hundred  percent  (100%) of the
title and title insurance costs, escrow fees, CLTA title policy, recording fees,
documentary stamps, transfer taxes, and all other normal closing costs.

         J. TERMINATION OF OPTIONEE'S RIGHTS: In the event (i) Optionee does not
elect to timely  purchase  the Option  Property as provided  for above,  or (ii)
Optionee  does not close  escrow  within  the  prescribed  period of time  after
electing to purchase the Option Property,  or (iii) Optionee is in default under
any of the terms,  covenants or  conditions  of the  Building 6 Lease,  and such
default  has not been cured  within the period  provided  for in the  Building 6
Lease,  and  Optionor  has given  written  notice to  Optionee  of its intent to
terminate  this  Agreement  because  of such  default,  or (iv)  Optionee  is in
material  default under any  provisions  of the  Construction  Letter  Agreement
related to the Building 6 Lease and fails to cure such default  within three (3)
days after  written  notice of a monetary  default or within ten (10) days after
written notice of any other default  (provided if the default cannot  reasonably
be cured within such ten (10) day period Optionee shall not be in default, if it
promptly  commences the cure and  thereafter  diligently  prosecutes the cure to
completion), or (v) Optionee is in default of any of the terms and conditions of
this  Agreement,  and (A) fails to cure such default within three (3) days after
written  notice  thereof  in the case of a failure  to pay any sums  owing  from
Optionee  hereunder,  or (B) fails to cure a default in its  performance  of any
other term or covenant to be kept by  Optionee  hereunder,  within ten (10) days
after written notice of such default from  Optionor,  then it is agreed that all
of the  Optionee's  rights with respect to this Option  Agreement and the Option
Property shall terminate if Optionor so elects,  at Optionor's sole  discretion,
by giving  written notice of such  termination  to Optionee,  at which time this
option shall terminate,  in which event any prepaid option consideration related
to this Agreement will be prorated to the date of such  termination by Optionor,
and Optionee will remain liable for payment of the option  consideration  as set
forth  in  Article  I  Section  C above  through  the  termination  date of this
Agreement  by Optionor and shall be refunded  that portion of the  consideration
attributable to a period of time after termination.

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<PAGE>

                                  ARTICLE III

                                    GENERAL

         A. NOTICES: Notices given hereunder shall be given either personally or
by registered or certified mail,  postage  prepaid,  addressed to the parties as
hereinbelow set forth:

             Optionor:     JOHN ARRILLAGA and RICHARD T. PEERY        
                           2560 Mission College Boulevard, Suite 101  
                           Santa Clara, CA 95054                      
                                                                      
             Copy to:      RICHARD T. PEERY          
                           2200 Cowper Street        
                           Palo Alto, CA 94301       
                                                     
             Optionee:     QUANTUM CORPORATION           
                           500 McCarthy Boulevard        
                           Milpitas, CA 95035            
                           Attention: Joe Rogers, CFO    
                                                         
            
or at such other address as either party may  hereafter  designate in writing to
the other.

         B.  ATTORNEYS  FEES:  In any action which may be brought to enforce the
provisions  of this  Agreement,  the  prevailing  party in such action  shall be
entitled to recover from the other party a reasonable attorney's fee in addition
to costs and necessary disbursements.

         C. ASSIGNMENT:  Optionee may not, under any  circumstances,  assign its
rights  under this  Agreement to a third party,  it being  understood  that this
right is granted  strictly to Optionee,  and to no other party.  Notwithstanding
the  foregoing,  Optionee  may  assign  its  interest  in  this  Agreement  to a
corporation which results from a merger,  consolidation or other  reorganization
in which Optionee is not the surviving  corporation,  or to a corporation  which
permanently  purchases  or  otherwise  permanently  acquires  95% or more of the
assets of Optionee;  provided  however,  in the event, if in any such assignment
there is not a complete  transfer  of all of the assets  from  Optionee  to such
permitted  assignee,  and Optionee  continues to exist as a separate entity, the
permitted  assignee and Optionee  shall be jointly and severally  liable for the
full terms and conditions of this Agreement.

         D. BINDING  EFFECT:  This  Agreement  shall inure to the benefit of and
shall be  binding  upon the heirs,  personal  representatives,  successors,  and
assigns of the parties hereto.

         E.  OPTIONOR'S  REPRESENTATION  TO  OPTIONEE  AND  TESTING:   Regarding
Hazardous  Materials  or toxic  wastes on the  Option  Property  subject to this
Agreement:

                  (1) Optionor  hereby makes the  following  representations  to
Optionee regarding  Hazardous Materials and toxic wastes on the Option Property,
each of which is made only to the best of  Optionor's  knowledge  as of the date
Optionor  executes this Agreement,  without any inquiry or investigation  having
been  made by  Optionor  regarding  this  subject,  nor does  Optionor  have any
obligation to  investigate  or make inquiry  regarding  the subject  inasmuch as
Optionee  is  conducting  its own soil and  water  investigation  of the  Option
Property  prior to, and within thirty (30) days  following its execution of this
Agreement:

                           (a) The soil and ground  water on or under the Option
Property does not contain Hazardous  Materials in amounts which violate any laws
to the extent that any  governmental  entity could require  Optionor to take any
remedial action with respect to such Hazardous Materials.

                                                      Initial:  ALK  JA  NHC
                                                                ------------
                                      -11-

<PAGE>

                           (b)  During  the time  that  Optionor  has  owned the
Option Property Optionor has received no notice of (i) any violation, or alleged
violation,  of any law that has not been  corrected to the  satisfaction  of the
appropriate  authority,  (ii) any pending  claims  relating  to the  presence of
Hazardous Material on the Option Property, or (iii) any pending investigation by
any  governmental  agency  concerning the Option Property  relating to Hazardous
Materials.

                  (2)  Optionor  or  Optionee  may,  at any time,  conduct  soil
sampling of, and/or cause testing wells to be installed on the Option  Property,
and may cause the soil and the ground  water to be tested to detect the presence
of Hazardous  Material by the use of such tests as are then customarily used for
such  purposes.  Testing  wells  installed  by  Optionee  shall  be paid  for by
Optionee.  Prior to the expiration or termination of the Option Period, Optionee
shall attempt to ascertain in writing from Optionor if Optionor  wants  Optionee
to remove any and/or all testing wells it has installed at the Option  Property,
and  return  the  Option  Property  to  the  condition  existing  prior  to  the
installation of such wells.

                  (3) If any tests  performed by Optionor or Optionee during the
Option Period  disclose  Hazardous  Materials  (at or above then current  action
levels as required by the governing agency) at the Option Property which are not
the  responsibility  of  Optionee  pursuant  to the  Building 6 Lease,  prior to
Optionor and Optionee entering into a lease for the Option Property, Optionor at
its expense will  promptly  take all action  required by law with respect to the
existence  of such  materials  at the Option  Property,  except  for  dumping of
hazardous  waste or toxic  materials  originating  on the  surface of the Option
Property after the date this  Agreement is executed by all parties,  which shall
be  Optionee's  obligation to promptly  clean up and remove,  and to pay for the
cost of such clean up and removal;  provided,  however,  Optionee  shall have no
responsibility  whatsoever,  including any obligation to clean up and remove any
Hazardous  Materials  or toxic wastes  originating  on the surface of the Option
Property  because  of the  storage,  use,  disposal  or  transportation  of such
materials or wastes by any of Optionor's contractors or otherwise arising out of
construction  work performed by or under the direction of Optionor on the Option
Property,  and  Optionor  shall  be responsible  for all  required  actions with
respect to such materials and wastes as provided above in this  subsection  (3).
Optionee's  obligations  with  respect to  Hazardous  Materials  or toxic wastes
thereafter  originating on the surface of the Option Property shall terminate if
Optionee  terminates its option,  unless such wastes or materials  originated on
the surface of the Option Property prior to such  termination or originated from
the  premises  leased by  Optionee  under the  Building 6 Lease or the  Building
leased from Optionor by Optionee located at 1140 Technology  Drive, 500 McCarthy
Blvd.,  900 Sumac  Drive,  1000 Sumac Drive,  and 1101 Sumac Drive,  in Milpitas
California.  Notwithstanding  the  foregoing,  if Optionee  purchases the Option
Property,  Optionor shall not be responsible  for the clean up or removal of any
such toxic wastes and/or Hazardous  Materials,  as Optionee is buying the Option
Property "as is" and shall assume any and all responsibility for same.

                  (4) The  obligations  of  Optionor  and  Optionee  under  this
Section F shall survive the expiration or earlier termination of this Agreement.

                  (5) If within thirty (30) days after this  Agreement is signed
by Optionor and Optionee,  any tests  performed by Optionee  disclose  Hazardous
Materials  or toxic  wastes in material  amounts  which  violate any laws to the
extent any governmental  entity could require an owner or occupier of the Option
Property to take any remedial  action with respect to such  materials or wastes,
then  Optionee  shall  have  the  right  by  written  notice  to  Optionor,   to
simultaneously  terminate  this Agreement and all other  agreements  between the
parties relative to the Option Property.  Optionor may elect, at Optionor's sole
and absolute  discretion,  to remediate or haul away the Hazardous  Materials or
toxic  waste.  In the  event  Optionor  elects  to  remediate  or haul  away the
Hazardous  Materials  or toxic  waste,  Optionee  will not  have the  option  to
terminate any of the Agreements as outlined above.

         F: RIGHTS AND  OBLIGATIONS  WITH RESPECT TO OPTION  PROPERTY:  Optionee
shall have the right to fence the Option  Property,  but except as  provided  in
this Section, Optionee shall not have the right to use the Option Property prior
to an exercise of the

                                                      Initial:  ALK  JA  NHC
                                                                ------------
                                      -12-

<PAGE>

option.  Optionee  shall,  for any portion of the Option  Property for which the
option  has not been  terminated,  either  arrange  to have such  portion of the
Option Property  farmed,  or periodically  disked to control the growth of weeds
and keep the Option Property neat and clean and free from debris of any kind and
all at  Optionee's  cost and  expense.  Optionor  agrees  not to grant any other
person or entity the right to use the Option Property  without the prior written
consent of Optionee, which shall not be unreasonably withheld or delayed.

         IN WITNESS WHEREOF,  the parties have executed this Agreement as of the
date last written below.

                           OPTIONOR:                                         
                           RICHARD T. PEERY SEPARATE PROPERTY TRUST
                           
                           By /s/ Richard T. Peery
                              --------------------------------------------------
                           Richard T. Peery, Trustee
                           
                           Date:  6/26/97
                              --------------------------------------------------
                           
                           JOHN ARRILLAGA SURVIVOR'S TRUST
                           
                           By /s/ John Arrillaga, Trustee
                              --------------------------------------------------
                           John Arrillaga, Trustee
                           
                           Dated:  6/30/97
                              --------------------------------------------------
                           
                           OPTIONEE:
                           
                           QUANTUM CORPORATION, 
                           a Delaware corporation
                           
                           By /s/ Andrew Kryder
                              --------------------------------------------------
                           Andrew Kryder, Vice President Finance and Corporate 
                           General Counsel 
                           
                           Dated: June 25, 1997
                              --------------------------------------------------
                           
                           By /s/ Norm Claus
                              --------------------------------------------------
                           Norm Claus, Vice President Real Estate and Corporate 
                           Services
                           
                           Date: June 25, 1997
                              --------------------------------------------------


                                                      Initial:  ALK  JA  NHC
                                                                ------------
                                      -13-
<PAGE>
                                                                       Quantum 5

                                AMENDMENT NO. 1
                                    TO LEASE

         THIS  AMENDMENT  NO. I is made and entered into this 16th day of April,
1997, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated
7/20/77  (JOHN  ARRILLAGA  SURVIVOR'S  TRUST)  (previously  known  as the  "John
Arrillaga Separate Property Trust") as amended,  and RICHARD T. PEERY,  Trustee,
or his Successor  Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE  PROPERTY
TRUST) as amended, collectively as LANDLORD, and QUANTUM CORPORATION, a Delaware
corporation, as TENANT.

                                    RECITALS

         A. WHEREAS,  by Lease Agreement dated March 23, 1994 Landlord leased to
Tenant all of that certain  94,484+  square foot building  located at 1101 Sumac
Drive,  Milpitas,  California,  the details of which are more  particularly  set
forth in said March 23, 1994 Lease Agreement, and

         B.  WHEREAS,  said Lease was amended by the  Commencement  Letter dated
December 15, 1994 which established the January 1, 1995 Commencement Date of the
Lease, and the Termination Date of September 30, 2006, and,

         C.  WHEREAS,  it is now the desire of the  parties  hereto to amend the
Lease by (i) extending the Term for five (5) years  pursuant to Lease  Paragraph
41 ("First  Five-Year Option to Extend"),  (ii) amending the Basic Rent schedule
and  Aggregate  Rent,  (iii)  adding a Third  Option to  Extend,  (vi)  amending
Paragraphs 47 ("Cross  Default") and 12  ("Property  Insurance"),  (v) replacing
Lease Paragraph 52 ("Structural Capital Costs Regulated by Governmental Agencies
After the  Commencement  of this Lease not Caused by Tenant or Tenant's  Uses or
Remodeling  of the  Premises"),  and  (vi)  amending  and/or  replacing  certain
provisions of the Lease  commencing as of the commencement of the Third Extended
Term of said Lease Agreement as hereinafter set forth.

                                   AGREEMENT

         NOW THEREFORE,  for valuable consideration,  receipt of which is hereby
acknowledged,  and in  consideration  of the hereinafter  mutual  promises,  the
parties hereto do agree as follows:

         1. TERM OF LEASE:  It is agreed  between  the  parties  that Tenant has
exercised its First  Five-Year  Option to Extend said Lease as detailed in Lease
Paragraph 41. Pursuant to the terms of said Paragraph 41, the Term of said Lease
Agreement  shall be  extended  for an  additional  five (5) year period from the
schedule  Lease  Termination  Date of September  30, 2006;  therefore  the Lease
Termination Date shall be changed from September 30, 2006 to September 30, 2011.

         2. CONCURRENT EXERCISE OF OPTION TO EXTEND: Pursuant to Lease Paragraph
40C ("Lease Terms  Co-Extensive"),  it is understood between the parties that if
Tenant  exercises its Option to Extend this Lease,  the terms of the Building 1,
Building 2, Building 3 and Building 4 Leases (the  "Existing  Leases") are to be
extended accordingly. The monthly Basic Rent during the extended term under each
of the Leases  shall be  increased  by $.05 per square foot on the  commencement
date of the extended term and  thereafter on each and every  anniversary  of the
respective lease commencement date;  therefore,  concurrently with the execution
of this  Amendment No. 1,  Landlord and Tenant shall  execute  amendments to the
Existing  Leases,  extending  the terms of each of the Existing  Leases for five
years pursuant to said lease's  respective First Five-Year Option to Extend.  It
is also  understood that in the event Tenant (i) exercises any of its Options to
Extend this Lease,  or if Tenant  exercises  any of its Options to Extend any of
the Existing Leases, each of the five Leases shall be extended accordingly.

         3. BASIC RENTAL FOR EXTENDED  TERM OF LEASE:  The monthly  Basic Rental
for the Extended Term of Lease shall be as follows:

         On October 1, 2006,  the sum of ONE HUNDRED  EIGHTY ONE  THOUSAND  FOUR
HUNDRED NINE AND 28/100 DOLLARS  ($181,409.28)  shall be due, and a like sum due
on the first day of each month  thereafter  through and  including  September 1,
2007.


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         On October 1, 2007,  the sum of ONE  HUNDRED  EIGHTY SIX  THOUSAND  ONE
HUNDRED THIRTY THREE AND 48/100 DOLLARS  ($186,133.48)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September I, 2008.

         On  October 1,  2008,  the sum of ONE  HUNDRED  NINETY  THOUSAND  EIGHT
HUNDRED FIFTY SEVEN AND 68/100  DOLLARS  ($190,857,68)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September 1, 2009.

         On October 1, 2009,  the sum of ONE HUNDRED  NINETY FIVE  THOUSAND FIVE
HUNDRED EIGHTY ONE AND 88/100 DOLLARS ($195,581.88) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2010.

         On October 1, 2010,  the sum of TWO HUNDRED  THOUSAND THREE HUNDRED SIX
AND 08/100 DOLLARS  ($200,306.08)  shall be due, and a like sum due on the first
day of each month thereafter through and including September 1,2011.

         The  Aggregate   Basic  Rent  for  the  Lease  shall  be  increased  by
$11,451,460.80 or from $21,171,029.88 to $32,622,490.68.

         4. THIRD FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the
Lease for an  additional  five (5) year period  pursuant to Lease  Paragraph  42
("Second Five Year Option To Extend"),  Landlord hereby grants to Tenant a third
option to extend the Term of this Lease for an  additional  five (5) year period
upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration of the Lease Term as extended pursuant to Lease Paragraph 42 ("Second
Five Year  Option To  Extend"),  in which  event the Lease  shall be  considered
extended  for an  additional  five (5) year  period  upon  the  same  terms  and
conditions as this Lease,  absent this  Paragraph 4 and subject to the Rental as
set forth  below.  In the event that Tenant  fails to timely  exercise  Tenant's
option as set forth herein in writing,  Tenant  shall have no further  option to
extend this Lease or the Other  Leases,  and this Lease  shall  continue in full
force and effect for the full remaining term hereof, absent this Paragraph 4.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

Period                               Monthly Basic Rent
- ------                               ------------------

Months 1-12                              $2.42/sf
Months 13-24                             $2.47/sf
Months 25-36                             $2.52/sf
Months 37-48                             $2.57/sf
Months 49-60                             $2.62/sf

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this  Paragraph 4 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 4 notwithstanding such non-curable default.

         5. CROSS DEFAULT: Notwithstanding anything to the contrary in Paragraph
47 of this Lease,  said Paragraph 47 is hereby amended to include the following:
"Landlord  shall have the option of  considering a default under this Lease or a
default  under any of the  Existing  Leases  (i.e.  the leases for  Building  1,
Building 2,  Building 3 and  Building  4)to be a default  under all such leases,
only with respect to such leases under which  Landlord is also the 'Landlord' at
the time such  default  occurs.  By way of example,  if at the time a default of
Tenant occurs under this Lease,  Landlord has sold the premises described in any
of the Existing Leases and is no longer the 'Landlord' thereunder, then a


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

default  under  this  Lease shall  not constitute  a  default  under any of such
Existing Leases so sold by Landlord (unless the premises leased under this Lease
and the Existing  Leases are sold to the same  entity),  and a default by Tenant
under any of such  Existing  Leases so sold by Landlord  shall not  constitute a
default  under this Lease or any other of the  Existing  Leases  then  remaining
between Landlord and Tenant.  However,  if the Landlord under this Lease and the
Existing  Leases  is one in the same at the  time of said  default,  said  cross
default provisions shall apply."

         6. PROPERTY  INSURANCE:  Lease  Paragraph 12 ("Property  Insurance") is
hereby amended to include the following:  "Tenant  acknowledges  that as part of
the cost of insurance  policies for the Premises,  Tenant is responsible for the
payment of  insurance  deductibles  on  insurance  claims as they  relate to the
Premises  subject to the  limitations  provided in Lease Paragraph 54 ("Property
Insurance")  which limitations are applicable only during the initial Lease Term
and the First Lease Extension Period and the Second Lease Extension Period. Said
limitation  provided  for  in  Lease  Paragraph  54 are  null  and  void  at the
commencement of the Third Lease Extended Term".

         7. STRUCTURAL  CAPITAL COSTS  REGULATED BY GOVERNMENTAL  AGENCIES AFTER
THE  COMMENCEMENT  OF THIS  LEASE  NOT  CAUSED BY  TENANT  OR  TENANT'S  USES OR
REMODELING  OF THE  PREMISES:  Lease  Paragraph 52  ("Structural  Capital  Costs
Regulated by  Governmental  Agencies  after the  Commencement  of this Lease Not
Caused by Tenant or Tenant's  Uses or  Remodeling  of the  Premises")  is hereby
deleted and replaced with the following:

                  "52.   STRUCTURAL  CAPITAL  COSTS  REGULATED  BY  GOVERNMENTAL
         AGENCIES AFTER THE  COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR
         TENANT'S USES OR  REMODELING  OF THE  PREMISES: The  provisions of this
         Paragraph 52 shall modify Paragraphs 7 and 14:

                  A. If (i) during the last five (5) years of the First Extended
         Term of the Lease if said Lease has not been  extended as provided  for
         in Lease  Paragraph  42  ("Second  Five Year  Option To  Extend") or in
         Paragraph  4  ("Third  Five  Year  Option  to  Extend")  above or Lease
         Paragraph  40C ("Lease Terms  Co-Extensive"),  or (ii) during either of
         the five (5) year extension  periods permitted by Lease Paragraph 42 or
         Paragraph 4 above, or Lease  Paragraph 40C above, it becomes  necessary
         (due to any  governmental  requirement  for continued  occupancy of the
         Premises) to make structural  improvements  required by laws enacted or
         legal  requirements   imposed  by  governmental   agency(s)  after  the
         Commencement  Date, and the cost for each required work or improvements
         exceeds $100,000, then if such legal requirement is not imposed because
         of Tenant's  specific  use of the Premises  and is not  "triggered"  by
         Tenant's  Alterations or Tenant's  application for a building permit or
         any other governmental  approval  (collectively  "Tenant's Actions") in
         which instance Tenant shall be responsible for 100% of the cost of such
         improvements, Landlord shall be responsible for paying the cost of such
         improvement  and  constructing  such  improvement,  subject  to a  cash
         contribution  from Tenant of a portion of the cost  thereof as provided
         for and calculated in Paragraph 52B.

                  B. When Landlord  makes an  improvement  pursuant to Paragraph
         52A,  and as a condition to  Landlord's  obligation  to construct  such
         improvement,  Tenant shall make the following  contribution  in cash to
         Landlord for the cost thereof prior to the  commencement of the work by
         Landlord.  It is agreed that Tenant  shall pay to Landlord  100% of the
         cost of the  first  $100,000.00  worth of each  improvement.  After the
         first  $100,000.00,  all costs above $100,000.00 shall be divided by 15
         and  multiplied by the time period  remaining in the last five years of
         the Lease Term from the date work on such improvement commences.

                  For example, if the improvement is not required as a result of
         Tenant's  Actions and if the cost of such  improvement was $400,000 and
         there was one year and six months  remaining in the Lease term when the
         work  commenced,  then  Tenant  would be  responsible  for  reimbursing
         Landlord in cash $130,000.00 computed as follows:


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

        Total Cost of Work                             $400,000.00
        Tenant Responsible for
        1st $100,000                                  - 100,000.00
        Total Amount To Be Amortized                   $300,000.00
        
        $300,00,0.00/15 = $20,000.00/yr. x 1.5 yrs =   $ 30,000.00
        
        Tenant responsible for $100,000 + $30,000.00 = $130,000.00
        
                  C. If Landlord  has made  improvements,  for which  Tenant has
         reimbursed Landlord for the cost thereof pursuant to Paragraph 52B, and
         the  term  of this  Lease  is  subsequently  extended  pursuant  to the
         exercise by Tenant of an option to renew pursuant to Lease Paragraph 42
         or  Paragraph 4 above,  upon the exercise of any such option by Tenant,
         Tenant  shall  pay to  Landlord  an  additional  sum equal to the total
         amount  of said  improvement  less the  amount  previously  paid for by
         Tenant.  Using the example in  Paragraph  52B above,  Tenant  would owe
         Landlord  the   additional   amount  of   $270,000.00   ($400,000.00  -
         $130,000.00 = $270,000.00)."

         8. THIRD OPTION PERIOD - LEASE PROVISION  CHANGES:  In the event Tenant
exercises  its Third Option to Extend as provided for in Paragraph 4 above,  the
following amendments  (contained within Paragraphs 9 through 18) are herein made
to the Lease to be effective  upon the  commencement  of the third option period
("Third Option  Period"),  or during any period  following the expiration of the
Lease  Term or  expiration  of the Lease  when  Tenant is in  possession  of the
Premises.

         9. LATE  CHARGE:  Effective  as of the  first  day of the Third  Option
Period,  the Late Charge referenced in Lease Paragraph 4.D ("Late Charge") shall
be changed from five percent (5 %) to ten percent (10%),  and Lease Paragraph 49
("Limitation on Late Charge") shall be deleted in its entirety and of no further
force or effect.

         10.  MANAGEMENT  FEE:  Notwithstanding  anything to the contrary in the
Lease,  effective  as of the first day of the Third  Option  Period,  and on the
first day of each month thereafter, Tenant shall pay to Landlord, in addition to
the Basic Rent and Additional Rent, a fixed monthly  management fee ("Management
Fee") equal to one percent  (1%) of the Basic Rent due for each month during the
Lease Term.

         11.  HAZARDOUS  MATERIALS:  Effective  as of the first day of the Third
Option Period,  Lease Paragraph 44 ("Hazardous  Materials")  shall be deleted in
its entirety and replaced with the following:

                  "44. HAZARDOUS MATERIALS: Landlord and Tenant agree as follows
         with  respect to the  existence  or use of  "Hazardous  Materials"  (as
         defined  herein) on, in, under or about the Premises and real  property
         located beneath said Premises, which includes the entire parcel of land
         on which the Premises are located as shown in Green on Exhibit A to the
         Lease (hereinafter collectively referred to as the "Property"):

                  A. As used herein,  the term "Hazardous  Materials" shall mean
         any  material,  waste,  chemical,  mixture  or  byproduct  which  is or
         hereafter is defined,  listed or designated  under  Environmental  Laws
         (defined below) as a pollutant,  or as a contaminant,  or as a toxic or
         hazardous  substance,  waste or  material,  or any  other  unwholesome,
         hazardous,   toxic,  biohazardous,   or  radioactive  material,  waste,
         chemical,  mixture  or  byproduct,  or which is  listed,  regulated  or
         restricted by any  Environmental  Law (including,  without  limitation,
         petroleum  hydrocarbons  or any distillates or derivatives or fractions
         thereof,  polychlorinated  biphenyls, or asbestos). As used herein, the
         term "Environmental  Laws" shall mean any applicable Federal,  State of
         California or local  government  law (including  common law),  statute,
         regulation,  rule,  ordinance,  permit,  license,  order,  requirement,
         agreement, or approval, or any determination,  judgment,  directive, or
         order of any  executive or judicial  authority at any level of Federal,
         State of California or local government


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         (whether now existing or subsequently adopted or promulgated)  relating
         to pollution or the  protection of the  environment,  ecology,  natural
         resources, or public health and safety.

                  B. Tenant shall notify Landlord prior to the occurrence of any
         Tenant's  Hazardous  Materials  Activities  (defined  below).  Landlord
         acknowledges  that Tenant  shall use,  in  compliance  with  applicable
         Environmental  Laws,  customary  household and office supplies  (Tenant
         shall first provide  Landlord with a list of said materials  use), such
         as mild cleaners,  lubricants and copier toner. Any and all of Tenant's
         Hazardous  Materials  Activities  shall be conducted in conformity with
         this Paragraph 44,  Paragraph 14 of this Lease,  and in compliance with
         all  Environmental  Laws  and  regulations.  As used  herein,  the term
         "Tenant's Hazardous Materials  Activities"  shall mean any and all use,
         handling,  generation,  storage, disposal,  treatment,  transportation,
         release,  discharge,  or emission of any  Hazardous  Materials  on, in,
         beneath,  to,  from,  at or about  the  Property,  in  connection  with
         Tenant's  use of  the  Property,  or by  Tenant  or by any of  Tenant's
         agents,  employees,  contractors,  vendors,  invitees,  visitors or its
         future  subtenants  or  assignees  or other  third  parties  (including
         "dumping"  by others) (or which  Hazardous  Materials  originate on the
         surface of the Premises any time on or after the  Commencement  Date of
         this Lease, but excluding  Hazardous Materials on the Premises prior to
         the Lease Commencement Date because of the storage,  use, disposal,  or
         transportation  of  such  materials  or  waste  by  any  of  Landlord's
         contractors or otherwise  arising out of construction work performed by
         or under the  direction of Landlord on the Premises and Landlord  shall
         be responsible for all required  actions with respect to such materials
         or wastes).  Tenant  agrees to provide  Landlord  with  prompt  written
         notice of any spill or release of  Hazardous  Materials at the Property
         during the term of the Lease of which Tenant becomes aware, and further
         agrees to provide  Landlord with prompt written notice of any violation
         of Environmental Laws in connection with Tenant's  Hazardous  Materials
         Activities  of  which  Tenant  becomes  aware.  If  Tenant's  Hazardous
         Materials  Activities involve Hazardous Materials other than normal use
         of  customary  household  and office  supplies,  Tenant  also agrees at
         Tenant's expense:  (i) to install such Hazardous Materials  monitoring,
         storage and  containment  devices as may be  required by  Environmental
         Laws,  regulations and/or governing agencies;  (ii) to provide Landlord
         with a written  inventory  of such  Hazardous  Materials,  including an
         update of same each year upon the anniversary  date of the Commencement
         Date of the Lease  ("Anniversary  Date"); and (iii) on each Anniversary
         Date to provide to Landlord  copies of all  documentation  and records,
         required by applicable  Environmental Laws to be prepared and submitted
         to  governmental  authorities,  relating  to  use at  the  Property  of
         Hazardous Materials or to Tenant's Hazardous Materials  Activities,  if
         any. If upon completion of Landlord's review of said  documentation and
         records,  Landlord reasonably questions if Tenant is in compliance with
         all applicable  Environmental  Laws with respect to Tenant's  Hazardous
         Materials  Activities,  Tenant agrees within thirty (30) days following
         receipt  of  written  notice  from  Landlord,  to  retain  a  qualified
         environmental  consultant,  acceptable to Landlord, to evaluate whether
         Tenant is in compliance  with all  applicable  Environmental  Laws with
         respect to Tenant's  Hazardous  Materials  Activities.  Tenant,  at its
         expense,  shall  submit to  Landlord a report  from such  environmental
         consultant  which  discusses the  environmental  consultant's  findings
         within two (2) months of each Anniversary Date. Tenant, at its expense,
         shall promptly undertake and complete any and all steps necessary,  and
         in full compliance with applicable Environmental Laws, to fully correct
         any and all problems or  deficiencies  identified by the  environmental
         consultant,  and promptly  provide  Landlord with  documentation of all
         such corrections.

                  C. Prior to termination or expiration of the Lease, Tenant, at
         its expense,  shall (i) properly remove from the Property all Hazardous
         Materials  which come to be located at the Property in connection  with
         Tenant's Hazardous Materials Activities, and (ii) fully comply with and
         complete all facility closure requirements of applicable  Environmental
         Laws regarding Tenant's Hazardous Materials  Activities,  including but
         not limited to (x) properly restoring and repairing the Property to the
         extent damaged by such closure  activities,  and (y) obtaining from the
         local Fire Department or other appropriate  governmental authority with
         any legal or regulatory jurisdiction a written concurrence that closure
         has been completed in compliance with applicable

                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>
                                                                       Quantum 5

         Enviroamental  Laws. Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any such closure activities.

                  D. If Landlord,  upon  consultation  with  Tenant,  reasonably
         concludes  that the  Property  has become  contaminated  as a result of
         Tenant's Hazardous  Materials  Activities,  Landlord in addition to any
         other rights it may have under this Lease or under  Environmental  Laws
         or other laws,  may enter upon the  Property  and  conduct  inspection,
         sampling  and  analysis,  including  but not limited to  obtaining  and
         analyzing  samples  of  soil  and  groundwater,   for  the  purpose  of
         determining the nature and extent of such  contamination  except to the
         extent  that  such  activities  may  be   inconsistent   with  Tenant's
         compliance with  Environmental  Laws.  Tenant shall promptly  reimburse
         Landlord  for the  costs of such an  investigation,  including  but not
         limited to reasonable  attorneys'  fees Landlord incurs with respect to
         such investigation to the extent, and only to the extent,  that it that
         discloses Hazardous Materials  contamination for which Tenant is liable
         under this Lease.  Except as may be  required  of Tenant by  applicable
         Environmental Laws, Tenant shall not perform any sampling,  testing, or
         drilling to identify  the  presence of any  Hazardous  Materials at the
         Property,  without  Landlord's prior written consent which shall not be
         unreasonably  withheld.  Tenant shall  promptly  provide  Landlord with
         copies of any claims,  notices,  work plans, data and reports prepared,
         received or  submitted  in  connection  with any  sampling,  testing or
         drilling performed pursuant to the preceding sentence.

                  E.  Tenant  shall   indemnify,   defend  (with  legal  counsel
         acceptable  to  Landlord,  whose  consent  shall  not  unreasonably  be
         withheld)  and  hold  harmless   Landlord,   its  employees,   assigns,
         successors, successors-in-interest, agents and representatives from and
         against  any and all claims  (including  but not limited to third party
         claims from a private  party or a government  authority),  liabilities,
         obligations,   losses,   causes  of   action,   demands,   governmental
         proceedings or directives, fines, penalties, expenses, costs (including
         but not  limited  to  reasonable  attorneys',  consultants'  and  other
         experts' fees and costs),  and damages,  which arise from or relate to:
         (i)  Tenant's  Hazardous  Materials  Activities;   (ii)  any  Hazardous
         Materials contamination caused by Tenant prior to the Commencement Date
         of the Lease;  or (iii) the breach of any  obligation  of Tenant  under
         this    Paragraph    44    (collectively,    "Tenant's    Environmental
         Indemnification"). Tenant's Environmental Indemnification shall include
         but is not limited to the  obligation  to promptly and fully  reimburse
         Landlord for losses in or reductions to rental  income,  and diminution
         in  fair  market  value  of  the   Property.   Tenant's   Environmental
         Indemnification  shall  further  include  but  is  not  limited  to the
         obligation  to  diligently  and properly  implement to  completion,  at
         Tenant's  expense,  any and all environmental  investigation,  removal,
         remediation,   monitoring,  reporting,  closure  activities,  or  other
         environmental   response  action  as  may  be  required  by  applicable
         Environmental  Laws,  regulations or governing agencies  (collectively,
         "Response Actions"). Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any Response Actions.

                  F.  Landlord  hereby makes the  following  representations  to
         Tenant, each of which is made only to the best of Landlord's  knowledge
         as of the date  Landlord  executes  this Lease,  without any inquiry or
         investigation  having been made or required by Landlord  regarding this
         subject,  nor does Landlord have any  obligation to investigate or make
         inquiry regarding the subject:

                  (1) The soil and ground  water on or under the  Premises  does
         not contain  Hazardous  Materials in amounts  which violate any laws to
         the extent that any  governmental  entity could require either Landlord
         or Tenant to take any remedial  action with  respect to such  Hazardous
         Materials.

                  (2)  During  the time that  Landlord  has owned the  Premises,
         Landlord  has  received  no notice  of (i) any  violation,  or  alleged
         violation,  of any law that has not been corrected to the  satisfaction
         of the appropriate  authority,  (ii) any pending claims relating to the
         presence of Hazardous  Material on the  Premises,  or (iii) any pending
         investigation by any governmental agency concerning the Premises


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>
                                                                       Quantum 5

         relating to Hazardous Materials.

                  G. Landlord and Tenant shall  each give  written notice to the
         other  as  soon as  reasonably  practicable  of (i)  any  communication
         received from any governmental authority concerning Hazardous Materials
         which  relates  to the  Premises,  and  (ii) any  contamination  of the
         Premises by Hazardous  Materials  which  constitutes a violation of any
         law.  Attached  as  Exhibit  "C" to the  Lease  is a list of  Hazardous
         Materials  that Tenant  intends to use at the  Premises.  If during the
         Lease Term Tenant  proposes  to use other  Hazardous  Materials  at the
         Premises,  Tenant shall inform  Landlord of such use,  identifying  the
         Hazardous  Materials and the manner of their use, storage and disposal,
         and  shall  agree  (i) to use,  store  and  dispose  of such  Hazardous
         Materials  strictly  in  compliance  with  all  laws,  regulations  and
         governing  agencies and (ii) that the  indemnity set forth in Paragraph
         44 shall be applicable to Tenant's use of such Hazardous Material.

                  H. Landlord or Tenant may, at any time, cause testing wells to
         be  installed  on the  Premises,  and may cause the ground  water to be
         tested to detect the presence of Hazardous  Material by the use of such
         tests as are then  customarily  used for such  purposes.  Testing wells
         installed by Tenant shall be paid for by Tenant.  If tests conducted by
         Landlord  disclose  that Tenant has violated any  Hazardous  Materials,
         laws,  or Tenant or  parties  on the  Premises  during the Term of this
         Lease have  contaminated  the  Premises  as  determined  by  regulatory
         agencies  pursuant  to  Hazardous  Materials  laws,  or that Tenant has
         liability to Landlord  pursuant to Paragraph 44A, then Tenant shall pay
         for 100 percent of the cost of the test and all related expense.  Prior
         to the  expiration  of the Lease Term,  Tenant shall remove any testing
         wells it has installed at the Premises,  and return the Premises to the
         condition  existing  prior to the  installation  of such wells,  unless
         Landlord  requests  in  writing  that  Tenant  leave all or some of the
         testing  wells in which  instance the wells  requested to be left shall
         not be removed.

                  I. If any tests  performed by Tenant or Landlord  prior to the
         Commencement  Date  disclose   Hazardous  Materials  at  the  Premises,
         Landlord  at its  expense  will  promptly  take all  reasonable  action
         required  by law  with  respect  to the  existence  of  such  Hazardous
         Materials at the Premises.  The Commencement  Date shall not be delayed
         because of such action by Landlord unless occupation of the Premises is
         prohibited by law.

                  J. The obligations of Landlord and Tenant under this Paragraph
         44 shall survive the  expiration or earlier  termination of the Term of
         this Lease.  The rights and  obligations  of  Landlord  and Tenant with
         respect to issues  relating  to  Hazardous  Materials  are  exclusively
         established by this Paragraph 44."

         12.  REAL  ESTATE  TAXES:  Effective  as of the  first day of the Third
Option Period,  Lease Paragraph 53 ("Real Estate Taxes") shall be deleted in its
entirety and replaced with the following:

                  "53.  REAL  PROPERTY  TAXES:  Paragraph  9 is  modified by the
         following:

                  A. The term "Real Property  Taxes" shall not include  charges,
         levies  or fees  directly  related  to the use,  storage,  disposal  or
         release of Hazardous  Materials on the Premises unless directly related
         to Tenant's  Activities  at this site or on other sites  leased  and/or
         owned by Tenant;  however,  Tenant shall be responsible  for general or
         special tax and/or assessments  (related to Hazardous  Materials and/or
         toxic waste)  imposed on the Property  provided said special tax and/or
         assessment is not imposed due to on-site  originated  contamination  on
         the  Property  (by third  parties not  related to Tenant)  prior to the
         Lease  Commencement  Date.  Subject to the terms and conditions  stated
         herein, Tenant shall be responsible for paying one hundred percent (100
         %) of said taxes and/or  assessments  allocated to the Property.

                  B. If any  assessments  for  public  improvements  are  levied
         against the Premises,  Landlord may elect either to pay the  assessment
         in full or to allow the  asessment to go to bond.  If Landlord pays the
         assessment in full, Tenant shall pay to Landlord or any


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         assignee  or  purchaser  of the  Premises  each  time  payment  of Real
         Property  Taxes  is made a sum  equal to that  which  would  have  been
         payable (as both  principal  and  interest)  had  Landlord  allowed the
         assessment to go to bond.

                  C.  Tenant at its cost shall have the right,  at any time,  to
         seek a  reduction  in the  assessed  valuation  of the  Premises  or to
         contest  any Real  Property  Taxes  that are to be paid by  Tenant.  If
         Tenant  seeks a reduction or contests  such Real  Property  Taxes,  the
         failure  on  Tenant's  part to pay such Real  Property  Taxes  being so
         contested  shall not  constitute  a default so long as Tenant  complies
         with the provisions of this  Paragraph.  Landlord shall not be required
         to join in any  proceeding  or  contest  brought  by Tenant  unless the
         provisions of any law require that the proceeding or contest be brought
         by or in the name of Landlord.  In that case Landlord shall join in the
         proceedlngs or contest or permit it to be brought in Landlord's name as
         long as Landlord is not  required  to bear any cost.  Tenant,  on final
         determination  of the proceeding or contest,  shall  immediately pay or
         discharge  its  share  of any Real  Property  Taxes  determined  by any
         decision  or  judgment  rendered,  together  with all  costs,  charges,
         interest,  and  penalties  incidental  to the decision or judgment.  If
         Tenant does not pay the Real  Property  Taxes when due  pursuant to the
         Lease and Tenant seeks a reduction or contests them as provided in this
         paragraph,  before the commencement of the proceeding or contest Tenant
         shall furnish to Landlord a surety bond in form reasonably satisfactory
         to Landlord issued by an insurance  company qualified to do business in
         California.  The  amount  of the bond  shall  equal  125 % of the total
         amount of Real  Property  Taxes in  dispute  and any such bond shall be
         assignable to any lender or purchaser of the  Premises.  The bond shall
         hold Landlord and the Premises  harmless from any damage arising out of
         the  proceeding or contest and shall insure the payment of any judgment
         that may be rendered."

         13.  PROPERTY  INSURANCE:  Effective  as of the  first day of the Third
Option Period,  section B of Lease Paragraph 54 ("Property  Insurance") shall be
deleted in its entirety and be of no further force or effect.

         14.  ASSIGNMENT  AND  SUBLETTING:  Effective as of the first day of the
Third Option Period,  Lease Paragraph 55 ("Assignment and Subletting")  shall be
deleted in its entirety and replaced with the following:

                  "55.  ASSIGNMENT AND SUBLETTING:  The following  modifications
         are made to Paragraph 16:

                  A. In the event that Tenant  seeks to make any  assignment  or
         sublease,  then  Landlord,  by  giving  Tenant  written  notice  of its
         election  within fifteen (15) days after  Tenant's  notice of intent to
         assign or sublease has been given to Landlord,  shall have the right to
         elect (i) to withhold its consent to such  assignment  or sublease,  as
         permitted  pursuant  to  Paragraph  16, or (ii) to permit  Tenant to so
         assign the Lease or sublease such part of the Premises,  in which event
         Tenant may do so, but without  being  released of its liability for the
         performance  of  all  of its  obligations  under  the  Lease,  and  the
         following  shall  apply  (except  the  following  shall  not apply to a
         "Permitted Transfer" described in Paragraph 56):

                  (1) If Tenant  assigns its  interest  in this  Lease,  then in
         addition to the rental provided for in this Lease,  Tenant shall pay to
         Landlord  fifty  percent  (50%)  of all Rent  and  other  consideration
         received  by  Tenant  over and above (i) the  assignee's  agreement  to
         assume  the  obligations  of  Tenant  under  this  Lease  and  (ii) all
         "Permitted   Transfer  Costs"  (as  defined  herein)  related  to  such
         assignment.  As used herein, the term "Permitted  Transfer Costs" shall
         mean all  reasonable  leasing  commissions  paid to third  parties  not
         affilliated  with Tenant in order to obtain the  assignment or sublease
         in question.

                  (2) If Tenant sublets all or part of the Premises, then Tenant
         shall pay to  Landlord in  addition  to the Rent  provided  for in this
         Lease fifty percent (50%) of the positive  difference,  if any, between
         (i) all rent and other consideration paid or provided


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         to  Tenant  by the  subtenant,  less  (ii) all Rent  paid by  Tenant to
         Landlord  pursuant  to this  Lease  which is  allotable  to the area so
         sublet and all Permitted Transfer Costs related to such sublease. After
         Tenant has recovered all Permitted  Transfer  Cost  Tenant shall pay to
         Landlord  the amount  specified in the  preceding  sentence on the same
         basis,  whether  periodic  or in lump  sum,  that  such  rent and other
         consideration is paid to Tenant by its subtenant, within seven (7) days
         after it is received by Tenant.

                  3) Tenant's  obligations under this subparagraph shall survive
         any  assignment  or  sublease.  At the time Tenant makes any payment to
         Landlord  required  by  this  subparagraph,  Tenant  shall  deliver  an
         itemized  statement of the method by which the amount to which Landlord
         is entitled was  calculated,  certified by Tenant as true  and correct.
         Landlord  shall have the right to inspect  Tenant's  books and  records
         relating  to the  payments  due  pursuant  to this  subparagraph.  Upon
         request therefor, Tenant shall deliver to Landlord copies of all bills,
         invoices or other documents upon which its calculations are based.

                  (4) As used herein,  the term  "consideration"  shall mean any
         consideration of any kind received,  or to be received (including,  but
         not limited to, services rendered and/or value received) by Tenant as a
         result of the assignment or sublease, if such sums are paid or provided
         to Tenant for Tenant's interest in this Lease or in the Premises.

                  (5)  This  Paragraph  55.A  does  not  apply  to a  "Permitted
         Transfer",  as provided in Paragraph 56 hereof.  The parties agree that
         if  any of the  following  transactions  occur  and do not  qualify  as
         "Permitted  Transfers",  Tenant must obtain Landlord's  consent to such
         transaction   and  if  Landlord   consents  to  any  of  the  following
         transactions  which do not otherwise qualify as "Permitted  Transfers",
         then the  provisions  of this  Paragraph  55.A  shall  not apply to the
         following   transactions:   (i)  a  merger,   consolidation   or  other
         reorganization in which Tenant is not the surviving corporation so long
         as 95 % of  all  assets  and  liabilities  of  Tenant  are  permanently
         transferred to such assignee; and (ii) an assignment of this Lease to a
         corporation  which purchases or otherwise  acquires 95 % or more of the
         assets of  Tenant  so long as 95 % of all  assets  and  liabilities  of
         Tenant are permanently  transferred to such assignee and Tenant remains
         liable and responsible  under the Lease to the extent Tenant  continues
         in existence following such transaction."

         15. PERMITtED ASSIGNMENTS AND SUBLEASES:  Effective as of the first day
of the Third Option  Period,  Lease  Paragraph 56  ("Permitted  Assignments  and
Subleases") shall be deleted in its entirety and replaced with the following:

                  "56.  PERMITtED  ASSIGNMENTS  AND  SUBLEASES:  Notwithstanding
         anything  contained  in  Paragraph  16,  so  long as  Tenant  otherwise
         complies with the provisions of Paragraph 16 and the Permitted Transfer
         does not release  Tenant  from its  obligations  hereunder,  Tenant may
         enter into any of the  following  transfers  (a  "Permitted  Transfer")
         without  Landlord's  prior  written  consent,  and  the  provisions  of
         Paragraph 55A shall not apply to any such Permitted Transfer:

                  A. Tenant may  sublease  all or part of the Premises or assign
         its  interest  in this  Lease to any  corporation  which  controls,  is
         controlled  by, or is under  common  control with Tenant by means of an
         ownership  interest of more than fifty percent (50 %) providing  Tenant
         remains  liable  for the  payment of Rent and full  performance  of the
         Lease;

                  B.  Tenant  may  assign  its   interest  in  the  Lease  to  a
         corporation  which  results  from  a  merger,  consolidation  or  other
         reorganization in which Tenant is not the surviving corporation so long
         as (i) 95 % of all assets  and  liabilities  of Tenant are  permanently
         transferred to such assignee, and (ii) immediately prior to the merger,
         consolidation  or other  reorganization,  the  corporation  into  which
         Tenant is to be merged has a net worth equal to or greater than the net
         worth of Tenant  at the time of Lease  execution or at the time of such
         assignment,  merger,  consolidation  or  reorganization  (whichever  is
         greater), or if it does not, Landlord is provided a guaranty


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         of the Lease  (in a form  reasonably  acceptable  to  Landlord)  from a
         corporation (a) that is the parent of, or is otherwise affiliated with,
         the corporation into which Tenant is to be merged,  and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the time of Lease execution or at the time of such assignment,  merger,
         consolidation or  reorganization  (whichever is greater).  In the event
         there is not a  permanent  transfer  of 95 % or more of the  assets and
         liabilities from Tenant to a third party, and Tenant continues to exist
         as a separate  entity,  both  companies  shall be jointly and severally
         liable for the full terms and conditions of the Lease;

                  C.  Tenant  may  assign  this  Lease  to a  corporation  which
         purchases or otherwise acquires 95 % or more of the assets of Tenant so
         long as 95 % of all assets and  liabilities  of Tenant are  permanently
         transferred  to such  assignee  (in the event  there is not a permanent
         transfer of 95 % or more of the assets and liabilities from Tenant to a
         third party and Tenant  continues to exist as a separate  entity,  both
         companies shall be jointly and severally  liable for the full terms and
         conditions of the Lease),  and provided that immediately  prior to such
         assignment said  corporation,  has a net worth equal to or greater than
         the net worth of Tenant  (a) at the time of Lease  execution  or (b) at
         the time of such assignment  (whichever is greater), or if it does not,
         Landlord  is  provided  a guaranty  of the Lease (in a form  reasonably
         acceptable to Landlord)  from a corporation  (a) that is the parent of,
         or is otherwise  affiliated  with, said corporation and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the  time  of  Lease  execution  or at the  time  of  such  assignment,
         (whichever is greater)."

         16.  DESTRUCTION:  Effective  as of the first  day of the Third  Option
Period, Lease Paragraph 61 ("Destruction")  shall be deleted in its entirety and
replaced with the following:

                  "61. DESTRUCTION: Paragraph 21 is modified by the following:

                  A.  Notwithstanding  anything to the contrary within Paragraph
         21,  Landlord  may  terminate  this Lease in the event of an  uninsured
         event or if insurance proceeds, net of the deductible, are insufficient
         to  cover  one  hundred  percent  of the  rebuilding  costs;  provided,
         however,  Tenant shall have the right to elect, in its  discretion,  to
         contribute such excess funds to permit Landlord to repair the Premises.

                  B. Except as  provided  in  Paragraph  61C,  Landlord  may not
         terminate  the Lease if the Premises are damaged by a peril whereby the
         cost to replace and/or repair is one hundred percent (100 %) covered by
         the insurance carried by Landlord pursuant to Paragraph 12, but instead
         shall restore the Premises in the manner described by Paragraph 21.

                  C. If the  Premises  are  damaged  by a peril  covered  by the
         insurance  carried by Landlord pursuant to Paragraph 12, Landlord shall
         have  the  option  to  terminate  the  Lease  if each of the  following
         conditions is satisfied:  (i) the cost to repair or the damage  exceeds
         thirty-three  percent  (33  %) of  the  then  replacement  cost  of the
         Premises;  and (ii) the damage occurs at a time when there is less than
         five (5) years remaining in the term of the Lease.

                  D. If Landlord fails to obtain insurance as required  pursuant
         to Paragraph 12, and said insurance  would have been available to cover
         any damage or destruction  to the Premises,  Landlord shall be required
         to rebuild,  at its cost, net of the  deductible  which would have been
         required  under  said  insurance  policy  (which  deductible  Tenant is
         required to pay).

                  E. If the Premises  are damaged by any peril,  then as soon as
         reasonably practicable,  Landlord shall furnish Tenant with the written
         opinion of Landlord's  architect or construction  consultant as to when
         the  restoration  work  required of Landlord may be  completed.  Tenant
         shall have the option to  terminate  this Lease in the event any of the
         following  occurs,  which option may be  exercised  only by delivery to
         Landlord of a written notice of election to terminate  within seven (7)
         days after  Tenant  receives  from  Landlord  the  estimate of the time
         needed to complete such


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         restoration:

                  (1) The  Premises are  damaged by  any peril (not caused by or
         resulting  from an  action of Tenant  or  Tenant's  agents,  employees,
         contractors or invitees)  and, in the reasonable  opinion of Landlord's
         architect or  construction  consultant,  the  restoration of the Leased
         Premises cannot be  substantially  completed  within 180 days after the
         date of such damage (subject to force majeure conditions); or

                  (2) The  Premises  are  damaged by any peril (not caused by or
         resulting  from an  action of Tenant  or  Tenant's  agents,  employees,
         contractors  or invitees)  within twelve (12) months of the last day of
         the Lease term, and, in the reasonable opinion of Landlord's  architect
         or  construction  consultant,  the  restoration of the Leased  Premises
         cannot be substantially completed within sixty (60) days after the date
         of such damage and Tenant has not  exercised  its Option to Extend said
         Term (or Extended Term as the case may be)."

         17.  LIABILITY  INSURANCE:  Effective  as of the first day of the Third
Option Period, the first sentence of Lease Paragraph 10 ("Liability  Insurance")
shall be deleted and replaced with the following:  "Tenant, at Tenant's expense,
agrees to keep in force  during  the Term of this  Lease a policy of  commercial
general liability insurance with combined single limit coverage of not less than
Two Million Dollars  ($2,000,000)  per occurrence for bodily injury and property
damage occurring in, on or about the Premises,  including parking and landscaped
areas."

         18. LIMITATION OF LIABILITY: Effective as of the first day of the Third
Option Period,  Lease Paragraph 36 ("Limitation of Liability")  shall be deleted
in its entirety and replaced with the following:

                  "36.  LIMITATION OF LIABILITY In consideration of the benefits
         accruing hereunder,  Tenant and all successors and assigns covenant and
         agree that,  in the event of any actual or alleged  failure,  breach or
         default hereunder by Landlord:

         (i) the sole and exclusive remedy shall be against Landlord's  interest
         in the Premises leased herein;
         (ii) no  partner of  Landlord  shall be sued or named as a party in any
         suit or action  (except as may be necessary to secure  jurisdiction  of
         the partnership);
         (iii) no  service  of  process  shall be made  against  any  partner of
         Landlord  (except as may be  necessary  to secure  jurisdiction  of the
         partnership);
         (iv) no partner of Landlord  shall be  required to answer or  otherwise
         plead to any service of process;
         (v) no judgment will be taken against any partner of Landlord;
         (vi) any judgment  taken against any partner of Landlord may be vacated
         and set aside at any time without hearing;
         (vii) no writ of  execution  will ever be levied  against the assets of
         any partner of Landlord;
         (viii) these covenants and agreements are enforceable  both by Landlord
         and also by any partner of Landlord.

                  Tenant  agrees  that  each  of  the  foregoing  covenants  and
         agreements  shall be  applicable  to any covenant or  agreement  either
         expressly  contained  in this  Lease or imposed by statute or at common
         law."

         EXCEPT AS MODIFIED HEREIN, all other terms,  covenants,  and conditions
of said March 23, 1994 Lease Agreement shall remain in full force and effect.
                                       |
                                       |
                                       |
                     (This Space Left Blank Intentionally)
                                       |
                                       |

                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>

                                                                       Quantum 5

         IN WITNESS  WHEREOF,  Landlord and Tenant have executed this  Amendment
No. I to Lease as of the day and year last written below.

LANDLORD:                                   TENANT:

JOHN ARRILLAGA SURVIVOR'S                   QUANTUM CORPORATION              
TRUST                                       a Delaware corporation           
                                                                             
                                                                             
By /s/ John Arrillaga                       By  /s/ Andrew Kryder            
   ------------------                           -----------------
John Arrillaga, Trustee                                                      
                                            Andrew Kryder                    
Date:  6/30/97                              Print or Type Name               
                                                                             
RICHARD T. PEERY SEPARATE                   Title: VP FINANCE AND CORP GENERAL
PROPERTY TRUST                                     COUNSEL

                                            Date:  6/25/97

By /s/ Richard T. Peery
   --------------------
Richard T. Peery, Trustee

Date: 6/26/97


                                                                            JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>
                                                                       Quantum 4
                                AMENDMENT NO. 1
                                    TO LEASE


         THIS  AMENDMENT  NO. 1 is made and entered into this 16th day of April,
1997, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated
7/20/77  (JOHN  ARRILLAGA  SURVIVOR'S  TRUST)  (previously  known  as the  "John
Arrillaga Separate Property Trust") as amended,  and RICHARD T. PEERY,  Trustee,
or his Successor  Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE  PROPERTY
TRUST) as amended, collectively as LANDLORD, and QUANTUM CORPORATION, a Delaware
corporation, as TENANT.

                                    RECITALS

         A. WHEREAS, by Lease Agreement dated September 17, 1990 Landlord leased
to Tenant all of that certain  101,253+/-  square foot building  located at 1000
Sumac Drive,  Milpitas,  California,  the details of which are more particularly
set forth in said September 17, 1990 Lease Agreement, and

         B.  WHEREAS,  said Lease was amended by the  Commencement  Letter dated
December 6, 1991 which established the December 6, 1991 Lease Commencement Date,
and established the Termination Date of September 30, 2006, and,

         C.  WHEREAS,  it is now the desire of the  parties  hereto to amend the
Lease by (i) extending the Term for five years,  changing the  Termination  Date
from  September  30, 2006 to September  30, 2011,  (ii)  amending the Basic Rent
schedule and Aggregate Rent  accordingly,  (iii) adding a third Five Year Option
to Extend,  (iv) replacing  Paragraphs 40C ("Lease Terms  Co-extensive")  and 47
("Cross  Default") and 52  ("Structural  Capital Costs Regulated by Governmental
Agencies After the  Commencement  of this Lease not Caused by Tenant or Tenant's
Uses or Remodeling of the Premises"), (v) amending Lease Paragraph 12 ("Property
Insurance") and (vi) amending and/or replacing  certain  provisions of the Lease
commencing as of the  commencement  of the Third  Extended Term of said Lease as
hereinafter set forth.

                                   AGREEMENT

         NOW THEREFORE,  for valuable consideration,  receipt of which is hereby
acknowledged,  and in  consideration  of the hereinafter  mutual  promises,  the
parties hereto do agree as follows:

         1. TERM OF LEASE:  It is agreed  between  the  parties  that Tenant has
exercised  its First  Five-Year  Option to Extend the lease term of that certain
lease agreement  dated March 23, 1994 for premises  located at 1101 Sumac Drive,
Milpitas,  California  (the "Building 5 Lease"),  as detailed in Paragraph 41 of
said Building 5 Lease.  Paragraph 40C of said Building 5 Lease  provides that in
the  event  the  term of  said  Building  5 Lease  is  extended  for any  reason
whatsoever,  the terms of the  Existing  Leases  (i.e.  two of said leases dated
October  31,  1989 are for  Premises  located at 1140  Technology  Drive and 500
McCarthy Blvd.,  Milpitas,  California  (the "1989 Leases");  one of said leases
dated September 17, 1990 is for Premises located at 1000 Sumac Drive,  Milpitas,
California,  and one of said leases dated April 10, 1992 is for Premises located
at 900 Sumac  Drive,  Milpitas,  California)  shall also be extended so that all
five Leases expire on the same date; therefore, it is agreed between the parties
that by  exercising  its  Option to Extend the  Building 5 Lease,  Tenant has in
effect exercised its Option to Extend under Lease Paragraph 41 ("First Five-Year
Option to Extend"),  and that  pursuant to said Lease  Paragraph 41, the Term of
this Lease  Agreement  shall be extended for an additional five (5) year period,
and the Lease  Termination  Date shall be changed  from  September  30,  2006 to
September 30, 2011.

         2. BASIC RENTAL FOR FIRST  EXTENDED  TERM OF LEASE:  The monthly  Basic
Rental for the First Extended Term of Lease shall be as follows:

         On October 1, 2006,  the sum of ONE HUNDRED  EIGHTY FIVE  THOUSAND  TWO

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                                                              Initial:  ALK
                                                                      ----------
                                     Page 1

<PAGE>
                                                                       Quantum 4

HUNDRED NINETY TWO AND 99/100 DOLLARS ($185,292.99) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2007.

         On  October 1,  2007,  the sum of ONE  HUNDRED  NINETY  THOUSAND  THREE
HUNDRED FIFTY FIVE AND 64/100 DOLLARS ($190,355.64) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2008.

         On October 1, 2008,  the sum of ONE HUNDRED  NINETY FIVE  THOUSAND FOUR
HUNDRED EIGHTEEN AND 29/100 DOLLARS  ($195,418.29)  shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2009.

         On October 1, 2009, the sum of TWO HUNDRED THOUSAND FOUR HUNDRED EIGHTY
AND 94/100 DOLLARS  ($200,480.94)  shall be due, and a like sum due on the first
day of each month thereafter through and including September 1, 2010.

         On October 1, 2010,  the sum of TWO HUNDRED FIVE  THOUSAND FIVE HUNDRED
FORTY THREE AND 59/100 DOLLARS ($205,543.59) shall be due, and a like sum due on
the first day of each month thereafter through and including September 1,2011.

         The  Aggregate   Basic  Rent  for  the  Lease  shall  be  increased  by
$11,725,097.40 or from $25,686,182.83 to $37,411,280.23.

         3. THIRD FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the
Lease for an  additional  five (5) year period  pursuant to Lease  Paragraph  42
("Second Five Year Option To Extend"),  Landlord hereby grants to Tenant a third
option to extend the Term of this Lease for an  additional  five (5) year period
upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration of the Lease Term as extended pursuant to Lease Paragraph 42 ("Second
Five Year  Option To  Extend"),  in which  event the Lease  shall be  considered
extended  for an  additional  five (5) year  period  upon  the  same  terms  and
conditions as this Lease,  absent this  Paragraph 3 and subject to the Rental as
set forth  below.  In the event that Tenant  fails to timely  exercise  Tenant's
option as set forth herein in writing,  Tenant  shall have no further  option to
extend this Lease or the Other  Leases,  and this Lease  shall  continue in full
force and effect for the full remaining term hereof, absent this Paragraph 3.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

            Period                               Monthly Basic Rent
            ------                               ------------------
            
            Months 1-12                              $2.33/sf
            Months 13-24                             $2.38/sf
            Months 25-36                             $2.43/sf
            Months 37-48                             $2.48/sf
            Months 49-60                             $2.53/sf

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this  Paragraph 3 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 3 notwithstanding such non-curable default.

         4.  LEASE  TERMS  CO-EXTENSIVE:   Lease  Paragraph  40C  ("Lease  Terms
Co-extensive")  is  hereby  deleted  in  its  entirety  and  replaced  with  the
following:

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 2

<PAGE>

                                                                       Quantum 4

                  "40C. LEASE TERMS  CO-EXTENSIVE:  It is acknowledged  that (i)
         Landlord and Tenant have  previously  executed four separate  leases in
         addition to this Lease:  one of said leases  dated  October 31, 1989 is
         for Premises  located at 1140 Technology  Drive,  Milpitas,  California
         (the  "Building One Lease");  one of said leases dated October 31, 1989
         is for Premises  located at 500 McCarthy  Blvd.,  Milpitas,  California
         (the "Building Two Lease");  one of said leases dated April 10, 1992 is
         for Premises  located at 900 Sumac  Drive,  Milpitas,  California  (the
         "Building 3 Lease"); and one of said leases dated March 23, 1994 is for
         premises  located  at  1101  Sumac  Drive,  Milpitas,  California  (the
         "Building 5 Lease") (hereinafter collectively referred to as the "Other
         Leases");  and (ii) it is the intention of the parties that the term of
         this Lease be co-extensive with the term of the Other Leases, such that
         the terms of all five leases  ("the  Leases")  expire on the same date.
         The provisions of this Paragraph 40C also requires the terms of all the
         Leases to be extended  accordingly  if Tenant  exercises  its Option to
         Extend  under any of the  Leases.  The  monthly  Basic Rent  during the
         extended  term under each of the Leases  shall be increased by $.05 per
         square  foot  on  the  commencement  date  of  the  extended  term  and
         thereafter  on each and every  anniversary  of the  respective  lease's
         commencement date of the extended term."

         5.  CROSS  DEFAULT:  Lease  Paragraph  47 ("Cross  Default")  is hereby
deleted in its entirety and replaced with the following:

                  "47. CROSS DEFAULT:  It is agreed between  Landlord and Tenant
         that a default  under this Lease,  or a default  under any of the Other
         Leases may, at the option of Landlord,  be  considered a default  under
         all Leases,  in which event Landlord shall be entitled (but in no event
         required) to apply all rights and remedies of Landlord  under the terms
         of one lease to all the Leases including, but not limited to, the right
         to  terminate  any or all of the  aforementioned  Other  Leases or this
         Lease by reason of a default under the Leases or hereunder.

                  Notwithstanding  the above,  Landlord shall have the option of
         considering  a default  under this Lease or a default  under any of the
         Other Leases to be a default  under all such leases,  only with respect
         to such leases under which  Landlord is also the 'Landlord' at the time
         such  default  occurs.  By way of example,  if at the time a default of
         Tenant  occurs  under  this  Lease,  Landlord  has  sold  the  premises
         described  in any of the Other  Leases and is no longer the  'Landlord'
         thereunder,  then a default  under this Lease  shall not  constitute  a
         default under any of such Other Leases so sold by Landlord  (unless the
         premises  leased  under this Lease and the Other Leases are sold to the
         same entity), and a default by Tenant under any of such Other Leases so
         sold by Landlord shall not constitute a default under this Lease or any
         other of the Other Leases then remaining  between  Landlord and Tenant.
         However,  if the Landlord  under this Lease and the other Leases is one
         in the same at the time of said default,  said cross default provisions
         shall apply."

         6. STRUCTURAL  CAPITAL COSTS  REGULATED BY GOVERNMENTAL  AGENCIES AFTER
THE  COMMENCEMENT  OF THIS  LEASE  NOT  CAUSED BY  TENANT  OR  TENANT'S  USES OR
REMODELING  OF THE  PREMISES:  Lease  Paragraph 52  ("Structural  Capital  Costs
Regulated by  Governmental  Agencies  after the  Commencement  of this Lease Not
Caused by Tenant or Tenant's  Uses or  Remodeling  of the  Premises")  is hereby
deleted and replaced with the following:

                  "52.   STRUCTURAL  CAPITAL  COSTS  REGULATED  BY  GOVERNMENTAL
         AGENCIES AFTER THE  COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR
         TENANT'S USES OR REMODELING  OF THE  PREMISES:  The  provisions of this
         Paragraph 52 shall modify Paragraphs 7 and 14:

                  A. If (i) during the last five (5) years of the First Extended
         Term of the Lease if said Lease has not been  extended as provided  for
         in Lease  Paragraph  42  ("Second  Five Year  Option To  Extend") or in
         Paragraph 3 ("Third Five Year Option to Extend")

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 3

<PAGE>
                                                                       Quantum 4

         or  Paragraph  4 ("Lease  Terms  Co-Extensive")  above,  or (ii) during
         either  of the five  (5)  year  extension  periods  permitted  by Lease
         Paragraph 42 or Paragraph 3, or Paragraph 4 above, it becomes necessary
         (due to any  governmental  requirement  for continued  occupancy of the
         Premises) to make structural  improvements  required by laws enacted or
         legal  requirements   imposed  by  governmental   agency(s)  after  the
         Commencement  Date, and the cost for each required work or improvements
         exceeds $100,000, then if such legal requirement is not imposed because
         of Tenant's  specific  use of the Premises  and is not  "triggered"  by
         Tenant's  Alterations or Tenant's  application for a building permit or
         any other governmental  approval  (collectively  "Tenant's Actions") in
         which  instance  Tenant shall be  responsible  for  100% of the cost of
         such improvements, Landlord shall be responsible for paying the cost of
         such improvement and constructing such  improvement,  subject to a cash
         contribution  from Tenant of a portion of the cost  thereof as provided
         for and calculated in Paragraph 52B.

                  B. When Landlord  makes an  improvement  pursuant to Paragraph
         52A,  and as a condition to  Landlord's  obligation  to construct  such
         improvement,  Tenant shall make the following  contribution  in cash to
         Landlord for the cost thereof prior to the  commencement of the work by
         Landlord.  It is agreed that Tenant  shall pay to Landlord  100% of the
         cost of the  first  $100,000.00  worth of each  improvement.  After the
         first  $100,000.00,  all costs above $100,000.00 shall be divided by 15
         and  multiplied by the time period  remaining in the last five years of
         the Lease Term from the date work on such improvement commences.

                  For example, if the improvement is not required as a result of
         Tenant's  Actions and if the cost of such  improvement was $400,000 and
         there was one year and six months  remaining in the Lease term when the
         work  commenced,  then  Tenant  would be  responsible  for  reimbursing
         Landlord in cash $130,000.00 computed as follows:

              Total Cost of Work                             $400,000.00     
              Tenant Responsible for                                       
                1st $100,000                                 -100,000.00
                                                             -----------
              Total Amount To Be Amortized                   $300,000.00  
                                                                
                                                                           
                                                             
              $300,000.00/15 = $20,000.00/yr. x 1.5 yrs =    $ 30,000.00
              
              Tenant responsible for $100,000 + $30,000.00 = $130,000.00
          
                  C. If Landlord  has made  improvements,  for which  Tenant has
         reimbursed Landlord for the cost thereof pursuant to Paragraph 52B, and
         the  term  of this  Lease  is  subsequently  extended  pursuant  to the
         exercise by Tenant of an option to renew pursuant to Lease Paragraph 42
         or  Paragraph 3 above,  upon the exercise of any such option by Tenant,
         Tenant  shall  pay to  Landlord  an  additional  sum equal to the total
         amount  of said  improvement  less the  amount  previously  paid for by
         Tenant.  Using the example in  Paragraph  52B above,  Tenant  would owe
         Landlord  the   additional   amount  of   $270,000.00   ($400,000.00  -
         $130,000.00 = $270,000.00)."

        7. PROPERTY  INSURANCE:  Lease  Paragraph 12 ("Property  Insurance")  is
hereby amended to include the following:  "Tenant  acknowledges  that as part of
the cost of insurance  policies for the Premises,  Tenant is responsible for the
payment of  insurance  deductibles  on  insurance  claims as they  relate to the
Premises  subject to the  limitations  provided in Lease Paragraph 54 ("Property
Insurance")  which limitations are applicable only during the initial Lease Term
and the First Lease Extension Period and the Second Lease Extension Period. Said
limitation  provided  for  in  Lease  Paragraph  54 are  null  and  void  at the
commencement of the Third Lease Extended Term".

         8. THIRD OPTION PERIOD - LEASE PROVISION  CHANGES:  In the event Tenant
exercises  its Third Option to Extend as provided for in Paragraph 3 above,  the
following amendments  (contained within Paragraphs 9 through 19) are herein made
to the Lease to be effective  upon the  commencement  of the third option period
("Third Option Period"), or during any period fo11owing the

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                                     Page 4

<PAGE>

                                                                       Quantum 4

expiration  of the  Lease  Term or  expiration  of the Lease  when  Tenant is in
possession of the Premises.

         9. LATE  CHARGE:  Effective  as of the  first  day of the Third  Option
Period,  the Late Charge referenced in Lease Paragraph 4.D ("Late Charge") shall
be changed from five percent (5%) to ten percent (10%),  and Lease  Paragraph 49
("Limitation on Late Charge") shall be deleted in its entirety and of no further
force or effect.

         10.  MANAGEMENT  FEE:  Notwithstanding  anything to the contrary in the
Lease,  effective  as of the first day of the Third  Option  Period,  and on the
first day of each month thereafter, Tenant shall pay to Landlord, in addition to
the Basic Rent and Additional Rent, a fixed monthly  management fee ("Management
Fee") equal to one percent  (1%) of the Basic Rent due for each month during the
Lease Term.

         11.  HAZARDOUS  MATERIALS:  Effective  as of the first day of the Third
Option Period,  Lease Paragraph 44 ("Hazardous  Materials")  shall be deleted in
its entirety and replaced with the following:

                  "44. HAZARDOUS MATERIALS: Landlord and Tenant agree as follows
         with  respect to the  existence  or use of  "Hazardous  Materials"  (as
         defined  herein) on, in, under or about the Premises and real  property
         located beneath said Premises, which includes the entire parcel of land
         on which the Premises are located as shown in Green on Exhibit A to the
         Lease (hereinafter collectively referred to as the "Property"):

                  A. As used herein,  the term "Hazardous  Materials" shall mean
         any  material,  waste,  chemical,  mixture  or  byproduct  which  is or
         hereafter is defined,  listed or designated  under  Environmental  Laws
         (defined below) as a pollutant,  or as a contaminant,  or as a toxic or
         hazardous  substance,  waste or  material,  or any  other  unwholesome,
         hazardous,   toxic,  biohazardous,   or  radioactive  material,  waste,
         chemical,  mixture  or  byproduct,  or which is  listed,  regulated  or
         restricted by any  Environmental  Law (including,  without  limitation,
         petroleum  hydrocarbons  or any distillates or derivatives or fractions
         thereof,  polychlorinated  biphenyls, or asbestos). As used herein, the
         term "Environmental  Laws" shall mean any applicable Federal,  State of
         California or local  government  law (including  common law),  statute,
         regulation,  rule,  ordinance,  permit,  license,  order,  requirement,
         agreement, or approval, or any determination,  judgment,  directive, or
         order of any  executive or judicial  authority at any level of Federal,
         State of  California  or local  government  (whether  now  existing  or
         subsequently  adopted or  promulgated)  relating  to  pollution  or the
         protection of the environment,  ecology,  natural resources,  or public
         health and safety.

                  B. Tenant shall notify Landlord prior to the occurrence of any
         Tenant's  Hazardous  Materials  Activities  (defined  below).  Landlord
         acknowledges  that Tenant  shall use,  in  compliance  with  applicable
         Environmental  Laws,  customary  household and office supplies  (Tenant
         shall first provide  Landlord with a list of said materials  use), such
         as mild cleaners,  lubricants and copier toner. Any and all of Tenant's
         Hazardous  Materials  Activities  shall be conducted in conformity with
         this Paragraph 44,  Paragraph 14 of this Lease,  and in compliance with
         all  Environmental  Laws  and  regulations.  As used  herein,  the term
         "Tenant's Hazardous  Materials  Activities" shall mean any and all use,
         handling,  generation,  storage, disposal,  treatment,  transportation,
         release,  discharge,  or emission of any  Hazardous  Materials  on, in,
         beneath,  to,  from,  at or about  the  Property,  in  connection  with
         Tenant's  use of  the  Property,  or by  Tenant  or by any of  Tenant's
         agents,  employees,  contractors,  vendors,  invitees,  visitors or its
         future  subtenants  or  assignees  or other  third  parties  (including
         "dumping"  by others) (or which  Hazardous  Materials  originate on the
         surface of the Premises any time on or after the  Commencement  Date of
         this Lease, but excluding  Hazardous Materials on the Premises prior to
         the Lease Commencement Date because of the storage,  use, disposal,  or
         transportation  of  such  materials  or  waste  by  any  of  Landlord's
         contractors or otherwise  arising out of construction work performed by
         or under the  direction of Landlord on the Premises and Landlord  shall
         be responsible for

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                                     Page 5

<PAGE>

                                                                       Quantum 4

         all required actions with respect to such materials or wastes).  Tenant
         agrees to provide  Landlord with prompt  written notice of any spill or
         release of Hazardous  Materials at the Property  during the term of the
         Lease of which  Tenant  becomes  aware,  and further  agrees to provide
         Landlord with prompt written  notice of any violation of  Environmental
         Laws in connection  with  Tenant's  Hazardous  Materials  Activities of
         which Tenant becomes aware. If Tenant's Hazardous Materials  Activities
         involve  Hazardous   Materials  other  than  normal  use  of  customary
         household and office supplies,  Tenant also agrees at Tenant's expense:
         (i)  to  install  such  Hazardous  Materials  monitoring,  storage  and
         containment   devices  as  may  be  required  by  Environmental   Laws,
         regulations and/or governing agencies;  (ii) to provide Landlord with a
         written inventory of such Hazardous  Materials,  including an update of
         same each year upon the anniversary  date of the  Commencement  Date of
         the Lease  ("Anniversary  Date"); and (iii) on each Anniversary Date to
         provide to Landlord copies of all documentation  and records,  required
         by  applicable  Environmental  Laws to be  prepared  and  submitted  to
         governmental authorities,  relating to use at the Property of Hazardous
         Materials or to Tenant's  Hazardous  Materials  Activities,  if any. If
         upon completion of Landlord's review of said documentation and records,
         Landlord  reasonably  questions  if  Tenant is in  compliance  with all
         applicable  Environmental  Laws  with  respect  to  Tenant's  Hazardous
         Materials  Activities,  Tenant agrees within thirty (30) days following
         receipt  of  written  notice  from  Landlord,  to  retain  a  qualified
         environmental  consultant,  acceptable to Landlord, to evaluate whether
         Tenant is in compliance  with all  applicable  Environmental  Laws with
         respect to Tenant's  Hazardous  Materials  Activities.  Tenant,  at its
         expense,  shall  submit to  Landlord a report  from such  environmental
         consultant  which  discusses the  environmental  consultant's  findings
         within two (2) months of each Anniversary Date. Tenant, at its expense,
         shall promptly undertake and complete any and all steps necessary,  and
         in full compliance with applicable Environmental Laws, to fully correct
         any and all problems or  deficiencies  identified by the  environmental
         consultant,  and promptly  provide  Landlord with  documentation of all
         such corrections.

                  C. Prior to termination or expiration of the Lease, Tenant, at
         its expense,  shall (i) properly remove from the Property all Hazardous
         Materials  which come to be located at the Property in connection  with
         Tenant's Hazardous Materials Activities, and (ii) fully comply with and
         complete all facility closure requirements of applicable  Environmental
         Laws regarding Tenant's Hazardous Materials  Activities,  including but
         not limited to (x) properly restoring and repairing the Property to the
         extent damaged by such closure  activities,  and (y) obtaining from the
         local Fire Department or other appropriate  governmental authority with
         any legal or regulatory jurisdiction a written concurrence that closure
         has been completed in compliance  with applicable  Environmental  Laws.
         Tenant  shall  promptly  provide  Landlord  with  copies of any claims,
         notices,  work plans, data and reports prepared,  received or submitted
         in connection with any such closure activities.

                  D. If Landlord,  upon  consultation  with  Tenant,  reasonably
         concludes  that the  Property  has become  contaminated  as a result of
         Tenant's Hazardous  Materials  Activities,  Landlord in addition to any
         other rights it may have under this Lease or under  Environmental  Laws
         or other laws,  may enter upon the  Property  and  conduct  inspection,
         sampling  and  analysis,  including  but not limited to  obtaining  and
         analyzing  samples  of  soil  and  groundwater,   for  the  purpose  of
         determining the nature and extent of such  contamination  except to the
         extent  that  such  activities  may  be   inconsistent   with  Tenant's
         compliance with  Environmental  Laws.  Tenant shall promptly  reimburse
         Landlord  for the  costs of such an  investigation,  including  but not
         limited to reasonable  attorneys'  fees Landlord incurs with respect to
         such investigation to the extent, and only to the extent,  that it that
         discloses Hazardous Materials  contamination for which Tenant is liable
         under this Lease.  Except as may be  required  of Tenant by  applicable
         Environmental Laws, Tenant shall not perform any sampling,  testing, or
         drilling to identify  the  presence of any  Hazardous  Materials at the
         Property,  without  Landlord's prior written consent which shall not be
         unreasonably  withheld.  Tenant shall  promptly  provide  Landlord with
         copies of any claims,  notices,  work plans, data and reports prepared,
         received or  submitted  in  connection  with any  sampling,  testing or
         drilling performed pursuant to the preceding sentence.
                                       
                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 6

<PAGE>

                                                                       Quantum 4

                  E.  Tenant  shall   indemnify,   defend  (with  legal  counsel
         acceptable  to  Landlord,  whose  consent  shall  not  unreasonably  be
         withheld)  and  hold  harmless   Landlord,   its  employees,   assigns,
         successors, successors-in-interest, agents and representatives from and
         against  any and all claims  (including  but not limited to third party
         claims from a private  party or a government  authority),  liabilities,
         obligations,   losses,   causes  of   action,   demands,   governmental
         proceedings or directives, fines, penalties, expenses, costs (including
         but not  limited  to  reasonable  attorneys',  consultants'  and  other
         experts' fees and costs),  and damages,  which arise from or relate to:
         (i)  Tenant's  Hazardous  Materials  Activities;   (ii)  any  Hazardous
         Materials contamination caused by Tenant prior to the Commencement Date
         of the Lease;  or (iii) the breach of any  obligation  of Tenant  under
         this    Paragraph    44    (collectively,    "Tenant's    Environmental
         Indemnification"). Tenant's Environmental Indemnification shall include
         but is not limited to the  obligation  to promptly and fully  reimburse
         Landlord for losses in or reductions to rental  income,  and diminution
         in  fair  market  value  of  the   Property.   Tenant's   Environmental
         Indemnification  shall  further  include  but  is  not  limited  to the
         obligation  to  diligently  and properly  implement to  completion,  at
         Tenant's  expense,  any and all environmental  investigation,  removal,
         remediation,   monitoring,  reporting,  closure  activities,  or  other
         environmental   response  action  as  may  be  required  by  applicable
         Environmental  Laws,  regulations or governing agencies  (collectively,
         "Response Actions"). Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any Response Actions.

                  F.  Landlord  hereby makes the  following  representations  to
         Tenant, each of which is made only to the best of Landlord's  knowledge
         as of the date  Landlord  executes  this Lease,  without any inquiry or
         investigation  having been made or required by Landlord  regarding this
         subject,  nor does Landlord have any  obligation to investigate or make
         inquiry regarding the subject:

                           (1)  The  soil  and  ground  water  on or  under  the
         Premises does not contain Hazardous  Materials in amounts which violate
         any laws to the  extent  that any  governmental  entity  could  require
         either  Landlord or Tenant to take any remedial  action with respect to
         such Hazardous Materials.

                           (2)  During  the time  that  Landlord  has  owned the
         Premises,  Landlord  has  received no notice of (i) any  violation,  or
         alleged  violation,  of any law  that  has not  been  corrected  to the
         satisfaction  of the  appropriate  authority,  (ii) any pending  claims
         relating to the  presence of  Hazardous  Material on the  Premises,  or
         (iii) any pending  investigation by any governmental  agency concerning
         the Premises relating to Hazardous Materials.

                  G.  Landlord and Tenant shall each give written  notice to the
         other  as  soon as  reasonably  practicable  of (i)  any  communication
         received from any governmental authority concerning Hazardous Materials
         which  relates  to the  Premises,  and  (ii) any  contamination  of the
         Premises by Hazardous  Materials  which  constitutes a violation of any
         law.  Attached  as  Exhibit  "C" to the  Lease  is a list of  Hazardous
         Materials  that Tenant  intends to use at the  Premises.  If during the
         Lease Term Tenant  proposes  to use other  Hazardous  Materials  at the
         Premises,  Tenant shall inform  Landlord of such use,  identifying  the
         Hazardous  Materials and the manner of their use, storage and disposal,
         and  shall  agree  (i) to use,  store  and  dispose  of such  Hazardous
         Materials  strictly  in  compliance  with  all  laws,  regulations  and
         governing  agencies and (ii) that the  indemnity set forth in Paragraph
         44 shall be applicable to Tenant's use of such Hazardous Material.

                  H. Landlord or Tenant may, at any time, cause testing wells to
         be  installed  on the  Premises,  and may cause the ground  water to be
         tested to detect the presence of Hazardous  Material by the use of such
         tests as are then  customarily  used for such  purposes.  Testing wells
         installed by Tenant shall be paid for by Tenant.  If tests conducted by
         Landlord  disclose  that Tenant has  violated any  Hazardous  Materials
         laws,  or Tenant or  parties  on the  Premises  during the Term of this
         Lease have  contaminated  the  Premises  as  determined  by  regulatory
         agencies  pursuant  to  Hazardous  Materials  laws,  or that Tenant has
         liability to Landlord pursuant to Paragraph 44A,

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 7

<PAGE>
                                                                       Quantum 4

         then  Tenant  shall pay for 100 percent of the cost of the test and all
         related  expense.  Prior to the  expiration  of the Lease Term,  Tenant
         shall remove any testing wells it has  installed at the  Premises,  and
         return the Premises to the condition existing prior to the installation
         of such wells,  unless  Landlord  requests in writing that Tenant leave
         all or some of the testing wells in which instance the wells  requested
         to be left shall not be removed.

                  I. If any tests  performed by Tenant or Landlord  prior to the
         Commencement  Date  disclose  Hazardous   Materials  at  the  Premises,
         Landlord  at its  expense  will  promptly  take all  reasonable  action
         required  by law  with  respect  to the  existence  of  such  Hazardous
         Materials at the Premises.  The Commencement  Date shall not be delayed
         because of such action by Landlord unless occupation of the Premises is
         prohibited by law. 

                  J. The obligations of Landlord and Tenant under this Paragraph
         44 shall survive the  expiration or earlier  termination of the Term of
         this Lease.  The rights and  obligations  of  Landlord  and Tenant with
         respect to issues  relating  to  Hazardous  Materials  are  exclusively
         established by this Paragraph 44."

         12. SECURITY DEPOSIT: Effective as of the first day of the Third Option
Period, Lease Paragraph 50 ("Security Deposit") shall be deleted in its entirety
and replaced with the following:

                  "50. SECURITY DEPOSIT:  The following  provisions shall modify
         Lease Paragraph 4F.

                  A.  Within  thirty (30) days after the  expiration  or earlier
         termination  of the  Lease  term  and  after  Tenant  has  vacated  the
         Premises,  Landlord shall return to Tenant the entire Security  Deposit
         except for amounts that Landlord has deducted therefrom that are needed
         by Landlord to cure  defaults of Tenant  under the Lease or  compensate
         Landlord for damages for which Tenant is liable pursuant to this Lease.
         The use or disposition of the Security  Deposit shall be subject to the
         provisions of California Civil Code Section 1950.7.

                  B.  During  the  first  thirty  (30) days  following  Tenant's
         exercise of its Third Option to Extend, and only during said thirty day
         period,  Tenant  shall  have the  one-time  option  of  satisfying  its
         obligation   with  respect  to  an  amount  equal  to  one-half   (1/2)
         ($136,691.55) of the $273,383.10  Security Deposit required under Lease
         Paragraph 4F by providing to Landlord,  at Tenant's sole cost, a letter
         of credit which: (i) is drawn upon an institutional  lender  reasonably
         acceptable  and  accessible to Landlord in form and content  reasonably
         satisfactory  to Landlord;  (ii) is in the amount of one-half  (1/2) of
         the  Security  Deposit;  (iii)  is for a term of at least  twelve  (12)
         months;  (iv) with respect to any letter of credit in effect within the
         six month period immediately prior to the expiration of the Lease term,
         shall  provide  that the term of such letter of credit  shall extend at
         least forty five (45) days past the Lease  expiration  date  (including
         any  extensions  thereof);  and (v) may be drawn upon by Landlord  upon
         submission of a  declaration  of Landlord that Tenant is in default (as
         defined in  Paragraph  19 and as modified by  Paragraph  59).  Landlord
         shall  not  be   obligated   to  furnish   proof  of  default  to  such
         institutional  lender,  and Landlord shall only be required to give the
         institutional lender written notification that Tenant is in default and
         upon   receiving   such   written   notification   from   Landlord  the
         institutional  lender shall be obligated to immediately deliver cash to
         Landlord equal to the amount Landlord may spend or become  obligated to
         spend by reason of Tenant's  default or to compensate  Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's  default
         up to 1/2 of the total Security  Deposit required under Lease Paragraph
         4F. Said letter of credit shall provide that if the letter of credit is
         not renewed,  replaced or extended within twenty (20) days prior to its
         expiration  date the issuer of the credit shall  automatically  issue a
         cashiers  check  payable  to  Landlord  in the  amount of the letter of
         credit  after the date which is twenty (20) days before the  expiration
         date, and no later than the  expiration  date,  without  Landlord being
         required to make demand upon the letter of credit.  If Tenant  provides
         Landlord  with a letter  of  credit,  within  thirty  (30)  days of the
         execution of this Lease, meeting the foregoing  requirements,  one-half
         (1/2) of the

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 8

<PAGE>
                                                                       Quantum 4

         cash Security  Deposit (i.e.:  $136.691.55 of the $273.383.10  Security
         Deposit)  shall be returned to Tenant by Landlord  inasmuch as the cash
         deposit  remaining  and the Letter of Credit  equal the total  Security
         Deposit required in Lease Paragraph 4F. If Tenant defaults with respect
         to  any  provisions  of  this  Lease,  including  but  not  limited  to
         provisions relating to the payment of Rent, Landlord may (but shall not
         be  required  to) draw down on the letter of credit for  payment of any
         sum which Landlord may spend or become  obligated to spend by reason of
         Tenant's  default,  or to  compensate  Landlord  for any loss or damage
         which Landlord may suffer by reason of Tenant's  default.  Landlord and
         Tenant  acknowledge that such letter of credit will be treated as if it
         were a cash  security  deposit,  and such letter of credit may be drawn
         down upon by Landlord upon demand and  presentation  of evidence of the
         identity of Landlord to the issuer,  in the event that Tenant  defaults
         with  respect to any  provision  of this Lease and such  default is not
         cured within any applicable  cure period.  Notwithstanding  anything to
         the contrary in this Lease,  Landlord shall not be obligated to furnish
         proof of default to such  institutional  lender  and  Landlord  is only
         required to give the  institutional  lender written  notification  that
         Tenant is in default and upon receiving such written  notification from
         Landlord the  institutional  lender  shall be obligated to  immediately
         deliver  cash to  Landlord  equal to the amount  Landlord  may spend or
         become  obligated  to  spend  by  reason  of  Tenant's  default,  or to
         compensate Landlord for any loss or damage which Landlord may suffer by
         reason of  Tenant's  default up to 1/2 of the total  Security  Deposit.
         Landlord  acknowledges that it is not entitled to draw down such letter
         of credit  unless  Landlord  would have been  entitled to draw upon the
         cash  security  deposit  pursuant to the terms of  Paragraph  4F of the
         Lease.  Concurrently  with the delivery of the required  information to
         the issuer,  Landlord shall deliver to Tenant  written  evidence of the
         default upon which the draw down was based, together with evidence that
         Landlord  has  provided  to Tenant the written  notice of such  default
         which was required  under the  applicable  provision of the Lease,  and
         evidence  of the  failure  of Tenant to cure such  default  within  the
         applicable  grace period  following  receipt of such notice of default.
         Any proceeds  received by Landlord by drawing upon the letter of credit
         shall be  applied  in  accordance  with the  provisions  governing  the
         Security  Deposit  imposed by Lease Paragraph 4F and this Paragraph 50.
         If Landlord  draws upon the letter of credit,  thereafter  Tenant shall
         once  again  have  the  right to post a letter  of  credit  in place of
         one-half (1/2) of a cash Security Deposit so long as Tenant is not then
         in default.  In any event Tenant will be  obligated  to  replenish  the
         amount drawn to restore the Security  Deposit to its original amount as
         provided for in Paragraph 4F. If any portion of the letter of credit is
         used or applied  pursuant  hereto,  Tenant shall,  within ten (10) days
         after receipt of a written demand  therefor from Landlord,  restore and
         replace the value of such security by either (i)  depositing  cash with
         Landlord in the amount  equal to the sum drawn down under the letter of
         credit,   or  (ii)  increasing  the  letter  of  credit  to  its  value
         immediately prior to such application.  Tenant's failure to replace the
         value of the security as provided in the preceding  sentence shall be a
         material breach of its obligation under this Lease."

        13. REAL ESTATE TAXES: Effective as of the first day of the Third Option
Period,  Lease  Paragraph  53 ("Real  Estate  Taxes")  shall be  deleted  in its
entirety and replaced with the following:

                  "53.  REAL  PROPERTY  TAXES:  Paragraph  9 is  modified by the
         following:

                  A. The term "Real Property  Taxes" shall not include  charges,
         levies  or fees  directly  related  to the use,  storage,  disposal  or
         release of Hazardous  Materials on the Premises unless directly related
         to Tenant's  Activities  at this site or on other sites  leased  and/or
         owned by Tenant;  however,  Tenant shall be responsible  for general or
         special tax and/or assessments  (related to Hazardous  Materials and/or
         toxic waste)  imposed on the Property  provided said special tax and/or
         assessment is not imposed due to on-site  originated  contamination  on
         the  Property  (by third  parties not  related to Tenant)  prior to the
         Lease  Commencement  Date.  Subject to the terms and conditions  stated
         herein,  Tenant  shall be  responsible  for paying one hundred  percent
         (100%) of said taxes and/or assessments allocated to the Property.

                  B. If any  assessments  for  public  improvements  are  levied
         against the Premises,  Landlord may elect either to pay the  assessment
         in full or to allow the assessment to go

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 9

<PAGE>

                                                                       Quantum 4

         to bond. If Landlord pays the  assessment in full,  Tenant shall pay to
         Landlord or any assignee or purchaser of the Premises each time payment
         of Real  Property  Taxes is made a sum equal to that  which  would have
         been payable (as both principal and interest) had Landlord  allowed the
         assessment to go to bond.

                  C.  Tenant at its cost shall have the right,  at any time,  to
         seek a  reduction  in the  assessed  valuation  of the  Premises  or to
         contest  any Real  Property  Taxes  that are to be paid by  Tenant.  If
         Tenant  seeks a reduction or contests  such Real  Property  Taxes,  the
         failure  on  Tenant's  part to pay such Real  Property  Taxes  being so
         contested  shall not  constitute  a default so long as Tenant  complies
         with the provisions of this  Paragraph.  Landlord shall not be required
         to join in any  proceeding  or  contest  brought  by Tenant  unless the
         provisions of any law require that the proceeding or contest be brought
         by or in the name of Landlord.  In that case Landlord shall join in the
         proceedings or contest or permit it to be brought in Landlord's name as
         long as Landlord is not  required  to bear any cost.  Tenant,  on final
         determination  of the proceeding or contest,  shall  immediately pay or
         discharge  its  share  of any Real  Property  Taxes  determined  by any
         decision  or  judgment  rendered,  together  with all  costs,  charges,
         interest,  and  penalties  incidental  to the decision or judgment.  If
         Tenant does not pay the Real  Property  Taxes when due  pursuant to the
         Lease and Tenant seeks a reduction or contests them as provided in this
         paragraph,  before the commencement of the proceeding or contest Tenant
         shall furnish to Landlord a surety bond in form reasonably satisfactory
         to Landlord issued by an insurance  company qualified to do business in
         California.  The  amount  of  the bond  shall  equal  125% of the total
         amount of Real  Property  Taxes in  dispute  and any such bond shall be
         assignable to any lender or purchaser of the  Premises.  The bond shall
         hold Landlord and the Premises  harmless from any damage arising out of
         the  proceeding or contest and shall insure the payment of any judgment
         that may be rendered."

         14.  PROPERTY  INSURANCE:  Effective  as of the  first day of the Third
Option Period,  section B of Lease Paragraph 54 ("Property  Insurance") shall be
deleted in its entirety and be of no further force or effect.

         15.  ASSIGNMENT  AND  SUBLETTING:  Effective as of the first day of the
Third Option Period,  Lease Paragraph 55 ("Assignment and Subletting")  shall be
deleted in its entirety and replaced with the following:

                  "55.  ASSIGNMENT AND SUBLETTING:  The following  modifications
         are made to Paragraph 16:

                  A. In the event that Tenant  seeks to make any  assignment  or
         sublease,  then  Landlord,  by  giving  Tenant  written  notice  of its
         election  within fifteen (15) days after  Tenant's  notice of intent to
         assign or sublease has been given to Landlord,  shall have the right to
         elect (i) to withhold its consent to such  assignment  or sublease,  as
         permitted  pursuant  to  Paragraph  16, or (ii) to permit  Tenant to so
         assign the Lease or sublease such part of the Premises,  in which event
         Tenant may do so, but without  being  released of its liability for the
         performance  of  all  of its  obligations  under  the  Lease,  and  the
         following  shall  apply  (except  the  following  shall  not apply to a
         "Permitted Transfer" described in Paragraph 56):

                           (1) If Tenant  assigns  its  interest  in this Lease,
         then in addition to the rental provided for in this Lease, Tenant shall
         pay to Landlord fifty percent (50%) of all Rent and other consideration
         received  by  Tenant  over and above (i) the  assignee's  agreement  to
         assume  the  obligations  of  Tenant  under  this  Lease  and  (ii) all
         "Permitted   Transfer  Costs"  (as  defined  herein)  related  to  such
         assignment.  As used herein, the term "Permitted  Transfer Costs" shall
         mean all  reasonable  leasing  commissions  paid to third  parties  not
         affiliated with Tenant in order to obtain the assignment or sublease in
         question.

                           (2) If Tenant  sublets  all or part of the  Premises,
         then Tenant shall pay to Landlord in addition to the Rent  provided for
         in this Lease fifty percent (50%) of the

                                                                        JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 10

<PAGE>
                                                                       Quantum 4

         positive   difference,   if  any,   between  (i)  all  rent  and  other
         consideration  paid or provided to Tenant by the  subtenant,  less (ii)
         all Rent paid by Tenant to  Landlord  pursuant  to this Lease  which is
         allocable  to the  area so  sublet  and all  Permitted  Transfer  Costs
         related to such  sublease.  After Tenant has  recovered  all  Permitted
         Transfer Costs Tenant shall pay to Landlord the amount specified in the
         preceding sentence on the same basis,  whether periodic or in lump sum,
         that  such  rent  and  other  consideration  is paid to  Tenant  by its
         subtenant, within seven (7) days after it is received by Tenant.

                  3) Tenant's  obligations under this subparagraph shall survive
         any  assignment  or  sublease.  At the time Tenant makes any payment to
         Landlord  required  by  this  subparagraph,  Tenant  shall  deliver  an
         itemized  statement of the method by which the amount to which Landlord
         is entitled  was  calculated,  certified by Tenant as true and correct.
         Landlord  shall have the right to inspect  Tenant's  books and  records
         relating  to the  payments  due  pursuant  to this  subparagraph.  Upon
         request therefor, Tenant shall deliver to Landlord copies of all bills,
         invoices or other documents upon which its calculations are based.

                  (4) As used herein,  the term  "consideration"  shall mean any
         consideration of any kind received,  or to be received (including,  but
         not limited to, services rendered and/or value received) by Tenant as a
         result of the assignment or sublease, if such sums are paid or provided
         to Tenant for Tenant's interest in this Lease or in the Premises.

                  (5)  This  Paragraph  55.A  does  not  apply  to a  "Permitted
         Transfer",  as provided in Paragraph 56 hereof.  The parties agree that
         if  any of the  following  transactions  occur  and do not  qualify  as
         "Permitted  Transfers",  Tenant must obtain Landlord's  consent to such
         transaction   and  if  Landlord   consents  to  any  of  the  following
         transactions  which do not otherwise qualify as "Permitted  Transfers",
         then the  provisions  of this  Paragraph  55.A  shall  not apply to the
         following   transactions:   (i)  a  merger,   consolidation   or  other
         reorganization in which Tenant is not the surviving corporation so long
         as 95%  of  all  assets  and  liabilities  of  Tenant  are  permanently
         transferred to such assignee; and (ii) an assignment of this Lease to a
         corporation  which purchases or otherwise  acquires  95% or more of the
         assets of  Tenant  so long as  95% of all  assets  and  liabilities  of
         Tenant are permanently  transferred to such assignee and Tenant remains
         liable and responsible  under the Lease to the extent Tenant  continues
         in existence following such transaction."

         16. PERMITTED ASSIGNMENTS AND SUBLEASES:  Effective as of the first day
of the Third Option  Period,  Lease  Paragraph 56  ("Permitted  Assignments  and
Subleases") shall be deleted in its entirety and replaced with the following:

                  "56.  PERMITTED  ASSIGNMENTS  AND  SUBLEASES:  Notwithstanding
         anything  contained  in  Paragraph  16,  so  long as  Tenant  otherwise
         complies with the provisions of Paragraph 16 and the Permitted Transfer
         does not release  Tenant  from its  obligations  hereunder,  Tenant may
         enter into any of the  following  transfers  (a  "Permitted  Transfer")
         without  Landlord's  prior  written  consent,  and  the  provisions  of
         Paragraph 55A shall not apply to any such Permitted Transfer:

                  A. Tenant may  sublease  all or part of the Premises or assign
         its  interest  in this  Lease to any  corporation  which  controls,  is
         controlled  by, or is under  common  control with Tenant by means of an
         ownership  interest of more than fifty percent  (50%) providing  Tenant
         remains  liable  for the  payment of Rent and full  performance  of the
         Lease;

                  B.  Tenant  may  assign  its   interest  in  the  Lease  to  a
         corporation  which  results  from  a  merger,  consolidation  or  other
         reorganization in which Tenant is not the surviving corporation so long
         as (i)  95% of all assets  and  liabilities  of Tenant are  permanently
         transferred to such assignee, and (ii) immediately prior to the merger,
         consolidation  or other  reorganization,  the  corporation  into  which
         Tenant is to be merged has a net worth equal to or greater than the net
         worth of Tenant at the time of Lease  execution  or at the time of such
         assignment, merger, consolidation or

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                     Page 11

<PAGE>

                                                                       Quantum 4

         reorganization  (whichever is greater),  or if it does not, Landlord is
         provided a guaranty of the Lease (in a form  reasonably  acceptable  to
         Landlord) from a corporation (a) that is the parent of, or is otherwise
         affiliated with, the corporation into which Tenant is to be merged, and
         (b) which has a current  net  worth  equal to or  greater  than the net
         worth of Tenant at the time of Lease  execution  or at the time of such
         assignment,  merger,  consolidation  or  reorganization  (whichever  is
         greater).  In the event  there is not a  permanent  transfer of  95% or
         more of the assets and  liabilities  from Tenant to a third party,  and
         Tenant continues to exist as a separate entity, both companies shall be
         jointly and severally  liable for the full terms and  conditions of the
         Lease;

                  C.  Tenant  may  assign  this  Lease  to a  corporation  which
         purchases or otherwise  acquires 95% or more of the assets of Tenant so
         long as 95% of all assets  and  liabilities  of Tenant are  permanently
         transferred  to such  assignee  (in the event  there is not a permanent
         transfer of 95% or more of the assets and liabilities  from Tenant to a
         third party and Tenant  continues to exist as a separate  entity,  both
         companies shall be jointly and severally  liable for the full terms and
         conditions of the Lease),  and provided that immediately  prior to such
         assignment said  corporation,  has a net worth equal to or greater than
         the net worth of Tenant  (a) at the time of Lease  execution  or (b) at
         the time of such assignment  (whichever is greater), or if it does not,
         Landlord  is  provided  a guaranty  of the Lease (in a form  reasonably
         acceptable to Landlord)  from a corporation  (a) that is the parent of,
         or is otherwise  affiliated  with, said corporation and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the  time  of  Lease  execution  or at the  time  of  such  assignment,
         (whichever is greater)."

         17.  DESTRUCTION:  Effective  as of the first  day of the Third  Option
Period, Lease Paragraph 61 ("Destruction")  shall be deleted in its entirety and
replaced with the following:

                  "61. DESTRUCTION: Paragraph 21 is modified by the following:

                  A.  Notwithstanding  anything to the contrary within Paragraph
         21,  Landlord  may  terminate  this Lease in the event of an  uninsured
         event or if insurance proceeds, net of the deductible, are insufficient
         to  cover  one  hundred  percent  of the  rebuilding  costs;  provided,
         however,  Tenant shall have the right to elect, in its  discretion,  to
         contribute such excess funds to permit Landlord to repair the Premises.

                  B. Except as  provided  in  Paragraph  61C,  Landlord  may not
         terminate  the Lease if the Premises are damaged by a peril whereby the
         cost to replace and/or repair is one hundred  percent (100%) covered by
         the insurance carried by Landlord pursuant to Paragraph 12, but instead
         shall restore the Premises in the manner described by Paragraph 21.

                  C. If the  Premises  are  damaged  by a peril  covered  by the
         insurance  carried by Landlord pursuant to Paragraph 12, Landlord shall
         have  the  option  to  terminate  the  Lease  if each of the  following
         conditions is satisfied:  (i) the cost to repair or the damage  exceeds
         thirty-three  percent  (33%)  of  the  then  replacement  cost  of  the
         Premises;  and (ii) the damage occurs at a time when there is less than
         five (5) years remaining in the term of the Lease.

                  D. If Landlord fails to obtain insurance as required  pursuant
         to Paragraph 12, and said insurance  would have been available to cover
         any damage or destruction  to the Premises,  Landlord shall be required
         to rebuild,  at its cost, net of the  deductible  which would have been
         required  under  said  insurance  policy  (which  deductible  Tenant is
         required to pay).

                  E. If the Premises  are damaged by any peril,  then as soon as
         reasonably practicable,  Landlord shall furnish Tenant with the written
         opinion of Landlord's  architect or construction  consultant as to when
         the  restoration  work  required of Landlord may be  completed.  Tenant
         shall have the option to  terminate  this Lease in the event any of the
         following  occurs,  which option may be  exercised  only by delivery to
         Landlord of a written notice of election to terminate  within seven (7)
         days after 

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                    Page 12

<PAGE>

                                                                       Quantum 4

         Tenant  receives  from  Landlord  the  estimate  of the time  needed to
         complete such restoration:

                  (1) The  Premises  are  damaged by any peril (not caused by or
         resulting  from an  action of Tenant  or  Tenant's  agents,  employees,
         contractors or invitees)  and, in the reasonable  opinion of Landlord's
         architect or  construction  consultant,  the  restoration of the Leased
         Premises cannot be  substantially  completed  within 180 days after the
         date of such damage (subject to force majeure conditions); or

                  (2) The  Premises  are  damaged by any peril (not caused by or
         resulting  from an  action of Tenant  or  Tenant's  agents,  employees,
         contractors  or invitees)  within twelve (12) months of the last day of
         the Lease term, and, in the reasonable opinion of Landlord's  architect
         or  construction  consultant,  the  restoration of the Leased  Premises
         cannot be substantially completed within sixty (60) days after the date
         of such damage and Tenant has not  exercised  its Option to Extend said
         Term (or Extended Term as the case may be)."

         18.  LIABILITY  INSURANCE:  Effective  as of the first day of the Third
Option Period, the first sentence of Lease Paragraph 10 ("Liability  Insurance")
shall be deleted and replaced with the following:  "Tenant, at Tenant's expense,
agrees to keep in force  during  the Term of this  Lease a policy of  commercial
general liability insurance with combined single limit coverage of not less than
Two Million Dollars  ($2,000,000)  per occurrence for bodily injury and property
damage occurring in, on or about the Premises,  including parking and landscaped
areas."

         19. LIMITATION OF LIABILITY: Effective as of the first day of the Third
Option Period,  Lease Paragraph 36 ("Limitation of Liability")  shall be deleted
in its entirety and replaced with the following:

                  "36.  LIMITATION OF LIABILITY In consideration of the benefits
         accruing hereunder,  Tenant and all successors and assigns covenant and
         agree that,  in the event of any actual or alleged  failure,  breach or
         default hereunder by Landlord:

         (i) the sole and exclusive remedy shall be against Landlord's  interest
         in the Premises leased herein;
         (ii) no  partner of  Landlord  shall be sued or named as a party in any
         suit or action  (except as may be necessary to secure  jurisdiction  of
         the partnership);
         (iii) no  service  of  process  shall be made  against  any  partner of
         Landlord  (except as may be  necessary  to secure  jurisdiction  of the
         partnership);
         (iv) no partner of Landlord  shall be  required to answer or  otherwise
         plead to any service of process;
         (v) no judgment will be taken against any partner of Landlord;
         (vi) any judgment  taken against any partner of Landlord may be vacated
         and set aside at any time without hearing;
         (vii) no writ of  execution  will ever be levied  against the assets of
         any partner of Landlord;
         (viii) these covenants and agreements are enforceable  both by Landlord
         and also by any partner of Landlord.

                  Tenant  agrees  that  each  of  the  foregoing  covenants  and
         agreements  shall be  applicable  to any covenant or  agreement  either
         expressly  contained  in this  Lease or imposed by statute or at common
         law."

        EXCEPT AS MODIFIED HEREIN, all other terms, covenants, and conditions of
said September 17, 1990 Lease Agreement shall remain in full force and effect.

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                    Page 13

<PAGE>
                                                                       Quantum 4

        IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No.
1 to Lease as of the day and year last written below.

LANDLORD:                                   TENANT:

JOHN ARRILLAGA SURVIVOR'S TRUST             QUANTUM CORPORATION              
                                            a Delaware corporation           
                                                                             
                                                                             
By /s/ John Arrillaga,                      By  /s/ Andrew Kryder            
   ---------------------                      ---------------------
John Arrillaga, Trustee                                                      
                                            Andrew Kryder                    
                                            ------------------------
Date:  6/30/97                              Print or Type Name               
     ----------
                                                                             
RICHARD T. PEERY SEPARATE                   Title: VP FINANCE AND CORP GENERAL
PROPERTY TRUST                                     COUNSEL

                                            

By /s/ Richard T. Peery                     Date: 6/25/97
  --------------------------                     ------------
Richard T. Peery, Trustee

Date: 6/26/97
      ---------

                                                                         JA
                                                              Initial:  ALK
                                                                      ----------
                                    Page 14

<PAGE>
                                                                       Quantum 3
                                AMENDMENT NO. 1
                                    TO LEASE

         THIS  AMENDMENT  NO. 1 is made and entered into this 16th day of April,
1997, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated
7/20/77  (JOHN  ARRILLAGA  SURVIVOR'S  TRUST)  (previously  known  as the  "John
Arrillaga Separate Property Trust") as amended,  and RICHARD T. PEERY,  Trustee,
or his Successor  Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE  PROPERTY
TRUST) as amended, collectively as LANDLORD, and QUANTUM CORPORATION, a Delaware
corporation, as TENANT.

                                    RECITALS

         A. WHEREAS,  by Lease Agreement dated April 10, 1992 Landlord leased to
Tenant all of that certain  60,128+/-  square foot building located at 900 Sumac
Drive,  Milpitas,  California,  the details of which are more  particularly  set
forth in said April 10, 1992 Lease Agreement, and

         B.  WHEREAS,  said Lease was amended by the  Commencement  Letter dated
April 2, 1993 which established the February 26, 1993 Lease  Commencement  Date,
and established the Termination Date of September 30, 2006, and,

         C.  WHEREAS,  it is now the desire of the  parties  hereto to amend the
Lease by (i) extending the Term for five years,  changing the  Termination  Date
from  September  30, 2006 to September  30, 2011,  (ii)  amending the Basic Rent
schedule and Aggregate Rent  accordingly,  (iii) adding a third Five Year Option
to Extend,  (iv) replacing  Paragraphs 41C ("Lease Terms  Co-extensive")  and 48
("Cross  Default") and 53  ("Structural  Capital Costs Regulated by Governmental
Agencies After the  Commencement  of this Lease not Caused by Tenant or Tenant's
Uses or Remodeling of the Premises"), (v) amending Lease Paragraph 12 ("Property
Insurance") and (vi) amending and/or replacing  certain  provisions of the Lease
commencing as of the  commencement  of the Third  Extended Term of said Lease as
hereinafter set forth.

                                   AGREEMENT

         NOW THEREFORE,  for valuable consideration,  receipt of which is hereby
acknowledged,  and in  consideration  of the hereinafter  mutual  promises,  the
parties hereto do agree as follows:

         1. TERM OF LEASE:  It is agreed  between  the  parties  that Tenant has
exercised  its First  Five-Year  Option to Extend the lease term of that certain
lease agreement  dated March 23, 1994 for premises  located at 1101 Sumac Drive,
Milpitas,  California  (the "Building 5 Lease"),  as detailed in Paragraph 41 of
said Building 5 Lease.  Paragraph 40C of said Building 5 Lease  provides that in
the  event  the  term of  said  Building  5 Lease  is  extended  for any  reason
whatsoever,  the terms of the  Existing  Leases  (i.e.  two of said leases dated
October  31,  1989 are for  Premises  located at 1140  Technology  Drive and 500
McCarthy Blvd.,  Milpitas,  California  (the "1989 Leases");  one of said leases
dated September 17, 1990 is for Premises located at 1000 Sumac Drive,  Milpitas,
California,  and one of said leases dated April 10, 1992 is for Premises located
at 900 Sumac  Drive,  Milpitas,  California)  shall also be extended so that all
five Leases expire on the same date; therefore, it is agreed between the parties
that by  exercising  its  Option to Extend the  Building 5 Lease,  Tenant has in
effect exercised its Option to Extend under Lease Paragraph 42 ("First Five-Year
Option to Extend"),  and that  pursuant to said Lease  Paragraph 42, the Term of
this Lease  Agreement  shall be extended for an additional five (5) year period,
and the Lease  Termination  Date shall be changed  from  September  30,  2006 to
September 30, 2011.

         2. BASIC RENTAL FOR FIRST  EXTENDED  TERM OF LEASE:  The monthly  Basic
Rental for the First  Extended Term of Lease shall be as follows:  

         On October 1, 2006, the sum of ONE HUNDRED ELEVEN THOUSAND EIGHT


                                     Page 1


                                                                           JA
                                                                Initial:   ALK
                                                                         -------
<PAGE>
                                                                       Quantum 3

HUNDRED THIRTY EIGHT AND 08/100 DOLLARS  ($111,838.08)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September l, 2007.

         On October l, 2007,  the sum of ONE  HUNDRED  FOURTEEN  THOUSAND  EIGHT
HUNDRED FORTY FOUR AND 48/100 DOLLARS ($114,844.48) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2008.

         On October l, 2008,  the sum of ONE HUNDRED  SEVENTEEN  THOUSAND  EIGHT
HUNDRED FIFTY AND 88/100 DOLLARS  ($117,850.88) shall be due, and a like sum due
on the first day of each month  thereafter  through and  including  September l,
2009.

         On  October l,  2009,  the sum of ONE  HUNDRED  TWENTY  THOUSAND  EIGHT
HUNDRED FIFTY SEVEN AND 28/100  DOLLARS  ($120,857.28)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September 1, 2010.

         On October l, 2010,  the sum of ONE HUNDRED TWENTY THREE THOUSAND EIGHT
HUNDRED SIXTY THREE AND 68/100  DOLLARS  ($123,863.68)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September l, 2011.

         The  Aggregate   Basic  Rent  for  the  Lease  shall  be  increased  by
$7,071,052.80 or from $14,463,454.34 to $21,534,507.14.

         3. THIRD FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the
Lease for an  additional  five (5) year period  pursuant to Lease  Paragraph  43
("Second Five Year Option To Extend"),  Landlord hereby grants to Tenant a third
option to extend the Term of this Lease for an  additional  five (5) year period
upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration of the Lease Term as extended pursuant to Lease Paragraph 43 ("Second
Five Year  Option To  Extend"),  in which  event the Lease  shall be  considered
extended  for an  additional  five (5) year  period  upon  the  same  terms  and
conditions as this Lease,  absent this  Paragraph 3 and subject to the Rental as
set forth  below.  In the event that Tenant  fails to timely  exercise  Tenant's
option as set forth herein in writing,  Tenant  shall have no further  option to
extend this Lease or the Other  Leases,  and this Lease  shall  continue in full
force and effect for the full remaining term hereof, absent this Paragraph 3.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

               Period                               Monthly Basic Rent
               ------                               ------------------
                                                       
               Months 1-12                              $2.36/sf
               Months 13-24                             $2.41/sf
               Months 25-36                             $2.46/sf
               Months 37-48                             $2.51/sf
               Months 49-60                             $2.56/sf

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this  Paragraph 3 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 3 notwithstanding such non-curable default.

         4.  LEASE  TERMS  CO-EXTENSIVE:   Lease  Paragraph  40C  ("Lease  Terms
Co-extensive")  is  hereby  deleted  in  its  entirety  and  replaced  with  the
following:

                                                                           JA
                                                                Initial:   ALK
                                                                         -------
                                     Page 2
<PAGE>
                                                                       Quantum 3

                  "40C. LEASE TERMS  CO-EXTENSIVE:  It is acknowledged  that (i)
         Landlord and Tenant have  previously  executed four separate  leases in
         addition to this Lease:  one of said leases  dated  October 31, 1989 is
         for Premises  located at 1140 Technology  Drive,  Milpitas,  California
         (the  "Building One Lease");  one of said leases dated October 31, 1989
         is for Premises  located at 500 McCarthy  Blvd.,  Milpitas,  California
         (the "Building Two Lease"); one of said leases dated September 17, 1990
         is for Premises located at 1000 Sumac Drive, Milpitas,  California (the
         "Building Four Lease");  and one of said leases dated March 23, 1994 is
         for premises  located at 1101 Sumac Drive,  Milpitas,  California  (the
         "Building 5 Lease") (hereinafter collectively referred to as the "Other
         Leases");  and (ii) it is the intention of the parties that the term of
         this Lease be co-extensive with the term of the Other Leases, such that
         the terms of all five leases  ("the  Leases")  expire on the same date.
         The provisions of this Paragraph 40C also requires the terms of all the
         Leases to be extended  accordingly  if Tenant  exercises  its Option to
         Extend  under any of the  Leases.  The  monthly  Basic Rent  during the
         extended  term under each of the Leases  shall be increased by $.05 per
         square  foot  on  the  commencement  date  of  the  extended  term  and
         thereafter  on each and every  anniversary  of the  respective  lease's
         commencement date of the extended term."

         5.  CROSS  DEFAULT:  Lease  Paragraph  48 ("Cross  Default")  is hereby
deleted in its entirety and replaced with the following:

                  "48. CROSS DEFAULT:  It is agreed between  Landlord and Tenant
         that a default  under this Lease,  or a default  under any of the Other
         Leases may, at the option of Landlord,  be  considered a default  under
         all Leases,  in which event Landlord shall be entitled (but in no event
         required) to apply all rights and remedies of Landlord  under the terms
         of one lease to all the Leases including, but not limited to, the right
         to  terminate  any or all of the  aforementioned  Other  Leases or this
         Lease by reason of a default under the Leases or hereunder.

                  Notwithstanding  the above,  Landlord shall have the option of
         considering  a default  under this Lease or a default  under any of the
         Other Leases to be a default  under all such leases,  only with respect
         to such leases under which  Landlord is also the 'Landlord' at the time
         such  default  occurs.  By way of example,  if at the time a default of
         Tenant  occurs  under  this  Lease,  Landlord  has  sold  the  premises
         described  in any of the Other  Leases and is no longer the  'Landlord'
         thereunder,  then a default  under this Lease  shall not  constitute  a
         default under any of such Other Leases so sold by Landlord  (unless the
         premises  leased  under this Lease and the Other Leases are sold to the
         same entity), and a default by Tenant under any of such Other Leases so
         sold by Landlord shall not constitute a default under this Lease or any
         other of the Other Leases then remaining  between  Landlord and Tenant.
         However,  if the Landlord  under this Lease and the Other Leases is one
         in the same at the time of said default,  said cross default provisions
         shall apply."

        6. STRUCTURAL CAPITAL COSTS REGULATED BY GOVERNMENTAL AGENCIES AFTER THE
COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR TENANT'S  USES OR REMODELING
OF THE PREMISES:  Lease  Paragraph 53  ("Structural  Capital Costs  Regulated by
Governmental  Agencies after the Commencement of this Lease Not Caused by Tenant
or Tenant's Uses or Remodeling of the  Premises") is hereby deleted and replaced
with the following:

                  "53.   STRUCTURAL  CAPITAL  COSTS  REGULATED  BY  GOVERNMENTAL
         AGENCIES AFTER THE  COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR
         TENANT'S USES OR REMODELING  OF THE  PREMISES:  The  provisions of this
         Paragraph 53 shall modify Paragraphs 7 and 14:

                  A. If (i) during the last five (5) years of the First Extended
         Term of the Lease if said Lease has not been  extended as provided  for
         in Lease  Paragraph  43  ("Second  Five Year  Option To  Extend") or in
         Paragraph 3 ("Third Five Year Option to Extend".)

                                                                           JA
                                                                Initial:   ALK
                                                                         -------
                                     Page 3
<PAGE>
                                                                       Quantum 3

         or  Paragraph  4 ("Lease  Terms  Co-Extensive")  above,  or (ii) during
         either  of the five  (5)  year  extension  periods  permitted  by Lease
         Paragraph 43 or Paragraph 3, or Paragraph 4 above, it becomes necessary
         (due to any  governmental  requirement  for continued  occupancy of the
         Premises) to make structural  improvements  required by laws enacted or
         legal  requirements   imposed  by  governmental   agency(s)  after  the
         Commencement  Date, and the cost for each required work or improvements
         exceeds $100,000, then if such legal requirement is not imposed because
         of Tenant's  specific  use of the Premises  and is not  "triggered"  by
         Tenant's  Alterations or Tenant's  application for a building permit or
         any other governmental  approval  (collectively  "Tenant's Actions") in
         which instance Tenant shall be responsible for 100% of the cost of such
         improvements, Landlord shall be responsible for paying the cost of such
         improvement  and  constructing  such  improvement,  subject  to a  cash
         contribution  from Tenant of a portion of the cost  thereof as provided
         for and calculated in Paragraph 53B.

                  B. When Landlord  makes an  improvement  pursuant to Paragraph
         53A,  and as a condition to  Landlord's  obligation  to construct  such
         improvement,  Tenant shall make the following  contribution  in cash to
         Landlord for the cost thereof prior to the  commencement of the work by
         Landlord.  It is agreed that Tenant  shall pay to Landlord  100% of the
         cost of the  first  $100,000.00  worth of each  improvement.  After the
         first  $100,000.00,  all costs above $100,000.00 shall be divided by 15
         and  multiplied by the time period  remaining in the last five years of
         the Lease Term from the date work on such improvement commences.

                  For example, if the improvement is not required as a result of
         Tenant's  Actions and if the cost of such  improvement was $400,000 and
         there was one year and six months  remaining in the Lease term when the
         work  commenced,  then  Tenant  would be  responsible  for  reimbursing
         Landlord in cash $130,000.00 computed as follows:

            Total Cost of Work                               $400,O00.OO  
            Tenant Responsible for                                        
             1st $100,000                                    -100,000.00  
                                                             -----------  
            Total Amount To Be Amortized                     $300,000.00  
                                                           
                                                                          
            $300,000.00/15 = $20,000.00/yr. x 1.5 yrs =      $ 30,000.00  
            
            Tenant responsible for $100,000 + $30,000.00 =   $130,000.00  

                  C. If Landlord  has made  improvements,  for which  Tenant has
         reimbursed Landlord for the cost thereof pursuant to Paragraph 53B, and
         the  term  of this  Lease  is  subsequently  extended  pursuant  to the
         exercise by Tenant of an option to renew pursuant to Lease Paragraph 43
         or  Paragraph 3 above,  upon the exercise of any such option by Tenant,
         Tenant  shall  pay to  Landlord  an  additional  sum equal to the total
         amount  of said  improvement  less the  amount  previously  paid for by
         Tenant.  Using the example in  Paragraph  53B above,  Tenant  would owe
         Landlord  the   additional   amount  of   $270,000.00   ($400,000.00  -
         $130,000.00 = $270,000.00)."

        7. PROPERTY  INSURANCE:  Lease  Paragraph 12 ("Property  Insurance")  is
hereby amended to include the following:  "Tenant  acknowledges  that as part of
the cost of insurance  policies for the Premises,  Tenant is responsible for the
payment of  insurance  deductibles  on  insurance  claims as they  relate to the
Premises  subject to the  limitations  provided in Lease Paragraph 55 ("Property
Insurance")  which limitations are applicable only during the initial Lease Term
and the First Lease Extension Period and the Second Lease Extension Period. Said
limitation  provided  for  in  Lease  Paragraph  55 are  null  and  void  at the
commencement of the Third Lease Extended Term".

         8. THIRD OPTION PERIOD - LEASE PROVISION  CHANGES:  In the event Tenant
exercises  its Third Option to Extend as provided for in Paragraph 3 above,  the
following amendments  (contained within Paragraphs 9 through 19) are herein made
to the Lease to be effective  upon the  commencement  of the third option period
("Third Option  Period"),  or during any period  following the expiration of the
Lease  Term or  expiration  of the Lease  when  Tenant is in  possession  of the
Premises.

                                                                           JA
                                                                Initial:   ALK
                                                                         -------
                                     Page 4
<PAGE>
                                                                       Quantum 3

         9. LATE  CHARGE:  Effective  as of the  first  day of the Third  Option
Period,  the Late Charge referenced in Lease Paragraph 4.D ("Late Charge") shall
be changed from five percent (5%) to ten percent (10%),  and Lease  Paragraph 50
("Limitation on Late Charge") shall be deleted in its entirety and of no further
force or effect.

         10.  MANAGEMENT  FEE:  Notwithstanding  anything to the contrary in the
Lease,  effective  as of the first day of the Third  Option  Period,  and on the
first day of each month thereafter, Tenant shall pay to Landlord, in addition to
the Basic Rent and Additional Rent, a fixed monthly  management fee ("Management
Fee") equal to one percent  (1%) of the Basic Rent due for each month during the
Lease Term.

         11.  HAZARDOUS  MATERIALS:  Effective  as of the first day of the Third
Option Period,  Lease Paragraph 45 ("Hazardous  Materials")  shall be deleted in
its entirety and replaced with the following:

                  "45. HAZARDOUS MATERIALS: Landlord and Tenant agree as follows
         with  respect to the  existence  or use of  "Hazardous  Materials"  (as
         defined  herein) on, in, under or about the Premises and real  property
         located beneath said Premises, which includes the entire parcel of land
         on which the Premises are located as shown in Green on Exhibit A to the
         Lease (hereinafter collectively referred to as the "Property"):

                  A. As used herein,  the term "Hazardous  Materials" shall mean
         any  material,  waste,  chemical,  mixture  or  byproduct  which  is or
         hereafter is defined,  listed or designated  under  Environmental  Laws
         (defined below) as a pollutant,  or as a contaminant,  or as a toxic or
         hazardous  substance,  waste or  material,  or any  other  unwholesome,
         hazardous,   toxic,  biohazardous,   or  radioactive  material,  waste,
         chemical,  mixture  or  byproduct,  or which is  listed,  regulated  or
         restricted by any  Environmental  Law (including,  without  limitation,
         petroleum  hydrocarbons  or any distillates or derivatives or fractions
         thereof,  polychlorinated  biphenyls, or asbestos). As used herein, the
         term "Environmental  Laws" shall mean any applicable Federal,  State of
         California or local  government  law (including  common law),  statute,
         regulation,  rule,  ordinance,  permit,  license,  order,  requirement,
         agreement, or approval, or any determination,  judgment,  directive, or
         order of any  executive or judicial  authority at any level of Federal,
         State of  California  or local  government  (whether  now  existing  or
         subsequently  adopted or  promulgated)  relating  to  pollution  or the
         protection of the environment,  ecology,  natural resources,  or public
         health and safety.

                  B. Tenant shall notify Landlord prior to the occurrence of any
         Tenant's  Hazardous  Materials  Activities  (defined  below).  Landlord
         acknowledges  that Tenant  shall use,  in  compliance  with  applicable
         Environmental  Laws,  customary  household and office supplies  (Tenant
         shall first provide  Landlord with a list of said materials  use), such
         as mild cleaners,  lubricants and copier toner. Any and all of Tenant's
         Hazardous  Materials  Activities  shall be conducted in conformity with
         this Paragraph 45,  Paragraph 14 of this Lease,  and in compliance with
         all  Environmental  Laws  and  regulations.  As used  herein,  the term
         "Tenant's Hazardous  Materials  Activities" shall mean any and all use,
         handling,  generation,  storage, disposal,  treatment,  transportation,
         release,  discharge,  or emission of any  Hazardous  Materials  on, in,
         beneath,  to,  from,  at or about  the  Property,  in  connection  with
         Tenant's  use of  the  Property,  or by  Tenant  or by any of  Tenant's
         agents,  employees,  contractors,  vendors,  invitees,  visitors or its
         future  subtenants  or  assignees  or other  third  parties  (including
         "dumping"  by others) (or which  Hazardous  Materials  originate on the
         surface of the Premises any time on or after the  Commencement  Date of
         this Lease, but excluding  Hazardous Materials on the Premises prior to
         the Lease Commencement Date because of the storage,  use, disposal,  or
         transportation  of  such  materials  or  waste  by  any  of  Landlord's
         contractors or otherwise  arising out of construction work performed by
         or under the  direction of Landlord on the Premises and Landlord  shall
         be responsible for all required  actions with respect to such materials
         or wastes).  Tenant  agrees to provide  Landlord  with  prompt  written
         notice of any spill or release of Hazardous Materials at

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                                                                       Quantum 3

         the  Property  during  the term of the  Lease of which  Tenant  becomes
         aware,  and further  agrees to provide  Landlord  with  prompt  written
         notice  of any  violation  of  Environmental  Laws in  connection  with
         Tenant's Hazardous Materials  Activities of which Tenant becomes aware.
         If Tenant's Hazardous Materials  Activities involve Hazardous Materials
         other  than  normal use of  customary  household  and office  supplies,
         Tenant also agrees at Tenant's  expense:  (i) to install such Hazardous
         Materials  monitoring,  storage  and  containment  devices  as  may  be
         required by Environmental Laws,  regulations and/or governing agencies;
         (ii) to provide  Landlord  with a written  inventory of such  Hazardous
         Materials,  including an update of same each year upon the  anniversary
         date of the Commencement Date of the Lease  ("Anniversary  Date");  and
         (iii) on each  Anniversary  Date to provide to  Landlord  copies of all
         documentation and records, required by applicable Environmental Laws to
         be prepared and submitted to governmental authorities,  relating to use
         at  the  Property  of  Hazardous  Materials  or to  Tenant's  Hazardous
         Materials  Activities,  if any. If upon completion of Landlord's review
         of said  documentation and records,  Landlord  reasonably  questions if
         Tenant is in compliance  with all  applicable  Environmental  Laws with
         respect to  Tenant's  Hazardous  Materials  Activities,  Tenant  agrees
         within  thirty  (30) days  following  receipt  of written  notice  from
         Landlord, to retain a qualified environmental consultant, acceptable to
         Landlord,  to  evaluate  whether  Tenant  is  in  compliance  with  all
         applicable  Environmental  Laws  with  respect  to  Tenant's  Hazardous
         Materials Activities.  Tenant, at its expense, shall submit to Landlord
         a  report  from  such  environmental  consultant  which  discusses  the
         environmental  consultant's  findings  within  two (2)  months  of each
         Anniversary Date. Tenant, at its expense,  shall promptly undertake and
         complete  any and all  steps  necessary,  and in full  compliance  with
         applicable Environmental Laws, to fully correct any and all problems or
         deficiencies identified by the environmental  consultant,  and promptly
         provide Landlord with documentation of all such corrections.

                  C. Prior to termination or expiration of the Lease, Tenant, at
         its expense,  shall (i) properly remove from the Property all Hazardous
         Materials  which come to be located at the Property in connection  with
         Tenant's Hazardous Materials Activities, and (ii) fully comply with and
         complete all facility closure requirements of applicable  Environmental
         Laws regarding Tenant's Hazardous Materials  Activities,  including but
         not limited to (x) properly restoring and repairing the Property to the
         extent damaged by such closure  activities,  and (y) obtaining from the
         local Fire Department or other appropriate  governmental authority with
         any legal or regulatory jurisdiction a written concurrence that closure
         has been completed in compliance  with applicable  Environmental  Laws.
         Tenant  shall  promptly  provide  Landlord  with  copies of any claims,
         notices,  work plans, data and reports prepared,  received or submitted
         in connection with any such closure activities.

                  D. If Landlord,  upon  consultation  with  Tenant,  reasonably
         concludes  that the  Property  has become  contaminated  as a result of
         Tenant's Hazardous  Materials  Activities,  Landlord in addition to any
         other rights it may have under this Lease or under  Environmental  Laws
         or other laws,  may enter upon the  Property  and  conduct  inspection,
         sampling  and  analysis,  including  but not limited to  obtaining  and
         analyzing  samples  of  soil  and  groundwater,   for  the  purpose  of
         determining the nature and extent of such  contamination  except to the
         extent  that  such  activities  may  be   inconsistent   with  Tenant's
         compliance with  Environmental  Laws.  Tenant shall promptly  reimburse
         Landlord  for the  costs of such an  investigation,  including  but not
         limited to reasonable  attorneys'  fees Landlord incurs with respect to
         such investigation to the extent, and only to the extent,  that it that
         discloses Hazardous Materials  contamination for which Tenant is liable
         under this Lease.  Except as may be  required  of Tenant by  applicable
         Environmental Laws, Tenant shall not perform any sampling,  testing, or
         drilling to identify  the  presence of any  Hazardous  Materials at the
         Property,  without  Landlord's prior written consent which shall not be
         unreasonably  withheld.  Tenant shall  promptly  provide  Landlord with
         copies of any claims,  notices,  work plans, data and reports prepared,
         received or  submitted  in  connection  with any  sampling,  testing or
         drilling performed pursuant to the preceding sentence.

                  E.  Tenant  shall   indemnify,   defend  (with  legal  counsel
         acceptance  to  Landlord,  whose  consent  shall  not  unreasonably  be
         withheld) and hold harmless Landlord, its

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<PAGE>
                                                                       Quantum 3

         employees,  assigns,  successors,  successors-in-interest,  agents  and
         representatives  from and against any and all claims (including but not
         limited to third  party  claims  from a private  party or a  government
         authority),   liabilities,   obligations,  losses,  causes  of  action,
         demands,  governmental  proceedings  or directives,  fines,  penalties,
         expenses,  costs  (including but not limited to reasonable  attorneys',
         consultants'  and other  experts' fees and costs),  and damages,  which
         arise from or relate to: (i) Tenant's Hazardous  Materials  Activities;
         (ii) any Hazardous  Materials  contamination  caused by Tenant prior to
         the  Commencement  Date  of the  Lease;  or  (iii)  the  breach  of any
         obligation of Tenant under this Paragraph 45  (collectively,  "Tenant's
         Environmental Indemnification"). Tenant's Environmental Indemnification
         shall  include but is not  limited to the  obligation  to promptly  and
         fully reimburse  Landlord for losses in or reductions to rental income,
         and  diminution  in  fair  market  value  of  the  Property.   Tenant's
         Environmental  Indemnification shall further include but is not limited
         to the obligation to diligently  and properly  implement to completion,
         at Tenant's expense, any and all environmental investigation,  removal,
         remediation,   monitoring,  reporting,  closure  activities,  or  other
         environmental   response  action  as  may  be  required  by  applicable
         Environmental  Laws,  regulations or governing agencies  (collectively,
         "Response Actions"). Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any Response Actions.

                  F.  Landlord  hereby makes the  following  representations  to
         Tenant, each of which is made only to the best of Landlord's  knowledge
         as of the date  Landlord  executes  this Lease,  without any inquiry or
         investigation  having been made or required by Landlord  regarding this
         subject,  nor does Landlord have any  obligation to investigate or make
         inquiry regarding the subject:

                           (1)  The  soil  and  ground  water  on or  under  the
         Premises does not contain Hazardous  Materials in amounts which violate
         any laws to the  extent  that any  governmental  entity  could  require
         either  Landlord or Tenant to take any remedial  action with respect to
         such Hazardous Materials.

                           (2)  During  the time  that  Landlord  has  owned the
         Premises,  Landlord  has  received no notice of (i) any  violation,  or
         alleged  violation,  of any law  that  has not  been  corrected  to the
         satisfaction  of the  appropriate  authority,  (ii) any pending  claims
         relating to the  presence of  Hazardous  Material on the  Premises,  or
         (iii) any pending  investigation by any governmental  agency concerning
         the Premises relating to Hazardous Materials.

                  G.  Landlord and Tenant shall each give written  notice to the
         other  as  soon as  reasonably  practicable  of (i)  any  communication
         received from any governmental authority concerning Hazardous Materials
         which  relates  to the  Premises,  and  (ii) any  contamination  of the
         Premises by Hazardous  Materials  which  constitutes a violation of any
         law.  Attached  as  Exhibit  "C" to the  Lease  is a list of  Hazardous
         Materials  that Tenant  intends to use at the  Premises.  If during the
         Lease Term Tenant  proposes  to use other  Hazardous  Materials  at the
         Premises,  Tenant shall inform  Landlord of such use,  identifying  the
         Hazardous  Materials and the manner of their use, storage and disposal,
         and  shall  agree  (i) to use,  store  and  dispose  of such  Hazardous
         Materials  strictly  in  compliance  with  all  laws,  regulations  and
         governing  agencies and (ii) that the  indemnity set forth in Paragraph
         45 shall be applicable to Tenant's use of such Hazardous Material.

                           H. Landlord or Tenant may, at any time, cause testing
         wells to be installed on the  Premises,  and may cause the ground water
         to be tested to detect the presence of Hazardous Material by the use of
         such  tests as are then  customarily  used for such  purposes.  Testing
         wells  installed  by  Tenant  shall  be paid  for by  Tenant.  If tests
         conducted by Landlord  disclose  that Tenant has violated any Hazardous
         Materials laws, or Tenant or parties on the Premises during the Term of
         this Lease have  contaminated  the Premises as determined by regulatory
         agencies  pursuant  to  Hazardous  Materials  laws,  or that Tenant has
         liability to Landlord  pursuant to Paragraph 45A, then Tenant shall pay
         for 100 percent of the cost of the test and all related expense.  Prior
         to the  expiration  of the Lease Term,  Tenant shall remove any testing
         wells it has

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                                                                       Quantum 3

         installed at the  Premises,  and return the  Premises to the  condition
         existing  prior to the  installation  of such  wells,  unless  Landlord
         requests in writing that Tenant leave all or some of the testing  wells
         in which instance the wells requested to be left shall not be removed.

                  I. If any tests  performed by Tenant or Landlord  prior to the
         Commencement  Date  disclose  Hazardous   Materials  at  the  Premises,
         Landlord  at its  expense  will  promptly  take all  reasonable  action
         required  by law  with  respect  to the  existence  of  such  Hazardous
         Materials at the Premises.  The Commencement  Date shall not be delayed
         because of such action by Landlord unless occupation of the Premises is
         prohibited by law.

                  J. The obligations of Landlord and Tenant under this Paragraph
         45 shall survive the  expiration or earlier  termination of the Term of
         this Lease.  The rights and  obligations  of  Landlord  and Tenant with
         respect to issues  relating  to  Hazardous  Materials  are  exclusively
         established by this Paragraph 45."

         12. SECURITY DEPOSIT: Effective as of the first day of the Third Option
Period, Lease Paragraph 51 ("Security Deposit") shall be deleted in its entirety
and replaced with the following:

                  "51. SECURITY DEPOSIT:  The following  provisions shall modify
         Lease Paragraph 4F:

                  A.  Within  thirty (30) days after the  expiration  or earlier
         termination  of the  Lease  term  and  after  Tenant  has  vacated  the
         Premises,  Landlord shall return to Tenant the entire Security  Deposit
         except for amounts that Landlord has deducted therefrom that are needed
         by Landlord to cure  defaults of Tenant  under the Lease or  compensate
         Landlord for damages for which Tenant is liable pursuant to this Lease.
         The use or disposition of the Security  Deposit shall be subject to the
         provisions of California Civil Code Section 1950.7.

                  B.  During  the  first  thirty  (30) days  following  Tenant's
         exercise of its Third Option to Extend, and only during said thirty day
         period,  Tenant  shall  have  the  one-time option  of  satisfying  its
         obligation   with  respect  to  an  amount  equal  to  one-half   (1/2)
         ($83,277.28) of the $166,554.56  Security  Deposit required under Lease
         Paragraph 4F by providing to Landlord,  at Tenant's sole cost, a letter
         of credit which: (i) is drawn upon an institutional  lender  reasonably
         acceptable  and  accessible to Landlord in form and content  reasonably
         satisfactory  to Landlord;  (ii) is in the amount of one-half  (1/2) of
         the  Security  Deposit;  (iii)  is for a term of at lease  twelve  (12)
         months;  (iv) with respect to any letter of credit in effect within the
         six month period immediately prior to the expiration of the Lease term,
         shall  provide  that the term of such letter of credit  shall extend at
         least forty five (45) days past the Lease  expiration  date  (including
         any  extensions  thereof);  and (v) may be drawn upon by Landlord  upon
         submission of a  declaration  of Landlord that Tenant is in default (as
         defined in  Paragraph  19 and as modified by  Paragraph  60).  Landlord
         shall  not  be   obligated   to  furnish   proof  of  default  to  such
         institutional  lender,  and Landlord shall only be required to give the
         institutional lender written notification that Tenant is in default and
         upon   receiving   such   written   notification   from   Landlord  the
         institutional  lender shall be obligated to immediately deliver cash to
         Landlord equal to the amount Landlord may spend or become  obligated to
         spend by reason of Tenant's  default or to compensate  Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's  default
         up to 1/2 of the total Security  Deposit required under Lease Paragraph
         4F. Said letter of credit shall provide that if the letter of credit is
         not renewed,  replaced or extended within twenty (20) days prior to its
         expiration  date the issuer of the credit shall  automatically  issue a
         cashiers  check  payable  to  Landlord  in the  amount of the letter of
         credit  after the date which is twenty (20) days before the  expiration
         date, and no later than the  expiration  date,  without  Landlord being
         required to make demand upon the letter of credit.  If Tenant  provides
         Landlord with a letter of credit, within thirty (30) days the execution
         of this Lease, meeting the foregoing requirements one-half (1/2) of the
         cash Security  Deposit (i.e.,  $83,277.28 of the  $166,554.56  Security
         Deposit)  shall be  returned  to Tenant by  Landlord  inasmuch  deposit
         remaining and the Letter

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                                                                       Quantum 3

         of Credit equal the total Security  Deposit required in Lease Paragraph
         4F. If Tenant  defaults  with respect to any  provisions of this Lease,
         including  but not  limited to  provisions  relating  to the payment of
         Rent,  Landlord  may (but  shall not be  required  to) draw down on the
         letter of credit  for  payment of any sum which  Landlord  may spend or
         become  obligated  to  spend  by  reason  of  Tenant's  default,  or to
         compensate Landlord for any loss or damage which Landlord may suffer by
         reason of Tenant's default.  Landlord and Tenant  acknowledge that such
         letter of credit will be treated as if it were a cash security deposit,
         and such  letter of credit  may be drawn  down  upon by  Landlord  upon
         demand and  presentation of evidence of the identity of Landlord to the
         issuer, in the event that Tenant defaults with respect to any provision
         of this Lease and such default is not cured within any applicable  cure
         period.  Notwithstanding  anything  to  the  contrary  in  this  Lease,
         Landlord  shall not be  obligated  to furnish  proof of default to such
         institutional  lender  and  Landlord  is  only  required  to  give  the
         institutional lender written notification that Tenant is in default and
         upon   receiving   such   written   notification   from   Landlord  the
         institutional  lender shall be obligated to immediately deliver cash to
         Landlord equal to the amount Landlord may spend or become  obligated to
         spend by reason of Tenant's default,  or to compensate Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's  default
         up to 1/2 of the total Security Deposit.  Landlord acknowledges that it
         is not  entitled  to draw down such  letter of credit  unless  Landlord
         would  have  been  entitled  to draw  upon  the cash  security  deposit
         pursuant to the terms of Paragraph 4F of the Lease.  Concurrently  with
         the delivery of the required information to the issuer,  Landlord shall
         deliver to Tenant  written  evidence of the default upon which the draw
         down was based,  together  with  evidence that Landlord has provided to
         Tenant the written  notice of such default which was required under the
         applicable  provision  of the Lease,  and  evidence  of the  failure of
         Tenant  to  cure  such  default  within  the  applicable  grace  period
         following  receipt of such notice of default.  Any proceeds received by
         Landlord  by  drawing  upon the  letter of credit  shall be  applied in
         accordance with the provisions  governing the Security  Deposit imposed
         by Lease Paragraph 4F and this Paragraph 51. If Landlord draws upon the
         letter of credit,  thereafter Tenant shall once again have the right to
         post a letter of credit in place of one-half  (1/2) of a cash  Security
         Deposit so long as Tenant is not then in default.  In any event  Tenant
         will be obligated to replenish the amount drawn to restore the Security
         Deposit to its original  amount as provided for in Paragraph 4F. If any
         portion  of the letter of credit is used or  applied  pursuant  hereto,
         Tenant shall,  within ten (10) days after  receipt of a written  demand
         therefor from Landlord,  restore and replace the value of such security
         by either (i) depositing  cash with Landlord in the amount equal to the
         sum drawn  down  under the letter of  credit,  or (ii)  increasing  the
         letter of credit to its value  immediately  prior to such  application.
         Tenant's  failure to replace  the value of the  security as provided in
         the preceding  sentence  shall be a material  breach of its  obligation
         under this Lease."

         13.  REAL  ESTATE  TAXES:  Effective  as of the  first day of the Third
Option Period,  Lease Paragraph 54 ("Real Estate Taxes") shall be deleted in its
entirety and replaced with the following:

                  "54.  REAL  PROPERTY  TAXES:  Paragraph  9 is  modified by the
         following:

                  A. The term "Real Property  Taxes" shall not include  charges,
         levies  or fees  directly  related  to the use,  storage,  disposal  or
         release of Hazardous  Materials on the Premises unless directly related
         to Tenant's  Activities  at this site or on other sites  leased  and/or
         owned by Tenant;  however,  Tenant shall be responsible  for general or
         special tax and/or assessments  (related to Hazardous  Materials and/or
         toxic waste)  imposed on the Property  provided said special tax and/or
         assessment is not imposed due to on-site  originated  contamination  on
         the  Property  (by third  parties not  related to Tenant)  prior to the
         Lease  Commencement  Date.  Subject to the terms and conditions  stated
         herein,  Tenant  shall be  responsible  for paying one hundred  percent
         (100%) of said taxes and/or assessments allocated to the Property.

                  B. If any  assessments  for  public  improvements  are  levied
         against the Premises,  Landlord may elect either to pay the  assessment
         in full or to allow the  assessment to go to bond. If Landlord pays the
         assessment  in full,  Tenant  shall pay to Landlord or any  assignee or
         purchaser of the Premises each time payment of Real Property Taxes is

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         made a sum  equal  to that  which  would  have  been  payable  (as both
         principal and interest)  had Landlord  allowed the  assessment to go to
         bond.

                  C.  Tenant at its cost shall have the right,  at any time,  to
         seek a  reduction  in the  assessed  valuation  of the  Premises  or to
         contest  any Real  Property  Taxes  that are to be paid by  Tenant.  If
         Tenant  seeks a reduction or contests  such Real  Property  Taxes,  the
         failure  on  Tenant's  part to pay such Real  Property  Taxes  being so
         contested  shall not  constitute  a default so long as Tenant  complies
         with the provisions of this  Paragraph.  Landlord shall not be required
         to join in any  proceeding  or  contest  brought  by Tenant  unless the
         provisions of any law require that the proceeding or contest be brought
         by or in the name of Landlord.  In that case Landlord shall join in the
         proceedings or contest or permit it to be brought in Landlord's name as
         long as Landlord is not  required  to bear any cost.  Tenant,  on final
         determination  of the proceeding or contest,  shall  immediately pay or
         discharge  its  share  of any Real  Property  Taxes  determined  by any
         decision  or  judgment  rendered,  together  with all  costs,  charges,
         interest,  and  penalties  incidental  to the decision or judgment.  If
         Tenant does not pay the Real  Property  Taxes when due  pursuant to the
         Lease and Tenant seeks a reduction or contests them as provided in this
         paragraph,  before the commencement of the proceeding or contest Tenant
         shall furnish to Landlord a surety bond in form reasonably satisfactory
         to Landlord issued by an insurance  company qualified to do business in
         California. The amount of the bond shall equal 125% of the total amount
         of Real Property Taxes in dispute and any such bond shall be assignable
         to any  lender  or  purchaser  of the  Premises.  The bond  shall  hold
         Landlord and the Premises  harmless from any damage  arising out of the
         proceeding or contest and shall insure the payment of any judgment that
         may be rendered."

         14.  PROPERTY  INSURANCE:  Effective  as of the  first day of the Third
Option Period,  section B of Lease Paragraph 55 ("Property  Insurance") shall be
deleted in its entirety and be of no further force or effect.

         15.  ASSIGNMENT  AND  SUBLETTING:  Effective as of the first day of the
Third Option Period,  Lease Paragraph 56 ("Assignment and Subletting")  shall be
deleted in its entirety and replaced with the following:

                  "56.  ASSIGNMENT AND SUBLETTING:  The following  modifications
         are made to Paragraph 16:

                  A. In the event that Tenant  seeks to make any  assignment  or
         sublease,  then  Landlord,  by  giving  Tenant  written  notice  of its
         election  within fifteen (15) days after  Tenant's  notice of intent to
         assign or sublease has been given to Landlord,  shall have the right to
         elect (i) to withhold its consent to such  assignment  or sublease,  as
         permitted  pursuant  to  Paragraph  16, or (ii) to permit  Tenant to so
         assign the Lease or sublease such part of the Premises,  in which event
         Tenant may do so, but without  being  released of its liability for the
         performance  of  all  of its  obligations  under  the  Lease,  and  the
         following  shall  apply  (except  the  following  shall  not apply to a
         "Permitted Transfer" described in Paragraph 57):

                           (1) If Tenant  assigns  its  interest  in this Lease,
         then in addition to the rental provided for in this Lease, Tenant shall
         pay to Landlord fifty percent (50%) of all Rent and other consideration
         received  by  Tenant  over and above (i) the  assignee's  agreement  to
         assume  the  obligations  of  Tenant  under  this  Lease  and  (ii) all
         "Permitted   Transfer  Costs"  (as  defined  herein)  related  to  such
         assignment.  As used herein, the term "Permitted  Transfer Costs" shall
         mean all  reasonable  leasing  commissions  paid to third  parties  not
         affiliated with Tenant in order to obtain the assignment or sublease in
         question.

                           (2) If Tenant  sublets  all or part of the  Premises,
         then Tenant shall pay to Landlord in addition to the Rent  provided for
         in this Lease fifty percent (50%) of the positive  difference,  if any,
         between (i) all rent and other consideration paid or provided to Tenant
         by the  subtenant,  less  (ii)  all Rent  paid by  Tenant  to  Landlord
         pursuant to

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                                    Page 10
<PAGE>
                                                                       Quantum 3

         this Lease which is allocable  to the area so sublet and all  Permitted
         Transfer Costs related to such sublease. After Tenant has recovered all
         Permitted  Transfer  Costs  Tenant  shall pay to  Landlord  the  amount
         specified in the preceding sentence on the same basis, whether periodic
         or in lump  sum,  that such  rent and  other  consideration  is paid to
         Tenant by its subtenant,  within seven (7) days after it is received by
         Tenant.

                           3) Tenant's obligations under this subparagraph shall
         survive  any  assignment  or  sublease.  At the time  Tenant  makes any
         payment to Landlord required by this subparagraph, Tenant shall deliver
         an  itemized  statement  of the  method  by which  the  amount to which
         Landlord is entitled  was  calculated,  certified by Tenant as true and
         correct.  Landlord  shall have the right to inspect  Tenant's books and
         records  relating to the payments  due  pursuant to this  subparagraph.
         Upon request  therefor,  Tenant shall deliver to Landlord copies of all
         bills,  invoices or other  documents  upon which its  calculations  are
         based.

                           (4) As used herein,  the term  "consideration"  shall
         mean  any  consideration  of  any  kind  received,  or to  be  received
         (including,   but  not  limited  to,  services  rendered  and/or  value
         received) by Tenant as a result of the assignment or sublease,  if such
         sums are paid or provided to Tenant for Tenant's interest in this Lease
         or in the Premises.

                           (5)  This   Paragraph   56.A  does  not  apply  to  a
         "Permitted  Transfer",  as provided in Paragraph 57 hereof. The parties
         agree  that  if any  of the  following  transactions  occur  and do not
         qualify as "Permitted Transfers", Tenant must obtain Landlord's consent
         to such  transaction  and if Landlord  consents to any of the following
         transactions  which do not otherwise qualify as "Permitted  Transfers",
         then the  provisions  of this  Paragraph  56.A  shall  not apply to the
         following   transactions:   (i)  a  merger,   consolidation   or  other
         reorganization in which Tenant is not the surviving corporation so long
         as 95%  of  all  assets  and  liabilities  of  Tenant  are  permanently
         transferred to such assignee; and (ii) an assignment of this Lease to a
         corporation  which  purchases or otherwise  acquires 95% or more of the
         assets of Tenant so long as 95% of all assets and liabilities of Tenant
         are permanently  transferred to such assignee and Tenant remains liable
         and  responsible  under the Lease to the  extent  Tenant  continues  in
         existence following such transaction."

         16. PERMITTED ASSIGNMENTS AND SUBLEASES:  Effective as of the first day
of the Third Option  Period,  Lease  Paragraph 57  ("Permitted  Assignments  and
Subleases") shall be deleted in its entirety and replaced with the following:

                  "57.  PERMITTED  ASSIGNMENTS  AND  SUBLEASES:  Notwithstanding
         anything  contained  in  Paragraph  16,  so  long as  Tenant  otherwise
         complies with the provisions of Paragraph 16 and the Permitted Transfer
         does not release  Tenant  from its  obligations  hereunder,  Tenant may
         enter into any of the  following  transfers  (a  "Permitted  Transfer")
         without  Landlord's  prior  written  consent,  and  the  provisions  of
         Paragraph 56A shall not apply to any such Permitted Transfer:

                  A. Tenant may  sublease  all or part of the Premises or assign
         its  interest  in this  Lease to any  corporation  which  controls,  is
         controlled  by, or is under  common  control with Tenant by means of an
         ownership  interest of more than fifty percent (50%)  providing  Tenant
         remains  liable  for the  payment of Rent and full  performance  of the
         Lease;

                  B.  Tenant  may  assign  its   interest  in  the  Lease  to  a
         corporation  which  results  from  a  merger,  consolidation  or  other
         reorganization in which Tenant is not the surviving corporation so long
         as (i) 95% of all assets  and  liabilities  of Tenant  are  permanently
         transferred to such assignee, and (ii) immediately prior to the merger,
         consolidation  or other  reorganization,  the  corporation  into  which
         Tenant is to be merged has a net worth equal to or greater than the net
         worth of Tenant at the time of Lease  execution  or at the time of such
         assignment,  merger,  consolidation  or  reorganization  (whichever  is
         greater),  or if it does not,  Landlord  is  provided a guaranty of the
         Lease (in a form reasonably acceptable to  Landlord) from a corporation
         (a) that

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<PAGE>
                                                                       Quantum 3

         is the parent of, or is otherwise affiliated with, the corporation into
         which  Tenant is to be  merged,  and (b) which has a current  net worth
         equal to or  greater  than the net worth of Tenant at the time of Lease
         execution or at the time of such assignment,  merger,  consolidation or
         reorganization  (whichever  is  greater).  In the event  there is not a
         permanent  transfer of 95% or more of the assets and liabilities  from
         Tenant to a third  party,  and Tenant  continues to exist as a separate
         entity,  both companies  shall be jointly and severally  liable for the
         full terms and conditions of the Lease;

                  C.  Tenant  may  assign  this  Lease  to a  corporation  which
         purchases or otherwise  acquires 95% or more of the assets of Tenant so
         long as 95% of all assets  and  liabilities  of Tenant are  permanently
         transferred  to such  assignee  (in the event  there is not a permanent
         transfer of 95% or more of the assets and liabilities  from Tenant to a
         third party and Tenant  continues to exist as a separate  entity,  both
         companies shall be jointly and severally  liable for the full terms and
         conditions of the Lease),  and provided that immediately  prior to such
         assignment said  corporation,  has a net worth equal to or greater than
         the net worth of Tenant  (a) at the time of Lease  execution  or (b) at
         the time of such assignment  (whichever is greater), or if it does not,
         Landlord  is  provided  a guaranty  of the Lease (in a form  reasonably
         acceptable to Landlord)  from a corporation  (a) that is the parent of,
         or is otherwise  affiliated  with, said corporation and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the  time  of  Lease  execution  or at the  time  of  such  assignment,
         (whichever is greater)."

         17.  DESTRUCTION:  Effective  as of  the first day of the Third  Option
Period, Lease Paragraph 62 ("Destruction")  shall be deleted in its entirety and
replaced with the following:

                  "62. DESTRUCTION: Paragraph 21 is modified by the following:

                  A.  Notwithstanding  anything to the contrary within Paragraph
         21,  Landlord  may  terminate  this Lease in the event of an  uninsured
         event or if insurance proceeds, net of the deductible, are insufficient
         to  cover  one  hundred  percent  of the  rebuilding  costs;  provided,
         however,  Tenant shall have the right to elect, in its  discretion,  to
         contribute such excess funds to permit Landlord to repair the Premises.

                  B. Except as  provided  in  Paragraph  62C,  Landlord  may not
         terminate  the Lease if the Premises are damaged by a peril whereby the
         cost to replace and/or repair is one hundred  percent (100%) covered by
         the insurance carried by Landlord pursuant to Paragraph 12, but instead
         shall restore the Premises in the manner described by Paragraph 21.

                  C. If the  Premises  are  damaged  by a peril  covered  by the
         insurance  carried by Landlord pursuant to Paragraph 12, Landlord shall
         have  the  option  to  terminate  the  Lease  if each of the  following
         conditions is satisfied:  (i) the cost to repair or the damage  exceeds
         thirty-three  percent  (33%) of  the  then  replacement  cost  of the
         Premises;  and (ii) the damage occurs at a time when there is less than
         five (5) years remaining in the term of the Lease.

                  D. If Landlord fails to obtain insurance as required  pursuant
         to Paragraph 12, and said insurance  would have been available to cover
         any damage or destruction  to the Premises,  Landlord shall be required
         to rebuild,  at its cost, net of the  deductible  which would have been
         required  under  said  insurance  policy  (which  deductible  Tenant is
         required to pay).

                  E. If the Premises  are damaged by any peril,  then as soon as
         reasonably practicable,  Landlord shall furnish Tenant with the written
         opinion of Landlord's  architect or construction  consultant as to when
         the  restoration  work  required of Landlord may be  completed.  Tenant
         shall have the option to  terminate  this Lease in the event any of the
         following  occurs,  which option may be  exercised  only by delivery to
         Landlord of a written notice of election to terminate  within seven (7)
         days after  Tenant  receives  from  Landlord  the  estimate of the time
         needed to complete such restoration:

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                                                                       Quantum 3

                           (1) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors or invitees)  and, in the reasonable  opinion of Landlord's
         architect or  construction  consultant,  the  restoration of the Leased
         Premises cannot be  substantially  completed  within 180 days after the
         date of such damage (subject to force majeure conditions); or

                           (2) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors  or invitees)  within twelve (12) months of the last day of
         the Lease term, and, in the reasonable opinion of Landlord's  architect
         or  construction  consultant,  the  restoration of the Leased  Premises
         cannot be substantially completed within sixty (60) days after the date
         of such damage and Tenant has not  exercised  its Option to Extend said
         Term (or Extended Term as the case may be)."

        18.  LIABILITY  INSURANCE:  Effective  as of the  first day of the Third
Option Period, the first sentence of Lease Paragraph 10 ("Liability  Insurance")
shall be deleted and replaced with the following:  "Tenant, at Tenant's expense,
agrees to keep in force  during  the Term of this  Lease a policy of  commercial
general liability insurance with combined single limit coverage of not less than
Two Million Dollars  ($2,000,000)  per occurrence for bodily injury and property
damage occurring in, on or about the Premises,  including parking and landscaped
areas."

         19. LIMITATION OF LIABILITY: Effective as of the first day of the Third
Option Period,  Lease Paragraph 36 ("Limitation of Liability")  shall be deleted
in its entirety and replaced with the following:

                  "36.  LIMITATION OF LIABILITY In consideration of the benefits
         accruing hereunder,  Tenant and all successors and assigns covenant and
         agree that,  in the event of any actual or alleged  failure,  breach or
         default hereunder by Landlord:

         (i) the sole and exclusive remedy shall be against Landlord's  interest
         in the Premises leased herein;
         (ii) no  partner of  Landlord  shall be sued or named as a party in any
         suit or action  (except as may be necessary to secure  jurisdiction  of
         the partnership);
         (iii) no  service  of  process  shall be made  against  any  partner of
         Landlord  (except as may be  necessary  to secure  jurisdiction  of the
         partnership);
         (iv) no partner of Landlord  shall be  required to answer or  otherwise
         plead to any service of process;
         (v) no judgment will be taken against any partner of Landlord;
         (vi) any judgment  taken against any partner of Landlord may be vacated
         and set aside at any time without hearing;
         (vii) no writ of  execution  will ever be levied  against the assets of
         any partner of Landlord;
         (viii) these covenants and agreements are enforceable  both by Landlord
         and also by any partner of Landlord.

                  Tenant  agrees  that  each  of  the  foregoing  covenants  and
         agreements  shall be  applicable  to any covenant or  agreement  either
         expressly  contained  in this  Lease or imposed by statute or at common
         law."

         EXCEPT AS MODIFIED HEREIN, all other terms,  covenants,  and conditions
of said April 10, 1992 Lease Agreement shall remain in full force and effect. 
                                       |
                                       |
                                       |
                     (This Space Left Blank Intentionally)
                                       |
                                       |
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<PAGE>
                                                                       Quantum 3

         IN WITNESS  WHEREOF,  Landlord and Tenant have executed this  Amendment
No. 1 to Lease as of the day and year last written below.

LANDLORD:                                   TENANT:

JOHN ARRILLAGA SURVIVOR'S                   QUANTUM CORPORATION                 
TRUST                                       a Delaware corporation              
                                                                                
                                                                                
By /s/ John Arrillaga                       By  /s/ Andrew Kryder               
   ------------------                           -----------------
John Arrillaga, Trustee                                                         

Date:  6/30/97                              Andrew Kryder                       
     ---------                              ---------------------
                                            Print or Type Name                  
                                                                        
RICHARD T. PEERY SEPARATE                   Title: FINANCE AND CORP GENERAL  
PROPERTY TRUST                                     COUNSEL
                                                   ------------------------
                                            

By /s/ Richard T. Peery                     Date:  June 25, 1997
   -------------------                           ---------------
Richard T. Peery, Trustee

Date: 6/26/97
     --------


                                    Page 14
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                                                                Initial:   ALK
                                                                         -------

<PAGE>
                                                                       Quantum 2
                                 AMENDMENT NO. 3
                                    TO LEASE

         THIS  AMENDMENT  NO. 3 is made and entered into this 16th day of April,
1997, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated
7/20/77  (JOHN  ARRILLAGA  SURVIVOR'S  TRUST)  (previously  known  as the  "John
Arrillaga Separate Property Trust") as amended,  and RICHARD T. PEERY,  Trustee,
or his Successor  Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE  PROPERTY
TRUST) as amended, collectively as LANDLORD, and QUANTUM CORPORATION, a Delaware
corporation, as TENANT.

                                    RECITALS

         A. WHEREAS,  by Lease  Agreement dated October 31, 1989 Landlord leased
to Tenant all of that certain  176,516+/-  square foot  building  located at 500
McCarthy Blvd., Milpitas, California, the details of which are more particularly
set forth in said October 31, 1989 Lease Agreement, and

         B. WHEREAS,  said Lease was amended by Letter  Agreement  dated October
31, 1989 which provided for a Basic Rent Credit for the period  commencing  with
the Lease Commencement Date and ending on May 31, 1991, and

         C. WHEREAS,  said Lease was amended by Letter Agreement dated April 24,
1990 which  canceled the reduction in Basic Rent Credit Letter dated October 31,
1989, and

         D.  WHEREAS,  said Lease was amended by Amendment No. 1 dated April 24,
1990 which which delayed the Lease  Commencement  Date from December 15, 1990 to
April 1, 1991, and,

         E.  WHEREAS,  said Lease was amended by the  Commencement  Letter dated
March 7, 1991 which  changed  the  Commencement  Date of the Lease from April 1,
1991 to April 7, 1991, and  established  the  Termination  Date of September 30,
2006, and,

         E.  WHEREAS,  said Lease was amended by  Amendment  No. 2 dated June 8,
1992 which replaced Lease Exhibit A and amended the description of the Premises,
and

         F.  WHEREAS,  it is now the desire of the  parties  hereto to amend the
Lease by (i) extending the Term for five  years,  changing the Termination  Date
from  September  30, 2006 to September  30, 2011,  (ii)  amending the Basic Rent
schedule and Aggregate Rent  accordingly,  (iii) adding a third Five Year Option
to Extend,  (iv) replacing  Paragraphs 41C ("Lease Terms  Co-extensive")  and 48
("Cross  Default") and 53  ("Structural  Capital Costs Regulated by Governmental
Agencies After the  Commencement  of this Lease not Caused by Tenant or Tenant's
Uses or Remodeling of the Premises"), (v) amending Lease Paragraph 12 ("Property
Insurance") and (vi) amending and/or replacing  certain  provisions of the Lease
commencing as of the  commencement  of the Third  Extended Term of said Lease as
hereinafter set forth.

                                   AGREEMENT

         NOW THEREFORE,  for valuable consideration,  receipt of which is hereby
acknowledged,  and in  consideration  of the hereinafter  mutual  promises,  the
parties hereto do agree as follows:

         1. TERM OF LEASE:  It is agreed  between  the  parties  that Tenant has
exercised  its First  Five-Year  Option to Extend the lease term of that certain
lease agreement  dated March 23, 1994 for premises  located at 1101 Sumac Drive,
Milpitas,  California  (the "Building 5 Lease"),  as detailed in Paragraph 41 of
said Building 5 Lease.  Paragraph 40C of said Building 5 Lease  provides that in
the  event  the  term of  said  Building  5 Lease  is  extended  for any  reason
whatsoever,  the terms of the  Existing  Leases  (i.e.  two of said leases dated
October  31,  1989 are for  Premises  1ocated at 1140  Technology  Drive and 500
McCarthy Blvd.,  Milpitas,  California  (the "1989 Leases");  one of said leases
dated September 17, 1990 is for Premises located at 1000 Sumac Drive,  Milpitas,
California
                                                                      RTP
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                                     Page 1
<PAGE>

                                                                       Quantum 2

and one of said leases dated April 10, 1992 is for Premises located at 900 Sumac
Drive,  Milpitas,  California)  shall also be  extended  so that all five Leases
expire on the same date;  therefore,  it is agreed  between the parties  that by
exercising  its  Option to Extend  the  Building  5 Lease,  Tenant has in effect
exercised its Option to Extend under Lease Paragraph 42 ("First Five-Year Option
to  Extend"),  and that  pursuant to said Lease  Paragraph  42, the Term of this
Lease Agreement  shall be extended for an additional  five (5) year period,  and
the Lease Termination Date shall be changed from September 30, 2006 to September
30, 2011.

         2. BASIC RENTAL FOR FIRST  EXTENDED  TERM OF LEASE:  The monthly  Basic
Rental for the First Extended Term of Lease shall be as follows:

         On  October 1,  2006,  the sum of THREE  HUNDRED  EIGHT  THOUSAND  NINE
HUNDRED THREE AND NO/100 DOLLARS  ($308,903.00) shall be due, and a like sum due
on the first day of each month  thereafter  through and  including  September 1,
2007.

         On October 1, 2007, the sum of THREE HUNDRED  SEVENTEEN  THOUSAND SEVEN
HUNDRED TWENTY EIGHT AND 80/100 DOLLARS  ($317,728.80)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September 1, 2008.

         On October 1, 2008,  the sum of THREE HUNDRED  TWENTY SIX THOUSAND FIVE
HUNDRED FIFTY FOUR AND 60/100 DOLLARS ($326,554.60) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2009.

         On October 1, 2009, the sum of THREE HUNDRED THIRTY FIVE THOUSAND THREE
HUNDRED EIGHTY AND 40/100 DOLLARS ($335,380.40) shall be due, and a like sum due
on the first day of each month  thereafter  through and  including  September 1,
2010.

         On October 1, 2010,  the sum of THREE  HUNDRED  FORTY FOUR THOUSAND TWO
HUNDRED SIX AND 20/100 DOLLARS ($344,206.20) shall be due, and a like sum due on
the first day of each month thereafter through and including September 1, 2011.

         The  Aggregate   Basic  Rent  for  the  Lease  shall  be  increased  by
$19,593,276.00 or from $44,409,491.18 to $64,002,767.18.

         3. THIRD FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the
Lease for an  additional  five (5) year period  pursuant to Lease  Paragraph  43
("Second Five Year Option To Extend"),  Landlord hereby grants to Tenant a third
option to extend the Term of this Lease for an  additional  five (5) year period
upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration of the Lease Term as extended pursuant to Lease Paragraph 43 ("Second
Five Year  Option To  Extend"),  in which  event the Lease  shall be  considered
extended  for an  additional  five (5) year  period  upon  the  same  terms  and
conditions as this Lease,  absent this  Paragraph 3 and subject to the Rental as
set forth  below.  In the event that Tenant  fails to timely  exercise  Tenant's
option as set forth herein in writing,  Tenant  shall have no further  option to
extend this Lease or the Other  Leases,  and this Lease  shall  continue in full
force and effect for the full remaining term hereof, absent this Paragraph 3.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is exercised:

            Period                               Monthly Basic Rent 
            ------                               -----------------  
            Months 1-12                              $2.25/sf
            Months 13-24                             $2.30/sf
            Months 25-36                             $2.35/sf
            Months 37-48                             $2.40/sf
            Months 49-60                             $2.45/sf
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<PAGE>

                                                                       Quantum 2

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this  Paragraph 3 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 3 notwithstanding such non-curable default.

         4.  LEASE  TERMS  CO-EXTENSIVE:   Lease  Paragraph  40C  ("Lease  Terms
Co-extensive")  is  hereby  deleted  in  its  entirety  and  replaced  with  the
following:

                  "40C. LEASE TERMS  CO-EXTENSIVE:  It is acknowledged  that (i)
         Landlord and Tenant have  previously  executed four separate  leases in
         addition to this Lease:  one of said leases  dated  October 31, 1989 is
         for Premises  located at 1140 Technology  Drive,  Milpitas,  California
         (the "Building One Lease"); one of said leases dated September 17, 1990
         is for Premises located at 1000 Sumac Drive, Milpitas,  California (the
         "Building Four Lease");  one of said leases dated April 10, 1992 is for
         Premises  located  at  900  Sumac  Drive,  Milpitas,   California  (the
         "Building 3 Lease"); and one of said leases dated March 23, 1994 is for
         premises  located  at  1101  Sumac  Drive,  Milpitas,  California  (the
         "Building 5 Lease") (hereinafter collectively referred to as the "Other
         Leases");  and (ii) it is the intention of the parties that the term of
         this Lease be co-extensive with the term of the Other Leases, such that
         the terms of all five leases  ("the  Leases")  expire on the same date.
         The provisions of this Paragraph 40C also requires the terms of all the
         Leases to be extended  accordingly  if Tenant  exercises  its Option to
         Extend  under any of the  Leases.  The  monthly  Basic Rent  during the
         extended  term under each of the Leases  shall be increased by $.05 per
         square  foot  on  the  commencement  date  of  the  extended  term  and
         thereafter  on each and every  anniversary  of the  respective  lease's
         commencement date of the extended term."

         5.  CROSS  DEFAULT:  Lease  Paragraph  48 ("Cross  Default")  is hereby
deleted in its entirety and replaced with the following:

                  "48. CROSS DEFAULT:  It is agreed between  Landlord and Tenant
         that a default  under this Lease,  or a default  under any of the Other
         Leases may, at the option of Landlord,  be  considered a default  under
         all Leases,  in which event Landlord shall be entitled (but in no event
         required) to apply all rights and remedies of Landlord  under the terms
         of one lease to all the Leases including, but not limited to, the right
         to  terminate  any or all of the  aforementioned  Other  Leases or this
         Lease by reason of a default under the Leases or hereunder.

                  Notwithstanding  the above,  Landlord shall have the option of
         considering  a default  under this Lease or a default  under any of the
         Other Leases to be a default  under all such leases,  only with respect
         to such leases under which  Landlord is also the 'Landlord' at the time
         such  default  occurs.  By way of example,  if at the time a default of
         Tenant  occurs  under  this  Lease,  Landlord  has  sold  the  premises
         described  in any of the Other  Leases and is no longer the  'Landlord'
         thereunder,  then a default  under this  Lease shall not  constitute  a
         default under any of such Other Leases so sold by Landlord  (unless the
         premises  leased  under this Lease and the Other Leases are sold to the
         same entity), and a default by Tenant under any of such Other Leases so
         sold by Landlord shall not constitute a default under this Lease or any
         other of the Other Leases then remaining  between  Landlord and Tenant.
         However,  if the Landlord  under this Lease and the Other Leases is one
         in the same at the time of said default,  said cross default provisions
         shall apply."

         6. STRUCTURAL  CAPITAL COSTS  REGULATED BY GOVERNMENTAL  AGENCIES AFTER
THE  COMMENCEMENT  OF THIS  LEASE  NOT  CAUSED BY  TENANT  OR  TENANT'S  USES OR
REMODELING  OF THE  PREMISES:  Lease  Paragraph 53  ("Structural  Capital  Costs
Regulated by  Governmental  Agencies  after the  Commencement  of this Lease Not
Caused by Tenant or
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                                                                       Quantum 2

Tenant's  Uses or Remodeling  of the  Premises") is hereby  deleted and replaced
with the following:

                  "53.   STRUCTURAL  CAPITAL  COSTS  REGULATED  BY  GOVERNMENTAL
         AGENCIES AFTER THE  COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR
         TENANT'S USES OR REMODELING  OF THE  PREMISES:  The  provisions of this
         Paragraph 53 shall modify Paragraphs 7 and 14:

                  A. If (i) during the last five (5) years of the First Extended
         Term of the Lease if said Lease has not been  extended as provided  for
         in Lease  Paragraph  43  ("Second  Five Year  Option To  Extend") or in
         Paragraph 3 ("Third Five Year Option to Extend") or Paragraph 4 ("Lease
         Terms Co-Extensive")  above, or (ii) during either of the five (5) year
         extension  periods  permitted by Lease  Paragraph 43 or Paragraph 3, or
         Paragraph  4  above,  it  becomes  necessary  (due to any  governmental
         requirement for continued occupancy of the Premises) to make structural
         improvements  required by laws enacted or legal requirements imposed by
         governmental  agency(s) after the  Commencement  Date, and the cost for
         each required work or improvements exceeds $100,000, then if such legal
         requirement  is not  imposed  because of Tenant's  specific  use of the
         Premises and is not  "triggered"  by Tenant's  Alterations  or Tenant's
         application  for a building permit or any other  governmental  approval
         (collectively  "Tenant's  Actions") in which  instance  Tenant shall be
         responsible for 100% of the cost of such  improvements,  Landlord shall
         be responsible for paying the cost of such improvement and constructing
         such  improvement,  subject  to a cash  contribution  from  Tenant of a
         portion of the cost thereof as provided for and calculated in Paragraph
         53B.

                 B. When  Landlord  makes an  improvement  pursuant to Paragraph
         53A,  and as a condition to  Landlord's  obligation  to construct  such
         improvement,  Tenant shall make the following  contribution  in cash to
         Landlord for the cost thereof prior to the  commencement of the work by
         Landlord.  It is agreed that Tenant  shall pay to Landlord  100% of the
         cost of the  first  $100,000.00  worth of each  improvement.  After the
         first  $100,000.00,  all costs above $100,000.00 shall be divided by 15
         and  multiplied by the time period  remaining in the last five years of
         the Lease Term from the date work on such improvement commences.

                  For example, if the improvement is not required as a result of
         Tenant's  Actions and if the cost of such  improvement was $400,000 and
         there was one year and six months  remaining in the Lease term when the
         work  commenced,  then  Tenant  would be  responsible  for  reimbursing
         Landlord in cash $130,000.00 computed as follows:

        Total Cost of Work                             $400,000.00      
        Tenant Responsible for                                          
          1st $100,000                                 -100.000.00
                                                       -----------      
        Total Amount To Be Amortized                   $300,000.00      
                                                       
        $300,000.00/15 = $20,000.00/yr. x 1.5 yrs =    $ 30,000.00
        
        Tenant responsible for $100,000 + $30,000.00 = $130,000.00
        
                  C. If Landlord  has made  improvements,  for which  Tenant has
         reimbursed Landlord for the cost thereof pursuant to Paragraph 53B, and
         the  term  of this  Lease  is  subsequently  extended  pursuant  to the
         exercise by Tenant of an option to renew pursuant to Lease Paragraph 43
         or  Paragraph 3 above,  upon the exercise of any such option by Tenant,
         Tenant  shall  pay to  Landlord  an  additional  sum equal to the total
         amount  of said  improvement  less the  amount  previously  paid for by
         Tenant.  Using the example in  Paragraph  53B above,  Tenant  would owe
         Landlord  the   additional   amount  of   $270,000.00   ($400,000.00  -
         $130,000.00 = $270,000.00)."
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                                                                       Quantum 2

         7. PROPERTY  INSURANCE:  Lease  Paragraph 12 ("Property  Insurance") is
hereby amended to include the following:  "Tenant  acknowledges  that as part of
the cost of insurance  policies for the Premises,  Tenant is responsible for the
payment of  insurance  deductibles  on  insurance  claims as they  relate to the
Premises  subject to the  limitations  provided in Lease Paragraph 55 ("Property
Insurance")  which limitations are applicable only during the initial Lease Term
and the First Lease Extension Period and the Second Lease Extension Period. Said
limitation  provided  for  in  Lease  Paragraph  55 are  null  and  void  at the
commencement of the Third Lease Extended Term".

         8. THIRD OPTION PERIOD - LEASE PROVISION  CHANGES:  In the event Tenant
exercises  its Third Option to Extend as provided for in Paragraph 3 above,  the
following amendments  (contained within Paragraphs 9 through 19) are herein made
to the Lease to be effective  upon the  commencement  of the third option period
("Third Option  Period"),  or during any period  following the expiration of the
Lease  Term or  expiration  of the Lease  when  Tenant is in  possession  of the
Premises.

         9. LATE  CHARGE:  Effective  as of the  first  day of the Third  Option
Period,  the Late Charge referenced in Lease Paragraph 4.D ("Late Charge") shall
be changed from five percent (5%) to ten percent (10%),  and Lease  Paragraph 50
("Limitation on Late Charge") shall be deleted in its entirety and of no further
force or effect.

         10.  MANAGEMENT  FEE:  Notwithstanding  anything to the contrary in the
Lease,  effective  as of the first day of the Third  Option  Period,  and on the
first day of each month thereafter, Tenant shall pay to Landlord, in addition to
the Basic Rent and Additional Rent, a fixed monthly  management fee ("Management
Fee") equal to one percent  (1%) of the Basic Rent due for each month during the
Lease Term.

         11.  HAZARDOUS  MATERIALS:  Effective  as of the first day of the Third
Option Period,  Lease Paragraph 45 ("Hazardous  Materials")  shall be deleted in
its entirety and replaced with the following:

                  "45. HAZARDOUS MATERIALS: Landlord and Tenant agree as follows
         with  respect to the  existence  or use of  "Hazardous  Materials"  (as
         defined  herein) on, in, under or about the Premises and real  property
         located beneath said Premises, which includes the entire parcel of land
         on which the Premises are located as shown in Green on Exhibit A to the
         Lease (hereinafter collectively referred to as the "Property"): ,

                  A. As used herein,  the term "Hazardous  Materials" shall mean
         any  material,  waste,  chemical,  mixture  or  byproduct  which  is or
         hereafter is defined,  listed or designated  under  Environmental  Laws
         (defined below) as a pollutant,  or as a contaminant,  or as a toxic or
         hazardous  substance,  waste or  material,  or any  other  unwholesome,
         hazardous,   toxic,  biohazardous,   or  radioactive  material,  waste,
         chemical,  mixture  or  byproduct,  or which is  listed,  regulated  or
         restricted by any  Environmental  Law (including,  without  limitation,
         petroleum  hydrocarbons  or any distillates or derivatives or fractions
         thereof,  polychlorinated  biphenyls, or asbestos). As used herein, the
         term "Environmental  Laws" shall mean any applicable Federal,  State of
         California or local  government  law (including  common law),  statute,
         regulation,  rule,  ordinance,  permit,  license,  order,  requirement,
         agreement, or approval, or any determination,  judgment,  directive, or
         order of any  executive or judicial  authority at any level of Federal,
         State of  California  or local  government  (whether  now  existing  or
         subsequently  adopted or  promulgated)  relating  to  pollution  or the
         protection of the environment,  ecology,  natural resources,  or public
         health and safety.

                  B. Tenant shall notify Landlord prior to the occurrence of any
         Tenant's  Hazardous  Materials  Activities  (defined  below).  Landlord
         acknowledges  that Tenant  shall use,  in  compliance  with  applicable
         Environmental  Laws,  customary  household and office supplies  (Tenant
         shall first provide  Landlord with a list of said materials  use), such
         as mild cleaners,  lubricants and copier toner. Any and all of Tenant's
         Hazardous  Materials  Activities  shall be conducted in conformity with
         this Paragraph
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                                                                       Quantum 2

         45,   Paragraph  14  of  this  Lease,   and  in  compliance   with  all
         Environmental Laws and regulations.  As used herein, the term "Tenant's
         Hazardous  Materials  Activities" shall mean any and all use, handling,
         generation,  storage,  disposal,  treatment,  transportation,  release,
         discharge,  or emission of any Hazardous Materials on, in, beneath, to,
         from, at or about the Property,  in connection with Tenant's use of the
         Property,  or by  Tenant  or by  any  of  Tenant's  agents,  employees,
         contractors,  vendors,  invitees,  visitors or its future subtenants or
         assignees or other third  parties  (including  "dumping" by others) (or
         which Hazardous  Materials originate on the surface of the Premises any
         time on or after the  Commencement  Date of this Lease,  but  excluding
         Hazardous  Materials  on the Premises  prior to the Lease  Commencement
         Date because of the storage,  use, disposal,  or transportation of such
         materials  or  waste  by any of  Landlord's  contractors  or  otherwise
         arising out of construction work performed by or under the direction of
         Landlord on the  Premises  and Landlord  shall be  responsible  for all
         required  actions  with respect to such  materials  or wastes).  Tenant
         agrees to provide  Landlord with prompt  written notice of any spill or
         release of Hazardous  Materials at the Property  during the term of the
         Lease of which  Tenant  becomes  aware,  and further  agrees to provide
         Landlord with prompt written  notice of any violation of  Environmental
         Laws in connection  with  Tenant's  Hazardous  Materials  Activities of
         which Tenant becomes aware. If Tenant's Hazardous Materials  Activities
         involve  Hazardous   Materials  other  than  normal  use  of  customary
         household and office supplies,  Tenant also agrees at Tenant's expense:
         (i)  to  install  such  Hazardous  Materials  monitoring,  storage  and
         containment   devices  as  may  be  required  by  Environmental   Laws,
         regulations and/or governing agencies;  (ii) to provide Landlord with a
         written inventory of such Hazardous  Materials,  including an update of
         same each year upon the anniversary  date of the  Commencement  Date of
         the Lease  ("Anniversary  Date"); and (iii) on each Anniversary Date to
         provide to Landlord copies of all documentation  and records,  required
         by  applicable  Environmental  Laws to be  prepared  and  submitted  to
         governmental authorities,  relating to use at the Property of Hazardous
         Materials or to Tenant's  Hazardous  Materials  Activities,  if any. If
         upon completion of Landlord's review of said documentation and records,
         Landlord  reasonably  questions  if  Tenant is in  compliance  with all
         applicable  Environmental  Laws  with  respect  to  Tenant's  Hazardous
         Materials  Activities,  Tenant agrees within thirty (30) days following
         receipt  of  written  notice  from  Landlord,  to  retain  a  qualified
         environmental  consultant,  acceptable to Landlord, to evaluate whether
         Tenant is in compliance  with all  applicable  Environmental  Laws with
         respect to Tenant's  Hazardous  Materials  Activities.  Tenant,  at its
         expense,  shall  submit to  Landlord a report  from such  environmental
         consultant  which  discusses the  environmental  consultant's  findings
         within two (2) months of each Anniversary Date. Tenant, at its expense,
         shall promptly undertake and complete any and all steps necessary,  and
         in full compliance with applicable Environmental Laws, to fully correct
         any and all problems or  deficiencies  identified by the  environmental
         consultant,  and promptly  provide  Landlord with  documentation of all
         such corrections.

                  C. Prior to termination or expiration of the Lease, Tenant, at
         its expense,  shall (i) properly remove from the Property all Hazardous
         Materials  which come to be located at the Property in connection  with
         Tenant's Hazardous Materials Activities, and (ii) fully comply with and
         complete all facility closure requirements of applicable  Environmental
         Laws regarding Tenant's Hazardous Materials  Activities,  including but
         not limited to (x) properly restoring and repairing the Property to the
         extent damaged by such closure  activities,  and (y) obtaining from the
         local Fire Department or other appropriate  governmental authority with
         any legal or regulatory jurisdiction a written concurrence that closure
         has been completed in compliance  with applicable  Environmental  Laws.
         Tenant  shall  promptly  provide  Landlord  with  copies of any claims,
         notices,  work plans, data and reports prepared,  received or submitted
         in connection with any such closure activities.

                  D. If Landlord,  upon  consultation  with  Tenant,  reasonably
         concludes  that the  Property  has become  contaminated  as a result of
         Tenant's Hazardous  Materials  Activities,  Landlord in addition to any
         other rights it may have under this Lease or under  Environmental  Laws
         or other laws,  may enter upon the  Property  and  conduct  inspection,
         sampling  and  analysis,  including  but not limited to  obtaining  and
         analyzing samples  of  soil  and   groundwater,   for  the  purpose  of
         determining the nature and extent
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                                                                       Quantum 2

         of such contamination  except to the extent that such activities may be
         inconsistent with Tenant's  compliance with Environmental  Laws. Tenant
         shall   promptly   reimburse   Landlord   for  the  costs  of  such  an
         investigation,  including but not limited to reasonable attorneys' fees
         Landlord incurs with respect to such  investigation to the extent,  and
         only  to  the  extent,  that  it  that  discloses  Hazardous  Materials
         contamination  for which Tenant is liable  under this Lease.  Except as
         may be  required of Tenant by  applicable  Environmental  Laws,  Tenant
         shall not perform any  sampling,  testing,  or drilling to identify the
         presence of any Hazardous Materials at the Property, without Landlord's
         prior written consent which shall not be unreasonably withheld.  Tenant
         shall  promptly  provide  Landlord with copies of any claims,  notices,
         work  plans,  data and  reports  prepared,  received  or  submitted  in
         connection with any sampling, testing or drilling performed pursuant to
         the preceding sentence.

                  E.  Tenant  shall   indemnify,   defend  (with  legal  counsel
         acceptable  to  Landlord,  whose  consent  shall  not  unreasonably  be
         withheld)  and  hold  harmless   Landlord,   its  employees,   assigns,
         successors, successors-in-interest, agents and representatives from and
         against  any and all claims  (including  but not limited to third party
         claims from a private  party or a government  authority),  liabilities,
         obligations,   losses,   causes  of   action,   demands,   governmental
         proceedings or directives, fines, penalties, expenses, costs (including
         but not  limited  to  reasonable  attorneys',  consultants'  and  other
         experts' fees and costs),  and damages,  which arise from or relate to:
         (i)  Tenant's  Hazardous  Materials  Activities;   (ii)  any  Hazardous
         Materials contamination caused by Tenant prior to the Commencement Date
         of the Lease;  or (iii) the breach of any  obligation  of Tenant  under
         this    Paragraph    45    (collectively,    "Tenant's    Environmental
         Indemnification"). Tenant's Environmental Indemnification shall include
         but is not limited to the  obligation  to promptly and fully  reimburse
         Landlord for losses in or reductions to rental  income,  and diminution
         in  fair  market  value  of  the   Property.   Tenant's   Environmental
         Indemnification  shall  further  include  but  is  not  limited  to the
         obligation  to  diligently  and properly  implement to  completion,  at
         Tenant's  expense,  any and all environmental  investigation,  removal,
         remediation,   monitoring,  reporting,  closure  activities,  or  other
         environmental   response  action  as  may  be  required  by  applicable
         Environmental  Laws,  regulations or governing agencies  (collectively,
         "Response Actions"). Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any Response Actions.

                  F.  Landlord  hereby makes the  following  representations  to
         Tenant, each of which is made only to the best of Landlord's  knowledge
         as of the date  Landlord  executes  this Lease,  without any inquiry or
         investigation  having been made or required by Landlord  regarding this
         subject,  nor does Landlord have any  obligation to investigate or make
         inquiry regarding the subject:

                           (1)  The  soil  and  ground  water  on or  under  the
         Premises does not contain Hazardous  Materials in amounts which violate
         any laws to the  extent  that any  governmental  entity  could  require
         either  Landlord or Tenant to take any remedial  action with respect to
         such Hazardous Materials.

                           (2)  During  the time  that  Landlord  has  owned the
         Premises,  Landlord  has  received no notice of (i) any  violation,  or
         alleged  violation,  of any law  that  has not  been  corrected  to the
         satisfaction  of the  appropriate  authority,  (ii) any pending  claims
         relating to the  presence of  Hazardous  Material on the  Premises,  or
         (iii) any pending  investigation by any governmental  agency concerning
         the Premises relating to Hazardous Materials.

                  G.  Landlord and Tenant shall each give written  notice to the
         other  as  soon as  reasonably  practicable  of (i)  any  communication
         received from any governmental authority concerning Hazardous Materials
         which  relates  to the  Premises,  and  (ii) any  contamination  of the
         Premises by Hazardous  Materials  which  constitutes a violation of any
         law.  Attached  as  Exhibit  "C" to the  Lease  is a list of  Hazardous
         Materials  that Tenant  intends to use at the  Premises.  If during the
         Lease Term  Tenant  proposes to use other  Hazardous  Materials  at the
         Premises,  Tenant shall inform  Landlord of such use,  identifying  the
         Hazardous Materials and the manner of their use, storage and 
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                                                                       Quantum 2

         disposal,  and  shall  agree  (i) to use,  store  and  dispose  of such
         Hazardous  Materials strictly in compliance with all laws,  regulations
         and  governing  agencies  and (ii)  that  the  indemnity  set  forth in
         Paragraph  45 shall be  applicable  to Tenant's  use of such  Hazardous
         Material.

                  H. Landlord or Tenant may, at any time, cause testing wells to
         be  installed  on the  Premises,  and may cause the ground  water to be
         tested to detect the presence of Hazardous  Material by the use of such
         tests as are then  customarily  used for such  purposes.  Testing wells
         installed by Tenant shall be paid for by Tenant.  If tests conducted by
         Landlord  disclose  that Tenant has  violated any  Hazardous  Materials
         laws,  or Tenant or  parties  on the  Premises  during the Term of this
         Lease have  contaminated  the  Premises  as  determined  by  regulatory
         agencies  pursuant  to  Hazardous  Materials  laws,  or that Tenant has
         liability to Landlord  pursuant to Paragraph 45A, then Tenant shall pay
         for 100 percent of the cost of the test and all related expense.  Prior
         to the  expiration  of the Lease Term,  Tenant shall remove any testing
         wells it has installed at the Premises,  and return the Premises to the
         condition  existing  prior to the  installation  of such wells,  unless
         Landlord  requests  in  writing  that  Tenant  leave all or some of the
         testing  wells in which  instance the wells  requested to be left shall
         not be removed.

                  I. If any tests  performed by Tenant or Landlord  prior to the
         Commencement  Date  disclose  Hazardous   Materials  at  the  Premises,
         Landlord  at its  expense  will  promptly  take all  reasonable  action
         required  by law  with  respect  to the  existence  of  such  Hazardous
         Materials at the Premises.  The Commencement  Date shall not be delayed
         because of such action by Landlord unless occupation of the Premises is
         prohibited by law.

                  J. The obligations of Landlord and Tenant under this Paragraph
         45 shall survive the  expiration or earlier  termination of the Term of
         this Lease.  The rights and  obligations  of  Landlord  and Tenant with
         respect to issues  relating  to  Hazardous  Materials  are  exclusively
         established by this Paragraph 45."

         12. SECURITY DEPOSIT: Effective as of the first day of the Third Option
Period, Lease Paragraph 51 ("Security Deposit") shall be deleted in its entirety
and replaced with the following:

                  "51. SECURITY DEPOSIT:  The following  provisions shall modify
         Lease Paragraph 4F:

                  A.  Within  thirty (30) days after the  expiration  or earlier
         termination  of the  Lease  term  and  after  Tenant  has  vacated  the
         Premises,  Landlord shall return to Tenant the entire Security  Deposit
         except for amounts that Landlord has deducted therefrom that are needed
         by Landlord to cure  defaults of Tenant  under the Lease or  compensate
         Landlord for damages for which Tenant is liable pursuant to this Lease.
         The use or disposition of the Security  Deposit shall be subject to the
         provisions of California Civil Code Section 1950.7.

                  B.  During  the  first  thirty  (30) days  following  Tenant's
         exercise of its Third Option to Extend, and only during said thirty day
         period,  Tenant  shall  have the  one-time  option  of  satisfying  its
         obligation   with  respect  to  an  amount  equal  to  one-half   (1/2)
         ($238,296.60) of the $476,593.20  Security Deposit required under Lease
         Paragraph 4F by providing to Landlord,  at Tenant's sole cost, a letter
         of credit which: (i) is drawn upon an institutional  lender  reasonably
         acceptable  and  accessible to Landlord in form and content  reasonably
         satisfactory  to Landlord;  (ii) is in the amount of one-half  (1/2) of
         the  Security  Deposit;  (iii)  is for a term of at lease  twelve  (12)
         months;  (iv) with respect to any letter of credit in effect within the
         six month period immediately prior to the expiration of the Lease term,
         shall  provide  that the term of such letter of credit  shall extend at
         least forty five (45) days past the Lease  expiration  date  (including
         any  extensions  thereof);  and (v) may be drawn upon by Landlord  upon
         submission of a  declaration  of Landlord that Tenant is in default (as
         defined in  Paragraph  19 and as modified by  Paragraph  60).  Landlord
         shall  not  be   obligated   to  furnish   proof  of  default  to  such
         institutional lender, and Landlord  shall only  be required to give the
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         institutional lender written notification that Tenant is in default and
         upon   receiving   such   written   notification   from   Landlord  the
         institutional  lender shall be obligated to immediately deliver cash to
         Landlord equal to the amount Landlord may spend or become  obligated to
         spend by reason of Tenant's  default or to compensate  Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's  default
         up to 1/2 of the total Security  Deposit required under Lease Paragraph
         4F. Said letter of credit shall provide that if the letter of credit is
         not renewed,  replaced or extended within twenty (20) days prior to its
         expiration  date the issuer of the credit shall  automatically  issue a
         cashiers  check  payable  to  Landlord  in the  amount of the letter of
         credit  after the date which is twenty (20) days before the  expiration
         date, and no later than the  expiration  date,  without  Landlord being
         required to make demand upon the letter of credit.  If Tenant  provides
         Landlord  with a letter  of  credit,  within  thirty  (30)  days of the
         execution of this Lease, meeting the foregoing  requirements,  one-half
         (1/2)  of  the  cash  Security   Deposit  (i.e.,   $238.296.60  of  the
         $476.593.20  Security  Deposit) shall be returned to Tenant by Landlord
         inasmuch as the cash deposit  remaining  and the Letter of Credit equal
         the total Security  Deposit  required in Lease  Paragraph 4F. If Tenant
         defaults with respect to any  provisions  of this Lease,  including but
         not limited to provisions relating to the payment of Rent, Landlord may
         (but  shall not be  required  to) draw down on the letter of credit for
         payment  of any sum which  Landlord  may spend or become  obligated  to
         spend by reason of Tenant's default,  or to compensate Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's default.
         Landlord  and Tenant  acknowledge  that such  letter of credit  will be
         treated  as if it were a cash  security  deposit,  and such  letter  of
         credit may be drawn down upon by Landlord upon demand and  presentation
         of  evidence of the  identity  of Landlord to the issuer,  in the event
         that Tenant  defaults  with respect to any  provision of this Lease and
         such  default  is  not  cured  within  any   applicable   cure  period.
         Notwithstanding  anything to the contrary in this Lease, Landlord shall
         not be  obligated  to furnish  proof of  default to such  institutional
         lender and Landlord is only required to give the  institutional  lender
         written  notification that Tenant is in default and upon receiving such
         written  notification from Landlord the  institutional  lender shall be
         obligated to  immediately  deliver cash to Landlord equal to the amount
         Landlord  may spend or become  obligated to spend by reason of Tenant's
         default,  or to  compensate  Landlord  for  any  loss or  damage  which
         Landlord  may  suffer by reason of  Tenant's  default  up to 1/2 of the
         total Security Deposit.  Landlord  acknowledges that it is not entitled
         to draw down such  letter of credit  unless  Landlord  would  have been
         entitled to draw upon the cash security  deposit  pursuant to the terms
         of  Paragraph  4F of the Lease.  Concurrently  with the delivery of the
         required  information  to the issuer,  Landlord shall deliver to Tenant
         written  evidence  of the  default  upon which the draw down was based,
         together with evidence that Landlord has provided to Tenant the written
         notice  of  such  default  which  was  required  under  the  applicable
         provision  of the Lease,  and evidence of the failure of Tenant to cure
         such default within the applicable  grace period  following  receipt of
         such notice of default.  Any  proceeds  received by Landlord by drawing
         upon the  letter of credit  shall be  applied  in  accordance  with the
         provisions governing the Security Deposit imposed by Lease Paragraph 4F
         and this  Paragraph  51. If  Landlord  draws upon the letter of credit,
         thereafter  Tenant  shall once again have the right to post a letter of
         credit in place of one-half (1/2) of a cash Security Deposit so long as
         Tenant is not then in default. In any event Tenant will be obligated to
         replenish  the amount  drawn to  restore  the  Security  Deposit to its
         original  amount as provided for in Paragraph 4F. If any portion of the
         letter of credit is used or  applied  pursuant  hereto,  Tenant  shall,
         within ten (10) days after  receipt of a written  demand  therefor from
         Landlord,  restore and replace the value of such security by either (i)
         depositing cash with Landlord in the amount equal to the sum drawn down
         under the letter of credit,  or (ii) increasing the letter of credit to
         its value immediately  prior to such  application.  Tenant's failure to
         replace the value of the security as provided in the preceding sentence
         shall be a material breach of its obligation under this Lease."

         13.  REAL  ESTATE  TAXES:  Effective  as of the  first day of the Third
Option Period,  Lease Paragraph 54 ("Real Estate Taxes") shall be deleted in its
entirety and replaced with the following:

                  "54.  REAL  PROPERTY  TAXES:  Paragraph  9 is  modified by the
         following:
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<PAGE>

                                                                       Quantum 2

                  A. The term "Real Property  Taxes" shall not include  charges,
         levies  or fees  directly  related  to the use,  storage,  disposal  or
         release of Hazardous  Materials on the Premises unless directly related
         to Tenant's  Activities  at this site or on other sites  leased  and/or
         owned by Tenant;  however,  Tenant shall be responsible  for general or
         special tax and/or assessments  (related to Hazardous  Materials and/or
         toxic waste)  imposed on the Property  provided said special tax and/or
         assessment is not imposed due to on-site  originated  contamination  on
         the  Property  (by third  parties not  related to Tenant)  prior to the
         Lease  Commencement  Date.  Subject to the terms and conditions  stated
         herein,  Tenant  shall be  responsible  for paying one hundred  percent
         (100%) of said taxes and/or assessments allocated to the Property.

                  B. If any  assessments  for  public  improvements  are  levied
         against the Premises,  Landlord may elect either to pay the  assessment
         in full or to allow the  assessment to go to bond. If Landlord pays the
         assessment  in full,  Tenant  shall pay to Landlord or any  assignee or
         purchaser of the Premises each time payment of Real  Property  Taxes is
         made a sum  equal  to that  which  would  have  been  payable  (as both
         principal and interest)  had Landlord  allowed the  assessment to go to
         bond.

                  C.  Tenant at its cost shall have the right,  at any time,  to
         seek a  reduction  in the  assessed  valuation  of the  Premises  or to
         contest  any Real  Property  Taxes  that are to be paid by  Tenant.  If
         Tenant  seeks a reduction or contests  such Real  Property  Taxes,  the
         failure  on  Tenant's  part to pay such Real  Property  Taxes  being so
         contested  shall not  constitute  a default so long as Tenant  complies
         with the provisions of this  Paragraph.  Landlord shall not be required
         to join in any  proceeding  or  contest  brought  by Tenant  unless the
         provisions of any law require that the proceeding or contest be brought
         by or in the name of Landlord.  In that case Landlord shall join in the
         proceedings or contest or permit it to be brought in Landlord's name as
         long as Landlord is not  required  to bear any cost.  Tenant,  on final
         determination  of the proceeding or contest,  shall  immediately pay or
         discharge  its  share  of any Real  Property  Taxes  determined  by any
         decision  or  judgment  rendered,  together  with all  costs,  charges,
         interest,  and  penalties  incidental  to the decision or judgment.  If
         Tenant does not pay the Real  Property  Taxes when due  pursuant to the
         Lease and Tenant seeks a reduction or contests them as provided in this
         paragraph,  before the commencement of the proceeding or contest Tenant
         shall furnish to Landlord a surety bond in form reasonably satisfactory
         to Landlord issued by an insurance  company qualified to do business in
         California. The amount of the bond shall equal 125% of the total amount
         of Real Property Taxes in dispute and any such bond shall be assignable
         to any  lender  or  purchaser  of the  Premises.  The bond  shall  hold
         Landlord and the Premises  harmless from any damage  arising out of the
         proceeding or contest and shall insure the payment of any judgment that
         may be rendered."

         14.  PROPERTY  INSURANCE:  Effective  as of the  first day of the Third
Option Period,  section B of Lease Paragraph 55 ("Property  Insurance") shall be
deleted in its entirety and be of no further force or effect.

         15.  ASSIGNMENT  AND  SUBLETTING:  Effective as of the first day of the
Third Option Period,  Lease Paragraph 56 ("Assignment and Subletting")  shall be
deleted in its entirety and replaced with the following:

                  "56.  ASSIGNMENT AND SUBLETTING:  The following  modifications
         are made to Paragraph 16:

                  A. In the event that Tenant  seeks to make any  assignment  or
         sublease,  then  Landlord,  by  giving  Tenant  written  notice  of its
         election  within fifteen (15) days after  Tenant's  notice of intent to
         assign or sublease has been given to Landlord,  shall have the right to
         elect (i) to withhold its consent to such  assignment  or sublease,  as
         permitted  pursuant  to  Paragraph  16, or (ii) to permit  Tenant to so
         assign the Lease or sublease such part of the Premises,  in which event
         Tenant may do so, but without  being  released of its liability for the
         performance  of  all  of its  obligations  under  the  Lease,  and  the
         following  shall apply (except the following  shall not apply to a 
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                                                                       Quantum 2

         "Permitted Transfer" described in Paragraph 57):

                           (1) If Tenant  assigns  its  interest  in this Lease,
         then in addition to the rental provided for in this Lease, Tenant shall
         pay to Landlord fifty percent (50%) of all Rent and other consideration
         received  by  Tenant  over and above (i) the  assignee's  agreement  to
         assume  the  obligations  of  Tenant  under  this  Lease  and  (ii) all
         "Permitted   Transfer  Costs"  (as  defined  herein)  related  to  such
         assignment.  As used herein, the term "Permitted  Transfer Costs" shall
         mean all  reasonable  leasing  commissions  paid to third  parties  not
         affiliated with Tenant in order to obtain the assignment or sublease in
         question.

                           (2) If Tenant  sublets  all or part of the  Premises,
         then Tenant shall pay to Landlord in addition to the Rent  provided for
         in this Lease fifty percent (50%) of the positive  difference,  if any,
         between (i) all rent and other consideration paid or provided to Tenant
         by the  subtenant,  less  (ii)  all Rent  paid by  Tenant  to  Landlord
         pursuant to this Lease which is allocable to the area so sublet and all
         Permitted  Transfer  Costs related to such  sublease.  After Tenant has
         recovered all Permitted Transfer Costs Tenant shall pay to Landlord the
         amount specified in the preceding  sentence on the same basis,  whether
         periodic or in lump sum, that such rent and other consideration is paid
         to Tenant by its subtenant,  within seven (7) days after it is received
         by Tenant.

                           (3)  Tenant's  obligations  under  this  subparagraph
         shall survive any assignment or sublease.  At the time Tenant makes any
         payment to Landlord required by this subparagraph, Tenant shall deliver
         an  itemized  statement  of the  method  by which  the  amount to which
         Landlord is entitled  was  calculated,  certified by Tenant as true and
         correct.  Landlord  shall have the right to inspect  Tenant's books and
         records  relating to the payments  due  pursuant to this  subparagraph.
         Upon request  therefor,  Tenant shall deliver to Landlord copies of all
         bills,  invoices or other  documents  upon which its  calculations  are
         based.

                           (4) As used herein,  the term  "consideration"  shall
         mean  any  consideration  of  any  kind  received,  or to  be  received
         (including,   but  not  limited  to,  services  rendered  and/or  value
         received) by Tenant as a result of the assignment or sublease,  if such
         sums are paid or provided to Tenant for Tenant's interest in this Lease
         or in the Premises.

                           (5)  This   Paragraph   56.A  does  not  apply  to  a
         "Permitted  Transfer",  as provided in Paragraph 57 hereof. The parties
         agree  that  if any  of the  following  transactions  occur  and do not
         qualify as "Permitted Transfers", Tenant must obtain Landlord's consent
         to such  transaction  and if Landlord  consents to any of the following
         transactions  which do not otherwise qualify as "Permitted  Transfers",
         then the  provisions  of this  Paragraph  56.A  shall  not apply to the
         following   transactions:   (i)  a  merger,   consolidation   or  other
         reorganization in which Tenant is not the surviving corporation so long
         as 95%  of  all  assets  and  liabilities  of  Tenant  are  permanently
         transferred to such assignee; and (ii) an assignment of this Lease to a
         corporation  which  purchases or otherwise  acquires 95% or more of the
         assets of Tenant so long as 95% of all assets and liabilities of Tenant
         are permanently  transferred to such assignee and Tenant remains liable
         and  responsible  under the Lease to the  extent  Tenant  continues  in
         existence following such transaction."

         16. PERMITtED ASSIGNMENTS AND SUBLEASES:  Effective as of the first day
of the Third Option  Period,  Lease  Paragraph 57  ("Permitted  Assignments  and
Subleases") shall be deleted in its entirety and replaced with the following:

                  "57.  PERMITTED  ASSIGNMENTS  AND  SUBLEASES:  Notwithstanding
         anything  contained  in  Paragraph  16,  so  long as  Tenant  otherwise
         complies with the provisions of Paragraph 16 and the Permitted Transfer
         does not release  Tenant  from its  obligations  hereunder,  Tenant may
         enter into any of the  following  transfers  (a  "Permitted  Transfer")
         without  Landlord's  prior  written  consent,  and  the  provisions  of
         Paragraph 56A shall not apply to any such Permitted Transfer:
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                                                                       Quantum 2

                           A. Tenant may sublease all or part of the Premises or
         assign its interest in this Lease to any corporation which controls, is
         controlled  by, or is under  common  control with Tenant by means of an
         ownership  interest of more than fifty percent (50%)  providing  Tenant
         remains  liable  for the  payment of Rent and full  performance  of the
         Lease;

                  B.  Tenant  may  assign  its   interest  in  the  Lease  to  a
         corporation  which  results  from  a  merger,  consolidation  or  other
         reorganization in which Tenant is not the surviving corporation so long
         as (i) 95% of all assets  and  liabilities  of Tenant  are  permanently
         transferred to such assignee, and (ii) immediately prior to the merger,
         consolidation  or other  reorganization,  the  corporation  into  which
         Tenant is to be merged has a net worth equal to or greater than the net
         worth of Tenant at the time of Lease  execution  or at the time of such
         assignment,  merger,  consolidation  or  reorganization  (whichever  is
         greater),  or if it does not,  Landlord  is  provided a guaranty of the
         Lease (in a form reasonably  acceptable to Landlord) from a corporation
         (a)  that is the  parent  of,  or is  otherwise  affiliated  with,  the
         corporation  into  which  Tenant is to be  merged,  and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the time of Lease execution or at the time of such assignment,  merger,
         consolidation or  reorganization  (whichever is greater).  In the event
         there is not a  permanent  transfer  of 95% or more of the  assets  and
         liabilities from Tenant to a third party, and Tenant continues to exist
         as a separate  entity,  both  companies  shall be jointly and severally
         liable for the full terms and conditions of the Lease;

                  C.  Tenant  may  assign  this  Lease  to a  corporation  which
         purchases or otherwise  acquires 95% or more of the assets of Tenant so
         long as 95% of all assets  and  liabilities  of Tenant are  permanently
         transferred  to such  assignee  (in the event  there is not a permanent
         transfer of 95% or more of the assets and liabilities  from Tenant to a
         third party and Tenant  continues to exist as a separate  entity,  both
         companies shall be jointly and severally  liable for the full terms and
         conditions of the Lease),  and provided that immediately  prior to such
         assignment said  corporation,  has a net worth equal to or greater than
         the net worth of Tenant  (a) at the time of Lease  execution  or (b) at
         the time of such assignment  (whichever is greater), or if it does not,
         Landlord  is  provided  a guaranty  of the Lease (in a form  reasonably
         acceptable to Landlord)  from a corporation  (a) that is the parent of,
         or is otherwise  affiliated  with, said corporation and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the  time  of  Lease  execution  or at the  time  of  such  assignment,
         (whichever is greater)."

         17.  DESTRUCTION:  Effective  as of the first  day of the Third  Option
Period, Lease Paragraph 62 ("Destruction")  shall be deleted in its entirety and
replaced with the following:

                  "62. DESTRUCTION: Paragraph 21 is modified by the following:

                  A.  Notwithstanding  anything to the contrary within Paragraph
         21,  Landlord  may  terminate  this Lease in the event of an  uninsured
         event or if insurance proceeds, net of the deductible, are insufficient
         to  cover  one  hundred  percent  of the  rebuilding  costs;  provided,
         however,  Tenant shall have the right to elect, in its  discretion,  to
         contribute such excess funds to permit Landlord to repair the Premises.

                  B. Except as  provided  in  Paragraph  62C,  Landlord  may not
         terminate  the Lease if the Premises are damaged by a peril whereby the
         cost to replace and/or repair is one hundred  percent (100%) covered by
         the insurance carried by Landlord pursuant to Paragraph 12, but instead
         shall restore the Premises in the manner described by Paragraph 21.

                  C. If the  Premises  are  damaged  by a peril  covered  by the
         insurance  carried by Landlord pursuant to Paragraph 12, Landlord shall
         have  the  option  to  terminate  the  Lease  if each of the  following
         conditions is satisfied:  (i) the cost to repair or the damage  exceeds
         thirty-three  percent  (33%)  of  the  then  replacement  cost  of  the
         Premises;  and (ii) the damage occurs at a time when there is less than
         five (5) years remaining in the term of the Lease.
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<PAGE>
                                                                       Quantum 2

                  D. If Landlord fails to obtain insurance as required  pursuant
         to Paragraph 12, and said insurance  would have been available to cover
         any damage or destruction  to the Premises,  Landlord shall be required
         to rebuild,  at its cost, net of the  deductible  which would have been
         required  under  said  insurance  policy  (which  deductible  Tenant is
         required to pay).

                  E. If the Premises  are damaged by any peril,  then as soon as
         reasonably practicable,  Landlord shall furnish Tenant with the written
         opinion of Landlord's  architect or construction  consultant as to when
         the  restoration  work  required of Landlord may be  completed.  Tenant
         shall have the option to  terminate  this Lease in the event any of the
         following  occurs,  which option may be  exercised  only by delivery to
         Landlord of a written notice of election to terminate  within seven (7)
         days after  Tenant  receives  from  Landlord  the  estimate of the time
         needed to complete such restoration:

                           (1) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors or invitees)  and, in the reasonable  opinion of Landlord's
         architect or  construction  consultant,  the  restoration of the Leased
         Premises cannot be  substantially  completed  within 180 days after the
         date of such damage (subject to force majeure conditions); or

                           (2) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors  or invitees)  within twelve (12) months of the last day of
         the Lease term, and, in the reasonable opinion of Landlord's  architect
         or  construction  consultant,  the  restoration of the Leased  Premises
         cannot be substantially completed within sixty (60) days after the date
         of such damage and Tenant has not  exercised  its Option to Extend said
         Term (or Extended Term as the case may be)."

        18.  LIABILITY  INSURANCE:  Effective  as of the  first day of the Third
Option Period, the first sentence of Lease Paragraph 10 ("Liability  Insurance")
shall be deleted and replaced with the following'  "Tenant, at Tenant's expense,
agrees to keep in force  during  the Term of this  Lease a policy of  commercial
general liability insurance with combined single limit coverage of not less than
Two Million Dollars  ($2,000,000)  per occurrence for bodily injury and property
damage occurring in, on or about the Premises,  including parking and landscaped
areas."

         19. LIMITATION OF LIABILITY: Effective as of the first day of the Third
Option Period,  Lease Paragraph 36 ("Limitation of Liability")  shall be deleted
in its entirety and replaced with the following:

                  "36.  LIMITATION OF LIABILITY In consideration of the benefits
         accruing hereunder,  Tenant and all successors and assigns covenant and
         agree that,  in the event of any actual or alleged  failure,  breach or
         default hereunder by Landlord:

         (i) the sole and exclusive remedy shall be against Landlord's  interest
         in the Premises leased herein;
         (ii) no  partner of  Landlord  shall be sued or named as a party in any
         suit or action  (except as may be necessary to secure  jurisdiction  of
         the partnership);
         (iii) no  service  of  process  shall be made  against  any  partner of
         Landlord  (except as may be  necessary  to secure  jurisdiction  of the
         partnership);
         (iv) no partner of Landlord  shall be  required to answer or  otherwise
         plead to any service of process;
         (v) no judgment will be taken against any partner of Landlord;
         (vi) any judgment  taken against any partner of Landlord may be vacated
         and set aside at any time without hearing;
         (vii) no writ of  execution  will ever be levied  against the assets of
         any partner of Landlord;
         (viii) these covenants and agreements are enforceable  both by Landlord
         and also by any partner of Landlord.
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<PAGE>
                                                                       Quantum 2

                  Tenant  agrees  that  each  of  the  foregoing  covenants  and
         agreements  shall be  applicable  to any covenant or  agreement  either
         expressly  contained  in this  Lease or imposed by statute or at common
         law."

        EXCEPT AS MODIFIED HEREIN, all other terms, covenants, and conditions of
said October 31, 1989 Lease Agreement shall remain in full force and effect.

        IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No.
3 to Lease as of the day and year last written below.

LANDLORD:                                   TENANT:

JOHN ARRILLAGA SURVIVOR'S TRUST             QUANTUM CORPORATION
                                            a Delaware corporation


By /s/ John Arrillaga, Trustee              By  /s/ Andrew Kryder
  ------------------------------                -------------------------------
John Arrillaga, Trustee
                                            Andrew Kryder
                                            -----------------------------------
Date:  6/30/97                              Print or Type Name
     ------------
                                            Title: FINANCE AND CORPORATE GENERAL
                                                   -----------------------------
                                                   COUNSEL
                                                   -----------------------------
RICHARD T. PEERY SEPARATE
PROPERTY TRUST                              Date:  June 25, 1997
                                                   ----------------
By /s/ Richard T. Peery
   ----------------------
Richard T. Peery, Trustee

Date: 6/26/97
      -------------------

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<PAGE>

                                                                       Quantum 1

                                AMENDMENT NO. 3
                                    TO LEASE

         THIS  AMENDMENT  NO. 3 is made and entered into this 16th day of April,
1997, by and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated
7/20/77  (JOHN  ARRILLAGA  SURVIVOR'S  TRUST)  (previously  known  as the  "John
Arrillaga Separate Property Trust") as amended,  and RICHARD T. PEERY,  Trustee,
or his Successor  Trustee UTA dated 7/20/77 (RICHARD T. PEERY SEPARATE  PROPERTY
TRUST) as amended, collectively as LANDLORD, and QUANTUM CORPORATION, a Delaware
corporation, as TENANT.

                                    RECITALS

         A. WHEREAS,  by Lease  Agreement dated October 31, 1989 Landlord leased
to Tenant all of that certain  155,734+/-  square foot building  located at 1140
Technology  Drive,  Milpitas,   California,   the  details  of  which  are  more
particularly set forth in said October 31, 1989 Lease Agreement, and

         B. WHEREAS,  said Lease was amended by Letter  Agreement  dated October
31, 1989 which provided for a Basic Rent Credit for the period  commencing  with
the Lease Commencement Date and ending on May 31, 1991, and

         C.  WHEREAS,  said Lease was amended by Amendment No. 1 dated April 24,
1990 which  canceled the reduction in Basic Rent Credit Letter dated October 31,
1989,  and which delayed the Lease  Commencement  Date from December 15, 1990 to
April 1, 1991, and,

         D.  WHEREAS,  said Lease was amended by the  Commencement  Letter dated
March 4, 1991 which  changed  the  Commencement  Date of the Lease from April 1,
1991 to March 1, 1991, and established  the  Termination  Date of July 31, 2006,
and,

         E.  WHEREAS,  said Lease was amended by Amendment  No. 2 dated June 26,
1991 which  extended the Term of the Lease for an  additional  two month period,
amended the Basic Rent schedule and Aggregate Rent accordingly,  and amended the
deadlines in which Tenant could exercise its Option to Extend  pursuant to Lease
Paragraphs 42 and 43, and

         F.  WHEREAS,  it is now the desire of the  parties  hereto to amend the
Lease by (i) extending the Term for five years,  changing the  Termination  Date
from  September  30, 2006 to September  30, 2011,  (ii)  amending the Basic Rent
schedule and Aggregate Rent  accordingly,  (iii) adding a third Five Year Option
to Extend,  (iv) replacing  Paragraphs 41C ("Lease Terms  Co-extensive")  and 48
("Cross  Default") and 53  ("Structural  Capital Costs Regulated by Governmental
Agencies After thee  Commencement of this Lease not Caused by Tenant or Tenant's
Uses or Remodeling of the Premises"), (v) amending Lease Paragraph 12 ("Property
Insurance") and (vi) amending and/or replacing  certain  provisions of the Lease
commencing as of the  commencement  of the Third  Extended Term of said Lease as
hereinafter set forth.

                                   AGREEMENT

         NOW THEREFORE,  for valuable consideration,  receipt of which is hereby
acknowledged,  and in  consideration  of the hereinafter  mutual  promises,  the
parties hereto do agree as follows:

         1. TERM OF LEASE:  It is agreed  between  the  parties  that Tenant has
exercised  its First  Five-Year  Option to Extend the lease term of that certain
lease agreement  dated March 23, 1994 for premises  located at 1101 Sumac Drive,
Milpitas,  California  (the "Building 5 Lease"),  as detailed in Paragraph 41 of
said Building 5 Lease.  Paragraph 40C of said Building 5 Lease  provides that in
the  event  the  term of  said  Building  5 Lease  is  extended  for any  reason
whatsoever,  the terms of the  Existing  Leases  (i.e.  two of said leases dated
October  31,  1989 are for  Premises  located at 1140  Technology  Drive and 500
McCarthy Blvd.,  Milpitas,  California  (the "1989 Leases");  one of said leases
dated September 17, 1990 is for Premises located at 1000 Sumac Drive,  Milpitas,
California,

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                                     Page 1
<PAGE>

                                                                       Quantum 1

and one of said leases dated April 10, 1992 is for Premises located at 900 Sumac
Drive,  Milpitas,  California)  shall also be  extended  so that all five Leases
expire on the same date;  therefore,  it is agreed  between the parties  that by
exercising  its  Option to Extend  the  Building  5 Lease,  Tenant has in effect
exercised its Option to Extend under Lease Paragraph 42 ("First Five-Year Option
to  Extend"),  and that  pursuant to said Lease  Paragraph  42, the Term of this
Lease Agreement  shall be extended for an additional  five (5) year period,  and
the Lease Termination Date shall be changed from September 30, 2006 to September
30, 2011.

         2. BASIC RENTAL FOR FIRST  EXTENDED  TERM OF LEASE:  The monthly  Basic
Rental for the First Extended Term of Lease shall be as follows:

         On October 1, 2006,  the sum of TWO HUNDRED  SEVENTY TWO THOUSAND  FIVE
HUNDRED  THIRTY FOUR AND 50/100 DOLLARS  ($272,534.50)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September 1, 2007.

         On  October 1,  2007,  the sum of TWO  HUNDRED  EIGHTY  THOUSAND  THREE
HUNDRED TWENTY ONE AND 20/100 DOLLARS ($280,321.20) shall be due, and a like sum
due on the first day of each month thereafter through and including September 1,
2008.

         On October 1, 2008,  the sum of TWO HUNDRED  EIGHTY EIGHT  THOUSAND ONE
HUNDRED SEVEN AND 90/100 DOLLARS  ($288,107.90) shall be due, and a like sum due
on the first day of each month  thereafter  through and  including  September 1,
2009.

         On October 1, 2009,  the sum of TWO HUNDRED  NINETY FIVE THOUSAND EIGHT
HUNDRED  NINETY FOUR AND 60/100 DOLLARS  ($295,894.60)  shall be due, and a like
sum  due on the  first  day of  each  month  thereafter  through  and  including
September 1, 2010.

         On October 1, 2010, the sum of THREE HUNDRED THREE THOUSAND SIX HUNDRED
EIGHTY ONE AND 30/100 DOLLARS  ($303,681.30) shall be due, and a like sum due on
the first day of each month thereafter through and including September 1, 2011.

         The  Aggregate   Basic  Rent  for  the  Lease  shall  be  increased  by
$17,286,474.00 or from $39,587,582.80 to $56,874,056.80.

         3. THIRD FIVE-YEAR  OPTION TO EXTEND:  Provided Tenant has extended the
Lease for an  additional  five (5) year period  pursuant to Lease  Paragraph  43
("Second Five Year Option To Extend"),  Landlord hereby grants to Tenant a third
option to extend the Term of this Lease for an  additional  five (5) year period
upon the following terms and conditions:

         A. Tenant shall give Landlord  written  notice of Tenant's  exercise of
this  option to  extend at least one  hundred  eighty  (180)  days  prior to the
expiration of the Lease Term as extended pursuant to Lease Paragraph 43 ("Second
Five Year  Option To  Extend"),  in which  event the Lease  shall be  considered
extended  for an  additional  five (5) year  period  upon  the  same  terms  and
conditions as this Lease,  absent this  Paragraph 3 and subject to the Rental as
set forth  below.  In the event that Tenant  fails to timely  exercise  Tenant's
option as set forth herein in writing,  Tenant  shall have no further  option to
extend this Lease or the Other  Leases,  and this Lease  shall  continue in full
force and effect for the full remaining term hereof, absent this Paragraph 3.

         B. The monthly  Basic Rent for the option period shall be as follows in
the event the option is

               Period                               Monthly Basic Rent
               ------                               ------------------
               
               Months 1-12                              $2.25/sf
               Months 13-24                             $2.30/sf
               Months 25-36                             $2.35/sf
               Months 37-48                             $2.40/sf
               Months 49-60                             $2.45/sf

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                                                                 Initial: ALK
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                                     Page 2
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                                                                       Quantum 1

         C. Notwithstanding  anything contained herein,  Tenant may not exercise
the option to extend  granted by this  Paragraph 3 at any time that Tenant is in
default  (default for monetary and  material  default for  non-monetary)  of its
obligations  under  this  Lease,  if Tenant has  received  written  notice  from
Landlord  that Tenant is in default,  and such default has not been timely cured
within the time period provided for in this Lease;  provided,  however,  that if
such  default  of Tenant is not for money  due under  this  Lease and  cannot be
cured,  and if Landlord  does not elect to  terminate  this Lease as a result of
such  non-curable  default by Tenant,  Tenant may  exercise the option to extend
granted by this Paragraph 3 notwithstanding such non-curable default.

         4.  LEASE  TERMS  CO-EXTENSIVE:   Lease  Paragraph  40C  ("Lease  Terms
Co-extensive")  is  hereby  deleted  in  its  entirety  and  replaced  with  the
following:

                  "40C. LEASE TERMS  CO-EXTENSIVE:  It is acknowledged  that (i)
         Landlord and Tenant have  previously  executed four separate  leases in
         addition to this Lease:  one of said leases  dated  October 31, 1989 is
         for Premises located at 500 McCarthy Blvd.,  Milpitas,  California (the
         "Building Two Lease");  one of said leases dated  September 17, 1990 is
         for Premises  located at 1000 Sumac Drive,  Milpitas,  California  (the
         "Building Four Lease");  one of said leases dated April 10, 1992 is for
         Premises  located  at  900  Sumac  Drive,  Milpitas,   California  (the
         "Building 3 Lease"); and one of said leases dated March 23, 1994 is for
         premises  located  at  1101  Sumac  Drive,  Milpitas,  California  (the
         "Building 5 Lease") (hereinafter collectively referred to as the "Other
         Leases");  and (ii) it is the intention of the parties that the term of
         this Lease be co-extensive with the term of the Other Leases, such that
         the terms of all five leases  ("the  Leases")  expire on the same date.
         The provisions of this Paragraph 40C also requires the terms of all the
         Leases to be extended  accordingly  if Tenant  exercises  its Option to
         Extend  under any of the  Leases.  The  monthly  Basic Rent  during the
         extended  term under each of the Leases  shall be increased by $.05 per
         square  foot  on  the  commencement  date  of  the  extended  term  and
         thereafter  on each and every  anniversary  of the  respective  lease's
         commencement date of the extended term."

         5.  CROSS  DEFAULT:  Lease  Paragraph  48 ("Cross  Default")  is hereby
deleted in its entirety and replaced with the following:

                  "48. CROSS DEFAULT:  It is agreed between  Landlord and Tenant
         that a default  under this Lease,  or a default  under any of the Other
         Leases may, at the option of Landlord,  be  considered a default  under
         all Leases,  in which event Landlord shall be entitled (but in no event
         required) to apply all rights and remedies of Landlord  under the terms
         of one lease to all the Leases including, but not limited to, the right
         to  terminate  any or all of the  aforementioned  Other  Leases or this
         Lease by reason of a default under the Leases or hereunder.

                  Notwithstanding  the above,  Landlord shall have the option of
         considering  a default  under this Lease or a default  under any of the
         Other Leases to be a default  under all such leases,  only with respect
         to such leases under which  Landlord is also the 'Landlord' at the time
         such  default  occurs.  By way of example,  if at the time a default of
         Tenant  occurs  under  this  Lease,  Landlord  has  sold  the  premises
         described  in any of the Other  Leases and is no longer the  'Landlord'
         thereunder,  then a default  under this Lease  shall not  constitute  a
         default under any of such Other Leases so sold by Landlord  (unless the
         premises  leased  under this Lease and the Other Leases are sold to the
         same entity), and a default by Tenant under any of such Other Leases so
         sold by Landlord shall not constitute a default under this Lease or any
         other of the Other Leases then remaining  between  Landlord and Tenant.
         However,  if the Landlord  under this Lease and the Other Leases is one
         in the same at the time of said default,  said cross default provisions
         shall apply."

         6. STRUCTURAL  CAPITAL COSTS  REGULATED BY GOVERNMENTAL  AGENCIES AFTER
THE  COMMENCEMENT  OF THIS  LEASE  NOT  CAUSED BY  TENANT  OR  TENANT'S  USES OR
REMODELING  OF THE  PREMISES: Lease  Paragraph 53  ("Structural  Capital  Costs
Regulated by  Governmental  Agencies  after the  Commencement  of this Lease Not
Caused by Tenant or

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                                                                       Quantum 1

Tenant's  Uses or Remodeling  of the  Premises") is hereby  deleted and replaced
with the following:

                  "53.   STRUCTURAL  CAPITAL  COSTS  REGULATED  BY  GOVERNMENTAL
         AGENCIES AFTER THE  COMMENCEMENT  OF THIS LEASE NOT CAUSED BY TENANT OR
         TENANT'S USES OR REMODELING  OF THE  PREMISES:  The  provisions of this
         Paragraph 53 shall modify Paragraphs 7 and 14:

                  A. If (i) during the last five (5) years of the First Extended
         Term of the Lease if said Lease has not been  extended as provided  for
         in Lease  Paragraph  43  ("Second  Five Year  Option To  Extend") or in
         Paragraph 3 ("Third Five Year Option to Extend") or Paragraph 4 ("Lease
         Terms Co-Extensive")  above, or (ii) during either of the five (5) year
         extension  periods  permitted by Lease  Paragraph 43 or Paragraph 3, or
         Paragraph  4  above,  it  becomes  necessary  (due to any  governmental
         requirement for continued occupancy of the Premises) to make structural
         improvements  required by laws enacted or legal requirements imposed by
         governmental  agency(s) after the  Commencement  Date, and the cost for
         each required work or improvements exceeds $100,000, then if such legal
         requirement  is not  imposed  because of Tenant's  specific  use of the
         Premises and is not  "triggered"  by Tenant's  Alterations  or Tenant's
         application  for a building permit or any other  governmental  approval
         (collectively  "Tenant's  Actions") in which  instance  Tenant shall be
         responsible  for 100% of the cost of such improvements,  Landlord shall
         be responsible for paying the cost of such improvement and constructing
         such  improvement,  subject  to a cash  contribution  from  Tenant of a
         portion of the cost thereof as provided for and calculated in Paragraph
         53B.

                  B. When Landlord  makes an  improvement  pursuant to Paragraph
         53A,  and as a condition to  Landlord's  obligation  to construct  such
         improvement,  Tenant shall make the following  contribution  in cash to
         Landlord for the cost thereof prior to the  commencement of the work by
         Landlord.  It is agreed that Tenant  shall pay to Landlord  100% of the
         cost of the  first  $100,000.00  worth of each  improvement.  After the
         first  $100,000.00,  all costs above $100,000.00 shall be divided by 15
         and  multiplied by the time period  remaining in the last five years of
         the Lease Term from the date work on such improvement commences.

                  For example, if the improvement is not required as a result of
         Tenant's  Actions and if the cost of such  improvement was $400,000 and
         there was one year and six months  remaining in the Lease term when the
         work  commenced,  then  Tenant  would be  responsible  for  reimbursing
         Landlord in cash $130,000.00 computed as follows:

              Total Cost of Work                             $400,000.00      
              Tenant Responsible for                                         
              1st $100,000                                   -100,000.00      
                                                              ----------      
              Total Amount To Be Amortized                   $300,000.00      
                                                  
             
              $300,000.00/15 = $20,000.00/yr. x 1.5 yrs =    $ 30,000.00
             
              Tenant responsible for $100,000 + $30,000.00 = $130,000.00
         
                  C. If Landlord  has made  improvements,  for which  Tenant has
         reimbursed Landlord for the cost thereof pursuant to Paragraph 53B, and
         the  term  of this  Lease  is  subsequently  extended  pursuant  to the
         exercise by Tenant of an option to renew pursuant to Lease Paragraph 43
         or  Paragraph 3 above,  upon the exercise of any such option by Tenant,
         Tenant  shall  pay to  Landlord  an  additional  sum equal to the total
         amount  of said  improvement  less the  amount  previously  paid for by
         Tenant.  Using the example in  Paragraph  53B above,  Tenant  would owe
         Landlord  the   additional   amount  of   $270,000.00   ($400,000.00  -
         $130,000.00 = $270,000.00)."

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<PAGE>

                                                                       Quantum 1

         7. PROPERTY  INSURANCE:  Lease  Paragraph 12 ("Property  Insurance") is
hereby amended to include the following:  "Tenant  acknowledges  that as part of
the cost of insurance  policies for the Premises,  Tenant is responsible for the
payment of  insurance  deductibles  on  insurance  claims as they  relate to the
Premises  subject to the  limitations  provided in Lease Paragraph 55 ("Property
Insurance")  which limitations are applicable only during the initial Lease Term
and the First Lease Extension Period and the Second Lease Extension Period. Said
limitation  provided  for  in  Lease  Paragraph  55 are  null  and  void  at the
commencement of the "Third Lease Extended Term".

         8. THIRD OPTION PERIOD - LEASE PROVISION  CHANGES:  In the event Tenant
exercises  its Third Option to Extend as provided for in Paragraph 3 above,  the
following amendments  (contained within Paragraphs 9 through 19) are herein made
to the Lease to be effective  upon the  commencement  of the third option period
("Third Option  Period"),  or during any period  following the expiration of the
Lease  Term or  expiration  of the Lease  when  Tenant is in  possession  of the
Premises.

         9. LATE  CHARGE:  Effective  as of the  first  day of the Third  Option
Period,  the Late Charge referenced in Lease Paragraph 4.D ("Late Charge") shall
be changed from five percent (5%) to ten percent (10%),  and Lease  Paragraph 50
("Limitation on Late Charge") shall be deleted in its entirety and of no further
force or effect.

         10.  MANAGEMENT  FEE:  Notwithstanding  anything to the contrary in the
Lease,  effective  as of the first day of the Third  Option  Period,  and on the
first day of each month thereafter, Tenant shall pay to Landlord, in addition to
the Basic Rent and Additional Rent, a fixed monthly  management fee ("Management
Fee") equal to one percent  (1%) of the Basic Rent due for each month during the
Lease Term.

         11.  HAZARDOUS  MATERIALS:  Effective  as of the first day of the Third
Option Period,  Lease Paragraph 45 ("Hazardous  Materials")  shall be deleted in
its entirety and replaced with the following:

                  "45. HAZARDOUS MATERIALS: Landlord and Tenant agree as follows
         with  respect to the  existence  or use of  "Hazardous  Materials"  (as
         defined  herein) on, in, under or about the Premises and real  property
         located beneath said Premises, which includes the entire parcel of land
         on which the Premises are located as shown in Green on Exhibit A to the
         Lease (hereinafter collectively referred to as the "Property"):

                  A. As used herein,  the term "Hazardous  Materials" shall mean
         any  material,  waste,  chemical,  mixture  or  byproduct  which  is or
         hereafter is defined,  listed or designated  under  Environmental  Laws
         (defined below) as a pollutant,  or as a contaminant,  or as a toxic or
         hazardous  substance,  waste or  material,  or any  other  unwholesome,
         hazardous,   toxic,  biohazardous,   or  radioactive  material,  waste,
         chemical,  mixture  or  byproduct,  or which is  listed,  regulated  or
         restricted by any  Environmental  Law (including,  without  limitation,
         petroleum  hydrocarbons  or any distillates or derivatives or fractions
         thereof,  polychlorinated  biphenyls, or asbestos). As used herein, the
         term "Environmental  Laws" shall mean any applicable Federal,  State of
         California or local  government  law (including  common law),  statute,
         regulation,  rule,  ordinance,  permit,  license,  order,  requirement,
         agreement, or approval, or any determination,  judgment,  directive, or
         order of any  executive or judicial  authority at any level of Federal,
         State of  California  or local  government  (whether  now  existing  or
         subsequently  adopted or  promulgated)  relating  to  pollution  or the
         protection of the environment,  ecology,  natural resources,  or public
         health and safety.

                  B. Tenant shall notify Landlord prior to the occurrence of any
         Tenant's  Hazardous  Materials  Activities  (defined  below).  Landlord
         acknowledges  that Tenant  shall use,  in  compliance  with  applicable
         Environmental  Laws,  customary  household and office supplies  (Tenant
         shall first provide  Landlord with a list of said materials  use), such
         as mild cleaners,  lubricants and copier toner. Any and all of Tenant's
         Hazardous  Materials  Activities  shall be conducted in conformity with
         this Paragraph

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<PAGE>

                                                                       Quantum 1

45,  Paragraph 14 of this Lease, and in compliance with all  Environmental  Laws
and  regulations.  As  used  herein,  the  term  "Tenant's  Hazardous  Materials
Activities" shall mean any and all use, handling, generation, storage, disposal,
treatment,  transportation,  release,  discharge,  or emission of any  Hazardous
Materials on, in,  beneath,  to, from,  at or about the Property,  in connection
with  Tenant's use of the Property,  or by Tenant or by any of Tenant's  agents,
employees,  contractors, vendors, invitees, visitors or its future subtenants or
assignees  or other  third  parties  (including  "dumping"  by others) (or which
Hazardous  Materials  originate  on the surface of the  Premises  any time on or
after the Commencement Date of this Lease, but excluding  Hazardous Materials on
the Premises prior to the Lease  Commencement Date because of the storage,  use,
disposal,  or  transportation  of such  materials or waste by any of  Landlord's
contractors or otherwise  arising out of construction work performed by or under
the direction of Landlord on the Premises and Landlord shall be responsible  for
all required actions with respect to such materials or wastes). Tenant agrees to
provide Landlord with prompt written notice of any spill or release of Hazardous
Materials at the Property  during the term of the Lease of which Tenant  becomes
aware,  and further agrees to provide Landlord with prompt written notice of any
violation of Environmental Laws in connection with Tenant's Hazardous  Materials
Activities  of which  Tenant  becomes  aware.  If Tenant's  Hazardous  Materials
Activities  involve  Hazardous  Materials  other than  normal  use of  customary
household and office supplies,  Tenant also agrees at Tenant's  expense:  (i) to
install such Hazardous Materials monitoring,  storage and containment devices as
may be required by Environmental  Laws,  regulations and/or governing  agencies;
(ii) to provide Landlord with a written  inventory of such Hazardous  Materials,
including  an  update  of  same  each  year  upon  the  anniversary  date of the
Commencement  Date  of  the  Lease  ("Anniversary  Date");  and  (iii)  on  each
Anniversary Date to provide to Landlord copies of all documentation and records,
required by  applicable  Environmental  Laws to be  prepared  and  submitted  to
governmental authorities, relating to use at the Property of Hazardous Materials
or to Tenant's  Hazardous  Materials  Activities,  if any. If upon completion of
Landlord's  review  of  said  documentation  and  records,  Landlord  reasonably
questions if Tenant is in compliance with all applicable Environmental Laws with
respect to Tenant's Hazardous Materials Activities,  Tenant agrees within thirty
(30) days  following  receipt  of  written  notice  from  Landlord,  to retain a
qualified environmental consultant,  acceptable to Landlord, to evaluate whether
Tenant is in compliance with all applicable  Environmental  Laws with respect to
Tenant's Hazardous Materials Activities. Tenant, at its expense, shall submit to
Landlord  a report  from  such  environmental  consultant  which  discusses  the
environmental  consultant's  findings within two (2) months of each  Anniversary
Date. Tenant, at its expense,  shall promptly undertake and complete any and all
steps necessary,  and in full compliance with applicable  Environmental Laws, to
fully  correct  any  and  all  problems  or   deficiencies   identified  by  the
environmental  consultant,  and promptly provide Landlord with  documentation of
all such corrections.

                  C. Prior to termination or expiration of the Lease, Tenant, at
         its expense,  shall (i) properly remove from the Property all Hazardous
         Materials  which come to be located at the Property in connection  with
         Tenant's Hazardous Materials Activities, and (ii) fully comply with and
         complete all facility closure requirements of applicable  Environmental
         Laws regarding Tenant's Hazardous Materials  Activities,  including but
         not limited to (x) properly restoring and repairing the Property to the
         extent damaged by such closure  activities,  and (y) obtaining from the
         local Fire Department or other appropriate  governmental authority with
         any legal or regulatory jurisdiction a written concurrence that closure
         has been completed in compliance  with applicable  Environmental  Laws.
         Tenant  shall  promptly  provide  Landlord  with  copies of any claims,
         notices,  work plans, data and reports prepared,  received or submitted
         in connection with any such closure activities.

                  D. If Landlord,  upon  consultation  with  Tenant,  reasonably
         concludes  that the  Property  has become  contaminated  as a result of
         Tenant's Hazardous  Materials  Activities,  Landlord in addition to any
         other rights it may have under this Lease or under  Environmental  Laws
         or other laws,  may enter upon the  Property  and  conduct  inspection,
         sampling  and  analysis,  including  but not limited to  obtaining  and
         analyzing  samples  of  soil  and  groundwater,   for  the  purpose  of
         determining the nature and extent

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<PAGE>
                                                                       Quantum 1

         of such contamination  except to the extent that such activities may be
         inconsistent with Tenant's  compliance with Environmental  Laws. Tenant
         shall   promptly   reimburse   Landlord   for  the  costs  of  such  an
         investigation,  including but not limited to reasonable attorneys' fees
         Landlord incurs with respect to such  investigation to the extent,  and
         only  to  the  extent,  that  it  that  discloses  Hazardous  Materials
         contamination  for which Tenant is liable  under this Lease.  Except as
         may be  required of Tenant by  applicable  Environmental  Laws,  Tenant
         shall not perform any  sampling,  testing,  or drilling to identify the
         presence of any Hazardous Materials at the Property, without Landlord's
         prior written consent which shall not be unreasonably withheld.  Tenant
         shall  promptly  provide  Landlord with copies of any claims,  notices,
         work  plans,  data and  reports  prepared,  received  or  submitted  in
         connection with any sampling, testing or drilling performed pursuant to
         the preceding sentence.

                  E.  Tenant  shall   indemnify,   defend  (with  legal  counsel
         acceptable  to  Landlord,  whose  consent  shall  not  unreasonably  be
         withheld)  and  hold  harmless   Landlord,   its  employees,   assigns,
         successors, successors-in-interest, agents and representatives from and
         against  any and all claims  (including  but not limited to third party
         claims from a private  party or a government  authority),  liabilities,
         obligations,   losses,   causes  of   action,   demands,   governmental
         proceedings or directives, fines, penalties, expenses, costs (including
         but not  limited  to  reasonable  attorneys',  consultants'  and  other
         experts' fees and costs),  and damages,  which arise from or relate to:
         (i)  Tenant's  Hazardous  Materials  Activities;   (ii)  any  Hazardous
         Materials contamination caused by Tenant prior to the Commencement Date
         of the Lease;  or (iii) the breach of any  obligation  of Tenant  under
         this    Paragraph    45    (collectively,    "Tenant's    Environmental
         Indemnification"). Tenant's Environmental Indemnification shall include
         but is not limited to the  obligation  to promptly and fully  reimburse
         Landlord for losses in or reductions to rental  income,  and diminution
         in  fair  market  value  of  the   Property.   Tenant's   Environmental
         Indemnification  shall  further  include  but  is  not  limited  to the
         obligation  to  diligently  and properly  implement to  completion,  at
         Tenant's  expense,  any and all environmental  investigation,  removal,
         remediation,   monitoring,  reporting,  closure  activities,  or  other
         environmental   response  action  as  may  be  required  by  applicable
         Environmental  Laws,  regulations or governing agencies  (collectively,
         "Response Actions"). Tenant shall promptly provide Landlord with copies
         of any claims, notices, work plans, data and reports prepared, received
         or submitted in connection with any Response Actions.

                  F.  Landlord  hereby makes the  following  representations  to
         Tenant, each of which is made only to the best of Landlord's  knowledge
         as of the date  Landlord  executes  this Lease,  without any inquiry or
         investigation  having been made or required by Landlord  regarding this
         subject,  nor does Landlord have any  obligation to investigate or make
         inquiry regarding the subject:

                           (1)  The  soil  and  ground  water  on or  under  the
         Premises does not contain Hazardous  Materials in amounts which violate
         any laws to the  extent  that any  governmental  entity  could  require
         either  Landlord or Tenant to take any remedial  action with respect to
         such Hazardous Materials.

                           (2)  During  the time  that  Landlord  has  owned the
         Premises,  Landlord  has  received no notice of (i) any  violation,  or
         alleged  violation,  of any law  that  has not  been  corrected  to the
         satisfaction  of the  appropriate  authority,  (ii) any pending  claims
         relating to the  presence of  Hazardous  Material on the  Premises,  or
         (iii) any pending  investigation by any governmental  agency concerning
         the Premises relating to Hazardous Materials.

                  G.  Landlord and Tenant shall each give written  notice to the
         other  as  soon as  reasonably  practicable  of (i)  any  communication
         received from any governmental authority concerning Hazardous Materials
         which  relates  to the  Premises,  and  (ii) any  contamination  of the
         Premises by  Hazardous  Materials which  constitutes a violation of any
         law.  Attached  as  Exhibit  "C' to the  Lease  is a list of  Hazardous
         Materials  that Tenant  intends to use at the  Premises.  If during the
         Lease Term Tenant  proposes  to use other  Hazardous  Materials  at the
         Premises,  Tenant shall inform  Landlord of such use,  identifying  the
         Hazardous Materials and the manner of their use, storage and

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                                     Page 7
<PAGE>

                                                                       Quantum 1

         disposal,  and  shall  agree  (i) to use,  store  and  dispose  of such
         Hazardous  Materials strictly in compliance with all laws,  regulations
         and  governing  agencies  and (ii)  that  the  indemnity  set  forth in
         Paragraph  45 shall  be applicable  to Tenant's  use of such  Hazardous
         Material.

                  H. Landlord or Tenant may, at any time, cause testing wells to
         be  installed  on the  Premises,  and may cause the ground  water to be
         tested to detect the presence of Hazardous  Material by the use of such
         tests as are then  customarily  used for such  purposes.  Testing wells
         installed by Tenant shall be paid for by Tenant.  If tests conducted by
         Landlord  disclose  that Tenant has  violated any  Hazardous  Materials
         laws,  or Tenant or parties   on the  Premises  during the Term of this
         Lease  have  contaminated  the  Premises as  determined  by  regulatory
         agencies  pursuant  to  Hazardous  Materials  laws,  or that Tenant has
         liability to Landlord  pursuant to Paragraph 45A, then Tenant shall pay
         for 100 percent of the cost of the test and all related expense.  Prior
         to the  expiration  of the Lease Term,  Tenant shall remove any testing
         wells it has installed at the Premises,  and return the Premises to the
         condition  existing  prior to the  installation  of such wells,  unless
         Landlord  requests  in  writing  that  Tenant  leave all or some of the
         testing  wells in which  instance the wells  requested to be left shall
         not be removed.

                  I. If any tests  performed by Tenant or Landlord  prior to the
         Commencement  Date  disclose  Hazardous   Materials  at  the  Premises,
         Landlord  at its  expense  will  promptly  take all  reasonable  action
         required  by law  with  respect  to the  existence  of  such  Hazardous
         Materials at the Premises.  The Commencement  Date shall not be delayed
         because of such action by Landlord unless occupation of the Premises is
         prohibited by law.

                  J. The obligations of Landlord and Tenant under this Paragraph
         45 shall survive the  expiration or earlier  termination of the Term of
         this Lease.  The rights and  obligations  of  Landlord  and Tenant with
         respect to issues  relating  to  Hazardous  Materials  are  exclusively
         established by this Paragraph 45."

         12. SECURITY DEPOSIT: Effective as of the first day of the Third Option
Period, Lease Paragraph 51 ("Security Deposit") shall be deleted in its entirety
and replaced with the following:

                  "51. SECURITY DEPOSIT:  The following  provisions shall modify
         Lease Paragraph 4F:

                  A.  Within  thirty (30) days after the  expiration  or earlier
         termination  of the  Lease  term  and  after  Tenant  has  vacated  the
         Premises,  Landlord shall return to Tenant the entire Security  Deposit
         except for amounts that Landlord has deducted therefrom that are needed
         by Landlord to cure  defaults of Tenant  under the Lease or  compensate
         Landlord for damages for which Tenant is liable pursuant to this Lease.
         The use or disposition of the Security  Deposit shall be subject to the
         provisions of California Civil Code Section 1950.7.

                  B.  During  the  first  thirty  (30) days  following  Tenant's
         exercise of its Third Option to Extend, and only during said thirty day
         period,  Tenant  shall  have the  one-time  option  of  satisfying  its
         obligation   with  respect  to  an  amount  equal  to  one-half   (1/2)
         ($210,240.90) of the $420,481.80  Security Deposit required under Lease
         Paragraph 4F by providing to Landlord,  at Tenant's sole cost, a letter
         of credit which: (i) is drawn upon an institutional  lender  reasonably
         acceptable  and  accessible to Landlord in form and content  reasonably
         satisfactory  to Landlord;  (ii) is in the amount of one-half  (1/2) of
         the  Security  Deposit;  (iii)  is for a term of at least  twelve  (12)
         months;  (iv) with respect to any letter of credit in effect within the
         six month period immediately prior to the expiration of the Lease term,
         shall  provide  that the term of such letter of credit  shall extend at
         least forty five (45) days past the Lease  expiration  date  (including
         any  extensions  thereof);  and (v) may be drawn upon by Landlord  upon
         submission of a  declaration  of Landlord that Tenant is in default (as
         defined in  Paragraph  19 and as modified by  Paragraph  60).  Landlord
         shall  not  be   obligated   to  furnish   proof  of  default  to  such
         institutional lender, and Landlord shall only be required to give the

                                                                          JA
                                                                 Initial: ALK
                                                                          ---
                                     Page 8
<PAGE>

                                                                       Quantum 1

         institutional lender written notification that Tenant is in default and
         upon   receiving   such   written   notification   from   Landlord  the
         institutional  lender shall be obligated to immediately deliver cash to
         Landlord equal to the amount Landlord may spend or become  obligated to
         spend by reason of Tenant's  default or to compensate  Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's  default
         up to 1/2 of the total Security  Deposit required under Lease Paragraph
         4F. Said letter of credit shall provide that if the letter of credit is
         not renewed,  replaced or extended within twenty (20) days prior to its
         expiration  date the issuer of the credit shall  automatically  issue a
         cashiers  check  payable  to  Landlord  in the  amount of the letter of
         credit  after the date which is twenty (20) days before the  expiration
         date, and no later than the  expiration  date,  without  Landlord being
         required to make demand upon the letter of credit.  If Tenant  provides
         Landlord  with a letter  of  credit,  within  thirty  (30)  days of the
         execution of this Lease, meeting the foregoing  requirements,  one-half
         (1/2)  of  the  cash  Security   Deposit  (i.e.,   $210,240.90  of  the
         $420,481.80  Security  Deposit) shall be returned to Tenant by Landlord
         inasmuch as the cash deposit  remaining  and the Letter of Credit equal
         the total Security  Deposit  required in Lease  Paragraph 4F. If Tenant
         defaults with respect to any  provisions  of this Lease,  including but
         not limited to provisions relating to the payment of Rent, Landlord may
         (but  shall not be  required  to) draw down on the letter of credit for
         payment  of any sum which  Landlord  may spend or become  obligated  to
         spend by reason of Tenant's default,  or to compensate Landlord for any
         loss or damage which Landlord may suffer by reason of Tenant's default.
         Landlord  and Tenant  acknowledge  that such  letter of credit  will be
         treated  as if it were a cash  security  deposit,  and such  letter  of
         credit may be drawn down upon by Landlord upon demand and  presentation
         of  evidence of the  identity  of Landlord to the issuer,  in the event
         that Tenant  defaults  with respect to any  provision of this Lease and
         such  default  is  not  cured  within  any   applicable   cure  period.
         Notwithstanding  anything to the contrary in this Lease, Landlord shall
         not be  obligated  to furnish  proof of  default to such  institutional
         lender and Landlord is only required to give the  institutional  lender
         written  notification that Tenant is in default and upon receiving such
         written  notification from Landlord the  institutional  lender shall be
         obligated to  immediately  deliver cash to Landlord equal to the amount
         Landlord  may spend or become  obligated to spend by reason of Tenant's
         default,  or to  compensate  Landlord  for  any  loss or  damage  which
         Landlord  may  suffer by reason of  Tenant's  default  up to 1/2 of the
         total Security Deposit.  Landlord  acknowledges that it is not entitled
         to draw down such  letter of credit  unless  Landlord  would  have been
         entitled to draw upon the cash   security deposit pursuant to the terms
         of  Paragraph  4F of the Lease.  Concurrently  with the delivery of the
         required  information  to the issuer,  Landlord shall deliver to Tenant
         written  evidence  of the  default  upon which the draw down was based,
         together with evidence that Landlord has provided to Tenant the written
         notice  of  such  default  which  was  required  under  the  applicable
         provision  of the Lease,  and evidence of the failure of Tenant to cure
         such default within the applicable  grace period  following  receipt of
         such notice of default.  Any  proceeds  received by Landlord by drawing
         upon the  letter of credit  shall be  applied  in  accordance  with the
         provisions governing the Security Deposit imposed by Lease Paragraph 4F
         and this  Paragraph  51. If  Landlord  draws upon the letter of credit,
         thereafter  Tenant  shall once again have the right to post a letter of
         credit in place of one-half (1/2) of a cash Security Deposit so long as
         Tenant is not then in default. In any event Tenant will be obligated to
         replenish  the amount  drawn to restore   the  Security  Deposit to its
         original  amount as provided for in Paragraph 4F. If any portion of the
         letter of credit is used or  applied  pursuant  hereto,  Tenant  shall,
         within ten (10) days after  receipt of a written  demand  therefor from
         Landlord,  restore and replace the value of such security by either (i)
         depositing cash with Landlord in the amount equal to the sum drawn down
         under the letter of credit,  or (ii) increasing the letter of credit to
         its value immediately  prior to such  application.  Tenant's failure to
         replace the value of the security as provided in the preceding sentence
         shall be a material breach of its obligation under this Lease."

         13.  REAL  ESTATE  TAXES:  Effective  as of the  first day of the Third
Option Period,  Lease Paragraph 54 ("Real Estate Taxes") shall be deleted in its
entirety and replaced with the following:

                  "54.  REAL  PROPERTY  TAXES:  Paragraph  9 is  modified by the
         following:  

                  A. The term "Real Property  Taxes" shall not include  charges,
         levies or fees

                                                                          JA
                                                                 Initial: ALK
                                                                          ---
                                     Page 9
<PAGE>

                                                                       Quantum 1

         directly related to the use, storage,  disposal or release of Hazardous
         Materials  on  the  Premises  unless   directly   related  to  Tenant's
         Activities  at this  site or on  other  sites  leased  and/or  owned by
         Tenant; however, Tenant shall be responsible for general or special tax
         and/or assessments  (related to Hazardous Materials and/or toxic waste)
         imposed on the Property  provided said special tax and/or assessment is
         not imposed due to on-site originated contamination on the Property (by
         third  parties not related to Tenant)  prior to the Lease  Commencement
         Date.  Subject to the terms and conditions stated herein,  Tenant shall
         be  responsible  for paying one  hundred  percent  (100%) of said taxes
         and/or assessments allocated to the Property.

                  B. If any  assessments  for  public  improvements  are  levied
         against the Premises,  Landlord may elect either to pay the  assessment
         in full or to allow the  assessment to go to bond. If Landlord pays the
         assessment  in full,  Tenant  shall pay to Landlord or any  assignee or
         purchaser of the Premises each time payment of Real  Property  Taxes is
         made a sum  equal  to that  which  would  have  been  payable  (as both
         principal and interest)  had Landlord  allowed the  assessment to go to
         bond.

                  C.  Tenant at its cost shall have the right,  at any time,  to
         seek a  reduction  in the  assessed  valuation  of the  Premises  or to
         contest  any Real  Property  Taxes  that are to be paid by  Tenant.  If
         Tenant  seeks a reduction or contests  such Real  Property  Taxes,  the
         failure  on  Tenant's  part to pay such Real  Property  Taxes  being so
         contested  shall not  constitute  a default so long as Tenant  complies
         with the provisions of this  Paragraph.  Landlord shall not be required
         to join in any  proceeding  or  contest  brought  by Tenant  unless the
         provisions of any law require that the proceeding or contest be brought
         by or in the name of Landlord.  In that case Landlord shall join in the
         proceedings or contest or permit it to be brought in Landlord's name as
         long as Landlord is not  required  to bear any cost.  Tenant,  on final
         determination  of the proceeding or contest,  shall  immediately pay or
         discharge  its  share  of any Real  Property  Taxes  determined  by any
         decision  or  judgment  rendered,  together  with all  costs,  charges,
         interest,  and  penalties  incidental  to the decision or judgment.  If
         Tenant does not pay the Real  Property  Taxes when due  pursuant to the
         Lease and Tenant seeks a reduction or contests them as provided in this
         paragraph,  before the commencement of the proceeding or contest Tenant
         shall furnish to Landlord a surety bond in form reasonably satisfactory
         to Landlord issued by an insurance  company qualified to do business in
         California. The amount of the bond shall equal 125% of the total amount
         of Real Property Taxes in dispute and any such bond shall be assignable
         to any  lender  or  purchaser  of the  Premises.  The bond  shall  hold
         Landlord and the Premises  harmless from any damage  arising out of the
         proceeding or contest and shall insure the payment of any judgment that
         may be rendered."

         14.  PROPERTY  INSURANCE:  Effective  as of the  first day of the Third
Option Period,  section B of Lease Paragraph 55 ("Property  Insurance") shall be
deleted in its entirety and be of no further force or effect.

         15.  ASSIGNMENT  AND  SUBLETTING:  Effective as of the first day of the
Third Option Period,  Lease Paragraph 56 ("Assignment and Subletting")  shall be
deleted in its entirety and replaced with the following:

                  "56.  ASSIGNMENT AND SUBLETTING'  The following  modifications
         are made to Paragraph 16:

                  A. In the event that Tenant  seeks to make any  assignment  or
         sublease,  then  Landlord,  by  giving  Tenant  written  notice  of its
         election  within fifteen (15) days after  Tenant's  notice of intent to
         assign or sublease has been given to Landlord,  shall have the right to
         elect (i) to withhold its consent to such  assignment  or sublease,  as
         permitted  pursuant  to  Paragraph  16, or (ii) to permit  Tenant to so
         assign the Lease or sublease such part of the Premises,  in which event
         Tenant may do so, but without  being  released of its liability for the
         performance  of  all  of its  obligations  under  the  Lease,  and  the
         following  shall  apply  (except  the  following  shall  not apply to a
         "Permitted Transfer" described in Paragraph 57):

                                                                          JA
                                                                 Initial: ALK
                                                                          ---
                                     Page 10
<PAGE>

                                                                       Quantum 1

                           (1) If Tenant  assigns  its  interest  in this Lease,
         then in addition to the rental provided for in this Lease, Tenant shall
         pay to Landlord fifty percent (50%) of all Rent and other consideration
         received  by  Tenant  over and above (i) the  assignee's  agreement  to
         assume  the  obligations  of  Tenant  under  this  Lease  and  (ii) all
         "Permitted   Transfer  Costs"  (as  defined  herein)  related  to  such
         assignment.  As used herein, the term "Permitted  Transfer Costs" shall
         mean all  reasonable  leasing  commissions  paid to third  parties  not
         affiliated with Tenant in order to obtain the assignment or sublease in
         question.

                           (2) If Tenant  sublets  all or part of the  Premises,
         then Tenant shall pay to Landlord in addition to the Rent  provided for
         in this Lease fifty percent (50%) of the positive difference,  if any,
         between (i) all rent and other consideration paid or provided to Tenant
         by the  subtenant,  less  (ii)  all Rent  paid by  Tenant  to  Landlord
         pursuant to this Lease which is allocable to the area so sublet and all
         Permitted  Transfer  Costs related to such  sublease.  After Tenant has
         recovered all Permitted Transfer Costs Tenant shall pay to Landlord the
         amount specified in the preceding  sentence on the same basis,  whether
         periodic or in lump sum, that such rent and other consideration is paid
         to Tenant by its subtenant,  within seven (7) days after it is received
         by Tenant.

                          (3) Tenant's obligations under this subparagraph shall
         survive  any  assignment  or  sublease.  At the time  Tenant  makes any
         payment to Landlord required by this subparagraph, Tenant shall deliver
         an  itemized  statement  of the  method  by which  the  amount to which
         Landlord is entitled  was  calculated,  certified by Tenant as true and
         correct.  Landlord  shall have the right to inspect  Tenant's books and
         records  relating to the payments  due  pursuant to this  subparagraph.
         Upon request  therefor,  Tenant shall deliver to Landlord copies of all
         bills,  invoices or other  documents  upon which its  calculations  are
         based. 

                           (4) As used herein,  the term  "consideration"  shall
         mean  any  consideration  of  any  kind  received,  or to  be  received
         (including,   but  not  limited  to,  services  rendered  and/or  value
         received) by Tenant as a result of the assignment or sublease,  if such
         sums are paid or provided to Tenant for Tenant's interest in this Lease
         or in the Premises.

                           (5)  This   Paragraph   56.A  does  not  apply  to  a
         "Permitted  Transfer",  as provided in Paragraph 57 hereof. The parties
         agree  that  if any  of the  following  transactions  occur  and do not
         qualify as "Permitted Transfers", Tenant must obtain Landlord's consent
         to such  transaction  and if Landlord  consents to any of the following
         transactions  which do not otherwise qualify as "Permitted  Transfers",
         then the  provisions  of this  Paragraph  56.A  shall  not apply to the
         following   transactions:   (i)  a  merger,   consolidation   or  other
         reorganization in which Tenant is not the surviving corporation so long
         as 95%  of  all  assets  and  liabilities  of  Tenant  are  permanently
         transferred to such assignee; and (ii) an assignment of this Lease to a
         corporation  which  purchases or otherwise  acquires 95% or more of the
         assets of Tenant so long as 95% of all assets and liabilities of Tenant
         are permanently  transferred to such assignee and Tenant remains liable
         and  responsible  under the Lease to the  extent  Tenant  continues  in
         existence following such transaction."

         16. PERMITTED ASSIGNMENTS AND SUBLEASES:  Effective as of the first day
of the Third Option  Period,  Lease  Paragraph 57  ("Permitted  Assignments  and
Subleases") shall be deleted in its entirety and replaced with the following:

                  "57.  PERMITTED  ASSIGNMENTS  AND  SUBLEASES:  Notwithstanding
         anything  contained  in  Paragraph  16,  so  long as  Tenant  otherwise
         complies with the provisions of Paragraph 16 and the Permitted Transfer
         does not release  Tenant  from its  obligations  hereunder,  Tenant may
         enter into any of the  following  transfers  (a  "Permitted  Transfer")
         without  Landlord's  prior  written  consent,  and  the  provisions  of
         Paragraph 56A shall not apply to any such Permitted Transfer:

                  A. Tenant may  sublease  all or part of the Premises or assign
         its  interest  in this  Lease to any  corporation  which  controls,  is
         controlled by, or is under common control

                                                                          JA
                                                                 Initial: ALK
                                                                          ---
                                     Page 11
<PAGE>

                                                                       Quantum 1

         with  Tenant  by means of an  ownership  interest  of more  than  fifty
         percent (50%)   providing Tenant remains liable for the payment of Rent
         and full performance of the Lease;

                  B.  Tenant  may  assign  its   interest  in  the  Lease  to  a
         corporation  which  results  from  a  merger,  consolidation  or  other
         reorganization in which Tenant is not the surviving corporation so long
         as (i) 95% of all assets  and  liabilities  of Tenant  are  permanently
         transferred to such assignee, and (ii) immediately prior to the merger,
         consolidation  or other  reorganization,  the  corporation  into  which
         Tenant is to be merged has a net worth equal to or greater than the net
         worth of Tenant at the time of Lease  execution  or at the time of such
         assignment,  merger,  consolidation  or  reorganization  (whichever  is
         greater),  or if it does not,  Landlord  is  provided a guaranty of the
         Lease (in a form reasonably  acceptable to Landlord) from a corporation
         (a)  that is the  parent  of,  or is  otherwise  affiliated  with,  the
         corporation  into  which  Tenant is to be  merged,  and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the time of Lease execution or at the time of such assignment,  merger,
         consolidation or  reorganization  (whichever is greater).  In the event
         there is not a  permanent  transfer  of 95% or more of the  assets  and
         liabilities from Tenant to a third party, and Tenant continues to exist
         as a separate  entity,  both  companies  shall be jointly and severally
         liable for the full terms and conditions of the Lease;

                  C.  Tenant  may  assign  this  Lease  to a  corporation  which
         purchases or otherwise  acquires 95% or more of the assets of Tenant so
         long as 95% of all assets  and  liabilities  of Tenant are  permanently
         transferred  to such  assignee  (in the event  there is not a permanent
         transfer of 95% or more of the assets and liabilities  from Tenant to a
         third party and Tenant  continues to exist as a separate  entity,  both
         companies shall be jointly and severally  liable for the full terms and
         conditions of the Lease),  and provided that immediately  prior to such
         assignment said  corporation,  has a net worth equal to or greater than
         the net worth of Tenant  (a) at the time of Lease  execution  or (b) at
         the time of such assignment  (whichever is greater), or if it does not,
         Landlord  is  provided  a guaranty  of the Lease (in a form  reasonably
         acceptable to Landlord)  from a corporation  (a) that is the parent of,
         or is otherwise  affiliated  with, said corporation and (b) which has a
         current net worth  equal to or greater  than the net worth of Tenant at
         the  time  of  Lease  execution  or at the  time  of  such  assignment,
         (whichever is greater)."

         17.  DESTRUCTION:  Effective  as of the first  day of the Third  Option
Period, Lease Paragraph 62 ("Destruction")  shall be deleted in its entirety and
replaced with the following:

                  "62. DESTRUCTION: Paragraph 21 is modified by the following:

                  A.  Notwithstanding  anything to the contrary within Paragraph
         21,  Landlord  may  terminate  this Lease in the event of an  uninsured
         event or if insurance proceeds, net of the deductible, are insufficient
         to  cover  one  hundred  percent  of the  rebuilding  costs;  provided,
         however,  Tenant shall have the right to elect, in its  discretion,  to
         contribute such excess funds to permit Landlord to repair the Premises.

                  B. Except as  provided  in  Paragraph  62C,  Landlord  may not
         terminate  the Lease if the Premises are damaged by a peril whereby the
         cost to replace and/or repair is one hundred  percent (100%) covered by
         the insurance carried by Landlord pursuant to Paragraph 12, but instead
         shall restore the Premises in the manner described by Paragraph 21.

                  C. If the  Premises  are  damaged  by a peril  covered  by the
         insurance  carried by Landlord pursuant to Paragraph 12, Landlord shall
         have  the  option  to  terminate  the  Lease  if each of the  following
         conditions is satisfied:  (i) the cost to repair or the damage  exceeds
         thirty-three  percent  (33%)  of  the  then  replacement  cost  of  the
         Premises;  and (ii) the damage occurs at a time when there is less than
         five (5) years remaining in the term of the Lease.

                  D. If Landlord fails to obtain insurance as required  pursuant
         to Paragraph 12,

                                                                          JA
                                                                 Initial: ALK
                                                                          ---
                                     Page 12
<PAGE>

                                                                       Quantum 1

         and said  insurance  would have been  available  to cover any damage or
         destruction to the Premises,  Landlord shall be required to rebuild, at
         its cost,  net of the  deductible  which would have been required under
         said insurance policy (which deductible Tenant is required to pay).

                  E. If the Premises  are damaged by any peril,  then as soon as
         reasonably practicable,  Landlord shall furnish Tenant with the written
         opinion of Landlord's  architect or construction  consultant as to when
         the  restoration  work  required of Landlord may be  completed.  Tenant
         shall have the option to  terminate  this Lease in the event any of the
         following  occurs,  which option may be  exercised  only by delivery to
         Landlord of a written notice of election to terminate  within seven (7)
         days after  Tenant  receives  from  Landlord  the  estimate of the time
         needed to complete such restoration:

                           (1) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors or invitees)  and, in the reasonable  opinion of Landlord's
         architect or  construction  consultant,  the  restoration of the Leased
         Premises cannot be  substantially  completed  within 180 days after the
         date of such damage (subject to force majeure conditions); or

                           (2) The Premises are damaged by any peril (not caused
         by or resulting from an action of Tenant or Tenant's agents, employees,
         contractors or invitees)  within twelve (12) months of the last day  of
         the Lease term, and, in the reasonable opinion of Landlord's  architect
         or  construction  consultant,  the  restoration of the Leased  Premises
         cannot be substantially completed within sixty (60) days after the date
         of such damage and Tenant has not  exercised  its Option to Extend said
         Term (or Extended Term as the case may be)."

         18.  LIABILITY  INSURANCE:  Effective  as of the first day of the Third
Option Period, the first sentence of Lease Paragraph 10 ("Liability  Insurance")
shall be deleted and replaced with the following:  "Tenant, at Tenant's expense,
agrees to keep in force  during  the Term of this  Lease a policy of  commercial
general liability insurance with combined single limit coverage of not less than
Two Million Dollars  ($2,000,000)  per occurrence for bodily injury and property
damage occurring in, on or about the Premises,  including parking and landscaped
areas."

         19. LIMITATION OF LIABILITY: Effective as of the first day of the Third
Option Period,  Lease Paragraph 36 ("Limitation of Liability")  shall be deleted
in its entirety and replaced with the following:

                  "36. LIMITATION OF LIABILITY: In consideration of the benefits
         accruing hereunder,  Tenant and all successors and assigns covenant and
         agree that,  in the event of any actual or alleged  failure,  breach or
         default hereunder by Landlord:

         (i) the sole and exclusive remedy shall be against Landlord's  interest
         in the Premises leased herein;
         (ii) no  partner of  Landlord  shall be sued or named as a party in any
         suit or action  (except as may be necessary to secure  jurisdiction  of
         the partnership);
         (iii) no  service  of  process  shall be made  against  any  partner of
         Landlord  (except as may be  necessary  to secure  jurisdiction  of the
         partnership);
         (iv) no partner of Landlord  shall be  required to answer or  otherwise
         plead to any service of process;
         (v) no judgment will be taken against any partner of Landlord;
         (vi) any judgment  taken against any partner of Landlord may be vacated
         and set aside at any time without hearing;
         (vii) no writ of  execution  will ever be levied  against the assets of
         any partner of Landlord;
         (viii) these covenants and agreements are enforceable  both by Landlord
         and also by any partner of Landlord.

                  Tenant  agrees  that  each  of  the  foregoing  covenants  and
         agreements shall be

                                     Page 13
                                                                          JA
                                                                 Initial: ALK
                                                                          ---

<PAGE>
                                                                       Quantum 1

         applicable to any covenant or agreement either  expressly  contained in
         this Lease or imposed by statute or at common law."


        EXCEPT AS MODIFIED HEREIN, all other terms, covenants, and conditions of
said October 31, 1989 Lease Agreement shall remain in full force and effect.

        IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No.
3 to Lease as of the day and year last written below.


LANDLORD:                                   TENANT:

JOHN ARRILLAGA SURVIVOR'S                   QUANTUM CORPORATION              
TRUST                                       a Delaware corporation           
                                                                             
                                                                             
By /s/ John Arrillaga,                      By  /s/ Andrew Kryder            
   -------------------                        -------------------
John Arrillaga, Trustee                                                      
                                            Andrew Kryder                    
                                            -----------------
Date:  6/30/97                              Print or Type Name               
      ---------                                                              
RICHARD T. PEERY SEPARATE                   Title: FINANCE AND CORP GENERAL
PROPERTY TRUST                                     COUNSEL
                                                   ------------------------
                                            Date:  6/25/97
                                                   --------
By /s/ Richard T. Peery
  -----------------------
Richard T. Peery, Trustee

Date: 6/26/97
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                                                                         Lease 6
                                                                      Building 6

QUANTUM CORPORATION
500 McCarthy Blvd.
Milpitas, CA 95035

Attention: Norm Claus

RE:      CONSTRUCTION AGREEMENT RELATED TO LEASE AGREEMENT DATED APRIL 16, 1997,
         BY AND BETWEEN THE JOHN ARRILLAGA  SURVIVOR'S  TRUST AND THE RICHARD T.
         PEERY SEPARATE PROPERTY TRUST, AS LANDLORD, AND QUANTUM CORPORATION,  A
         DELAWARE  CORPORATION,  AS TENANT,  FOR ALL OF THAT CERTAIN  182,355+/-
         SQUARE FOOT BUILDING TO BE CONSTRUCTED BY LANDLORD FOR TENANT,  LOCATED
         ON SUMAC DRIVE, IN MILPITAS, CALIFORNIA.

Gentlemen:

         This letter will  confirm  our  agreement  relative to the shell of the
building and interior improvements related thereto to be constructed by Landlord
on the property leased under the lease referenced above, hereinafter referred to
as the "Lease", and shall be considered a part of the Lease.

         1.  DEFINITIONS:  As used in this  construction  letter,  the following
terms shall have the following meanings,  and terms which are not defined below,
but which are defined in the Lease which are used in this  construction  letter,
shall have the meanings ascribed to them by the Lease:

                  A. Design  Criteria:  The term  "Design  Criteria"  shall mean
those  plans  and  specifications  for the  Improvements  to be  constructed  by
Landlord and/or Tenant (as the case may be) as hereinafter set forth and (i) the
building  elevations  to be  depicted  on Exhibit  "A" to the Lease and (ii) the
building shell design criteria  described on Exhibit "A" to the Lease, and shall
include the other plans for the  Improvements  when  completed by the parties as
provided for in this Agreement.

                  B. Shell  Improvements:  The term "Shell  Improvements"  shall
mean the following  which are to be constructed  by Landlord in accordance  with
the Design Criteria: (i) the shell of a two story industrial building containing
approximately  +/- 182,355  square feet,  consisting  of  foundation,  first and
second story floor slab and second story floor deck,  load bearing  walls,  roof
system,  roof membrane,  standard width interior  stairways,  exterior doors and
exterior  door  hardware;  and (ii) all  paving  and  parking  areas,  striping,
sidewalks, parking curbs, gutters, irrigation system, landscaping,  storm sewer,
and main utility service conduits  (excluding  electrical panel which is part of
Interior  Improvements) from the street to the building  perimeter,  transformer
pad, the main plumbing line into the building,  water and sewer  connection fees
including cost to hook up to Milpitas sewer system,  but excluding roof screens,
building connectors,  parking lot lighting,  and utility pads including exterior
walls  and  all  other  construction  elements  of any  such  utility  pads  and
electrical panels.

                  C. Interior  Improvements:  The term  "Interior  Improvements"
shall mean all  improvements  to be  constructed by Landlord and paid for by the
parties as hereinafter set forth,  within the building shell and/or not included
in the  Shell  Improvements  set forth in  Paragraph  lB above  e.g.,  by way of
example  interior  improvements  shall  include  and not be  limited to the fire
sprinkler  system,  elevators (if any),  loading  docks (if any),  roof screens,
building connectors,

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drop  ceilings,   interior  plumbing,   heating  and  air  conditioning  system,
electrical  system,  parking lot  lighting,  carpeting,  vinyl  floor  covering,
painting, interior walls and movable floor to ceiling partitioning, utility pads
(including all construction  elements of subject utility pads, including but not
limited to, the exterior walls),  normal  contractor's  fees,  architect's fees,
engineer's fees and any City or governmental fees for connection to utilities.

                  D. Improvements:  The term "Improvements" shall mean the Shell
Improvements and the Interior Improvements.

                  E. Performance Schedule: The term "Performance Schedule" shall
mean the  estimated  times for  commencement  and  performance  of  construction
obligations contained in Paragraph 2 of this Agreement.

                  F.  Architect:  The term  "Architect"  shall  mean (i)  Hoover
Associates  and/or  Peery/Arrillaga  or  such  other  licensed  architect  as is
approved  by  Landlord  with  respect to the Shell  Improvements,  and (ii) such
licensed  architect  as is approved by Landlord  and Tenant with  respect to the
Interior Improvements.

                  G. Prime Contractor(s): The term "Prime Contractor" shall mean
(i) Vance M. Brown & Sons, Inc., or such other  contractor  selected by Landlord
for the  construction of the Shell  Improvements  and (ii) such licensed general
contractor  as is approved by Landlord  and Tenant with  respect to the Interior
Improvements.

                  H. Substantial  Completion: The term "Substantial  Completion"
(and  "Substantially  Completed")  shall mean the date when all of the following
have occurred with respect to the Improvements in question: (i) the construction
of the Improvements in question has been  substantially  completed in accordance
with the  approved  plans  therefor  except for punch  list  items  which do not
prevent Tenant from reasonably using the Premises to conduct Tenant's  business;
(ii) Landlord has executed a  certificate  or statement  representing  that such
Improvements that Landlord is responsible for completing have been substantially
completed in accordance  with the plans and  specifications  therefor except for
punch list items which do not prevent Tenant from reasonably  using the Premises
to conduct  Tenant's  business and  incomplete  items  related to delays  caused
directly  and/or  indirectly by Tenant;  and (iii) if  applicable,  the Building
Department of the City of Milpitas has  completed  its final  inspection of such
Improvements  and has "signed off" the building  inspection  card approving such
work as complete  except for punch list items  which do not prevent  Tenant from
reasonably using the Premises to conduct Tenant's business.

                  I. Target  Commencement  Date:  The term "Target  Commencement
Date" shall mean May 1, 1998,  subject to delays  caused by (i) by the governing
agency(ies)   approval   and/or  (ii)   strikes,   acts  of  God,   governmental
restrictions,  or other causes beyond Landlord's  control, in which instance the
time  period  for  Landlord's  completion  of the  building  shall  be  extended
accordingly.

       2.  Performance  Schedule:  Landlord  and  Tenant  desire  to  cause  the
Improvements to be Substantially  Completed by the Target Commencement Date. The
Target  Commencement Date is based upon information  gathered and estimates made
by  Landlord,  which  are  reflected  in the  Construction  Schedule.  Achieving
Substantial  Completion  of the  Improvements  by the Target  Commencement  Date
requires that certain  objectives be met within certain time periods.  Set forth
in this paragraph is a schedule of certain critical dates relating to Landlord's
and Tenant's  respective  obligations  regarding the  construction  of the Shell
Improvements and the Interior  Improvements  (the  "Performance  Schedule") that
must  be  adhered  to  in  order  to  achieve  Substantial   Completion  of  all
Improvements by the Target  Commencement Date. Landlord and Tenant shall each be
obligated to use  reasonable  efforts to perform  their  respective  obligations
within the time periods set forth in the  Performance  Schedule and elsewhere in
this Improvement Agreement. Subject to the provisions of Paragraph 8 hereof, the
parties  acknowledge  that the  Performance  Schedule is only an estimate of the
time needed to complete certain stages of the

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construction  process, and the failure of either party to accomplish any step in
the process set forth in the  Performance  Schedule  within the applicable  time
period  shall not  constitute  a default by either  party  unless  such  failure
constitutes a breach of the obligation of a party to use  reasonable  efforts to
perform its  obligations  within the time  periods set forth in the  Performance
Schedule and elsewhere in this  construction  letter and appropriate  notice has
been given and any applicable cure period has expired.  The Performance Schedule
is as follows:

Action                                                             Responsible
Items                     Due Date                                    Party,

A.   Delivery          of     Provided to Tenant by Landlord        Landlord
     Definitive     Shell     on  January  30,  1997  (Shell   
     Plans to Tenant          Plans     showing     columns,   
                              windows, shear structure,  "K"   
                              bases and core area(s)).         
                              
B.   Approval          of     Provided to Landlord by Tenant        Tenant
     Definitive     Shell     on March 3, 1997              
     Plans by Tenant  and     
     Delivery of Tenant's 
     Shell Requirements   
     
C.   Delivery   of  Final       April 30, 1997                      Landlord
     Shell    Plans    to       
     Tenant                     
     
D.   Approval   of  Final       Within  5  days  after  Tenant      Tenant
     Shell    Plans    by       receives  final shell  working  
     Tenant                     drawings                        
                                 
E.   Obtain      Building       July 7, 1997                        Landlord
     Permit   for   Shell    
     Improvements            
     
F.   Delivery to Landlord       May 23, 1997                        Tenant
     of       Preliminary  
     Interior Improvement  
     Plans                 
     
G.   Approval          of       Within 5 days  after  Landlord      Landlord
     Preliminary Interior       receives  Preliminary Interior 
     Improvement Plans by       Improvement Plans              
     Landlord                   
     
H.   Delivery   of  Final       August 5, 1997                      Tenant
     Interior Improvement   
     Plans to Landlord      
     
I.   Approval by Landlord      Within 5 days  after  Landlord       Landlord
     of  Final   Interior      receives Final Interior Plans 
     Plans                     
     

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J.    Commencement of          As soon as reasonably possible       Landlord
      Construction of          after receipt of
      Improvements             building permit

K.     Substantial             May 1, 1998                          Landlord
       Completion of
       Improvements

         3.  DEVELOPMENT  OF  PLANS  FOR  IMPROVEMENTS'   Plans  for  the  Shell
Improvements shall be developed in accordance with the following:

                  A. Development of Definitive Shell Plans:  Tenant and Landlord
have agreed to the basic  architectural  design and areas to contain landscaping
and parking relating to the Premises as shown on Exhibit "A" to the Lease. On or
before the due date specified in the Performance Schedule,  Landlord shall cause
Architect  to  prepare  and  deliver  to  Tenant  for its  review  and  approval
definitive plans for the Shell Improvements which are the logical and reasonable
development  of the Design  Criteria  and Exhibit  "A" and show such  details as
columns,  windows, shear structure,  "K" bases and core area(s) (the "Definitive
Shell Plans"). On or before the due date specified in the Performance  Schedule,
Tenant  shall  either  approve  such plans or notify  Landlord in writing or its
specific  objections to the Definitive Shell Plans. With regard to such approval
the parties  agree as follows:  (i) the Basic Rent and the amount of  Landlord's
Interior  Improvement  allowance  pursuant to paragraph 6B hereof are based upon
the gross  leasable  area of the building;  (ii) the gross  leasable area of the
building  shall be measured from the outside of exterior walls and shall include
any atriums,  covered  entrances or egresses,  and covered loading areas;  (iii)
that part of the gross leasable area of the building  occupied by  indentations,
building  overhangs,  covered  entrances,  and covered  loading  areas shall not
consist of more than five percent  (5%) of the total gross  leasable  area;  and
(iv) the Definitive Shell Plans shall be modified to conform with the intent and
restfictions  set  forth in  phrases  (i),  (ii)  and  (iii)  above  and in this
sentence; and (v) Tenant's Shell Requirements (as hereinafter defined) shall not
affect the exterior appearance or structural  integrity or cost of the Premises,
and it is agreed that any increased cost in the Shell  Improvements  as a result
of any of Tenant's Shell or Interior Requirements shall be a cost to be paid for
by Tenant. If Tenant reasonably objects to the Definitive Shell Plans,  Landlord
shall cause  Architect  to revise the  Definitive  Shell  Plans to address  such
objections in a manner consistent with the parameters for the Shell Improvements
set forth in this construction letter and the Design Criteria and shall resubmit
such revised Definitive Shell Plans as soon as reasonably  practicable to Tenant
for its approval.  When such revised  Definitive  Shell Plans are resubmitted to
Tenant,  it shall either  approve  such plans or notify  Landlord of any further
objections in writing  within five (5) business days after receipt  thereof.  If
Tenant has further  objections to the revised  Definitive Shell Plans,  Landlord
and Tenant shall  immediately  cause  Architect to meet and confer with Tenant's
construction consultant and the Prime Contractor,  who together and (by majority
vote of Landlord, Tenant, Architect, Tenant's construction consultant, and Prime
Contractor) shall apply the standards set forth in this construction  letter and
the  Design  Criteria  to  resolve  Tenant's  objections  and  incorporate  such
resolution into the Definitive  Shell Plans,  which process  Landlord and Tenant
shall cause to be completed  within five (5) business days after the  conclusion
of the five (5) business day referred to the immediately preceding sentence, and
the  decision of the majority of the parties set forth above shall be binding on
Tenant and Landlord.  Tenant  furnished to Landlord on April 18, 1997  schematic
plans and specifications for plumbing,  electrical, heating and air conditioning
that affect the  construction  of the Shell  Improvements as well as other items
that were required to be constructed as part of the Shell  Improvements  without
modification being required at a later time ("Tenant's Shell Requirements").

                  B.  Development  of Final Shell  Plans:  Landlord  shall cause
Architect  to  complete  and submit to Tenant  for its  approval  final  working
drawings for the Shell Improvements by the due date specified in the Performance
Schedule which are the logical and

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reasonable development of the Design Criteria and the Definitive Shell Plans and
which   incorporate   and  are  consistent   with  Tenant's   reasonable   Shell
Requirements. Tenant shall approve the final plans for the Shell Improvements or
notify Landlord in writing of its specific  objections by the due date specified
in the Performance  Schedule. If Tenant so objects, the parties shall confer and
reach agreement upon final working  drawings for the Shell  Improvements  within
five (5) business days after Tenant has notified Landlord of its objections.  In
the event Tenant and Landlord do not resolve all of Tenant's  objections  within
such five (5) business day time  period,  Landlord and Tenant shall  immediately
cause Architect to meet and confer with Tenant's construction consultant and the
Prime  Contractor,  who  together and (by  majority  vote of  Landlord,  Tenant,
Architect,  Tenant's construction consultant,  and Prime Contractor) shall apply
the  standards  set  forth  in this  construction  letter  to  resolve  Tenant's
objections and incorporate  such resolution into the final working  drawings for
the Shell  Improvements,  which  process  Landlord  and Tenant shall cause to be
completed  within five (5) business  days after the  conclusion  of the five (5)
business day period  referred to in the immediately  preceding  sentence and the
decision  of the  majority  of the  parties  set forth above shall be binding on
Tenant and  Landlord.  The final  working  drawings so approved by Landlord  and
Tenant or by majority  vote as set forth above  (including  all changes  made to
resolve Tenant's  objections approved by the majority of the parties pursuant to
the immediately  preceding  sentence) are referred to herein as the "Final Shell
Plans".

                  C.  Governmental  Approvals:  As soon as the Final Shell Plans
have been  approved  by  Landlord  and  Tenant,  Landlord  shall  apply for site
development approval and a building permit for the Shell Improvements, and shall
diligently prosecute to completion such approval process.

                  D. Commencement of Shell  Improvements:  As soon as reasonably
possible after receipt of a building permit for the Shell  Improvements (acts of
God and delays beyond  Landlord's  control  excepted),  Landlord  shall commence
construction  of the Shell  Improvements  and shall  diligently  prosecute  such
construction to completion,  using all reasonable efforts to achieve Substantial
Completion  of  the  Shell  Improvements  by  the  due  date  specified  in  the
Performance Schedule.

       4. DEVELOPMENT OF PLANS FOR INTERIOR IMPROVEMENTS: Plans for the Interior
Improvements shall be developed in accordance with the following:

                  A. Development of Preliminary Interior Plans: On or before the
due date specified in the Performance Schedule, Tenant shall prepare and deliver
to  Landlord  for its review and  approval  preliminary  plans for the  Interior
Improvements  (the  "Preliminary  Interior  Plans").  On or before  the due date
specified in the Performance Schedule,  Landlord shall either approve such plans
in  writing  or notify  Tenant in  writing  of its  specific  objections  to the
Preliminary  Interior  Plans.  If Landlord so objects,  Tenant  shall revise the
Preliminary  Interior  Plans to address such  objections in a manner  consistent
with the parameters for the Interior Improvements set forth in this construction
letter and shall  resubmit such revised  Preliminary  Interior  Plans as soon as
reasonably  practicable (but in no event later than 10 days) to Landlord for its
approval.  It is agreed that Tenant's  Preliminary  Interior  Improvement  plans
shall not affect the exterior appearance or structural  integrity or cost of the
Shell  Improvements,  and it is further  agreed that Landlord will not object to
reasonable structural changes (subject to the provisions of Paragraph 8) as long
as  Tenant  agrees  to pay for any  additional  cost for  same and the  exterior
appearance  of  the  Shell  Improvements  is  not  altered.   When  the  revised
Preliminary Interior Plans are resubmitted to Landlord,  it shall either approve
such plans in  writing or notify  Tenant of any  further  objections  in writing
within three (3) business  days after receipt  thereof.  If Landlord has further
objections to the revised Preliminary Interior Plans,  Landlord and Tenant shall
immediately  meet and confer and together shall apply the standards set forth in
this construction  letter to resolve Landlord's  objections and incorporate such
resolution  into the  Preliminary  Interior  Plans,  which process  Landlord and
Tenant  shall cause to be completed  within  three (3)  business  days after the
conclusion of the three (3) business day period referred to

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in the immediately preceding sentence. In resolving Landlord's  objections,  the
parties  agree to act  reasonably  so as to promptly  finalize  the  Preliminary
Interior  Plans.  Paragraph  8 hereof  shall  apply to any  failure of Tenant to
promptly and reasonably work with Landlord in this regard.

                  B.  Development of Final Interior Plans:  Within 90 days after
Tenant's  receipt of the Definitive Shell Plans (which date shall be extended by
one day for each day in excess of 10 days that  Landlord  fails to  approve  the
Preliminary Interior Plans), Tenant shall cause Architect to complete and submit
to  Landlord  for  its  approval   final  working   drawings  for  the  Interior
Improvements which are the logical and reasonable development of the Preliminary
Interior  Plans.  Landlord  shall  approve  in writing  the final  plans for the
Interior  Improvements or notify Tenant in writing of its specific objections by
the due date specified in the Performance  Schedule.  It is agreed that Tenant's
final  interior  plans shall not affect the exterior  appearance  or  structural
integrity  or cost of the Shell  Improvements,  and it is  further  agreed  that
Landlord  will not  object to  reasonable  structural  changes  (subject  to the
provisions  of Paragraph 8) as long as Tenant  agrees to pay for any  additional
cost for same and the  exterior  appearance  of the  Shell  Improvements  is not
altered.  If Landlord so objects,  the parties shall confer and use,  their best
efforts  to  reach  agreement  upon  final  working  drawings  for the  Interior
Improvements   and  together  shall  apply  the  standards  set  forth  in  this
construction  letter to  resolve  Landlord's  objections  and  incorporate  such
resolution  into the final working  drawings for the Shell  Improvements,  which
process  Landlord and Tenant shall cause to be completed within six (6) business
days  after  Landlord  has  notified  Tenant  of its  objections.  In  resolving
Landlord's  objections,  the parties  agree to act  reasonably so as to promptly
finalize  the final  interior  plans,  it being  agreed that the  provisions  of
paragraph 8 of this  Agreement  shall apply to any failure of Tenant to promptly
and  reasonably  finalize  the interior  plans.  The final  working  drawings so
approved  by  Landlord  and  Tenant  (including  all  changes  made  to  resolve
Landlord's objections approved by Landlord and Tenant pursuant to the above) are
referred to herein as the "Final  Interior Plans' and shall be considered a part
of Exhibit "B" to the Lease.

                  C. Building  Permit:  As soon as the Final Interior Plans have
been approved by Landlord and Tenant, Landlord shall apply for a building permit
for the Interior Improvements, and shall diligently prosecute to completion such
approval process.

                  D. Commencement of Interior Improvements: On or before the due
date  specified  in the  Performance  Schedule  (acts of God and  delays  beyond
Landlord's  control  excepted),  Landlord  shall  commence  construction  of the
Interior  Improvements  and shall  diligently  prosecute  such  construction  to
completion,  using all reasonable efforts to achieve  Substantial  Completion of
the Interior Improvements by the date specified in the Performance Schedule.

       5.  CONSTRUCTION OF  IMPROVEMENTS:  The Improvements to be constructed as
part of the  Premises  in  connection  with the  Lease  shall be paid for by the
parties as hereinafter set forth in Paragraph 6 and constructed in the following
manner:

                  A.  Construction  of  Improvements  by  Landlord:   The  Shell
Improvements  and  Interior  Improvements  shall be  constructed  by Landlord in
accordance  with the Final Shell Plans and the Final  Interior  Plans;  it being
agreed, however, that if the Shell Improvements and/or Interior Improvements, as
finally  constructed,  do not conform exactly to the plans and specifications as
set forth in the Final Shell Plans and Final  Interior Plans and as provided for
in the Lease, and the general appearance, structural integrity, and Tenant's use
and occupancy of the Premises and/or the building and the interior  improvements
relating thereto are not unreasonably  affected by such deviation,  it is agreed
that the Commencement  Date of the Lease, and Tenant's  obligation to pay rental
thereunder,  shall not be affected,  and Tenant hereby agrees, in such event, to
accept  the  Premises  and/or  building  and  interior   improvements  in  their
configuration as constructed by Landlord.

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                  B.  Construction  Contract  for  Interior  Improvements:   The
Interior  Improvements shall be constructed,  in conformance (except as provided
above) with the Final Interior  Plans approved by Landlord and Tenant.  Landlord
and Tenant shall  participate  equally in the negotiations with Prime Contractor
to establish the Prime  Contractor's fee, or profit,  overhead,  and the general
conditions  of a contract  with Prime  Contractor  for the  construction  of the
Interior  Improvements.  The final Interior Improvements contract with the Prime
Contractor  shall be subject to the prior  approval of both Landlord and Tenant.
Tenant agrees not to unreasonably  object to and to promptly  execute such final
contract  with the  Prime  Contractor  so long as the Prime  Contractor's  fees,
general  conditions,  and  overhead  are  reasonable  when  compared to industry
standards for comparable sized jobs. In the event Tenant unreasonably objects to
such contract and does not timely  execute the same,  Tenant agrees to be liable
for the delay as set forth in  paragraph  8 and the Lease will  commence  on the
scheduled Lease  commencement  date regardless of whether or not the building is
ready for  Tenant's  occupancy.  It is agreed  that all  subcontractors  for the
Interior  Improvements  shall be chosen by a  competitive  bid process where (i)
Tenant shall have the right to approve  subcontractors who bid on specific parts
of the job, (ii) unless otherwise  approved by Tenant,  the job shall be awarded
to the lowest responsible  bidder,  (iii) Tenant shall have the right to cause a
subcontract to be rebid (one time only without Tenant being liable for delay) if
Tenant does not approve the low bid (as provided  below).  Landlord shall submit
the proposed list of  sub-contractors  who shall be asked to bid for the project
to Tenant.  Tenant  shall have three (3)  business  days from its receipt of the
proposed  bid list  within  which to approve  the bid list or to add  additional
bidders.  Failure of Tenant to disapprove  any name included on such bid list in
writing within such three (3) business day period or to add  additional  bidders
shall be deemed to be  approval  by Tenant of the bid list as so  presented.  As
soon as the bid of the Prime  Contractor (and all  subcontractors)  is obtained,
Landlord shall submit it to Tenant for review and approval. Any Prime Contractor
or subcontractor  bid not  specifically  disapproved in writing by Tenant within
three (3)  business  days after  Tenant's  receipt of the bid shall be deemed to
constitute  approval  thereof by Tenant and any original bid of Prime Contractor
or subcontractor  disapproved shall be rebid again and Tenant shall not have the
right to object to the  revised  bid as long as the  revised  bid is not greater
than the original bid in which event Tenant shall accept the original  bid. Once
the bids of the Prime Contractor and  subcontractors and the contract terms have
been  approved  as set forth  above,  Landlord  shall  enter into a fixed  price
construction contract for the Interior  Improvements.  However, if the final bid
of the Prime Contractor  (including all  subcontractors'  bids) to construct the
Interior  Improvements  in accordance with the Final Interior Plans would result
in Interior  Improvement  Costs which  exceed  Landlord's  Interior  Improvement
allowance, then (and only one time) the following shall apply: Tenant shall have
ten (10)  business  days from the day it  receives  notice of the final bid from
Landlord  within  which to revise the plans for the  Interior  Improvements  and
resubmit same to Landlord and Prime  Contractor and in the event Tenant fails to
revise the plans for the Interior  Improvements  and submit same to Landlord and
Prime  Contractor  within said ten (10) day period then it is agreed that Tenant
has elected to accept the Prime Contractor's and all subcontractors' bids and to
pay the entire excess amount  pursuant to the  provisions  of  subparagraph  6B,
below. (Notwithstanding the foregoing, however, if, after Tenant has revised the
plans, the Interior  Improvements  Costs will still exceed  Landlord's  Interior
Improvement  allowance,  Tenant  shall pay such  excess  amount as  provided  in
subparagraph 6B below.)  Tenant's  election to revise the plans for the Interior
Improvements  (one  time  only) in the  event  the bid  exceeds  the  amount  of
Landlord's  Interior  Improvement  allowance,  as set forth above,  shall not be
deemed to be a delay on  Tenant's  part  which  would  result in a change of the
commencement of Tenant's  obligation to pay rent pursuant to paragraph 8 hereof,
provided that such revision shall be completed within said ten (10) business day
period and the  provisions  of paragraph 8 hereof shall apply to any  subsequent
revision. In the event Landlord's Interior Improvement allowance is exceeded for
the construction contract for the Interior Improvements,  then it is agreed that
Landlord  and  Tenant  shall  enter  into a  fixed  price  contract  with  Prime
Contractor for the Interior  Improvements  which by its terms provides that each
party is  obligated  to pay only for its  respective  share of the  fixed  costs
thereof as set forth in Paragraph 6, and as stated in such contract.

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<PAGE>

                  It is  expressly  acknowledged  and agreed by Tenant  that the
opportunity set forth above,  whereby Tenant may revise the plans, is a one time
opportunity  and,  if Tenant so elects to revise  the plans,  thereafter  Tenant
shall be subject to the  provisions of Paragraph 8 of this Agreement and the bid
received by Landlord  based on such  revised  plans shall be  considered  final,
shall be accepted by Tenant and  construction  shall proceed without any further
changes except as permitted by Paragraph 7.

                  C. Inspection on Following Completion: As soon as the Interior
Improvements  are  Substantially  Completed  (as that term is  defined  herein),
Landlord and Tenant shall  conduct a joint  walk-through  of the  Premises,  and
inspect  such  Interior  Improvements,  using their best efforts to discover all
incomplete or defective construction.  After such inspection has been completed,
Landlord shall prepare,  and both parties shall sign, a list of all "punch list"
items which the parties  agree are to be corrected by Landlord  (but which shall
exclude any damage or defects caused by Tenant, its employees, agents or parties
Tenant has contracted with to work on the Premises). It is agreed that the Lease
will  commence on the  Commencement  Date  regardless of whether or not a "punch
list" exists.  Landlord shall use reasonable  efforts to complete  and/or repair
such "punch list" items within  thirty (30) days after  executing  such list, it
being  agreed  however,  that the  existence  of any "punch list" items will not
result in any delay of the Commencement Date and will not result in any right of
rent reduction. Tenant shall have the right to occupy the Premises and the Lease
and Tenant's  obligation to pay rent shall commence as soon as the  Improvements
are Substantially Completed, subject to performance by Tenant of its obligations
under this subparagraph and the Lease. Tenant's taking possession of any part of
the Premises shall be deemed to be an acceptance by Tenant of Landlord's work of
improvement,  in accordance  with the terms of the Lease,  except for the "punch
list"  items  noted and  latent  defects  that  could not  reasonably  have been
discovered by Tenant during its inspection of the Interior Improvements prior to
completion  of the list of "punch  list"  items.  With regard to any such latent
defects or other  defects in  construction,  Tenant shall  promptly give written
notice to Landlord when any such defect becomes reasonably apparent specifically
describing such defect, and Landlord shall repair such defect as soon thereafter
as practical;  provided,  however,  the provisions of the immediately  preceding
sentence  regarding such latent  defects,  and of this sentence,  shall be of no
force  and  effect  if  Tenant  shall  fail to give any such  written  notice to
Landlord  within  ninety (90) days after  commencement  of the term of the Lease
after which time Tenant  shall be  responsible  for all latent and  construction
defects not  specified in said ninety (90) day period  regardless  if additional
defects are discovered at a later date and Landlord shall have no obligation for
same.  Notwithstanding  anything  contained  herein  or in the  Lease,  Tenant's
obligation to pay rent under the Lease shall commence on the  Commencement  Date
as  specified  in  the  Lease,  regardless  of  whether  Tenant  completes  such
walk-through inspection or has executed and/or completed such list of the "punch
list"  items,  unless  the Lease term has  previously  commenced,  and  Tenant's
obligation to pay rent under the Lease has begun,  prior to the date of delivery
of  possession  because  of a Tenant  delay in the  course of  construction,  as
provided in paragraph 8 hereof.

         6. PAYMENT OF CONSTRUCTION COSTS:

                  A. Shell  Improvements:  Landlord  agrees to furnish the Shell
Improvements  at its cost,  including  the paving and parking  areas,  striping,
curbs,  and gutters as shown on Exhibit "A" of the Lease, the main plumbing line
into the  building  and  landscaping  and  irrigation  system for the  building.
Stubbing of the actual plumbing  fixtures will be an Interior  Improvement Cost,
and not considered a part of the Shell Improvements.

                  B. Landlord's Interior Improvements Allowance: Landlord agrees
to furnish Tenant with an Interior Improvement  allowance of Twenty-Five Dollars
($25.00)  per square  foot of gross  leasable  area  within the  building  to be
constructed as part of the Shell  Improvements  (e.g,, Four Million Five Hundred
Fifty Eight Thousand Eight Hundred Seventy Five Dollars  ($4,558,875.00)  if the
gross  leasable  area of the building is 182,355  square feet).  This  allowance
shall be considered  Landlord's total monetary contribution with respect to tthe
Interior

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                                                                         -------
                                      -8-
<PAGE>

Improvements,  which  allowance shall be used for the payment of the direct cost
of constructing  the Interior  Improvements  including,  but not limited to, the
fire  sprinkler  system,   loading  docks  (if  any),  roof  screens,   building
connectors,  elevators (if any), drop ceilings,  interior plumbing,  heating and
air conditioning  system,  electrical system,  parking lot lighting,  carpeting,
vinyl floor  covering,  painting,  interior  walls and movable  floor to ceiling
partitioning,  utility  pads  (including  all  construction  elements of subject
utility  pads  including,  but not  limited  to,  the  exterior  walls),  normal
contractor's  fees,   architect's  fees,   engineer's  fees,  and  any  City  or
governmental  fees  for  connection  to  utilities  (the  "Interior  Improvement
Costs").  Notwithstanding the foregoing,  the term "Interior  Improvement Costs"
shall not include any of the following:  (i) real property taxes and assessments
accruing  prior to the  Commencement  Date;  (ii) interest on funds  borrowed or
imputed interest on funds reserved by Landlord to fund the  construction;  (iii)
any administrative or development fee paid to Landlord or any affiliate.

                  C. Proportionate  Allocation of Interior Improvements:  Tenant
hereby specifically  agrees that the Interior  Improvements to be constructed in
the Premises  leased  hereunder shall be spread  proportionately  throughout the
building.

                  D. Liability for Interior  Improvement  Costs Above Landlord's
Allowance: It is further agreed that Tenant shall be responsible for and pay one
hundred  percent  (100 %) of the  Interior  Improvement  Costs  relating  to the
Interior  Improvements  in  excess  of those  that are paid for with  Landlord's
allowance as set forth in subparagraph  6B above.  In addition,  Tenant shall be
responsible for and pay any additional  construction  costs and expenses related
to  the  Shell  Improvements  occasioned  by  changes  or  modifications  in the
Preliminary or Final Shell Plans made by Tenant  pursuant to paragraph 7 or that
are necessary to accommodate Interior Improvements.

                  E. Manner of  Reimbursement  by Tenant:  If the total Interior
Improvement Costs exceeds Landlord's allowance, Tenant shall pay a proportionate
share of each progress  payment due to the contractor  constructing the Interior
Improvements,  which  bears the same  relationship  to the  total  amount of the
progress  payment in question as the amount  Tenant is  obligated to pay for the
Cost of  constructing  the Interior  Improvements.  For purposes of illustration
only, if the total cost of constructing the Interior  Improvements is $5,000,000
then Tenant's  share thereof would be  $441,125.00  (the excess over  Landlord's
total  allowance of  $4,558,875.00  assuming the area of the building is 182,355
square feet), or 8.823% of the total cost. If the first progress payment due the
contractor  is $500,000 then  Tenant's  share of such progress  payment would be
$44,115.00 (or 8.823% of such progress  payment).  For each succeeding  progress
payment,  Tenant  would  likewise  be  obligated  for 8.823%  thereof,  with the
exception that Landlord, at its option, may retain a pro rata share of the final
ten percent (10%) of the interior  contract until 62 days after recordation of a
Notice of Completion on the Premises. Tenant shall pay its share of any progress
payment to Landlord  within ten (10)  business  days after  receipt of a written
statement  therefor  from  Landlord,   together  with  reasonable  documentation
substantiating  the amount set forth in such  statement.  If Tenant fails to pay
any such amount when due,  then  Landlord may (but without the  obligation to do
so) advance  such funds on Tenant's  behalf,  and Tenant  shall be  obligated to
reimburse Landlord for the amount of the funds so advanced on its behalf and all
costs  incurred by Landlord in so doing,  including  interest  thereon at a rate
equal to the  borrowing  rate then charged by  Landlord's  bank,  whether or not
Landlord has actually  borrowed such moneys or merely advanced them from its own
funds.  Any amounts paid to Landlord by Tenant  pursuant to this paragraph shall
be held by Landlord only for  disbursement  to the  contractor in payment of any
such excess Interior Improvement Costs.

         7. CHANGES,  MODIFICATIONS,  OR ADDITIONS TO THE PLANS,  SPECIFICATIONS
AND/OR  PREMISES:  Once the Final Shell Plans and Final Interior Plans have been
finally  approved by Landlord and Tenant,  then  thereafter  neither party shall
have the right to order  extra  work or change  orders  (except  for de  minimis
changes which will not materially or substantially impact or affect Tenant's use
of the Premises) with respect to the  construction of the  Improvements  without
the prior written consent of the other party, which consent shall not be

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<PAGE>
unreasonably withheld or delayed,  provided there is a reasonable basis for such
change.  Tenant shall not,  however,  make any such changes  without  Landlord's
prior  written  approval.  All extra work or change  orders  requested by either
Landlord or Tenant shall be made in writing,  shall  specify the amount of delay
or the time saved resulting therefrom,  and shall become effective and a part of
the approved plans once approved in writing by both parties.  If any such change
or extra  work will  result in the cost of the  Interior  Improvements  being in
excess of Landlord's  allowance,  as set forth in subparagraph 6D, above, Tenant
shall pay the entire  amount of such  excess,  as provided in  subparagraph  6D,
above.

         8. TENANT  DELAYS:  Landlord  and Tenant  acknowledge  that the date on
which Tenant's  obligation to pay rent under the Lease would otherwise  commence
may  be  delayed  because  of a  delay  in  completion  of  construction  of the
Improvements  due to (i)  Tenant's  failure  to  submit  to  Landlord  plans and
specifications  for the  Improvements  by the due  date  set in the  Performance
Schedule, (ii) Tenant's failure to give any necessary approval or consent by the
dates set forth herein,  (iii) any act by Tenant which interferes with or delays
construction  of the  Improvements,  including  Tenant's  entry to install trade
fixtures pursuant to paragraph 10 hereof, (iv) any changes, modifications and/or
additions in the Improvements  requested by Tenant and approved by Landlord,  or
(v) special materials or equipment ordered or specified by Tenant that cannot be
obtained by Landlord at normal cost within a  reasonable  period of time because
of  limited  availability.  It is the  intent  of the  parties  hereto  that the
commencement  of Tenant's  obligation to pay rent under the Lease not be delayed
by any of such  causes  or by any  other  act of  Tenant  (except  as  expressly
provided herein) and, in the event it is so delayed,  Tenant's obligation to pay
rent  under the Lease  shall  commence  as of the date it would  otherwise  have
commenced  absent  delay  caused by Tenant,  provided  that within a  reasonable
period of time after  learning of the occurrence of the cause of any such delay,
Landlord notifies Tenant in writing of the fact that such delay has occurred and
the known or anticipated extent of any such delay.

         9.  ACCOUNTING:   When  the  Interior  Improvements  are  Substantially
Completed,  Landlord  shall  submit  to  Tenant  a final  and  detailed  written
accounting of all Interior  Improvement  Costs paid by Landlord,  which shall be
true and correct,  to the best of  Landlord's  knowledge.  Tenant shall have the
right to audit the books, records and supporting documents of the Landlord or if
Landlord directs, of the Prime Contractor to the extent reasonably  necessary to
determine the accuracy of such accounting, related to the Interior Improvements,
during normal business  hours,  after giving Landlord at least five (5) business
days prior  notice.  Tenant  shall bear the cost of such  audit.  Any such audit
shall be conducted,  if at all,  within sixty (60) days after Landlord  delivers
such accounting to Tenant.

         10. TENANT'S RIGHT TO INSTALL TRADE FIXTURES:  When the construction of
the Interior  Improvements  has  proceeded to the point where  Tenant's  work of
installing  its fixtures and equipment  (including  modular  furniture  systems,
telephone systems,  cabling,  communications systems, security systems, antennas
and signs) in the Premises can be commenced in accordance with good construction
practices and will not interfere  with the  completion  of the  Improvements  by
Landlord,  Landlord  shall notify Tenant to that effect and shall permit Tenant,
and its  authorized  representatives  and  contractors,  to have  access  to the
Premises for the purpose of installing  Tenant's  trade  fixtures and equipment;
provided,  however,  that Landlord shall permit Tenant to enter the Premises for
the  foregoing  purposes  at least  fifteen  (15)  days  prior to the  estimated
Commencement Date. Landlord and Prime Contractor shall use reasonable efforts to
cooperate  fully  with  Tenant  and  its   representatives  and  contractors  in
connection with such installation work by Tenant.  Any such installation work by
Tenant, or its authorized  representatives and contractors,  shall be undertaken
at their sole risk, free from Rent, and upon the following conditions:

                  A.  If  the  entry  into  the  Premises  by  Tenant,   or  its
representatives   or  contractors,   unreasonably   interferes  with  or  delays
Landlord's  construction work notwithstanding  Landlord's  reasonable efforts to
cooperate,  after eight (8) hours notice of such fact to Tenant (i) Tenant shall
cause  the  party  responsible  for such  interference  or  delay  to leave  the
Premises, or

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<PAGE>

(ii) Tenant  shall cause to be taken such steps as may be necessary in the Prime
Contractor's  reasonable  opinion to alleviate such  interference  or delay.  If
either (i) or (ii) have not been completed, then Tenant shall be responsible for
delay of the job and subject to the provisions of Paragraph 8;

                  B. Any contractor used by Tenant in connection with such entry
and  installation  shall be subject  to  Landlord's  approval,  but which may be
withheld if such  contractor  is nonunion  and its entry on the  Premises  would
unreasonably interfere with Landlord's work;

                  C. All of the terms of the Lease  shall  apply to any entry by
Tenant pursuant to this paragraph  (including  provisions of the Lease regarding
indemnification  and  insurance),  except  that,  subject to the  provisions  of
Paragraphs  8 and 10A and B above,  Tenant shall not be obligated as a result of
such entry to pay any Base Monthly Rent or Additional Rent;

                  D. It is agreed that Landlord shall not be required to fix any
defects caused to the Improvements made by Tenant, Tenant's employees, agents or
parties Tenant has contracted with or to work on the Premises;

                  E.  Subject to the  provisions  of Paragraph 8, Tenant and its
agents and  contractors  shall be permitted  to enter the Premises  prior to the
Commencement  Date for the purpose of  installing  Tenant's  trade  fixtures and
equipment  as listed  above.  Any entry or  installation  work by Tenant and its
agents in the  Premises  pursuant to  Paragraph  10 shall (i) be  undertaken  at
Tenant's sole risk,  (ii) not  interfere  with or delay  Landlord's  work in the
Premises,  and (iii) not be deemed  occupancy or  possession of the Premises for
purposes  of the  Lease.  Tenant  shall  indemnify,  defend,  and hold  Landlord
harmless from any and all loss, damage, liability, expense (including reasonable
attorneys   fees),   claim  or  demand  of   whatsoever   character   direct  or
consequential,  including,  but without  limiting  thereby the generality of the
foregoing,  injury to or death of  persons  and  damage  to or loss of  property
arising  out of  the  exercise  by  Tenant  of any  early  entry  right  granted
hereunder.

         11. DELIVERY OF DOCUMENTS: Landlord shall within thirty (30) days after
the same is obtained by Landlord,  deliver to Tenant any  temporary or permanent
certificate  of occupancy  issued by the City of Milpitas with respect to any of
the Improvements.

         12. TAX INCREASES DURING CONSTRUCTION PERIOD: In the event prior to the
Commencement  Date  there is an  interim  or  supplemental  reassessment  of the
Premises  based  upon the added  value of the  Improvements,  then  when  Tenant
accepts  occupancy of the Premises  Tenant shall pay any interim or supplemental
taxes (but no  penalties  or interest in  connection  therewith)  that have been
levied  against  the  Premises  and are  attributable  to the added value of the
Improvements during the period prior to Tenant's occupancy of the Premises.
                                        |
                                        |
                                        |
                      (This Space Left Blank Intentionally)
                                        |
                                        |
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                                                                 Initial:  ALK
                                                                         -------
                                      -11-

<PAGE>

       Please  execute this agreement in the space  provided  below,  indicating
your agreement with the above, and return all copies. A fully executed copy will
be returned to you for your records after execution by the Landlord.

AGREED:                                  Respectfully yours,              
                                                                          
QUANTUM CORPORATION,                     JOHN ARRILLAGA SURVIVOR TRUST    
A Delaware corporation                                                    
                                         

By /s/ Andrew Kryder                     By /s/ John Arrillaga
  -------------------                      ---------------------
Andrew Kryder, Vice President Finance    John Arrillaga, Trustee
and Corporate General Counsel           
                                         Date:  6/30/97
Date: June 25, 1997                           ---------
      -------------
                                         RICHARD T. PEERY SEPARATE
By /s/ Norm Claus                        PROPERTY TRUST
  ------------------
Norm Claus, Vice President Real Estate 
and Corporate Services                   By /s/ Richard T. Peery
                                           -----------------------
                                         Richard T. Peery, Trustee
Date: June 25, 1997
      -------------                      Date:  6/29/97
                                              ---------

                                                                           JA
                                                                 Initial:  ALK
                                                                         -------
                                      -12-




================================================================================


                                CREDIT AGREEMENT

                                      among

                               QUANTUM CORPORATION

                                       and

                             THE BANKS NAMED HEREIN

                                       and

             ABN AMRO BANK N.V., San Francisco International Branch
                                       and
                                   CIBC INC.,
                          as Co-Arrangers for the Banks

                                       and

                       CANADIAN IMPERIAL BANK OF COMMERCE,
                      as Administrative Agent for the Banks

                                       and

             ABN AMRO BANK N.V., San Francisco International Branch,
                       as Syndication Agent for the Banks

                                       and

                         BANK OF AMERICA NATIONAL TRUST
                             AND SAVINGS ASSOCIATION
                      as Documentation Agent for the Banks


                                  June 6, 1997


================================================================================


<PAGE>



                                CREDIT AGREEMENT

                                Table of Contents

                                                                            Page
                                                                            ----

SECTION I.                 INTERPRETATION....................................  1
         1.01.             Definitions.......................................  1
         1.02.             GAAP.............................................. 22
         1.03.             Headings.......................................... 23
         1.04.             Plural Terms...................................... 23
         1.05.             Time.............................................. 23
         1.06.             Governing Law..................................... 23
         1.07.             Construction...................................... 23
         1.08.             Entire Agreement.................................. 23
         1.09.             Calculation of Interest and Fees.................. 23
         1.10.             Other Interpretive Provisions..................... 23

SECTION II.                CREDIT FACILITIES................................. 24
         2.01.             Revolving Loan Facility........................... 24
         2.02.             Letter of Credit Facility......................... 28
         2.03.             Amount Limitations, Commitment Reductions, Etc. .. 33
         2.04.             Fees.............................................. 34
         2.05.             Prepayments....................................... 36
         2.06.             Other Payment Terms............................... 37
         2.07.             Notes and Interest Account........................ 38
         2.08.             Revolving Loan Funding, Etc....................... 38
         2.09.             Pro Rata Treatment................................ 39
         2.10.             Change of Circumstances........................... 41
         2.11.             Taxes on Payments................................. 44
         2.12.             Funding Loss Indemnification...................... 46
         2.13.             Replacement of Banks.............................. 47

SECTION III.               CONDITIONS PRECEDENT.............................. 47
         3.01.             Initial Conditions Precedent...................... 47
         3.02.             Conditions Precedent to Each Credit Event......... 48
         3.03.             Conditions Precedent to Each Conversion or
                           Each Selection of Interest Period................. 48

SECTION IV.                REPRESENTATIONS AND WARRANTIES.................... 49
         4.01.             Borrower's Representations and Warranties......... 49
         4.02.             Reaffirmation..................................... 54

SECTION V.                 COVENANTS......................................... 55
         5.01.             Affirmative Covenants............................. 55
         5.02.             Negative Covenants................................ 59

SECTION VI.                DEFAULT........................................... 73
         6.01.             Events of Default................................. 73
         6.02.             Remedies.......................................... 75

                                        i

<PAGE>

                                                                            Page
                                                                            ----

SECTION VII.               AGENTS AND RELATIONS AMONG BANKS.................. 76
         7.01.             Appointment, Powers and Immunities................ 76
         7.02.             Reliance by Agents................................ 76
         7.03.             Defaults.......................................... 77
         7.04.             Indemnification................................... 77
         7.05.             Non-Reliance...................................... 78
         7.06.             Resignation or Removal of Administrative
                           Agent............................................. 78
         7.07.             Removal of Co-Arrangers........................... 79
         7.08.             Authorization..................................... 79
         7.09.             Agents in Their Individual Capacities............. 80
         7.10.             Agents' Communications Binding Upon Banks......... 80
         7.11.             No Obligations of Borrower........................ 80
         7.12.             Co-Agents......................................... 80

SECTION VIII.  MISCELLANEOUS................................................. 81
         8.01.             Notices........................................... 81
         8.02.             Expenses.......................................... 82
         8.03.             Indemnification................................... 82
         8.04.             Waivers; Amendments............................... 83
         8.05.             Successors and Assigns............................ 84
         8.06.             Setoff; Security Interest......................... 88
         8.07.             No Third Party Rights............................. 89
         8.08.             Partial Invalidity................................ 89
         8.09.             Jury Trial........................................ 89
         8.10.             Counterparts...................................... 89
         8.11.             Confidentiality................................... 89


                                       ii
<PAGE>

SCHEDULES

            I                   Banks
           II                   Pricing Grid
         3.01                   Initial Conditions Precedent
         4.01(p)                Borrower's Subsidiaries
         5.02(a)                Permitted Financial Covenants


EXHIBITS

         A                 Notice of Borrowing (2.01(b))
         B                 Notice of Conversion (2.01(d))
         C                 Notice of Interest Period Selection (2.01(e))
         D                 Note (2.07(a))
         E                 Compliance Certificate (5.01(a))
         F                 Subordinated Debt Terms (5.02(a))
         G                 Assignment Agreement (8.05(c))


                                       iii
 
<PAGE>


                                CREDIT AGREEMENT


         THIS CREDIT AGREEMENT, dated as of June 6, 1997, is entered into by and
among:

                  (1) QUANTUM CORPORATION, a Delaware corporation ("Borrower");

                  (2)  Each  of the  financial  institutions  from  time to time
         listed  in  Schedule  I hereto,  as  amended  from  time to time  (such
         financial  institutions  to be referred to herein  collectively  as the
         "Banks");

                  (3) ABN AMRO BANK N.V.,  San  Francisco  International  Branch
         ("ABN")  and  CIBC  INC.  ("CIBC"),   as  co-arrangers  for  the  Banks
         (collectively in such capacity, the "Co- Arrangers");

                  (4)  CANADIAN  IMPERIAL  BANK OF COMMERCE,  as  administrative
         agent for the Banks (in such  capacity,  the  "Administrative  Agent");
         BANK  OF  AMERICA   NATIONAL   TRUST  AND   SAVINGS   ASSOCIATION,   as
         documentation  agent for the Banks;  and ABN, as syndication  agent for
         the Banks; and

                  (5) BANKBOSTON,  N.A., THE BANK OF NOVA SCOTIA, FLEET NATIONAL
         BANK, and THE INDUSTRIAL BANK OF JAPAN,  LIMITED,  as co-agents for the
         Banks.


                                    RECITALS

         A.  Borrower  has  requested  that the  Banks  provide  certain  credit
facilities to Borrower on an unsecured basis.

         B. The Banks are  willing to provide  such credit  facilities  upon the
terms and subject to the conditions set forth herein.


                                    AGREEMENT

         NOW,  THEREFORE,  in consideration of the above Recitals and the mutual
covenants herein contained, the parties hereto hereby agree as follows:

SECTION I.   INTERPRETATION.

         1.01. Definitions.  Unless otherwise indicated in this Agreement or any
other Credit Document, each term set forth below, when used in this Agreement or
any other Credit Document,  shall have the respective meaning given to that term
below or in

<PAGE>

the provision of this Agreement or other Credit Document referenced below:

                  "ABN" shall have the meaning  given to that term in clause (3)
         of the introductory paragraph hereof.

                  "Administrative  Agent"  shall have the meaning  given to that
         term in clause (4) of the introductory paragraph hereof.

                  "Administrative  Agent's  Fee  Letter"  shall  mean the letter
         agreement  dated  the  date  of this  Agreement  between  Borrower  and
         Administrative Agent.

                  "Affiliate"  shall mean, with respect to any Person,  (a) each
         Person  that,  directly  or  indirectly,   owns  or  controls,  whether
         beneficially or as a trustee,  guardian or other fiduciary, ten percent
         (10%) or more of the Equity  Securities  of such Person  having  voting
         power,  (b) each Person that  controls,  is  controlled  by or is under
         common  control with such Person or any Affiliate of such Person or (c)
         each of such Person's officers and directors;  provided,  however, that
         in no case  shall  any  Agent or any  Bank  Party  be  deemed  to be an
         Affiliate of Borrower,  any of Borrower's  Subsidiaries  or MKE-Quantum
         for  purposes of this  Agreement.  For the purpose of this  definition,
         "control"  of  a  Person  shall  mean  the   possession,   directly  or
         indirectly,  of the  power to  direct  or cause  the  direction  of its
         management  or  policies,  whether  through  the  ownership  of  voting
         securities, by contract or otherwise.

                  "Agents"   shall  mean   Administrative   Agent  and  the  Co-
         Arrangers.

                  "Agents' Fee Letters"  shall mean the  Administrative  Agent's
         Fee Letter and the Co-Arrangers' Fee Letter.

                  "Agreement" shall mean this Credit Agreement.

                  "Applicable  Lending  Office" shall mean,  with respect to any
         Bank, (a) initially,  its office  designated as such in Schedule I (or,
         in the case of any Bank which becomes a Bank by an assignment  pursuant
         to  Subparagraph   8.05(c),  its  office  designated  as  such  in  the
         applicable  Assignment  Agreement)  and (b)  subsequently,  such  other
         office or offices as such Bank may designate to Administrative Agent as
         the office at which such  Bank's  Revolving  Loans will  thereafter  be
         maintained  and for the account of which all payments of principal  of,
         and interest on, such Bank's Revolving Loans will thereafter be made.

                                        2
<PAGE>

                  "Applicable Margin" shall mean, with respect to any LIBOR Loan
         at any time,  the per annum margin which is determined  pursuant to the
         Pricing Grid and added to the LIBO Rate for such LIBOR Loan;  provided,
         however, that each Applicable Margin determined pursuant to the Pricing
         Grid shall be increased by two percent (2.00%) (a) on the date an Event
         of Default of the type referred to in Subparagraph 6.01(a),  6.01(f) or
         6.01(g)  occurs  and  (b) on the  date  Administrative  Agent  provides
         written  notice to Borrower of the  occurrence  of any Event of Default
         other than of the type referred to in Subparagraph 6.01(a),  6.01(f) or
         6.01(g),  and in each case shall continue at such increased rate unless
         and until  such  Event of  Default  is waived in  accordance  with this
         Agreement.  The  Applicable  Margins shall be determined as provided in
         the Pricing Grid and may change for each Pricing Period.

                  "Assignee  Bank" shall have the meaning  given to that term in
         Subparagraph 8.05(c).

                  "Assignment"  shall  have the  meaning  given to that  term in
         Subparagraph 8.05(c).

                  "Assignment  Agreement"  shall have the meaning  given to that
         term in Subparagraph 8.05(c).

                  "Assignment  Effective  Date" shall have, with respect to each
         Assignment Agreement, the meaning set forth therein.

                  "Assignor  Bank" shall have the meaning  given to that term in
         Subparagraph 8.05(c).

                  "Attorney  Costs" of any  Person  shall mean and  include  all
         reasonable  fees and  disbursements  of any law firm or other  external
         counsel  for such  Person  and,  to the extent  such  services  are not
         redundant to those provided in the matter by external  counsel for such
         Person,   the  allocated  cost  of  internal  legal  services  and  all
         disbursements of internal counsel.

                  "Authorized  Financial  Officer"  shall mean,  with respect to
         Borrower,  the Chief Financial  Officer or Treasurer of Borrower or any
         Vice President of Finance of Borrower.

                  "Bank Parties" shall mean, collectively, the Banks and Issuing
         Bank. Unless otherwise indicated, the term "Bank Parties" shall include
         any Bank acting as Issuing Bank but not in its capacity as such.

                  "Banks"  shall have the  meaning  given to that term in clause
         (2) of the introductory paragraph hereof. Unless

                                        3
<PAGE>

         otherwise indicated,  the term "Banks" shall include any Bank acting as
         Issuing Bank but not in its capacity as such.

                  "Base  Rate" shall  mean,  on any day,  the greater of (a) the
         Prime  Rate in effect on such date and (b) the  Federal  Funds Rate for
         such day plus one-half percent  (0.50%);  provided,  however,  that the
         Base Rate shall be increased by two percent  (2.00%) (a) on the date an
         Event of  Default  of the type  referred  to in  Subparagraph  6.01(a),
         6.01(f) or  6.01(g)  occurs  and (b) on the date  Administrative  Agent
         provides  written  notice to Borrower of the occurrence of any Event of
         Default  other than of the type  referred to in  Subparagraph  6.01(a),
         6.01(f) or 6.01(g),  and in each case shall  continue at such increased
         rate  unless and until  such  Event of Default is waived in  accordance
         with this Agreement.

                  "Base Rate Loan" shall  mean,  at any time,  a Revolving  Loan
         which then bears  interest as  provided  in clause (i) of  Subparagraph
         2.01(c).

                  "Borrower" shall have the meaning given to that term in clause
         (1) of the introductory paragraph hereof.

                  "Borrowing"  shall mean a borrowing by Borrower  consisting of
         the  Revolving  Loans made by each of the Banks on the same date and of
         the same Type pursuant to a single Notice of Borrowing.

                  "Business  Day"  shall mean any day other  than  Saturday  and
         Sunday on which (a) commercial  banks are not authorized or required to
         close in San  Francisco,  California  or New York,  New York and (b) if
         such  Business Day is related to a Revolving  Loan which bears or is to
         bear  interest  based on a LIBO Rate,  dealings in Dollar  deposits are
         carried  out in the  London or other  applicable  interbank  eurodollar
         market.

                  "Capital Adequacy Requirement" shall have the meaning given to
         that term in Subparagraph 2.10(d).

                  "Capital  Leases"  shall  mean any and all  lease  obligations
         that, in accordance  with GAAP,  are required to be  capitalized on the
         books of a lessee.

                  "Cash   Equivalents"   shall  mean  Investments  of  the  type
         permitted  pursuant  to clauses  (i)  through  (iv),  (vi),  (viii) and
         (xviii) in Subparagraph 5.02(e).

                  "Change of Control"  shall mean with respect to Borrower,  the
         occurrence of any of the following  events:  (i) any person or group of
         persons  (within  the  meaning of  Section  13 or 14 of the  Securities
         Exchange Act of 1934, as

                                        4
<PAGE>

         amended) shall (A) acquire beneficial  ownership (within the meaning of
         Rule 13d-3 promulgated by the Securities and Exchange  Commission under
         the Securities Exchange Act of 1934, as amended) of forty percent (40%)
         or more of the outstanding  Equity  Securities of Borrower  entitled to
         vote for  members  of the board of  directors,  or (B)  acquire  all or
         substantially all of the assets of Borrower and its Subsidiaries  taken
         as a whole,  or (ii)  during  any period of  fifteen  (15)  consecutive
         calendar months, individuals who are directors of Borrower on the first
         day of such period ("Initial  Directors") and any directors of Borrower
         who  are  specifically  approved  by  two-thirds  of the  directors  of
         Borrower  who are Initial  Directors  or  previously-approved  Approved
         Directors  ("Approved  Directors") shall cease to constitute a majority
         of the Board of Directors of Borrower before the end of such period.

                  "Change of Law" shall have the  meaning  given to that term in
         Subparagraph 2.10(b).

                  "CIBC" shall have the meaning given to that term in clause (3)
         of the introductory paragraph hereof.

                  "Closing Date" shall mean the date when the initial  Revolving
         Loan is made or the initial Letter of Credit is issued.

                  "Co-Arrangers"  shall have the  meaning  given to that term in
         clause (3) of the introductory paragraph hereof.

                  "Co-Arrangers'  Fee  Letter"  shall mean the letter  agreement
         dated the date of this Agreement among Borrower and the Co-Arrangers.

                  "Code"  shall  mean the  Internal  Revenue  Code of  1986,  as
         amended from time to time.

                  "Commitment" shall mean, with respect to any Bank at any time,
         such Lender's  Proportionate Share at such time of the Total Commitment
         at such time.

                  "Commitment  Fee  Percentage"  shall mean, with respect to the
         Unused  Commitment  at any time,  a per annum rate which is  determined
         pursuant to the Pricing Grid.

                  "Commitment Fees" shall have the meaning given to that term in
         Subparagraph 2.04(c).

                  "Compliance  Certificate" shall have the meaning given to that
         term in Subparagraph 5.01(a).

                                        5
<PAGE>

                  "Contingent Obligation" shall mean, with respect to any Person
         without  duplication,  (a) any Guaranty  Obligation of that Person; and
         (b) any direct or indirect monetary obligation or liability, contingent
         or otherwise,  of that Person (i) in respect of any letter of credit or
         similar instrument issued for the account of that Person or as to which
         that Person is otherwise liable for reimbursement of drawings,  (ii) to
         purchase any  materials,  supplies or other property from, or to obtain
         the  services  of,  another  Person if the  relevant  contract or other
         related   document  or  obligation   requires  that  payment  for  such
         materials,  supplies or other property, or for such services,  shall be
         made  regardless  of whether  delivery of such  materials,  supplies or
         other  property is ever made or  tendered,  or such  services  are ever
         performed  or tendered if and to the extent  such  obligations  are not
         designated  as  accounts  payable in  accordance  with  GAAP,  or (iii)
         incurred pursuant to any interest rate swap, cap or collar  agreements,
         interest rate future or option  contracts,  currency  swap  agreements,
         currency  future  or  option  contracts  or  other  similar  agreements
         relating to interest rates or currencies.  The amount of any Contingent
         Obligation  shall be deemed equal to the  liability in respect  thereof
         reasonably anticipated in accordance with GAAP.

                  "Contractual   Obligation"  of  any  Person  shall  mean,  any
         indenture,  note,  lease,  loan  agreement,  security,  deed of  trust,
         mortgage, security agreement, guaranty, instrument, contract, agreement
         or other form of  contractual  obligation or  undertaking to which such
         Person is a party or by which  such  Person or any of its  property  is
         bound.

                  "Convertible   Subordinated  Debentures"  shall  mean  the  5%
         Convertible  Subordinated  Notes  due  2003 in the  original  principal
         amount of  $241,350,000  issued by Borrower  pursuant to the  Indenture
         dated  February 15, 1996 between  Borrower and LaSalle  National  Trust
         Company, N.A., as Trustee.

                  "Credit  Documents" shall mean and include the Loan Documents;
         all documents, instruments and agreements delivered to any Agent or any
         Bank  Party  pursuant  to  Paragraph  3.01;  and all  other  documents,
         instruments  and  agreements  delivered  by  Borrower  or  any  of  its
         Subsidiaries  to any  Agent  or Bank  Party  in  connection  with  this
         Agreement on or after the date of this Agreement.

                  "Credit  Event" shall mean the making of any  Revolving  Loan,
         the issuance of any Letter of Credit or any  amendment of any Letter of
         Credit  which  increases  its stated  amount or extends its  expiration
         date.

                                        6
<PAGE>
                  "Default"  shall  have  the  meaning  given  to  that  term in
         Paragraph 6.01.

                  "Defaulting  Bank"  shall mean a Bank which has failed to fund
         its  portion of any  Borrowing  which it is required to fund under this
         Agreement and has continued in such failure for three (3) Business Days
         after written notice from Administrative Agent.

                  "Disclosure  Letter"  shall mean the letter  from  Borrower to
         Administrative   Agent,  dated  the  date  of  this  Agreement,   which
         identifies itself as the "Disclosure Letter" under this Agreement.

                  "Dollars" and "$" shall mean the lawful currency of the United
         States of America.

                  "Domestic  Subsidiary" shall mean, with respect to any Person,
         any  Subsidiary  of such Person  which is created or  organized  in the
         United  States or under the laws of the  United  States or any state of
         the United States.

                  "Drawing Payment" shall have the meaning given to that term in
         Subparagraph 2.02(c).

                  "EBITDA"  shall  mean,  with  respect  to any  Person  for any
         period, the sum of the following, determined on a consolidated basis in
         accordance with GAAP where applicable:

                           (a) The net income or net loss of such Person and its
                  Subsidiaries  for such  period  before  provision  for  income
                  taxes;

                                      plus

                           (b) The sum (to the extent  deducted  in  calculating
                  net income or loss in clause  (a)  above) of (i) all  Interest
                  Expenses of such Person and its  Subsidiaries  accruing during
                  such period and (ii) all depreciation and amortization of such
                  Person and its Subsidiaries accruing during such period.

                  "Employee  Benefit Plan" shall mean any employee  benefit plan
         within the meaning of section 3(3) of ERISA  maintained or  contributed
         to by Borrower or any ERISA Affiliate, other than a Multiemployer Plan.

                  "Environmental  Laws"  shall  mean  all  Requirements  of  Law
         relating  to the  protection  of  human  health  and  the  environment,
         including,  without limitation,  all Requirements of Law, pertaining to
         reporting, licensing,  permitting,  transportation,  storage, disposal,
         investigation, and

                                        7
<PAGE>

         remediation of emissions,  discharges, releases, or threatened releases
         of hazardous materials, chemical substances, pollutants,  contaminants,
         or hazardous or toxic substances,  materials or wastes,  whether solid,
         liquid, or gaseous in nature, into the air, surface water, groundwater,
         or land, or relating to the manufacture, processing, distribution, use,
         treatment,  storage,  disposal,  transport,  or  handling  of  chemical
         substances, pollutants, contaminants, or hazardous or toxic substances,
         materials, or wastes, whether solid, liquid, or gaseous in nature.

                  "Equity  Securities"  of any Person  shall mean (a) all common
         stock, preferred stock,  participations,  shares, partnership interests
         or other equity interests in such Person  (regardless of how designated
         and whether or not voting or non-voting) and (b) all warrants,  options
         and  other  rights  to  acquire  any  of  the  foregoing,   other  than
         convertible  debt securities  which have not been converted into common
         stock, preferred stock,  participations,  shares, partnership interests
         or other equity interests in any such Person.

                  "ERISA" shall mean the Employee Retirement Income Security Act
         of 1974, as the same may from time to time be amended or  supplemented,
         including any rules or regulations issued in connection therewith.

                  "ERISA  Affiliate" shall mean any Person which is treated as a
         single employer with Borrower under Section 414 of the Code.

                  "Event of Default"  shall have the meaning  given to that term
         in Paragraph 6.01.

                  "Executive Officer" shall mean, with respect to Borrower,  the
         Chairman, Chief Executive Officer, Chief Operating Officer,  President,
         Chief Financial Officer,  Treasurer,  General Counsel or Vice President
         of  Corporate  Development  and  Planning of  Borrower or any  division
         President or Executive  Vice  President of Borrower  (or, if the titles
         are changed, the persons having similar responsibilities for Borrower).

                  "External LC Agreement"  shall mean the Credit Agreement dated
         as of September 22, 1995 among Borrower, The Sumitomo Bank, Limited and
         other banks from time to time parties thereto (as amended, modified and
         supplemented  from time to time in accordance with this Agreement),  or
         such other agreement  between or among Borrower and any other financial
         institution  or financial  institutions  pursuant to which Borrower may
         incur Indebtedness under letters of credit of

                                        8
<PAGE>

         the type permitted under clause (vi) of Subparagraph 5.01(a).

                  "Federal  Funds  Rate" shall  mean,  for any day,  the Federal
         funds  effective  rate as set forth in the weekly  statistical  release
         designated  as H.15(519)  published by the Federal  Reserve Bank of New
         York for such day, or in any successor publication (or, if such rate is
         not so published for any day, the average rate quoted to Administrative
         Agent on and for  such  day by  three  (3)  Federal  funds  brokers  of
         recognized standing selected by Administrative Agent).

                  "Federal  Reserve  Board" shall mean the Board of Governors of
         the Federal Reserve System.

                  "Financial   Statements"  shall  mean,  with  respect  to  any
         accounting  period for any Person,  consolidated  statements of income,
         shareholders' equity and cash flows of such Person for such period, and
         a balance  sheet of such Person as of the end of such  period,  setting
         forth in each case in  comparative  form figures for the  corresponding
         period in the preceding  fiscal year if such period is less than a full
         fiscal  year or, if such period is a full  fiscal  year,  corresponding
         figures from the  preceding  annual  audit,  all prepared in reasonable
         detail and in accordance with GAAP.

                  "Funded Debt" of any Person shall mean,  without  duplication,
         Indebtedness  of  the  type  set  forth  in  clauses  (a) - (f)  of the
         definition  of  "Indebtedness"  less Cash or Cash  Equivalents  used as
         collateral to secure any such Indebtedness.

                  "Funding  Losses" shall mean,  with respect to any  repayment,
         prepayment  or  conversion of any LIBOR Loan as set forth in clause (a)
         of Paragraph 2.12, any failure to borrow any LIBOR Loan as set forth in
         clause (b) of  Paragraph  2.12 or any failure to convert into any LIBOR
         Loan as set forth in clause (c) of Paragraph  2.12,  the amount  (which
         shall not be less than zero) computed in accordance  with the following
         formula:

                  Funding Losses = (R-T) x P x D
                                   --------------
                                        360

                  where R =         the  interest  rate  that was or would  have
                                    been applicable to such LIBOR Loan;

                        T =         the   LIBO   Rate   for  the  date  of  such
                                    repayment,  prepayment,  conversion, failure
                                    to  borrow or  failure  to  convert  for new
                                    LIBOR Loans,  of the same  principal  amount
                                    made for an  assumed  Interest  Period  (the
                                    "Remaining Period")

                                        9
<PAGE>
                                    which begins on the date of such  repayment,
                                    prepayment, conversion, failure to borrow or
                                    failure to convert  and ends on the last day
                                    of the actual  Interest  Period  that was or
                                    would have been applicable to the LIBOR Loan
                                    that was  repaid,  prepaid or  converted  or
                                    that was not borrowed or converted;

                        P =         the principal amount of the LIBOR Loan  that
                                    was repaid, prepaid or converted or that was
                                    not borrowed or converted; and

                        D =         the number of days in the Remaining Period.

                  "GAAP" shall mean generally accepted accounting principles and
         practices  as in effect in the United  States of  America  from time to
         time, consistently applied.

                  "Governmental  Authority"  shall mean any  domestic or foreign
         national, state or local government, any political subdivision thereof,
         any department, agency, authority or bureau of any of the foregoing, or
         any  other  entity   exercising   executive,   legislative,   judicial,
         regulatory or administrative  functions of or pertaining to government,
         including,   without   limitation,   the  Federal   Deposit   Insurance
         Corporation,   the  Federal  Reserve  Board,  the  Comptroller  of  the
         Currency, any central bank or any comparable authority.

                  "Governmental Charges" shall mean, with respect to any Person,
         all levies,  assessments,  fees, claims or other charges imposed by any
         Governmental  Authority  upon  such  Person or any of its  property  or
         otherwise payable by such Person.

                  "Governmental  Rule"  shall  mean any law,  rule,  regulation,
         ordinance,  order, code interpretation,  judgment,  decree,  directive,
         guidelines,  policy or similar  form of  decision  of any  Governmental
         Authority.

                  "Guaranty  Obligation" shall mean, with respect to any Person,
         any direct or indirect  liability  of that  Person with  respect to any
         indebtedness,  lease,  dividend,  letter of credit or other  obligation
         (the "primary  obligations") of another Person (the "primary obligor"),
         including any obligation of that Person, whether or not contingent, (a)
         to purchase,  repurchase or otherwise acquire such primary  obligations
         or any property  constituting direct or indirect security therefor,  or
         (b) to advance or provide funds (i) for the payment or discharge of any
         such primary obligation,  or (ii) to maintain working capital or equity
         capital of the primary  obligor or  otherwise to maintain the net worth
         or solvency or any balance sheet item, level of


                                       10
<PAGE>

         income  or  financial  condition  of  the  primary  obligor,  or (c) to
         purchase property,  securities or services primarily for the purpose of
         assuring the owner of any such primary obligation of the ability of the
         primary obligor to make payment of such primary  obligation  (except to
         the extent of the fair market  value of such  property,  securities  or
         services to be purchased),  or (d) otherwise to assure or hold harmless
         the  holder of any such  primary  obligation  against  loss in  respect
         thereof. The amount of any Guaranty Obligation shall be deemed equal to
         the liability in respect thereof reasonably anticipated under GAAP.

                  "Hazardous Materials" shall mean all materials, substances and
         wastes which are  classified  or regulated as  "hazardous,"  "toxic" or
         similar   descriptions   under  any  Environmental  Law  or  which  are
         hazardous, toxic, harmful or dangerous to human health.

                  "Indebtedness" of any Person shall mean,  without  duplication
         (in each case, measured in accordance with GAAP):

                           (a) All monetary obligations of such Person evidenced
                  by notes,  bonds,  debentures or other similar instruments and
                  all other obligations of such Person for borrowed money;

                           (b) All monetary  obligations  of such Person for the
                  deferred  purchase  price of property  or services  (including
                  obligations   under   letters  of  credit  and  other   credit
                  facilities  which secured or financed  such  purchase  price),
                  other  than  trade  payables  incurred  by such  Person in the
                  ordinary course of its business on ordinary terms;

                           (c) All  monetary  obligations  of such Person  under
                  conditional  sale or other  title  retention  agreements  with
                  respect  to  property  acquired  by  such  Person  other  than
                  pursuant to leases  classified as operating  leases under GAAP
                  (to the extent of the value of such property if the rights and
                  remedies of the seller or lender  under such  agreement in the
                  event of default are limited solely to repossession or sale of
                  such property);

                           (d) All monetary obligations of such Person as lessee
                  with respect to the  capitalized  portion of Capital Leases of
                  such Person (other than  capitalized  interest)  calculated in
                  accordance with GAAP;

                           (e) all monetary  obligations  of such Person  (other
                  than inchoate indemnity obligations) with

                                       11
<PAGE>
                  respect to any Synthetic Leases;  provided,  however, that the
                  amount of monetary  obligations for the purpose of this clause
                  (e) shall be equal to the aggregate present value of scheduled
                  rental payments under each such Synthetic Lease (excluding any
                  component thereof in the nature of operating  expenses,  taxes
                  or similar  obligations),  together  with the  purchase  price
                  payable  by such  Person at the end of such  Synthetic  Lease,
                  discounted  by the interest  rate  implicit in such  Synthetic
                  Lease;

                           (f) all monetary  obligations  of such Person  (other
                  than inchoate indemnity obligations) with respect to any sale,
                  transfer  or  assignment  of accounts  receivable  and related
                  rights and  property  by such  Person  with  recourse  to such
                  Person;

                           (g)  All   monetary   obligations   of  such  Person,
                  contingent or  otherwise,  under or with respect to letters of
                  credit, banker's acceptances or other similar facilities;

                           (h)  All   monetary   obligations   of  such  Person,
                  contingent  or  otherwise,  under or with  respect to interest
                  rate swap, cap or collar  agreements,  interest rate future or
                  option contracts, currency swap agreements, currency future or
                  option  contracts  or other  similar  agreements  relating  to
                  interest rates or currencies;

                           (i) All  Contingent  Obligations  of such Person with
                  respect to the  obligations of such Person or other Persons of
                  the types described in clauses (a) - (h) above; and

                           (j) All  obligations  of other  Persons  of the types
                  described in clauses (a) - (h) above to the extent  secured by
                  (or for which any holder of such  obligations  has an existing
                  right,  contingent or otherwise, to be secured by) any Lien in
                  any property (including accounts and contract rights) owned by
                  such Person, even though such person has not assumed or become
                  liable for the payment of such obligations; provided, however,
                  that the amount of such  Indebtedness  under  this  clause (j)
                  shall  be the  lesser  of (i) the  fair  market  value  of the
                  property  subject  to such  Lien and (ii)  the  amount  of the
                  monetary obligations of such other Person.

                  "Interest  Account"  shall have the meaning given to that term
         in Subparagraph 2.07(b).

                                       12
<PAGE>
                  "Interest Expenses" shall mean, with respect to any Person for
         any period,  the sum,  determined on a consolidated basis in accordance
         with GAAP,  of (a) all interest  accruing on the  indebtedness  of such
         Person during such period (including  interest  attributable to Capital
         Leases and financing  charges  attributable to Synthetic Leases whether
         calculated as interest expenses or rental expenses),  (b) all letter of
         credit fees payable by such Person  accruing during such period and (c)
         interest or discount associated with Permitted  Receivables  Facilities
         not otherwise included in clause (a) above.

                  "Interest  Period" shall mean, with respect to any LIBOR Loan,
         the time periods selected by Borrower pursuant to Subparagraph  2.01(b)
         or  Subparagraph  2.01(d)  which  commences  on the  first  day of such
         Revolving  Loan or the effective date of any conversion and ends on the
         last day of such time period,  and  thereafter,  each  subsequent  time
         period  selected by Borrower  pursuant to  Subparagraph  2.01(e)  which
         commences on the last day of the immediately  preceding time period and
         ends on the last day of that time period.

                  "Investment"  of any Person  shall mean any loan or advance of
         funds by such  Person to any  other  Person  (other  than  advances  to
         employees  of such  Person  for moving  and  travel  expenses,  drawing
         accounts and similar expenditures in the ordinary course of business or
         the  purchase  by such  Person in the  ordinary  course of  business of
         residences  for  employees in  connection  with the  relocation by such
         Person of such  employees),  any purchase or other  acquisition  of any
         Equity  Securities or  Indebtedness  of any other  Person,  any capital
         contribution  by such Person to or any other  investment by such Person
         in any other Person (including any Guaranty  Obligations of such Person
         and any Indebtedness of such Person of the type described in clause (j)
         of the  definition of  "Indebtedness"  on behalf of any other  Person);
         provided,  however,  that  Investments  shall not include (a)  accounts
         receivable or other indebtedness owed by customers of such Person which
         are current assets and arose from sales of inventory or the performance
         of services in the  ordinary  course of such  Person's  business or (b)
         prepaid  expenses of such Person  incurred  and prepaid in the ordinary
         course of business.

                  "Issuing  Bank" shall mean a Bank  selected  by  Borrower  and
         approved  by  Administrative   Agent  and  the  Co-Arrangers  in  their
         reasonable  discretion that has agreed to act as issuing bank hereunder
         and issue one or more Letters of Credit pursuant to Paragraph 2.02.

                  "LC Application"  shall have the meaning given to that term in
         Subparagraph 2.02(b).

                                       13
<PAGE>
                  "LC  Availability  Date"  shall  mean the day on or after  the
         Closing  Date that an Issuing  Bank has been  selected by Borrower  and
         approved by  Administrative  Agent and the Co-  Arrangers in accordance
         with this Agreement.

                  "LC  Commitment"  shall have the meaning given to that term in
         Subparagraph 2.02(a).

                  "LC Facility  Expiration Date" shall have the meaning given to
         that term in Subparagraph 2.02(a).

                  "LC Issuance  Fees" shall have the meaning  given to that term
         in Subparagraph 2.04(d).

                  "LC Usage Fee" shall  have the  meaning  given to that term in
         Subparagraph 2.04(d).

                  "LC Usage Fee Rate"  shall  mean,  with  respect to Letters of
         Credit, the per annum rate which is determined  pursuant to the Pricing
         Grid and used to calculate the LC Usage Fee.

                  "Letter of Credit"  shall have the meaning  given to that term
         in Subparagraph 2.02(a).

                  "LIBO Rate" shall mean,  with respect to any  Interest  Period
         for the LIBOR  Loans in any  Borrowing,  a rate per annum  equal to the
         quotient of (a) the arithmetic mean (rounded upward if necessary to the
         nearest  1/16 of one  percent) of the rates per annum  appearing on the
         Reuters screen LIBO page (or any successor  publication)  on the second
         Business Day prior to the first day of such Interest Period at or about
         11:00  A.M.  (London  time)  (for  delivery  on the  first  day of such
         Interest Period) for a term comparable to such Interest Period, divided
         by (b) one minus the Reserve  Requirement  for such Revolving  Loans in
         effect from time to time.  If for any reason rates are not available as
         provided in clause (a) of the preceding  sentence,  the rate to be used
         in clause (a) shall be, at the Administrative  Agent's discretion,  (i)
         the  rate per  annum  at  which  Dollar  deposits  are  offered  to the
         Administrative Agent in the London interbank eurodollar currency market
         or  (ii)  the  rate  at  which  Dollar  deposits  are  offered  to  the
         Administrative  Agent in, or by the Administrative Agent to major banks
         in,  any  offshore   interbank   eurodollar   market  selected  by  the
         Administrative  Agent, in each case on the second Business Day prior to
         the  commencement  of such Interest  Period at or about 10:00 A.M. (New
         York time) (for delivery on the first day of such Interest  Period) for
         a  term   comparable  to  such   Interest   Period  and  in  an  amount
         approximately  equal to the amount of the Revolving  Loan to be made or
         funded by the Administrative Agent as part of such Borrowing.

                                       14
<PAGE>

                  "LIBOR Loan" shall mean,  at any time, a Revolving  Loan which
         then bears interest as provided in clause (ii) of Subparagraph 2.01(c).

                  "Lien" shall mean, with respect to any property,  any security
         interest,  mortgage,  pledge,  lien or other  encumbrance in, of, or on
         such property or the income therefrom,  including,  without limitation,
         the interest of a vendor or lessor under a conditional  sale agreement,
         Capital Lease or other title retention agreement.

                  "Loan  Documents"  shall mean this Agreement,  the Notes,  the
         Agents' Fee Letter, the LC Applications, each Notice of Borrowing, each
         Compliance  Certificate  and each additional  certificate  delivered by
         Borrower or any of its  Subsidiaries  from time to time pursuant to the
         terms of this Agreement or any such other Loan Documents.

                  "Majority  Banks" shall mean (a) at any time  Revolving  Loans
         are  outstanding  and the Banks are obligated to make  Revolving  Loans
         pursuant  to their  Commitments,  Banks  holding  more  than  fifty-one
         percent (51%) of the aggregate  principal amount of all Revolving Loans
         outstanding, calculated as if Revolving Loans in the full amount of the
         Banks'  Commitments were  outstanding,  (b) at any time Revolving Loans
         are outstanding and the Banks are not obligated to make Revolving Loans
         pursuant  to their  Commitments,  Banks  holding  more  than  fifty-one
         percent (51%) of the aggregate  principal amount of all Revolving Loans
         outstanding  and (c) at any time no  Revolving  Loans are  outstanding,
         Banks whose aggregate Commitments exceed fifty-one percent (51%) of the
         Total Commitment at such time.

                  "Margin  Stock"  shall have the meaning  given to that term in
         Regulation U issued by the Federal  Reserve Board, as amended from time
         to time, and any successor regulation thereto.

                  "Material Adverse Effect" shall mean a material adverse effect
         on (a) the business, assets, operations or financial or other condition
         of Borrower and its  Subsidiaries  taken as a whole; (b) the ability of
         Borrower to pay or perform the Obligations in accordance with the terms
         of this Agreement and the other Credit Documents; or (c) the rights and
         remedies of the Agents and the Bank Parties under this Agreement or any
         other Credit Documents taken as a whole.

                  "Material Subsidiaries" shall mean each Subsidiary of Borrower
         which has assets with a total book value greater than ten percent (10%)
         of the consolidated total assets of Borrower and its Subsidiaries, each
         determined as of the end

                                       15
<PAGE>

         of the fiscal quarter immediately preceding the date of determination.

                  "Maturity"  shall mean,  with respect to any  Revolving  Loan,
         Reimbursement  Obligation,  interest,  fee or other  amount  payable by
         Borrower under this Agreement or the other Credit  Documents,  the date
         such Revolving Loan, interest,  Reimbursement Obligation,  fee or other
         amount becomes due,  whether upon the stated maturity or due date, upon
         acceleration or otherwise.

                  "Maturity  Date" shall have the meaning  given to that term in
         Subparagraph 2.01(a).

                  "MKE" shall mean  Matsushita-Kotobuki  Electronics Industries,
         Ltd., a Japanese corporation.

                  "MKE-Quantum"  shall mean  MKE-Quantum  Components,  L.L.C., a
         Delaware limited liability company.

                  "Moody's"  means  Moody's  Investors  Service,  Inc.  and  any
         successor thereto that is a nationally-recognized rating agency.

                  "Multiemployer  Plan" shall mean any multiemployer plan within
         the meaning of section 3(37) of ERISA  maintained or  contributed to by
         Borrower or any ERISA Affiliate.

                  "Net Proceeds" shall mean with respect to any sale or issuance
         of any Equity  Security or other  security by any Person  (including in
         the case of Borrower,  any sale or issuance of any Subordinated  Debt),
         the aggregate  consideration  received by such Person from such sale or
         issuance  less the  actual  amount of fees and  commissions  payable to
         Persons other than such Person or any Affiliate of such Person.

                  "Note"   shall  have  the  meaning   given  to  that  term  in
         Subparagraph 2.07(a).

                  "Notice of  Borrowing"  shall have the  meaning  given to that
         term in Subparagraph 2.01(b).

                  "Notice of  Conversion"  shall have the meaning  given to that
         term in Subparagraph 2.01(d).

                  "Notice of Interest Period  Selection"  shall have the meaning
         given to that term in Subparagraph 2.01(e).

                  "Obligations"   shall  mean  and  include,   with  respect  to
         Borrower, all loans,  advances,  debts,  liabilities,  and obligations,
         howsoever arising, owed by Borrower to any

                                       16
<PAGE>

         Agent or any Bank Party of every kind and  description  (whether or not
         evidenced by any note or instrument  and whether or not for the payment
         of money), direct or indirect, absolute or contingent, due or to become
         due, now existing or  hereafter  arising  pursuant to the terms of this
         Agreement  or any of the  other  Credit  Documents,  including  without
         limitation all interest, fees, charges,  expenses,  attorneys' fees and
         accountants'  fees  chargeable  to  Borrower  or  payable  by  Borrower
         hereunder or thereunder.

                  "Origination  Fees" shall have the meaning  given to that term
         in Subparagraph 2.04(b).

                  "Outstanding  Facilities  Credit" shall have the meaning given
         to that term in Subparagraph 2.03(a).

                  "Participant"  shall  have the  meaning  given to that term in
         Subparagraph 8.05(b).

                  "PBGC" shall mean the Pension Benefit Guaranty Corporation, or
         any successor thereto.

                  "Permitted  Indebtedness" shall have the meaning given to that
         term in Subparagraph 5.02(a).

                  "Permitted  Investments"  shall have the meaning given to that
         term in Subparagraph 5.02(e).

                  "Permitted Liens" shall have the meaning given to that term in
         Subparagraph 5.02(b).

                  "Permitted  Receivables  Facility"  shall  mean  one  or  more
         accounts receivable  financing  arrangements  including (a) the sale of
         accounts receivables and any related property by Borrower and/or any of
         its  Subsidiaries to a financing  party or a special  purpose  vehicle,
         and/or (b) the granting of a security  interest in accounts  receivable
         and any related  property by Borrower  and/or any of its  Subsidiaries;
         provided,  however,  that the aggregate outstanding advances under such
         accounts   receivables   financing   arrangements   shall  not   exceed
         $200,000,000 at any one time.

                  "Person" shall mean and include an individual,  a partnership,
         a  corporation  (including  a  business  trust),  a  limited  liability
         company, a joint stock company, an unincorporated  association, a joint
         venture, a trust or other entity or a Governmental Authority.

                  "Pricing Grid" shall mean Schedule II.

                  "Pricing  Period" shall mean (a) the period  commencing on the
         date of this Agreement and ending on September 30,

                                       17

<PAGE>

         1997,  (b) the  period  commencing  on  October  1, 1997 and  ending on
         November 30,  1997,  and  (c)  each  consecutive  three-calendar  month
         period,  four-calendar  month  period,  two-calendar  month  period  or
         three-calendar month period (as applicable)  thereafter which commences
         on  the  day  following  the  last  day of  the  immediately  preceding
         three-calendar month period,  four-calendar month period,  two-calendar
         month period or three-calendar month period (as applicable) and ends on
         the last day of that time period as follows:

                           (i)  December 1st through  February  28th or February
                  29th (as applicable);

                           (ii) March 1st through June 30th;

                           (iii) July 1st through August 31st; and

                           (iv) September 1st through November 30th.

                  "Prime Rate" shall mean the per annum rate publicly  announced
         by the  Administrative  Agent from time to time at its New York Branch.
         The Prime Rate is determined by the  Administrative  Agent from time to
         time as a means of pricing  credit  extensions to some customers and is
         neither  directly  tied to any  external  rate of interest or index nor
         necessarily the lowest rate of interest  charged by the  Administrative
         Agent at any given time for any particular class of customers or credit
         extensions.  Any change in the Base Rate resulting from a change in the
         Prime Rate shall  become  effective  on the  Business Day on which each
         change in the Prime Rate occurs.

                  "Prior  Credit  Agreement"  shall  have  that  certain  Credit
         Agreement, dated as of October 4, 1994, as amended, among Borrower, the
         banks  named  therein,  ABN,  Barclays  Bank PLC and CIBC,  as managing
         agents  for the banks,  and  Canadian  Imperial  Bank of  Commerce,  as
         administrative agent for the banks.

                  "Proportionate  Share" shall mean,  with respect to each Bank,
         the  percentage  set forth  under  the  caption  "Proportionate  Share"
         opposite  such  Bank's  name  on  Schedule  I,  or,  if  changed,  such
         percentage as may be set forth for such Bank in the Register.

                  "Quick  Ratio"  shall  mean,  with  respect to Borrower at any
         time, the ratio,  determined on a consolidated basis in accordance with
         GAAP, of:

                           (a) The sum at such  time of all (i)  cash  and  Cash
                  Equivalents  of  Borrower  and  its  Subsidiaries   (excluding
                  restricted cash) and (ii) accounts receivable of

                                       18
<PAGE>

                  Borrower and its Subsidiaries, less all reserves therefor;

                                       to

                           (b)  The  sum  at  such  time  of  (i)  the   current
                  liabilities  of  Borrower  and  its  Subsidiaries   plus  (ii)
                  long-term  Indebtedness  secured  by  account  receivables  of
                  Borrower  or its  Subsidiaries  measured  at the lesser of the
                  amount of such  long-term  Indebtedness  and the book value of
                  the accounts receivable so encumbered.

                  "Register"  shall  have  the  meaning  given  to that  term in
         Subparagraph 8.05(d).

                  "Reimbursement  Obligation"  shall have the  meaning  given to
         that term in Subparagraph 2.02(c).

                  "Reimbursement  Payment"  shall have the meaning given to that
         term in Subparagraph 2.02(c).

                  "Reportable  Event" shall have the meaning  given to that term
         in ERISA and applicable regulations thereunder.

                  "Requirement  of Law"  applicable to any Person shall mean (a)
         the Articles or Certificate of Incorporation  and By-laws,  Partnership
         Agreement,  Operating  Agreement or other  organizational  or governing
         documents of such Person,  (b) any Governmental  Rule binding upon such
         Person,  (c) any  license,  permit,  approval  or  other  authorization
         granted by any  Governmental  Authority  to or for the  benefit of such
         Person or (d) any final  judgment,  decision  or  determination  of any
         Governmental  Authority or  arbitrator,  in each case  applicable to or
         binding upon such Person or any of its property or to which such Person
         or any of its property is subject.

                  "Reserve  Requirement"  shall mean, with respect to any day in
         an  Interest  Period for a LIBOR  Loan,  the  aggregate  of the reserve
         requirement  rates  (expressed  as a decimal) in effect on such day for
         eurocurrency   funding   (currently   referred   to  as   "Eurocurrency
         liabilities" in Regulation D of the Federal  Reserve Board)  maintained
         by a member bank of the Federal  Reserve  System.  As used herein,  the
         term "reserve  requirement"  shall  include,  without  limitation,  any
         basic,  supplemental or emergency reserve  requirements imposed on Bank
         by any Governmental Authority.

                  "Revolving  Loan" shall have the meaning given to that term in
         Subparagraph 2.01(a).

                                       19
<PAGE>

                  "S&P" means Standard & Poor's Ratings Services,  a division of
         The McGraw-Hill  Companies,  Inc., and any successor  thereto that is a
         nationally-recognized rating agency.

                  "Senior  Funded Debt" of any Person shall mean any Funded Debt
         which is not Subordinated Debt.

                  "Senior  Funded Debt Ratio"  shall mean,  with  respect to any
         Person at any time, the ratio,  determined on a  consolidated  basis in
         accordance with GAAP, of:

                           (a) The total  Senior  Funded Debt of such Person and
                  its Subsidiaries at such time;

                                       to

                           (b)  The sum at such  time  of (i) the  total  Senior
                  Funded  Debt  and  Subordinated  Debt of such  Person  and its
                  Subsidiaries  at such time plus  (ii) the total  Tangible  Net
                  Worth of such Person and its Subsidiaries at such time.

                  "Senior  Indebtedness"  shall mean, with respect to any Person
         at any time, all  Indebtedness  of such Person other than  Subordinated
         Debt.

                  "Solvent"  shall mean, with respect to any Person on any date,
         that on such date (a) the fair  value of the  assets of such  Person is
         greater  than the fair  value of the  liabilities  (including,  without
         limitation,  contingent  liabilities) of such Person,  as such value is
         established and  liabilities  evaluated for purposes of Section 101(31)
         of the  Federal  Bankruptcy  Reform Act of 1978 (12 U.S.C.  ss.101,  et
         seq.)  and,  in the  alternative,  the  California  Uniform  Fraudulent
         Transfer  Act, (b) such Person does not intend to, and does not believe
         that it will,  incur debts or liabilities  beyond such Person's ability
         to pay as such debts and liabilities  mature and (c) such Person is not
         engaged in  business  or a  transaction,  and is not about to engage in
         business  or a  transaction,  for which such  Person's  property  would
         constitute an unreasonably small capital.

                  "Subordinated  Debt" shall mean the  Convertible  Subordinated
         Debentures and any other  subordinated  debt permitted by  Subparagraph
         5.02(a).

                  "Subsidiary"  of any Person shall mean (a) any  corporation of
         which  50% or more of the  issued  and  outstanding  Equity  Securities
         having  ordinary  voting  power to  elect a  majority  of the  Board of
         Directors  of such  corporation  (irrespective  of  whether at the time
         capital

                                       20
<PAGE>
         stock of any other class or classes of such corporation  shall or might
         have voting power upon the  occurrence  of any  contingency)  is at the
         time directly or indirectly owned or controlled by such Person, by such
         Person and one or more of its other  Subsidiaries  or by one or more of
         such Person's other Subsidiaries or (b) any partnership, joint venture,
         or other association of which 50% or more of the equity interest having
         the  power  to  vote,   direct  or  control  the   management  of  such
         partnership,  joint venture or other  association  is at the time owned
         and  controlled  by such Person,  by such Person and one or more of the
         other   Subsidiaries   or  by  one  or  more  of  such  Person's  other
         Subsidiaries  and in each case,  only if such Person is included in the
         Financial Statements of such Person on a consolidated basis.

                  "Synthetic  Lease" shall mean an off-balance  sheet  financing
         arrangement  for  equipment  or real  estate  which  is  treated  as an
         operating  lease  under GAAP but  pursuant  to which the lessee of such
         equipment  or real estate has the  benefits and burdens of ownership of
         the leased equipment or real estate for U.S. tax purposes.

                  "Tangible Net Worth" shall mean,  with respect to Borrower and
         its Subsidiaries at any time, the remainder at such time, determined on
         a consolidated  basis in accordance  with GAAP, of (a) the total assets
         of Borrower and its Subsidiaries minus (b) the sum (without  limitation
         and without  duplication of deductions) of (i) the total liabilities of
         Borrower  and  its  Subsidiaries,  (ii)  all  reserves  established  by
         Borrower and its Subsidiaries  for anticipated  losses and expenses (to
         the extent  not  deducted  in  calculating  total  assets in clause (a)
         above),   and  (iii)  all   intangible   assets  of  Borrower  and  its
         Subsidiaries  (to the extent  included in  calculating  total assets in
         clause (a) above), including,  without limitation,  goodwill (including
         any amounts, however designated on the balance sheet,  representing the
         cost  of  acquisition  of  businesses  and  investments  in  excess  of
         underlying tangible assets),  trademarks,  trademark rights, trade name
         rights, copyrights,  patents, patent rights, licenses, unamortized debt
         discount,  marketing  expenses,  organizational  expenses,  non-compete
         agreements and deferred research and development.

                  "Taxes"   shall  have  the  meaning  given  to  such  term  in
         Subparagraph 2.11(a).

                  "Total  Commitment"  shall have the meaning given to that term
         in Subparagraph 2.01(a).

                  "Total  Funded  Debt  Ratio"  shall  mean,   with  respect  to
         Borrower, as of the last day of any quarter, the ratio,

                                       21
<PAGE>
         determined on a consolidated  basis in accordance with GAAP, of (a) the
         aggregate  amount of all Funded Debt of Borrower  then  outstanding  on
         such day to (b) EBITDA of Borrower  for the  consecutive  four  quarter
         period ending on such day.

                  "Transfers"   shall  mean,  with  respect  to  any  assets  or
         property, any sale, lease, transfer or other disposition thereof.

                  "Type"  shall  mean,  with  respect to any  Revolving  Loan or
         Borrowing at any time,  the  classification  of such  Revolving Loan or
         Borrowing  by the  type of  interest  rate it then  bears,  whether  an
         interest rate based on the Base Rate or the LIBO Rate.

                  "UCP"   shall  have  the   meaning   given  to  that  term  in
         Subparagraph 2.02(a).

                  "Unused  Commitment"  shall  mean,  at  any  time  after  this
         Agreement is executed by Borrower,  the Agents and Banks, the remainder
         of (a) the  Total  Commitment  at such  time  minus  (b) the sum of the
         aggregate  principal amount of all Revolving Loans then outstanding and
         the aggregate stated amount of all Letters of Credit then outstanding.

                  "Wholly-Owned  Subsidiary"  shall mean any Subsidiary in which
         (other than directors' qualifying or local ownership shares required by
         law) 100% of the issued and  outstanding  Equity  Securities  or equity
         interest  (as  applicable)  having  ordinary  voting  power  to elect a
         majority  of the Board of  Directors  of such  Subsidiary  or direct or
         control the  management of such  Subsidiary  (as  applicable) is at the
         time owned and  controlled by a Person,  by such Person and one or more
         of the  other  Subsidiaries  or by one or more of such  Person's  other
         Subsidiaries.

         1.02. GAAP.  Unless otherwise  indicated in this Agreement or any other
Credit Document, all accounting terms used in this Agreement or any other Credit
Document  shall be construed,  and all  accounting  and  financial  computations
hereunder or  thereunder  shall be computed,  in  accordance  with GAAP. If GAAP
changes in any material  respect during the term of this Agreement such that any
covenants  contained  herein would then be calculated  in a different  manner or
with different components,  Borrower, the Banks and Agents agree to negotiate in
good faith to amend this  Agreement in such respects as are necessary to conform
those  covenants as criteria for evaluating  Borrower's  financial  condition to
substantially  the same criteria as were effective prior to such change in GAAP;
provided,  however,  that,  until  Borrower,  the Banks and Agents so amend this
Agreement,  all such covenants shall be calculated in accordance with GAAP as in
effect immediately prior to such change.

                                       22
<PAGE>

         1.03. Headings. Headings in this Agreement and each of the other Credit
Documents  are for  convenience  of  reference  only  and  are  not  part of the
substance hereof or thereof.

         1.04.  Plural Terms.  All terms defined in this  Agreement or any other
Credit Document in the singular form shall have comparable meanings when used in
the plural form and vice versa.

         1.05.  Time.  All  references  in this  Agreement and each of the other
Credit  Documents  to a time of day shall  mean New York time  unless  otherwise
indicated.

         1.06.  Governing  Law.  This  Agreement  and each of the  other  Credit
Documents  (unless  otherwise  provided in such other Credit Documents) shall be
governed by and construed in accordance with the laws of the State of California
without reference to conflicts of law rules.

         1.07. Construction. This Agreement is the result of negotiations among,
and has been reviewed by,  Borrower,  each Bank, each Agent and their respective
counsel.  Accordingly,  this Agreement  shall be deemed to be the product of all
parties  hereto,  and no  ambiguity  shall be  construed  in favor of or against
Borrower, any Bank or any Agent.

         1.08.  Entire  Agreement.  This Agreement,  the Agents' Fee Letters and
each of the other Credit Documents,  taken together,  constitute and contain the
entire  agreement of Borrower,  the Banks and Agents and  supersede  any and all
prior   agreements,    negotiations,    correspondence,    understandings    and
communications  among the  parties,  whether  written  or oral,  respecting  the
subject matter hereof.

         1.09.  Calculation of Interest and Fees. All  calculations  of interest
and fees under this Agreement and the other Credit  Documents for any period (a)
shall  include  the first day of such  period and  exclude  the last day of such
period and (b) shall be calculated on the basis of a year of 360 days for actual
days elapsed,  except that during any period any Revolving  Loan bears  interest
based upon the Base Rate,  such  interest  shall be calculated on the basis of a
year of 365 or 366 days, as appropriate, for actual days elapsed.

         1.10. Other  Interpretive  Provisions.  References in this Agreement to
"Recitals,"   "Sections,"   "Paragraphs,"    "Subparagraphs,"   "Exhibits"   and
"Schedules" are to recitals, sections, paragraphs,  subparagraphs,  exhibits and
schedules  herein and hereto  unless  otherwise  indicated.  References  in this
Agreement and each of the other Credit Documents to any document,  instrument or
agreement  (a) shall  include  all  exhibits,  schedules  and other  attachments
thereto,  (b) shall include all documents,  instruments or agreements  issued or
executed in replacement

                                       23
<PAGE>

thereof  and  (c)  shall  mean  such  document,   instrument  or  agreement,  or
replacement or predecessor  thereto, as amended,  modified and supplemented from
time to time and in effect at any given time. The words  "hereof,"  "herein" and
"hereunder" and words of similar import when used in this Agreement or any other
Credit Document shall refer to this Agreement or such other Credit Document,  as
the  case  may  be,  as a  whole  and not to any  particular  provision  of this
Agreement or such other Credit Document, as the case may be. The words "include"
and  "including"  and words of similar import when used in this Agreement or any
other Credit Document shall not be construed to be limiting or exclusive. In the
event of any inconsistency  between the terms of this Agreement and the terms of
any other Credit Document, the terms of this Agreement shall govern.


SECTION II.    CREDIT FACILITIES.

         2.01. Revolving Loan Facility.

                  (a)  Revolving  Loan  Availability.  Subject  to the terms and
         conditions of this  Agreement  (including  the amount  limitations  set
         forth in  Paragraph  2.03),  each Bank  severally  agrees to advance to
         Borrower  from time to time during the period  beginning on the Closing
         Date and ending on June 6, 2000 (the  "Maturity  Date") such  revolving
         loans as Borrower may request under this Paragraph 2.01  (individually,
         a  "Revolving  Loan");  provided,   however,  that  (i)  the  aggregate
         principal  amount of all Revolving  Loans made by such Bank at any time
         outstanding  shall not exceed such Bank's  Commitment  at such time and
         (ii) the aggregate  principal amount of all Revolving Loans made by all
         Banks at any time  outstanding  shall not exceed Five  Hundred  Million
         Dollars  ($500,000,000)  (such  amount,  as  reduced  from time to time
         pursuant  to this  Agreement,  to be  referred  to herein as the "Total
         Commitment").  All Revolving Loans shall be made on a pro rata basis by
         the Banks in accordance  with their  respective  Proportionate  Shares,
         with each  Borrowing to be  comprised of a Revolving  Loan by each Bank
         equal to such Bank's  Proportionate Share of such Borrowing.  Except as
         otherwise  provided  herein,  Borrower  may borrow,  repay and reborrow
         Revolving Loans until the Maturity Date.

                  (b) Notice of Borrowing. Borrower shall request each Borrowing
         by delivering to Administrative  Agent an irrevocable written notice in
         the  form  of  Exhibit  A,   appropriately   completed  (a  "Notice  of
         Borrowing"), which specifies, among other things:

                           (i) The principal amount of the requested  Borrowing,
                  which shall be in the amount of (A)  $1,000,000 or an integral
                  multiple of $500,000 in


                                       24
<PAGE>

                  excess  thereof in the case of a Borrowing  consisting of Base
                  Rate  Loans or (B)  $10,000,000  or an  integral  multiple  of
                  $500,000  in  excess  thereof  in  the  case  of  a  Borrowing
                  consisting of LIBOR Loans;

                           (ii) Whether the requested Borrowing is to consist of
                  Base Rate Loans or LIBOR Loans;

                           (iii) If the  requested  Borrowing  is to  consist of
                  LIBOR Loans,  the initial Interest Period selected by Borrower
                  for such LIBOR Loans in accordance with Subparagraph  2.01(e);
                  and

                           (iv) The date of the requested Borrowing, which shall
                  be a Business Day.

         Borrower shall give each Notice of Borrowing to Administrative Agent at
         least  three  (3)  Business  Days  before  the  date  of the  requested
         Borrowing in the case of a Borrowing  consisting  of LIBOR Loans and at
         least one (1) Business Day before the date of the  requested  Borrowing
         in the case of a Borrowing  consisting of Base Rate Loans.  Each Notice
         of Borrowing  shall be delivered  by  first-class  mail or facsimile to
         Administrative  Agent at the office or facsimile  number and during the
         hours specified in Paragraph  8.01;  provided,  however,  that Borrower
         shall  promptly  deliver to  Administrative  Agent the  original of any
         Notice of  Borrowing  initially  delivered by  facsimile.  Borrower may
         request  that  one  or  more  Borrowings  be  made  on  the  same  day.
         Administrative Agent shall promptly notify each Bank of the contents of
         each  Notice  of  Borrowing  and of the  amount  and Type of  (and,  if
         applicable,  the Interest Period for) each Revolving Loan to be made by
         such Bank as part of the requested Borrowing.

                  (c) Interest Rates.  Borrower shall pay interest on the unpaid
         principal amount of each Revolving Loan from the date of such Revolving
         Loan until the  maturity  thereof,  at one of the  following  rates per
         annum:

                           (i) During such periods as such  Revolving  Loan is a
                  Base Rate  Loan,  at a rate per annum  equal to the Base Rate,
                  such rate to change  from time to time as the Base Rate  shall
                  change; and

                           (ii) During such periods as such  Revolving Loan is a
                  LIBOR Loan, at a rate per annum equal at all times during each
                  Interest  Period for such LIBOR Loan to the LIBO Rate for such
                  Interest Period plus the Applicable Margin therefor, such rate
                  to change from time to time during such Interest Period as the
                  Applicable Margin shall change;

                                       25
<PAGE>

         Provided,  however,  that all Revolving  Loans  outstanding  during the
         period  commencing  on the Closing  Date and ending  three (3) Business
         Days after the  Closing  Date shall be Base Rate Loans.  All  Revolving
         Loans in each  Borrowing  shall,  at any given time prior to  maturity,
         bear  interest at one, and only one, of the above rates.  The number of
         Borrowings  consisting  of LIBOR Loans shall not exceed  twenty (20) at
         any time.

                  (d)  Conversion of Revolving  Loans.  Borrower may convert any
         Borrowing from one Type of Borrowing to the other Type.  Borrower shall
         request  such  a  conversion  by  an  irrevocable   written  notice  to
         Administrative Agent in the form of Exhibit B, appropriately  completed
         (a "Notice of Conversion"), which specifies, among other things:

                           (i) The Borrowing which is to be converted;

                           (ii) The Type of  Revolving  Loans  into  which  such
                  Revolving Loans are to be converted;

                           (iii) If such  Borrowing  is to be  converted  into a
                  Borrowing  consisting  of LIBOR  Loans,  the initial  Interest
                  Period  selected  by  Borrower  for  such  Revolving  Loans in
                  accordance with Subparagraph 2.01(e); and

                           (iv)  The  date of the  requested  conversion,  which
                  shall be a Business Day.

         Borrower shall give each Notice of Conversion to  Administrative  Agent
         at least  three (3)  Business  Days  before  the date of the  requested
         conversion in the case of a conversion into a Revolving Loan consisting
         of LIBOR Loans.  If Borrower fails to give such Notice of Conversion at
         least  three  (3)  Business  Days  before  the  date  of the  requested
         conversion,  such  Revolving  Loan shall  automatically  convert into a
         Revolving Loan consisting of Base Rate Loans. Each Notice of Conversion
         shall be delivered by first-class  mail or facsimile to  Administrative
         Agent at the  office or to the  facsimile  number  and during the hours
         specified in Paragraph  8.01;  provided,  however,  that Borrower shall
         promptly deliver to Administrative  Agent the original of any Notice of
         Conversion initially delivered by facsimile. Administrative Agent shall
         promptly notify each Bank of the contents of each Notice of Conversion.

                  (e)  LIBOR Loan Interest Periods.

                           (i) The initial and each  subsequent  Interest Period
                  selected  by Borrower  for a LIBOR Loan shall be one (1),  two
                  (2),  three (3) or six (6)  months as  Borrower  may  specify;
                  provided, however, that (A) any

                                       26
<PAGE>
                  Interest  Period which would  otherwise  end on a day which is
                  not a Business  Day shall be extended  to the next  succeeding
                  Business  Day unless such next  Business  Day falls in another
                  calendar  month,  in which case such Interest Period shall end
                  on the  immediately  preceding  Business Day; (B) any Interest
                  Period  which  begins on the last  Business  Day of a calendar
                  month  (or  on  a  day  for  which  there  is  no  numerically
                  corresponding  day in the  calendar  month  at the end of such
                  Interest  Period)  shall  end on the  last  Business  Day of a
                  calendar month; and (C) no Interest Period shall end after the
                  Maturity Date.

                           (ii) Borrower shall notify Administrative Agent by an
                  irrevocable   written   notice  in  the  form  of  Exhibit  C,
                  appropriately   completed   (a  "Notice  of  Interest   Period
                  Selection"),  at least  three (3)  Business  Days prior to the
                  last  day of each  Interest  Period  for  LIBOR  Loans  of the
                  Interest  Period  selected by Borrower for the next succeeding
                  Interest  Period  for such  Revolving  Loans.  Each  Notice of
                  Interest Period  Selection shall be given by first-class  mail
                  or facsimile to the office or the facsimile  number and during
                  the hours specified in Paragraph 8.01; provided, however, that
                  Borrower shall promptly  deliver to  Administrative  Agent the
                  original of any Notice of Interest Period Selection  initially
                  delivered   by   facsimile.   If  Borrower   fails  to  notify
                  Administrative  Agent of the next  Interest  Period  for LIBOR
                  Loans in accordance with this Subparagraph 2.01(e), such LIBOR
                  Loans  shall  automatically  convert to Base Rate Loans on the
                  last day of the current Interest Period therefor.

                  (f) Scheduled  Revolving Loan  Payments.  Borrower shall repay
         the unpaid  principal  amount of all  Revolving  Loans on the  Maturity
         Date.  Borrower  shall pay  accrued  interest  on the unpaid  principal
         amount of the  Revolving  Loans in arrears (i) in the case of Base Rate
         Loans, on the last Business Day in each calendar  quarter;  (ii) in the
         case of LIBOR Loans,  on the last day of each Interest  Period therefor
         (and,  if any such  Interest  Period is longer  than three (3)  months,
         every three (3) months  after the first day of such  Interest  Period);
         and (iii) in the case of all Revolving Loans, at maturity.

                  (g) Purpose.  Borrower shall use the proceeds of the Revolving
         Loans (i) to  refinance  the loans  outstanding  under the Prior Credit
         Agreement  on the Closing Date and (ii) to finance  Borrower's  working
         capital and general corporate needs.

                                       27
<PAGE>

         2.02. Letter of Credit Facility.

                  (a)  Letter of Credit  Availability.  Subject to the terms and
         conditions of this  Agreement  (including  the amount  limitations  set
         forth in Paragraph 2.03, Issuing Bank shall issue on behalf of Borrower
         from time to time during the period  beginning  on the LC  Availability
         Date and  ending on the date  which is  fifteen  (15) days prior to the
         Maturity  Date (the "LC  Facility  Expiration  Date")  such  letters of
         credit as Borrower may request under this Paragraph 2.02 (individually,
         a "Letter of Credit"); provided, however, as follows:

                           (i) The aggregate  amount available for drawing under
                  all Letters of Credit at any time outstanding shall not exceed
                  One Hundred Million Dollars  ($100,000,000)  (such amount,  as
                  reduced from time to time  pursuant to this  Agreement,  to be
                  referred to herein as the "LC Commitment").

                           (ii) Each  Letter of Credit  shall be an  irrevocable
                  performance standby Letter of Credit.

                           (iii) Each Letter of Credit  shall expire on or prior
                  to the LC Facility Expiration Date.

                           (iv) Each  Letter of Credit  shall be governed by the
                  Uniform Customs and Practices for Documentary  Credits as most
                  recently  published by the  International  Chamber of Commerce
                  (the  "UCP")  prior to the date of  issuance of such Letter of
                  Credit  and the terms of the UCP are  hereby  incorporated  by
                  reference with respect to each Letter of Credit.

                           (v)  Each  Letter  of  Credit  shall  be  in  a  form
                  reasonably acceptable to Issuing Bank.

         Except as otherwise  provided  herein,  Borrower may request Letters of
         Credit,  cause or  allow  Letters  of  Credit  to  expire  and  request
         additional Letters of Credit until the LC Facility Expiration Date.

                  (b) LC  Application.  Borrower  shall  request  each Letter of
         Credit  by  delivering  to  Administrative  Agent and  Issuing  Bank an
         irrevocable  written  application  in a form  reasonably  acceptable to
         Issuing  Bank (it being  understood  that such form  shall not  contain
         terms  inconsistent  with  the  terms  set  forth  in this  Agreement),
         appropriately completed (an "LC Application"),  which specifies,  among
         other things:

                           (i) The  stated  amount  of the  requested  Letter of
                  Credit;

                                       28
<PAGE>
                           (ii) The name and address of the  beneficiary  of the
                  requested Letter of Credit;

                           (iii) The expiration date of the requested  Letter of
                  Credit;

                           (iv) The documentary conditions for drawing under the
                  requested Letter of Credit;

                           (v) The date of issuance for the requested  Letter of
                  Credit, which shall be a Business Day; and

                           (vi) The aggregate amount available for drawing under
                  all Letters of Credit then outstanding.

         Borrower  shall give each LC  Application to Issuing Bank at least five
         (5) Business Days before the proposed date of issuance of the requested
         Letter  of  Credit.  Each  LC  Application  shall  be  delivered  by an
         established  express courier service,  first-class mail or facsimile to
         Administrative  Agent and Issuing Bank at their  respective  offices or
         facsimile  numbers and during the hours  specified in  Paragraph  8.01;
         provided, however, that Borrower shall promptly deliver to Issuing Bank
         the original of any LC  Application  initially  delivered by facsimile.
         Administrative Agent shall promptly notify each Bank of the contents of
         each LC Application.  In the event of any conflict between the terms of
         this Agreement and the terms of any LC  Application,  the terms of this
         Agreement shall control.

                  (c)  Disbursement and Reimbursement.

                           (i)  Disbursement.  Issuing Bank will notify Borrower
                  by facsimile  forthwith upon receipt of the presentment of any
                  demand for payment  under any Letter of Credit,  together with
                  notice of the amount of such payment and the date such payment
                  shall be made.  Subject  to the terms and  provisions  of such
                  Letter of Credit,  Issuing  Bank  shall  make such  payment (a
                  "Drawing Payment") to the appropriate beneficiary.

                           (ii) Time of Reimbursement. Not later than 11:00 a.m.
                  on the day each Drawing Payment is to be made by Issuing Bank,
                  Borrower  shall  make or  cause to be made to  Issuing  Bank a
                  payment   in  the   amount   of  such   Drawing   Payment   (a
                  "Reimbursement  Payment");  provided,  however,  that Borrower
                  shall  make  such  Reimbursement  Payment  to,  or cause  such
                  Reimbursement  Payment to be made to, Administrative Agent for
                  the  benefit  of  the  Banks  if,   prior  to  the  time  such
                  Reimbursement  Payment  is made,  Issuing  Bank  has  notified
                  Borrower that it has

                                       29
<PAGE>

                  requested  the Banks  pursuant to clause (ii) of  Subparagraph
                  2.02(d) to pay to Issuing Bank their respective  Proportionate
                  Shares of the Drawing  Payment  made by Issuing  Bank.  If any
                  such  Reimbursement  Payment is made to Administrative  Agent,
                  Administrative Agent shall promptly pay to each Bank which has
                  paid its  Proportionate  Share of the  Drawing  Payment,  such
                  Bank's  Proportionate  Share of the Reimbursement  Payment and
                  shall  promptly  pay to  Issuing  Bank  the  balance  of  such
                  Reimbursement Payment.

                           (iii)   Reimbursement    Obligation   Absolute.   The
                  obligation of Borrower to reimburse Issuing Bank or the Banks,
                  as the case may be, for Drawing  Payments (such  obligation to
                  be  referred  to  herein   collectively  as  a  "Reimbursement
                  Obligation") shall be absolute, unconditional and irrevocable,
                  and shall be performed  strictly in accordance  with the terms
                  of  this   Agreement   under   and   without   regard  to  any
                  circumstances,  including,  without limitation (A) any lack of
                  validity or enforceability of any of the Credit Documents, (B)
                  the  existence  of any claim,  setoff,  defense or other right
                  which Borrower may have at any time against any beneficiary or
                  any  transferee  of any Letter of Credit (or any  Persons  for
                  whom  any  such  beneficiary  or  transferee  may be  acting),
                  Issuing Bank,  any Agent,  any Bank Party or any other Person,
                  whether in connection  with this Agreement,  the  transactions
                  contemplated  herein or in the other Credit  Documents,  or in
                  any  unrelated  transaction,  (C) any  breach of  contract  or
                  dispute between Borrower, any beneficiary or any transferee of
                  any  Letter  of  Credit  (or any  Persons  for  whom  any such
                  beneficiary  or transferee  may be acting),  Issuing Bank, any
                  Agent,  any Bank Party or any other  Person,  (D) any  demand,
                  statement  or other  document  presented  under any  Letter of
                  Credit   proving   to  be  forged,   fraudulent,   invalid  or
                  insufficient  in any respect or any  statement  therein  being
                  untrue or  inaccurate  in any respect,  (E) payment by Issuing
                  Bank  under any  Letter of Credit  against  presentation  of a
                  demand for  payment  which  does not comply  with the terms of
                  such   Letter   of   Credit,   (F)  any   non-application   or
                  misapplication  by any  beneficiary  or any  transferee of any
                  Letter of Credit (or any Persons for whom any such beneficiary
                  or  transferee  may be acting) of the  proceeds of any drawing
                  under  such  Letter of Credit or (G) any delay,  extension  of
                  time, renewal,  compromise or other indulgence or modification
                  granted  or agreed to by Issuing  Bank,  any Agent or any Bank
                  Party, with or without notice to or approval by Borrower, with
                  respect  to  Borrower's  indebtedness  under  this  Agreement;
                  provided, that this Subparagraph 2.02(b)

                                       30
<PAGE>

                  shall not abrogate  any right which  Borrower may have to seek
                  to enjoin any drawing under any Letter of Credit or to recover
                  damages from Issuing Bank pursuant to Subparagraph 2.02(e).

                  (d)  Bank Participations; Revolving Loan Funding.

                           (i)  Participation  Agreement.  Each Bank  severally,
                  unconditionally  and  irrevocably  agrees with Issuing Bank to
                  participate  in the  extension  of  credit  arising  from  the
                  issuance of each  Letter of Credit in an amount  equal to such
                  Bank's Proportionate Share of the stated amount of such Letter
                  of Credit from time to time,  and the  issuance of each Letter
                  of Credit  shall be deemed a  confirmation  by Issuing Bank of
                  such participation in such amount.

                           (ii) Participation Funding.  Issuing Bank may request
                  the Banks to fund their participations in Letters of Credit by
                  paying  to  Issuing  Bank all or any  portion  of any  Drawing
                  Payment made or to be made by Issuing Bank under any Letter of
                  Credit.  Issuing Bank shall make such a request by  delivering
                  to Administrative Agent (with a copy to Borrower), at any time
                  after the drawing for which such payment is requested has been
                  made upon  Issuing  Bank,  a written  request for such payment
                  which  specifies  the amount of such  Drawing  Payment and the
                  date on which such Drawing  Payment is to be made or was made;
                  provided,  however,  that  Issuing  Bank shall not request the
                  Banks to make any payment under this  Subparagraph  2.02(d) in
                  connection  with any  portion of a Drawing  Payment  for which
                  Issuing Bank has been reimbursed from a Reimbursement  Payment
                  by  Borrower  unless  such  Reimbursement   Payment  has  been
                  thereafter  recovered by Borrower.  Administrative Agent shall
                  promptly notify each Bank of the contents of each such request
                  and of  such  Bank's  Proportionate  Share  of the  applicable
                  portion of such Drawing Payment. Promptly following receipt of
                  such notice from Administrative  Agent, each Bank shall pay to
                  Administrative  Agent,  for the benefit of Issuing Bank,  such
                  Bank's  Proportionate  Share of the applicable portion of such
                  Drawing Payment.

                           (iii) Funding  Through  Revolving  Loans. At any time
                  any Reimbursement Obligations are outstanding,  Administrative
                  Agent may or,  upon the  written  request of Issuing  Bank (if
                  Borrower is not then the subject of a bankruptcy  proceeding),
                  shall   (subject   to  the  terms  and   conditions   of  this
                  Subparagraph  2.02(d)),  initiate a Borrowing in an amount not
                  exceeding   the   aggregate   amount   of   such   outstanding
                  Reimbursement Obligations


                                       31
<PAGE>
                  and use the proceeds of such  Revolving Loan to repay all or a
                  portion  of  such  Reimbursement  Obligations.  Administrative
                  Agent shall  initiate  such a Borrowing by  delivering to each
                  Bank  (with  a  copy  to  Borrower)  a  written  notice  which
                  specifies the aggregate  amount of  outstanding  Reimbursement
                  Obligations,  the  amount of the  Borrowing,  the date of such
                  Borrowing and the amount of the  Revolving  Loan to be made by
                  such  Bank as part of such  Borrowing.  Each Bank  shall  make
                  available to  Administrative  Agent funds in the amount of its
                  Proportionate  Share of such  Revolving  Loan as  provided  in
                  Subparagraph   2.08(a).   After   receipt   of   such   funds,
                  Administrative  Agent shall  promptly  disburse  such funds to
                  Issuing Bank and the Banks, as appropriate,  in payment of the
                  outstanding Reimbursement Obligations.

                           (iv) Obligations Absolute. Each Bank's obligations to
                  fund its participations  under this Subparagraph 2.02(d) shall
                  be absolute,  unconditional  and  irrevocable and shall not be
                  affected by (A) the  occurrence or existence of any Default or
                  Event of Default, (B) any failure to satisfy any condition set
                  forth in Section III,  (C) any event or condition  which might
                  have a Material  Adverse Effect,  (D) the failure of any other
                  Bank to make any payment under this Subparagraph  2.02(d), (E)
                  any right of offset, abatement, withholding or reduction which
                  such Bank may have against Issuing Bank, any Agent,  any other
                  Bank  Party  or  Borrower,  (F)  any  event,  circumstance  or
                  condition set forth in  Subparagraph  2.02(c) or  Subparagraph
                  2.02(e),  or (G) any other  event,  circumstance  or condition
                  whatsoever,  whether or not  similar to any of the  foregoing;
                  provided,  that nothing in this Paragraph 2.02 shall prejudice
                  any right which any Bank may have against Issuing Bank for any
                  action by Issuing Bank which  constitutes  gross negligence or
                  willful misconduct.

                  (e) Liability of Issuing Bank, Etc.  Borrower agrees that none
         of  Issuing  Bank,  any Agent or any other Bank Party (nor any of their
         respective  directors,  officers  or  employees)  shall  be  liable  or
         responsible  for (i) the use which may be made of any  Letter of Credit
         or for any acts or omissions of any  beneficiary or transferee  thereof
         in connection  therewith;  (ii) any reference which may be made to this
         Agreement or to any Letter of Credit in any agreements,  instruments or
         other  documents  relating  to  obligations  secured by such  Letter of
         Credit; (iii) the validity, sufficiency or genuineness of documents, or
         of any  endorsement(s)  thereon,  even if such documents should in fact
         prove to be in any or all respects invalid, insufficient, fraudulent or
         forged or any statement therein

                                       32
<PAGE>

         prove to be  untrue  or  inaccurate  in any  respect  whatsoever;  (iv)
         payment by Issuing Bank against  presentation of documents which do not
         comply with the terms of any Letter of Credit, including failure of any
         documents to bear any reference or adequate  reference to any Letter of
         Credit; or (v) any other circumstances  whatsoever in making or failing
         to make  payment  under any Letter of Credit,  except only that Issuing
         Bank  shall be  liable to  Borrower  for acts or  events  described  in
         clauses (i) through (v) above,  to the extent,  but only to the extent,
         of any damages suffered by Borrower (excluding  consequential  damages)
         which  Borrower  proves  were  caused  by (A)  Issuing  Bank's  willful
         misconduct,  bad faith or gross  negligence  in  determining  whether a
         drawing  made  under any Letter of Credit  complies  with the terms and
         conditions  therefor  stated in such  Letter  of Credit or (B)  Issuing
         Bank's willful misconduct,  bad faith or gross negligence in failing to
         pay under  any  Letter of  Credit  after a drawing  by the  beneficiary
         thereof strictly complying with the terms and conditions of such Letter
         of Credit.  Without  limiting the foregoing,  Issuing Bank may accept a
         drawing that appears on its face to be in order, without responsibility
         for further  investigation.  The determination of whether a drawing has
         been made under any Letter of Credit prior to its expiration or whether
         a drawing  made under any Letter of Credit is in proper and  sufficient
         form  shall  be made by  Issuing  Bank in its  sole  discretion,  which
         determination  shall be  conclusive  and binding  upon  Borrower to the
         extent permitted by law.  Borrower hereby waives any right to object to
         any  payment  made under any Letter of Credit  with regard to a drawing
         that is in the form  provided in such Letter of Credit but which varies
         with  respect  to  punctuation,  capitalization,  spelling  or  similar
         matters of form.

                  (f)  Reports  of Issuing  Bank.  While any Letter of Credit is
         outstanding,   Issuing  Bank  shall  on  a  monthly  basis  provide  to
         Administrative Agent or any Bank such information regarding the Letters
         of Credit as Administrative  Agent or such Bank may reasonably request,
         including  the  Letters of Credit  outstanding,  the stated  amounts of
         outstanding  Letters of Credit,  the  expiration  dates of  outstanding
         Letters  of  Credit,  the  names of the  beneficiaries  of  outstanding
         Letters of Credit, the amounts of unpaid Reimbursement  Obligations and
         the amounts and times of Drawing Payments and Reimbursement Payments.

                  (g) Purpose.  Borrower  shall use the Letters of Credit solely
         as provided in clause (ii) of Subparagraph 2.02(a).

         2.03.  Amount Limitations, Commitment Reductions, Etc.

                                       33
<PAGE>

                  (a)  Total  Commitments.  The sum of the  aggregate  principal
         amount  of  all  Revolving  Loans  outstanding,  the  aggregate  amount
         available for drawing under all Letters of Credit then  outstanding and
         the aggregate amount of all Reimbursement  Obligations then outstanding
         (such  sum to be  referred  to herein  as the  "Outstanding  Facilities
         Credit") shall not exceed the Total Commitment at such time.

                  (b)  Optional   Reduction  or   Cancellation  of  Commitments.
         Borrower  may,   upon  three  (3)  Business  Days  written   notice  to
         Administrative Agent (and, in the case of the LC Commitment, to Issuing
         Bank),  permanently  reduce  the  Total  Commitment  by the  amount  of
         $5,000,000 or integral  multiples of  $1,000,000  in excess  thereof or
         cancel the Total Commitment in its entirety; provided, however, that:

                           (i) Borrower may not reduce the Total  Commitment if,
                  after  giving  effect  to  such  reduction,   the  Outstanding
                  Facilities  Credit  would  exceed the Total  Commitment  as so
                  reduced; and

                           (ii) Borrower may not cancel the Total Commitment if,
                  after giving effect to such  cancellation,  any Revolving Loan
                  or Letter of Credit would remain outstanding.

                  (c) Effect of Commitment  Reductions.  From the effective date
         of any reduction of the Total  Commitment,  the Commitment Fees payable
         pursuant to Subparagraph  2.04(c) shall be computed on the basis of the
         Total  Commitment as so reduced.  Any reduction of the Total Commitment
         pursuant to this Paragraph 2.03 shall be applied ratably to reduce each
         Bank's  Commitment  in  accordance  with  clause  (i)  of  Subparagraph
         2.09(a).

         2.04.  Fees.

                  (a) Agents' Fees.  Borrower shall pay to Agents, for their own
         accounts,  the fees in the  amounts  and at the  times set forth in the
         Agents' Fee Letters.

                  (b)  Origination  Fees.  Borrower shall pay to  Administrative
         Agent,  for the  ratable  benefit  of the  Banks  as  provided  in this
         Subparagraph 2.04(b),  nonrefundable origination fees (the "Origination
         Fees") in amounts equal to:

                           (i)  For  each  Bank  which   committed   to  provide
                  Commitments hereunder of Fifteen Million Dollars ($15,000,000)
                  or  more   but   less   than   Twenty-Five   Million   Dollars
                  ($25,000,000), seven point five one

                                       34
<PAGE>

                  hundredths  of one  percent  (.075%) of the sum of such Bank's
                  Commitment on the Closing Date;

                           (ii)  For  each  Bank  which   committed  to  provide
                  Commitments   hereunder   of   Twenty-Five   Million   Dollars
                  ($25,000,000)  or more but less  than  Forty  Million  Dollars
                  ($40,000,000), twelve point five one hundredths of one percent
                  (.125%) of the sum of such  Bank's  Commitment  on the Closing
                  Date; and

                           (iii)  For  each  Bank  which  committed  to  provide
                  Commitments  hereunder of Forty Million Dollars  ($40,000,000)
                  or more,  fifteen one hundredths of one percent (.150%) of the
                  sum of such Bank's Commitment on the Closing Date.

                  (c)  Commitment  Fees.  Borrower  shall pay to  Administrative
         Agent,  for the ratable  benefit of the Banks as provided in clause (v)
         of Subparagraph 2.09(a), nonrefundable commitment fees (the "Commitment
         Fees") equal to the  Commitment  Fee  Percentage  on the daily  average
         Unused  Commitment  for  the  period  beginning  on the  date  of  this
         Agreement  and  ending  on  the  Maturity   Date.  The  Commitment  Fee
         Percentage  shall be determined as provided in the Pricing Grid and may
         change for each Pricing Period.  Borrower shall pay the Commitment Fees
         quarterly  in  arrears  on  the  last  day  in  each  calendar  quarter
         (commencing  June 30, 1997) and on the  Maturity  Date (or if the Total
         Commitment  is cancelled on a date prior to the Maturity  Date, on such
         prior date).

                  (d)  Letter of Credit Fees.

                           (i) Letter of Credit Usage Fees.  Borrower  shall pay
                  to Administrative  Agent, for the ratable benefit of the Banks
                  as   provided   in  clause   (v)  of   Subparagraph   2.09(a),
                  nonrefundable  usage fees for the  Letters of Credit  (the "LC
                  Usage  Fees")  equal  to the LC Usage  Fee  Rate on the  daily
                  average  available  amount of each  Letter  of Credit  for the
                  period  beginning  on the date such Letter of Credit is issued
                  and ending on the date such Letter of Credit  expires.  The LC
                  Usage Fee Rate shall be  determined as provided in the Pricing
                  Grid and may change for each calendar quarter.  Borrower shall
                  pay the LC Usage Fees  quarterly in arrears on the last day in
                  each  calendar  quarter  (commencing  at the end of the  first
                  calendar  quarter after the issuance of the initial  Letter of
                  Credit) and on the Maturity Date.

                           (ii) Letter of Credit  Issuance Fees.  Borrower shall
                  either pay to  Administrative  Agent,  for the sole benefit of
                  Issuing Bank, or directly to Issuing Bank,


                                       35
<PAGE>

                  nonrefundable issuance fees for the Letters of Credit (the "LC
                  Issuance Fees") as agreed to between Borrower and Issuing Bank
                  (and,  if paid to  Administrative  Agent,  in such  amount  as
                  Administrative Agent has been notified by Issuing Bank is then
                  due).

                           (iii) Other Letter of Credit Fees. In addition to the
                  LC Issuance Fees,  Borrower shall either pay to Administrative
                  Agent,  for the sole benefit of Issuing  Bank,  or directly to
                  Issuing Bank,  other standard  reasonable fees of Issuing Bank
                  for drawings under,  transfers of and amendments to any Letter
                  of  Credit  and  other  administrative  actions  performed  by
                  Issuing Bank in connection with any Letter of Credit,  payable
                  at such  times  and in such  amounts  as are  consistent  with
                  Issuing  Bank's  standard  fee  policy  at the  time  of  such
                  amendment  or other  action  (and,  if paid to  Administrative
                  Agent,  in  such  amount  as  Administrative  Agent  has  been
                  notified by Issuing Bank is then due).

         2.05.   Prepayments.

                  (a)  Terms  of all  Prepayments.  Upon the  prepayment  of any
         Revolving Loan (whether such prepayment is an optional prepayment under
         Subparagraph  2.05(b), a mandatory  prepayment required by Subparagraph
         2.05(c) or a mandatory  prepayment  required by any other  provision of
         this  Agreement  or the  other  Credit  Documents,  including,  without
         limitation, a prepayment upon acceleration),  Borrower shall pay to the
         Administrative  Agent for the benefit of the Bank Party which made such
         Revolving  Loan (i) if such  prepayment  is the  prepayment  of a LIBOR
         Loan, all accrued interest to the date of such prepayment on the amount
         prepaid and (ii) if such  prepayment is the  prepayment of a LIBOR Loan
         on a day  other  than  the  last  day of an  Interest  Period  for such
         Revolving  Loan,  all  amounts  payable to such Bank Party  pursuant to
         Paragraph 2.12.

                  (b) Optional  Prepayments.  At its option,  Borrower may, upon
         three (3) Business Days notice to Administrative  Agent for LIBOR Loans
         and one (1) Business Day notice to  Administrative  Agent for Base Rate
         Loans,  prepay any Borrowing in part, in an aggregate  principal amount
         of $500,000 or more, or in whole.

                  (c) Mandatory  Prepayments.  If, at any time, the  Outstanding
         Facilities  Credit exceeds the Total Commitment at such time,  Borrower
         shall  immediately  prepay  Revolving  Loans in an aggregate  principal
         amount equal to such excess.

                  (d) Application of Revolving Loan Prepayments. All prepayments
         of the Revolving Loans shall, to the extent

                                       36
<PAGE>

         possible,  be first  applied to prepay Base Rate Loans and then, if any
         funds remain, to prepay LIBOR Loans.

         2.06.  Other Payment Terms.

                  (a) Place and Manner.  Except as otherwise  expressly provided
         herein,  Borrower  shall  make  all  payments  due to each  Bank  Party
         hereunder by payments to Administrative  Agent, for the account of such
         Bank  Party  and  such  Bank  Party's  Applicable  Lending  Office,  at
         Administrative  Agent's  office,  located at the address  specified  in
         Paragraph 8.01, in lawful money of the United States and in same day or
         immediately  available funds not later than 11:00 A.M. on the date due.
         Administrative  Agent shall  promptly  disburse to each Bank Party each
         such payment received by Administrative Agent for such Bank Party.

                  (b) Date. Whenever any payment due hereunder shall fall due on
         a day other than a Business Day, such payment shall be made on the next
         succeeding  Business Day, and such  extension of time shall be included
         in the computation of interest or fees, as the case may be.

                  (c)  Late  Payments.  If any  amounts  required  to be paid by
         Borrower under this Agreement or the other Credit Documents (including,
         without limitation, principal or interest payable on any Revolving Loan
         or interest  thereon,  any fees or other  amounts)  remain unpaid after
         such amounts are due,  Borrower  shall pay  interest on the  aggregate,
         outstanding  balance  of such  amounts  from the date due  until  those
         amounts  are paid in full at a per  annum  rate  equal to the Base Rate
         plus two percent (2.00%),  such rate to change from time to time as the
         Base Rate shall change.

                  (d) Application of Payments.  All payments  hereunder shall be
         applied  first to unpaid fees,  costs and expenses  then past due under
         this  Agreement  or the  other  Credit  Documents,  second  to  accrued
         interest then due and payable under this  Agreement or the other Credit
         Documents  and finally to reduce the  principal  amount of  outstanding
         Revolving Loans.

                  (e) Failure to Pay Administrative Agent. Unless Administrative
         Agent shall have  received  notice from  Borrower  prior to the date on
         which any payment is due to any Bank Parties  hereunder  that  Borrower
         will not make such  payment  in full,  Administrative  Agent may assume
         that Borrower has made such payment in full to Administrative  Agent on
         such  date  and  Administrative   Agent  may,  in  reliance  upon  such
         assumption,  cause to be distributed to the appropriate Bank Parties on
         such due date an amount equal to the amount then due such Bank Parties.
         If and to the extent

                                       37
<PAGE>
         Borrower shall not have so made such payment in full to  Administrative
         Agent,  each  such  Bank  Party  shall  repay to  Administrative  Agent
         forthwith on demand such amount distributed to such Bank Party together
         with  interest  thereon,  for each day from  the date  such  amount  is
         distributed  to such Bank Party  until the date such Bank Party  repays
         such amount to Administrative  Agent, at (i) the Federal Funds Rate for
         the  first  three  (3)  days  and (ii)  the  Base  Rate  thereafter.  A
         certificate of  Administrative  Agent  submitted to any Bank Party with
         respect to any amounts owing by such Bank Party under this Subparagraph
         2.06(e) shall be conclusive absent manifest error.

         2.07.  Notes and Interest Account.

                  (a) Notes.  The  obligation of Borrower to repay the Revolving
         Loans  made by each  Bank  and to pay  interest  thereon  at the  rates
         provided  herein shall be evidenced by a promissory note in the form of
         Exhibit D  (individually,  a "Note") which note shall be (i) payable to
         the order of such Bank,  (ii) in the amount of such Bank's  Commitment,
         (iii)  dated  the  Closing  Date  and  (iv)   otherwise   appropriately
         completed.  Borrower  authorizes  each Bank to  record on the  schedule
         annexed to such Bank's Note the date and amount of each  Revolving Loan
         made by such  Bank  and of each  payment  or  prepayment  of  principal
         thereon  made by  Borrower,  and agrees that all such  notations  shall
         constitute prima facie evidence of the matters noted.  Borrower further
         authorizes  each Bank to attach to and make a part of such  Bank's Note
         continuations of the schedule attached thereto as necessary.

                  (b) Interest Account. Borrower authorizes Administrative Agent
         to record in an account or accounts maintained by Administrative  Agent
         on its books (the "Interest Account") (i) the interest rates applicable
         to all Revolving Loans and the effective dates of all changes  thereto,
         (ii) the Interest Period for each LIBOR Loan, (iii) the date and amount
         of each principal and interest  payment on each Revolving Loan and (iv)
         such  other  information  as  Administrative  Agent  may  determine  is
         necessary  for  the   computation  of  interest   payable  by  Borrower
         hereunder.

         2.08.  Revolving Loan Funding, Etc.

                  (a) Bank  Funding  and  Disbursement  to  Borrower.  Each Bank
         shall, before 12:00 P.M. on the date of each Borrowing,  make available
         to  Administrative  Agent at its office specified in Paragraph 8.01, in
         same day or immediately  available funds, such Bank's pro rata share of
         such Borrowing. After Administrative Agent's receipt of such

                                       38
<PAGE>

         funds and upon  fulfillment of the  applicable  conditions set forth in
         Section III,  Administrative Agent will promptly disburse such funds in
         same day or immediately  available funds to Borrower.  Unless otherwise
         directed by Borrower,  Administrative Agent shall disburse the proceeds
         of each  Borrowing  to  Borrower  by  disbursement  to the  account  or
         accounts specified in the applicable Notice of Borrowing.

                  (b) Bank Failure to Fund.  Unless  Administrative  Agent shall
         have  received  notice  from a Bank prior to the date of any  Borrowing
         that such Bank will not make  available  to  Administrative  Agent such
         Bank's  pro rata  share of such  Borrowing,  Administrative  Agent  may
         assume that such Bank has made such portion available to Administrative
         Agent on the date of such  Borrowing in  accordance  with  Subparagraph
         2.08(a),   and   Administrative   Agent  may,  in  reliance  upon  such
         assumption,  make available to Borrower (or otherwise disburse) on such
         date a  corresponding  amount.  If any Bank does not make the amount of
         its pro rata share of any Borrowing  available to Administrative  Agent
         on or prior to the  date of such  Borrowing,  such  Bank  shall  pay to
         Administrative  Agent,  on demand,  interest which shall accrue on such
         amount until made available to  Administrative  Agent at rates equal to
         (i) the daily  Federal  Funds Rate  during the period  from the date of
         such  Borrowing  through the third Business Day thereafter and (ii) the
         Base Rate thereafter.  A certificate of Administrative  Agent submitted
         to any Bank with respect to any amounts  owing under this  Subparagraph
         2.08(b) shall be conclusive  absent  manifest  error. If any Bank's pro
         rata  share  of  any  Borrowing  is  not  in  fact  made  available  to
         Administrative  Agent by such Bank within three (3) Business Days after
         the date of such Borrowing, Borrower shall pay to Administrative Agent,
         on  demand,  an  amount  equal  to such pro rata  share  together  with
         interest  thereon,  for each day from  the date  such  amount  was made
         available  to  Borrower  until  the  date  such  amount  is  repaid  to
         Administrative  Agent,  at the interest rate  applicable at the time to
         the Revolving Loans comprising such Borrowing.

                  (c) Banks'  Obligations  Several.  The  failure of any Bank to
         make the Revolving Loan to be made by it as part of any Borrowing shall
         not  relieve  any other Bank of its  obligation  hereunder  to make its
         Revolving  Loan on the  date of such  Borrowing,  but no Bank  shall be
         responsible  for the  failure of any other  Bank to make the  Revolving
         Loan to be made by such other Bank on the date of any Borrowing.

         2.09.  Pro Rata Treatment.

                  (a)  Borrowings,   Commitment   Reductions,   Etc.  Except  as
         otherwise provided herein:

                                       39
<PAGE>

                           (i)  Each  Borrowing,  each  reduction  of the  Total
                  Commitment and  participations  in each Letter of Credit shall
                  be made by or shared  among the  Banks pro rata  according  to
                  their respective Proportionate Shares;

                           (ii) Each payment of principal of Revolving  Loans in
                  any  Borrowing  shall be shared  among the Banks which made or
                  funded  the  Revolving   Loans  in  such  Borrowing  pro  rata
                  according to the respective  unpaid principal  amounts of such
                  Revolving Loans so made or funded by such Banks;

                           (iii) Each payment of interest on Revolving  Loans in
                  any  Borrowing  shall be shared  among the Banks which made or
                  funded  the  Revolving   Loans  in  such  Borrowing  pro  rata
                  according to (A) the respective  unpaid  principal  amounts of
                  such  Revolving  Loans so made or funded by such Banks and (B)
                  the dates on which such Banks so made or funded such Revolving
                  Loans or is deemed to have made or funded such Revolving Loans
                  to  the  extent   such  Bank   otherwise   paid   interest  to
                  Administrative  Agent on such  Revolving  Loans in  accordance
                  with Subparagraph 2.08(b);

                           (iv) Each Reimbursement  Payment and interest payable
                  by Borrower thereon shall be shared among the Banks (including
                  Issuing  Bank)  which  made or funded the  applicable  Drawing
                  Payment pro rata according to the  respective  amounts of such
                  Drawing Payment so made or funded by such Banks;

                           (v) Each payment of  Commitment  Fees shall be shared
                  among  the Banks pro rata  according  to (A) their  respective
                  Proportionate  Share  and (B) in the case of each  Bank  which
                  becomes a Bank hereunder after the date hereof,  the date upon
                  which such Bank so became a Bank;

                           (vi) Each  payment  of LC Usage  Fees shall be shared
                  among the Banks  (including  Issuing Bank in its capacity as a
                  Bank) pro rata according to (A) their respective Proportionate
                  Share  and (B) in the case of each Bank  which  becomes a Bank
                  hereunder after the date hereof, the date upon which such Bank
                  so became a Bank;

                           (vii) Each payment of interest  (other than  interest
                  on Revolving Loans) shall be shared among the Bank Parties and
                  Agents  owed the amount upon which such  interest  accrues pro
                  rata according to (A) the respective amounts so owed such Bank
                  Parties and (B) the dates on which such  amounts  became owing
                  to such Bank Parties; and

                                       40
<PAGE>

                           (viii) All other  payments  under this  Agreement and
                  the other  Credit  Documents  shall be for the  benefit of the
                  Person or Persons specified.

                  (b) Sharing of  Payments,  Etc. If any Bank Party shall obtain
         any payment (whether  voluntary,  involuntary,  through the exercise of
         any right of setoff,  or otherwise) on account of Revolving  Loans owed
         to it in excess of its  ratable  share of  payments  on account of such
         Revolving  Loans obtained by all Banks entitled to such payments,  such
         Bank  Party  shall  forthwith  purchase  from the  other  Bank  Parties
         entitled to such payments such participations in the Revolving Loans or
         Reimbursement   Obligations   as  shall  be  necessary  to  cause  such
         purchasing  Bank Party to share the excess payment ratably with each of
         them;  provided,  however,  that if all or any  portion of such  excess
         payment is thereafter  recovered from such purchasing Bank Party,  such
         purchase  shall be  rescinded  and each other Bank Party shall repay to
         the  purchasing  Bank  Party the  purchase  price to the extent of such
         recovery  together  with an amount  equal to such  other  Bank  Party's
         ratable share  (according  to the  proportion of (i) the amount of such
         other  Bank  Party's  required  repayment  to (ii) the total  amount so
         recovered  from the  purchasing  Bank) of any  interest or other amount
         paid or  payable by the  purchasing  Bank Party in respect of the total
         amount so recovered.  Borrower agrees that any Bank Party so purchasing
         a participation  from another Bank Party pursuant to this  Subparagraph
         2.09(b) may, to the fullest extent  permitted by law,  exercise all its
         rights of payment  (including the right of setoff, but only as provided
         in Paragraph  8.06) with respect to such  participation  as fully as if
         such Bank Party were the direct  creditor  of Borrower in the amount of
         such participation.

         2.10.   Change of Circumstances.

                  (a) Inability to Determine  Rates.  If, on or before the first
         day of any Interest  Period for any LIBOR Loan,  Agents shall determine
         that (i) the LIBO Rate for such  Interest  Period  cannot be adequately
         and  reasonably  determined  due to the  unavailability  of funds in or
         other  circumstances  affecting the London interbank market or (ii) the
         rates of  interest  for such LIBOR Loans do not  adequately  and fairly
         reflect  the cost to the  Banks of  making or  maintaining  such  LIBOR
         Loans,  Administrative  Agent  shall  immediately  give  notice of such
         condition  to  Borrower  and the  Banks.  After the  giving of any such
         notice and until  Administrative  Agent shall otherwise notify Borrower
         that the  circumstances  giving rise to such condition no longer exist,
         Borrower's  right to request  the making of or  conversion  to, and the
         Banks'  obligations  to  make  or  convert  to  LIBOR  Loans  shall  be
         suspended. Any LIBOR Loans

                                       41
<PAGE>

         outstanding at the  commencement of any such suspension  shall,  unless
         fully  repaid,  be converted  at the end of the then  current  Interest
         Period for such LIBOR Loans into Base Rate Loans unless such suspension
         has then ended.

                  (b)  Illegality.  If,  after the date of this  Agreement,  the
         adoption of any Governmental  Rule, any change in any Governmental Rule
         or the application or requirements  thereof (whether such change occurs
         in accordance with the terms of such Governmental Rule as enacted, as a
         result of amendment or otherwise),  any change in the interpretation or
         administration of any Governmental Rule by any Governmental  Authority,
         or compliance by any Bank with any request or directive (whether or not
         having the force of law) of any  Governmental  Authority  (a "Change of
         Law")  shall make it  unlawful  or  impossible  for any Bank to make or
         maintain   any  LIBOR  Loan,   such  Bank  shall   immediately   notify
         Administrative  Agent and Borrower of such Change of Law.  Upon receipt
         of such  notice,  (i)  Borrower's  right to  request  the  making of or
         conversion to, and such Bank's  obligation to make or convert to, LIBOR
         Loans shall be terminated,  and (ii) Borrower  shall, at the request of
         such Bank,  either (A) pursuant to  Subparagraph  2.01(d),  convert any
         such then outstanding  LIBOR Loans of such Bank into Base Rate Loans at
         the end of the current  Interest  Period for such LIBOR  Loans,  or (B)
         immediately  repay or convert  any such LIBOR  Loans if such Bank shall
         notify  Borrower  that such Bank may not lawfully  continue to fund and
         maintain such LIBOR Loans.  Any conversion or prepayment of LIBOR Loans
         made  pursuant to the  preceding  sentence  prior to the last day of an
         Interest  Period  for such  LIBOR  Loans  shall be deemed a  prepayment
         thereof  for  purposes  of  Paragraph  2.12.  After  any Bank  notifies
         Administrative  Agent  and  Borrower  of such a Change of Law and until
         such Bank  notifies  Administrative  Agent and  Borrower  that it is no
         longer  unlawful or  impossible  for such Bank to make or maintain  any
         LIBOR Loan, all Revolving Loans of such Bank shall be Base Rate Loans.

                  (c) Increased Costs. If, after the date of this Agreement, any
         Change of Law:

                           (i) Shall  subject any Bank to any tax, duty or other
                  charge  with  respect to any LIBOR Loan,  or shall  change the
                  basis of  taxation of payments by Borrower to any Bank on such
                  a LIBOR  Loan or in  respect  to such a LIBOR  Loan under this
                  Agreement  (except  for changes in the rate of taxation on the
                  overall net income of any Bank imposed by its  jurisdiction of
                  incorporation or the jurisdiction in which such Bank maintains
                  a lending office); or

                                       42
<PAGE>
                           (ii)  Shall  impose,  modify or hold  applicable  any
                  reserve (excluding any Reserve Requirement or other reserve to
                  the extent  included in the  calculation  of the LIBO Rate for
                  any LIBOR  Loans),  special  deposit  or  similar  requirement
                  against  assets held by,  deposits or other  liabilities in or
                  for the  account  of,  advances  or  loans  by,  or any  other
                  acquisition of funds by any Bank for any LIBOR Loan; or

                           (iii)  Shall  impose on any Bank any other  condition
                  related to any LIBOR Loan or such Bank's Commitments;

         and the effect of any of the  foregoing is to increase the cost to such
         Bank of making,  renewing,  or maintaining  any such LIBOR Loan or such
         Bank's  Commitments  or to reduce  any amount  receivable  by such Bank
         hereunder,  then Borrower shall from time to time, within five (5) days
         after  demand by such Bank  (which  demand  shall be  accompanied  by a
         statement  setting  forth  in  reasonable  detail  the  basis  for  the
         calculation  of the  amount  demanded),  pay to  such  Bank  additional
         amounts  sufficient to reimburse such Bank for such increased  costs or
         to compensate such Bank for such reduced  amounts;  provided,  however,
         that  Borrower  shall  not be  obligated  to pay any  Bank for any such
         increased costs or reduced  amounts  incurred more than sixty (60) days
         prior to the date of such Bank's  demand for payment if such demand was
         made more than  sixty  (60) days  after the latest of (A) the date such
         Bank received  actual notice of such increased cost or reduced  amount,
         (B) the  effective  date of such  Change  in Law,  or (C) the date such
         Change in Law occurred or was enacted.  A certificate  as to the amount
         of such increased  costs or reduced  amounts  submitted by such Bank to
         Borrower shall  constitute prima facie evidence of such increased costs
         or reduced amounts. The obligations of Borrower under this Subparagraph
         2.10(c) shall survive the payment and  performance  of the  Obligations
         and the termination of this Agreement.

                  (d)  Capital   Requirements.   If,  after  the  date  of  this
         Agreement, any Bank Party determines that (i) any Change of Law affects
         the amount of capital  required or expected  to be  maintained  by such
         Bank  Party or any  Person  controlling  such  Bank  Party (a  "Capital
         Adequacy  Requirement")  and (ii) the amount of capital  maintained  by
         such Bank Party or such Person which is reasonably  attributable  to or
         based upon the Revolving Loans, the Letters of Credit,  the Commitments
         or this  Agreement  must  be  increased  as a  result  of such  Capital
         Adequacy  Requirement  (taking  into  account such Bank Party's or such
         Person's policies with respect to capital adequacy), Borrower shall pay
         to such Bank Party or such Person, within five (5) days after demand of
         such Bank Party  (which  demand  shall be  accompanied  by a  statement
         setting forth in

                                       43
<PAGE>

         reasonable   detail  the  basis  for  the  calculation  of  the  amount
         demanded),  such  amounts  as such  Bank  Party  or such  Person  shall
         reasonably  determine are  necessary to  compensate  such Bank Party or
         such Person for the  increased  costs to such Bank Party or such Person
         of such  increased  capital.  A  certificate  of any Bank Party setting
         forth in reasonable  detail the computation of any such increased costs
         delivered by such Bank Party to Borrower shall  constitute  prima facie
         evidence of such  increased  costs.  The  obligations of Borrower under
         this Subparagraph  2.10(d) shall survive the payment and performance of
         the Obligations and the termination of this Agreement.

                  (e)  Mitigation.  As  promptly  as  practical  after  any Bank
         becomes  aware of (i) any Change of Law which will make it  unlawful or
         impossible for such Bank to make or maintain any LIBOR Loan or (ii) any
         obligation  by  Borrower  to pay any amount  pursuant  to  Subparagraph
         2.10(c) or  Subparagraph  2.10(d),  such Bank shall notify Borrower and
         Administrative  Agent  (and,  if any Bank has given  notice of any such
         event  described in clause (i) or (ii) above and thereafter  such event
         ceases to exist,  such  Bank  shall  promptly  so notify  Borrower  and
         Administrative  Agent).  Each Bank  affected by any Change of Law which
         makes it unlawful or  impossible  for such Bank to make or maintain any
         LIBOR Loan or to which Borrower is obligated to pay any amount pursuant
         to Subparagraph  2.10(c) or  Subparagraph  2.10(d) shall use reasonable
         commercial  efforts   (including   changing  the  jurisdiction  of  its
         Applicable Lending Office) to avoid the effect of such Change of Law or
         to avoid or materially  reduce any amounts which  Borrower is obligated
         to pay pursuant to Subparagraph  2.10(c) or Subparagraph 2.10(d) if, in
         the  reasonable  opinion  of  such  Bank,  such  efforts  would  not be
         disadvantageous  to such Bank or contrary to such Bank's normal banking
         practices.

         2.11.  Taxes on Payments.

                  (a)  Payments  Free of Taxes.  All  payments  made by Borrower
         under this Agreement and the other Credit  Documents shall be made free
         and clear of, and without  deduction or  withholding  for or on account
         of,  any  present  or  future  income,  stamp or other  taxes,  levies,
         imposts,  duties,  charges,  fees,  deductions or withholdings,  now or
         hereafter  imposed,  levied,  collected,  withheld  or  assessed by any
         Governmental Authority (except (i) net income taxes and franchise taxes
         in lieu of net income  taxes  imposed on any Agent or Bank Party by its
         jurisdiction of incorporation or any jurisdiction in which it maintains
         a lending  office and (ii)  withholding  taxes  required to be paid for
         Bank  Parties who do not comply with  Subparagraph  2.11(b) at the time
         they first become Bank Parties hereunder) (all such non-excluded

                                       44
<PAGE>

         taxes,  levies,   imposts,   duties,   charges,  fees,  deductions  and
         withholdings being hereinafter called "Taxes"). Subject to Subparagraph
         2.11(c),  if any Taxes are  required  to be  withheld  from any amounts
         payable  to any Agent or any Bank  Party  hereunder  or under the other
         Credit  Documents,  the  amounts  so payable to such Agent or such Bank
         Party shall be increased to the extent necessary to yield to such Agent
         or such Bank Party  (after  payment of all Taxes)  interest or any such
         other  amounts  payable  hereunder  at  the  rates  or in  the  amounts
         specified in this  Agreement and the other Credit  Documents.  Whenever
         any Taxes are payable by Borrower,  as promptly as possible thereafter,
         Borrower shall send to Administrative  Agent for its own account or for
         the account of such other Agent or such Bank Party, as the case may be,
         a certified copy of an original  official  receipt received by Borrower
         showing payment thereof. If Borrower fails to pay any Taxes when due to
         the appropriate  taxing  authority or fails to remit to  Administrative
         Agent the required  receipts or other  required  documentary  evidence,
         Borrower  shall   indemnify   Agents  and  the  Bank  Parties  for  any
         incremental taxes, interest or penalties that may become payable by any
         Agent  or  any  Bank  Party  as a  result  of  any  such  failure.  The
         obligations of Borrower under this  Subparagraph  2.11(a) shall survive
         the payment and  performance of the  Obligations and the termination of
         this Agreement.

                  (b)  Withholding  Exemption  Certificates.  On or prior to the
         Closing Date, each Bank which is not incorporated under the laws of the
         United  States of America or a state  thereof shall deliver to Borrower
         and  Administrative  Agent either two duly  completed  copies of United
         States  Internal  Revenue  Service  Form  1001  or 4224  (or  successor
         applicable form), as the case may be, certifying in each case that such
         Bank is  entitled  to receive  payments  under this  Agreement  without
         deduction or withholding of any United States federal taxes.  Each Bank
         which delivers to Borrower and Administrative Agent a Form 1001 or 4224
         pursuant to the immediately  preceding  sentence further  undertakes to
         deliver to Borrower and Administrative Agent two further copies of Form
         1001 or  4224,  or  successor  applicable  forms,  or other  manner  of
         certification  or procedure,  as the case may be, on or before the date
         that any such letter or form  expires or becomes  obsolete or after the
         occurrence  of any event  requiring a change in the most recent  letter
         and form  previously  delivered  by it to Borrower  and  Administrative
         Agent,  and such  extensions or renewals  thereof as may  reasonably be
         requested by Borrower or Administrative  Agent,  certifying in the case
         of a Form 1001 or 4224 that such Bank is entitled  to receive  payments
         under this  Agreement  without  deduction or  withholding of any United
         States  federal  taxes,  unless in any such  cases an event  (including
         without limitation any change in treaty, law or regulation) has

                                       45
<PAGE>

         occurred prior to the date on which any such delivery  would  otherwise
         be required  which renders all such forms  inapplicable  or which would
         prevent a Bank from duly  completing  and delivering any such letter or
         form  with   respect  to  it  and  such  Bank   advises   Borrower  and
         Administrative  Agent  that it is not  capable  of  receiving  payments
         without any deduction or  withholding  of United States  federal income
         tax.

                  (c)   Mitigation.   Any  Agent  or  Bank  Party  claiming  any
         additional  amounts  payable  pursuant to this Paragraph 2.11 shall use
         reasonable  commercial  efforts  to file any  certificate  or  document
         requested in writing by Borrower  (including  without limitation copies
         of Internal Revenue Service Form 1001, or successor forms, reflecting a
         reduced  rate of  withholding)  or to change  the  jurisdiction  of its
         Applicable Lending Office if the making of such a filing or such change
         in the  jurisdiction  of its Applicable  Lending Office would avoid the
         need for or materially reduce the amount of any such additional amounts
         which may thereafter  accrue and if, in the reasonable  opinion of such
         Agent or Bank Party in the case of a change in the  jurisdiction of its
         Applicable Lending Office,  such change would not be disadvantageous to
         such Agent or Bank Party or  contrary to such  Agent's or Bank  Party's
         normal banking practices.

                  (d) Tax  Returns.  Nothing  contained in this  Paragraph  2.11
         shall require any Agent or Bank Party to make  available any of its tax
         returns (or any other information  relating to its taxes which it deems
         to be confidential).

         2.12. Funding Loss Indemnification. If Borrower shall (a) repay, prepay
or  convert  any LIBOR  Loan on any day other  than the last day of an  Interest
Period  therefor  (whether  a  scheduled  payment,  an  optional  prepayment  or
conversion, a mandatory prepayment or conversion, a payment upon acceleration or
otherwise),  (b) fail to borrow any LIBOR  Loan for which a Notice of  Borrowing
has been delivered to  Administrative  Agent (whether as a result of the failure
to satisfy any  applicable  conditions  or otherwise) or (c) fail to convert any
Revolving  Loans  into LIBOR  Loans in  accordance  with a Notice of  Conversion
delivered to Administrative Agent (whether as a result of the failure to satisfy
any applicable  conditions or  otherwise),  Borrower  shall,  upon demand by any
Bank,  reimburse  such  Bank for and hold such Bank  harmless  from all  Funding
Losses and all related  incidental  costs and expenses  (such as  administrative
costs  and  expenses)  incurred  by such  Bank as a  result  of such  repayment,
prepayment or failure.  Each Bank  demanding  payment under this  Paragraph 2.12
shall deliver to Borrower,  with a copy to  Administrative  Agent, a certificate
setting  forth the amount of Funding  Losses and  related  incidental  costs and
expenses for which demand is made, which certificate shall set forth in

                                       46
<PAGE>

reasonable detail the calculation of the amount demanded.  Such a certificate so
delivered  to Borrower  shall  constitute  prima facie  evidence of such Funding
Losses and related  incidental  costs and expenses.  The obligations of Borrower
under this  Paragraph  2.12 shall  survive the payment  and  performance  of the
Obligations  and the termination of this Agreement for a period of one year from
the date of termination.

         2.13.  Replacement of Banks.  If any Bank shall (a) become a Defaulting
Bank more than two (2) times in a period of twelve (12) consecutive  months, (b)
continue as a Defaulting  Bank for more than five (5) Business Days at any time,
(c)  suspend  its  obligation  to make  or  maintain  LIBOR  Loans  pursuant  to
Subparagraph  2.10(b) for a reason  which is not  applicable  to the Banks (or a
material  number of the  Banks)  generally,  or (d)  demand  any  payment  under
Subparagraph 2.10(c), 2.10(d) or 2.11(a) for a reason which is not applicable to
the Banks (or a material number of Banks) generally,  then Administrative  Agent
may (or upon the written request of Borrower or Agents, shall) replace such Bank
(the "affected Bank"), or cause such affected Bank to be replaced,  with another
bank (the  "replacement  bank")  satisfying the requirements of an Assignee Bank
under Subparagraph  8.05(c),  by having the affected Bank sell and assign all of
its rights and obligations  under this Agreement and the other Credit  Documents
to the replacement  bank pursuant to Subparagraph  8.05(c);  provided,  however,
that if Borrower seeks to exercise such right,  it must do so within one hundred
twenty (120) days after it first knows or should have known of the occurrence of
the event or events giving rise to such right, and neither  Administrative Agent
nor any Agent nor any Bank shall have any  obligation  to  identify  or locate a
replacement  bank for  Borrower.  Upon receipt by any affected Bank of a written
notice from Administrative Agent stating that Administrative Agent is exercising
the replacement right set forth in this Paragraph 2.14, such affected Bank shall
sell and assign all of its rights and  obligations  under this Agreement and the
other  Credit  Documents  to the  replacement  bank  pursuant  to an  Assignment
Agreement and Subparagraph  8.05(c) for a purchase price equal to the sum of the
principal  amount of the affected  Bank's  Revolving Loans so sold and assigned,
all accrued  and unpaid  interest  thereon and its ratable  share of all fees to
which it is entitled.


SECTION III.   CONDITIONS PRECEDENT.

         3.01. Initial Conditions Precedent. The obligations of the Bank Parties
to make the Revolving Loans comprising the initial  Borrowing or of Issuing Bank
to issue the initial  Letter of Credit are subject to receipt by  Administrative
Agent,  on or prior to the Closing Date,  of each item listed in Schedule  3.01,
each in form and substance reasonably satisfactory to the Banks,

                                       47
<PAGE>

and with sufficient copies for, Administrative Agent and each Bank.

         3.02. Conditions Precedent to Each Credit Event. The occurrence of each
Credit Event (including the initial  Borrowing and the initial Letter of Credit)
is subject to the further conditions that:

                  (a) Borrower shall have delivered to Administrative Agent (and
         Issuing Bank, in the case of an LC Application) the Notice of Borrowing
         for such Credit Event in accordance with this Agreement;

                  (b) On the date such Credit Event is to occur and after giving
         effect to such Credit Event, the following shall be true and correct:

                           (i) The  representations  and  warranties of Borrower
                  and its  Subsidiaries  set forth in Paragraph  4.01 and in the
                  other  Credit  Documents  are true and correct in all material
                  respects as if made on such date  (except for  representations
                  and warranties  expressly made as of a specified  date,  which
                  shall be true as of such date); and

                           (ii) No Default or Event of Default has  occurred and
                  is continuing or will result from such Credit Event; and

                  (c) On the date such Credit Event is to occur and after giving
         effect to such Credit  Event,  all of the Credit  Documents are in full
         force and effect.

The submission by Borrower to  Administrative  Agent of each Notice of Borrowing
and each LC Application  shall be deemed to be a representation  and warranty by
Borrower as of the date thereon as to the above.

         3.03.  Conditions  Precedent to Each  Conversion  or Each  Selection of
Interest  Period.  The occurrence of the conversion of any Base Rate Loan into a
LIBOR  Loan or the  selection  of a new  Interest  Period  for any LIBOR Loan is
subject to the further conditions that:

                  (a) Borrower shall have delivered to Administrative  Agent the
         Notice of Conversion  or Notice of Interest  Period  Selection,  as the
         case may be, for such  conversion or selection of an Interest Period in
         accordance with this Agreement;

                  (b) On the date such  conversion  or  selection of an Interest
         Period is to occur and after giving effect to such

                                       48
<PAGE>

         conversion or selection of an Interest  Period,  no Default or Event of
         Default  has  occurred  and is  continuing  or will  result  from  such
         conversion or selection of an Interest Period; and

                  (c) On the date such  conversion  or  selection of an Interest
         Period is to occur  and  after  giving  effect  to such  conversion  or
         selection of an Interest  Period,  all of the Credit  Documents  are in
         full force and effect.

The submission by Borrower to Administrative  Agent of each Notice of Conversion
and  each  Notice  of  Interest  Period  Selection  shall  be  deemed  to  be  a
representation and warranty by Borrower as of the date thereon as to the above.


SECTION IV.   REPRESENTATIONS AND WARRANTIES.

         4.01. Borrower's Representations and Warranties. In order to induce the
Agents and Bank Parties to enter into this Agreement, Borrower hereby represents
and warranties to the Agents and Bank Parties as follows:

                  (a) Due  Incorporation,  Qualification,  etc. Each of Borrower
         and  Borrower's  Subsidiaries  (i)  is a  corporation  duly  organized,
         validly   existing  and  in  good  standing   under  the  laws  of  its
         jurisdiction of incorporation; (ii) has the power and authority to own,
         lease and  operate  its  properties  and carry on its  business  as now
         conducted; and (iii) is duly qualified,  licensed to do business and in
         good standing as a foreign  corporation in each jurisdiction  where the
         failure to be so qualified or licensed is  reasonably  likely to have a
         Material Adverse Effect.

                  (b)  Authority.  The  execution,  delivery and  performance by
         Borrower  of each  Credit  Document  executed,  or to be  executed,  by
         Borrower and the consummation of the transactions  contemplated thereby
         (i) are within the corporate  power of Borrower and (ii) have been duly
         authorized by all necessary corporate actions on the part of Borrower.

                  (c)  Enforceability.  Each Loan  Document  in the nature of an
         agreement  executed,  or to be executed,  by Borrower has been, or will
         be, duly  executed and delivered by Borrower and  constitutes,  or will
         constitute,   a  legal,  valid  and  binding  obligation  of  Borrower,
         enforceable  against  Borrower in accordance with its terms,  except as
         limited by bankruptcy,  insolvency or other laws of general application
         relating to or affecting the enforcement of creditors' rights generally
         and general principles of equity

                                       49
<PAGE>

         (regardless of whether considered in a proceeding in equity or at law).

                  (d) Non-Contravention.  The execution and delivery by Borrower
         of the Loan  Documents  and the  performance  and  consummation  of the
         transactions contemplated thereby do not (i) violate any Requirement of
         Law applicable to Borrower; (ii) violate any provision of, or result in
         the  breach or the  acceleration  of, or  entitle  any other  Person to
         accelerate  (whether  after  the  giving  of notice or lapse of time or
         both),  any Contractual  Obligations of Borrower which could reasonably
         be expected to have a Material  Adverse Effect;  or (iii) result in the
         creation  or  imposition  of any Lien (or the  obligation  to create or
         impose  any Lien)  upon any  property,  asset or  revenue  of  Borrower
         (except such Liens as may be created in favor of  Administrative  Agent
         pursuant to this Agreement or the other Credit Documents).

                  (e)  Approvals.  No  material  consent,   approval,  order  or
         authorization  of, or  registration,  declaration  or filing with,  any
         Governmental   Authority  or  other  Person  having  jurisdiction  over
         Borrower or any of Borrower's  Subsidiaries (including the shareholders
         of any  Person)  is  required  in  connection  with the  execution  and
         delivery of the Loan Documents  executed by Borrower or the performance
         and  consummation of the transactions  contemplated  thereby except for
         consents,    approvals,    orders,    authorizations,    registrations,
         declarations  or filings  required to be obtained or made in accordance
         with the Loan Documents.

                  (f) No  Violation  or  Default.  Neither  Borrower  nor any of
         Borrower's  Subsidiaries  is in violation of or in default with respect
         to (i) any  Requirement  of Law  applicable  to such Person or (ii) any
         Contractual  Obligation  of such  Person,  where,  in each  case,  such
         violation or default is  reasonably  likely to have a Material  Adverse
         Effect.  Without  limiting the  generality  of the  foregoing,  neither
         Borrower nor any of Borrower's  Subsidiaries (A) is in violation of any
         Environmental  Laws, (B) to the best of Borrower's  knowledge,  has any
         liability or potential  liability under any  Environmental  Laws or (C)
         has  received  written  notice  or other  written  communication  of an
         investigation or is under  investigation by any Governmental  Authority
         having  jurisdiction  over Borrower or any of  Borrower's  Subsidiaries
         having authority to enforce  Environmental  Laws,  where, in each case,
         such violation, liability or investigation could reasonably be expected
         to have a  Material  Adverse  Effect,  nor,  to the best of  Borrower's
         knowledge, have any Hazardous Materials been released or disposed of on
         any of the  properties  owned by  Borrower or  Borrower's  Subsidiaries
         which, either individually or in the aggregate, could reasonably be

                                       50
<PAGE>

         expected  to have a  Material  Adverse  Effect.  No Event of Default or
         Default has occurred and is continuing.

                  (g) Litigation.  Except as set forth in the Disclosure Letter,
         no actions (including, without limitation,  derivative actions), suits,
         proceedings  or  investigations  are  pending or, to the  knowledge  of
         Borrower, threatened against Borrower or any of Borrower's Subsidiaries
         at law or in  equity in any  court or  before  any  other  Governmental
         Authority  having  jurisdiction  over  Borrower  or any  of  Borrower's
         Subsidiaries which (i) is reasonably likely (alone or in the aggregate)
         to have a  Material  Adverse  Effect or (ii)  seeks to  enjoin,  either
         directly or indirectly,  the execution,  delivery or performance of the
         Loan Documents or the transactions contemplated thereby.

                  (h) Title;  Possession  Under Leases.  Borrower and Borrower's
         Subsidiaries  (i) own and have  good  title  (without  regard  to minor
         defects of title) to all their other  respective  properties and assets
         which are  material to the  business of Borrower  and its  Subsidiaries
         taken as a whole, as reflected in the most recent Financial  Statements
         delivered to  Administrative  Agent (except those assets and properties
         disposed of since the date of such  Financial  Statements in compliance
         with this  Agreement) and (ii) own and have good title (without  regard
         to minor  defects  of title) to all  respective  properties  and assets
         acquired by Borrower and Borrower's  Subsidiaries since such date which
         are material to the business of Borrower and its Subsidiaries  taken as
         a whole (except those assets and  properties  disposed of in compliance
         with this  Agreement).  Such  assets and  properties  are subject to no
         Lien, except for Permitted Liens.

                  (i) Financial Statements. The Financial Statements of Borrower
         which have been delivered to  Administrative  Agent in connection  with
         this  Agreement,  (i) are in  accordance  with the books and records of
         Borrower,  which have been  maintained in accordance with good business
         practice;  (ii) have been prepared in conformity  with GAAP;  and (iii)
         fairly  present in all material  respects the  financial  condition and
         results of  operations  of Borrower as of the date  thereof and for the
         periods covered thereby.

                  (j) No Agreements to Sell Assets; Etc. As of the Closing Date,
         neither  Borrower nor any of Borrower's  Material  Subsidiaries has any
         legal obligation,  absolute or contingent, to any Person to sell all or
         any  material  part of the  assets  of  Borrower  or any of  Borrower's
         Material  Subsidiaries  (other  than  Transfers  permitted  pursuant to
         Subparagraph 5.02(c)), or to effect any merger,  consolidation or other
         reorganization of Borrower or any of

                                       51
<PAGE>
         Borrower's  Subsidiaries  or to enter into any  agreement  with respect
         thereto.

                  (k) Employee Benefit Plans.

                           (i) Based on the latest  valuation  of each  Employee
                  Benefit  Plan that  either  Borrower  or any  ERISA  Affiliate
                  maintains  or  contributes  to,  or has any  obligation  under
                  (which  occurred  within  twelve  months  of the  date of this
                  representation),  the aggregate  benefit  liabilities  of such
                  plan  within the  meaning of ss.  4001 of ERISA did not exceed
                  the  aggregate  value  of the  assets  of such  plan.  Neither
                  Borrower  nor  any  ERISA  Affiliate  has any  liability  with
                  respect  to any  post-retirement  benefit  under any  Employee
                  Benefit  Plan which is a welfare  plan (as  defined in section
                  3(1)  of  ERISA),   other  than   liability  for  health  plan
                  continuation  coverage  described  in Part 6 of Title  I(B) of
                  ERISA,  which liability for health plan contribution  coverage
                  is not reasonably likely to have a Material Adverse Effect.

                           (ii) Each  Employee  Benefit Plan  complies,  in both
                  form and operation,  in all material respects, with its terms,
                  ERISA  and the  Code,  and no  condition  exists  or event has
                  occurred  with  respect to any such plan which would result in
                  the  incurrence by either  Borrower or any ERISA  Affiliate of
                  any material liability, fine or penalty. Each Employee Benefit
                  Plan,  related trust agreement,  arrangement and commitment of
                  Borrower or any ERISA  Affiliate is legally  valid and binding
                  and in full force and  effect.  No  Employee  Benefit  Plan is
                  being audited or investigated  by any government  agency or is
                  subject to any pending or  threatened  claim or suit.  Neither
                  Borrower nor any ERISA  Affiliate has nor, to the knowledge of
                  Borrower  or any ERISA  Affiliate,  has any  fiduciary  of any
                  Employee  Benefit  Plan  engaged in a  prohibited  transaction
                  under section 406 of ERISA or section 4975 of the Code.

                           (iii)  Neither  Borrower nor any ERISA  Affiliate has
                  any material contingent obligations to any Multiemployer Plan.
                  Neither  Borrower  nor any ERISA  Affiliate  has  incurred any
                  material  liability  (including  secondary  liability)  to any
                  Multiemployer  Plan  as a  result  of a  complete  or  partial
                  withdrawal from such  Multiemployer Plan under Section 4201 of
                  ERISA or as a result of a sale of assets  described in Section
                  4204 of ERISA.  Neither  Borrower nor any ERISA  Affiliate has
                  been notified that any Multiemployer Plan is in reorganization
                  or  insolvent  under and within the meaning of Section 4241 or
                  Section 4245 of ERISA or

                                       52
<PAGE>
                  that any  Multiemployer  Plan intends to terminate or has been
                  terminated under Section 4041A of ERISA.

                  (l)  Other  Regulations.  Neither  Borrower  nor  any  of  its
         Subsidiaries is subject to regulation under the Investment  Company Act
         of 1940,  the Public Utility  Holding  Company Act of 1935, the Federal
         Power Act, any state public utilities code or to any other Governmental
         Rule limiting its ability to incur indebtedness.

                  (m)  Patent  and  Other   Rights.   Borrower  and   Borrower's
         Subsidiaries own or license under validly existing agreements (or could
         obtain such  ownership,  possession or license on terms not  materially
         adverse to Borrower and its  Subsidiaries,  taken as a whole, and under
         circumstances  that could not reasonably be expected to have a Material
         Adverse Effect), and have the full right to license without the consent
         of any other Person, all patents,  licenses,  trademarks,  trade names,
         trade secrets,  service  marks,  copyrights and all rights with respect
         thereto,  which are material to conduct the  businesses of Borrower and
         its Subsidiaries (taken as a whole) as now conducted.

                  (n) Governmental Charges. Borrower and Borrower's Subsidiaries
         have filed or caused to be filed all  material  tax  returns  which are
         required  by  law  to  be  filed  by  them.   Borrower  and  Borrower's
         Subsidiaries have paid, or made provision for the payment of, all taxes
         and other  Governmental  Charges which have become due pursuant to said
         returns or otherwise,  except such Governmental  Charges, if any, which
         are being  contested  in good faith and as to which  adequate  reserves
         (determined  in  accordance  with GAAP) have been provided or which are
         not reasonably likely to have a Material Adverse Effect if unpaid.

                  (o) Margin Stock.  Borrower owns no Margin Stock which, in the
         aggregate,  would  constitute  a  substantial  part  of the  assets  of
         Borrower, and no proceeds of any Revolving Loan and no Letter of Credit
         will be used to purchase or carry,  directly or indirectly,  any Margin
         Stock or to extend credit,  directly or  indirectly,  to any Person for
         the purpose of purchasing or carrying any Margin Stock.

                  (p)  Subsidiaries,  etc.  Set forth in  Schedule  4.01(p)  (as
         supplemented by Borrower on or immediately prior to each anniversary of
         the  Closing  Date in a written  notice to  Administrative  Agent) is a
         complete list of all of Borrower's  Subsidiaries,  the  jurisdiction of
         incorporation  of each,  the asset value of each and the  percentage of
         Borrower's  consolidated  total assets  represented by each. Except for
         such  Subsidiaries,  Borrower has no Subsidiaries,  is not a partner in
         any partnership or a joint venturer in

                                       53
<PAGE>
         any joint venture except the joint venture with MKE in MKE-Quantum.

                  (q)  Solvency,   Etc.   Borrower  and  each  of  its  Material
         Subsidiaries  is Solvent and,  after the  execution and delivery of the
         Loan Documents and the  consummation of the  transactions  contemplated
         thereby, will be Solvent.

                  (r)   Catastrophic   Events.   Neither  Borrower  nor  any  of
         Borrower's Subsidiaries and none of their properties is affected by any
         fire, explosion,  strike,  lockout or other labor dispute,  earthquake,
         embargo or other casualty that is reasonably  likely to have a Material
         Adverse Effect. As of the Closing Date, there are no disputes presently
         subject to grievance procedure,  arbitration or litigation under any of
         the collective bargaining agreements,  employment contracts or employee
         welfare  or  incentive  plans to which  Borrower  or any of  Borrower's
         Subsidiaries  is a party,  and there  are no  strikes,  lockouts,  work
         stoppages  or  slowdowns,  or,  to  the  best  knowledge  of  Borrower,
         jurisdictional   disputes  or   organizing   activities   occurring  or
         threatened  which alone or in the  aggregate are  reasonably  likely to
         have a Material Adverse Effect.

                  (s) No Material  Adverse Effect.  No event has occurred and no
         condition  exists which could reasonably be expected to have a Material
         Adverse Effect.

                  (t)  Accuracy  of  Information  Furnished.  None of the Credit
         Documents and none of the other certificates, statements or information
         furnished  to Bank  Party by or on  behalf  of  Borrower  or any of its
         Subsidiaries   in   connection   with  the  Credit   Documents  or  the
         transactions  contemplated thereby (taken together with all such Credit
         Documents,  certificates,  statements or information)  contains or will
         contain any untrue  statement of a material  fact or omits or will omit
         to state a material fact necessary to make the statements  therein,  in
         light of the  circumstances  under which they were made, not misleading
         (it being  understood  by the Bank  Parties  that the  projections  and
         forecasts  provided by Borrower  are not to be viewed as facts and that
         actual results during the period or periods covered by such projections
         and forecasts may differ from the projected or forecasted results).

         4.02. Reaffirmation.  Borrower shall be deemed to have reaffirmed,  for
the benefit of the Agents and Bank  Parties,  each  representation  and warranty
contained in Paragraph  4.01 on and as of the date of each Credit Event  (except
for representations and warranties  expressly made as of a specified date, which
shall be true as of such date).

                                       54
<PAGE>

SECTION V.  COVENANTS.

         5.01.  Affirmative  Covenants.  Until the termination of this Agreement
and the satisfaction in full by Borrower of all Obligations (other than inchoate
indemnity  obligations  of  Borrower),  Borrower  will  comply,  and will  cause
compliance,  with the following  affirmative  covenants,  unless  Majority Banks
shall otherwise consent in writing:

                  (a) Financial Statements, Reports, etc. Borrower shall furnish
         to  Administrative  Agent  (and  Administrative  Agent  shall  promptly
         thereupon  furnish to each Bank) the  following,  each in such form and
         such detail as Administrative Agent shall reasonably request:

                           (i) As soon as  available  and in no event later than
                  forty-five (45) days after the last day of each fiscal quarter
                  of  Borrower  which is not a fiscal  year  end,  a copy of the
                  unaudited  Financial  Statements  of Borrower for such quarter
                  and for the  fiscal  year to  date  (excluding  statements  of
                  shareholders'  equity),  certified by an Executive  Officer of
                  Borrower to present fairly the financial condition, results of
                  operations and other information reflected therein and to have
                  been  prepared  in  accordance  with GAAP  (subject  to normal
                  year-end audit adjustments);

                           (ii) As soon as available  and in no event later than
                  ninety  (90)  days  after  the  close of each  fiscal  year of
                  Borrower,  (A) copies of the  audited  consolidated  Financial
                  Statements  of  Borrower  for such fiscal  year,  audited by a
                  nationally  recognized  accounting  firm and (B) copies of the
                  unqualified   opinions  (or  qualified   opinions   reasonably
                  acceptable to Agents);

                           (iii)   Contemporaneously   with  the  quarterly  and
                  year-end  Financial   Statements  required  by  the  foregoing
                  clauses  (i)  and  (ii),  (A) a  certificate  of an  Executive
                  Officer of  Borrower  in the form of Exhibit E,  appropriately
                  completed, together with such financial computations as Agents
                  may reasonably request to determine  compliance with the terms
                  of  this  Agreement  (a  "Compliance   Certificate")  and  (B)
                  management's  discussion  of  Borrower's  operations  for  the
                  period  covered  by  such  Financial  Statements  in the  form
                  supplied to  Borrower's  stockholders,  including a comparison
                  with Borrower's  operations for the  corresponding  quarter in
                  the immediately  preceding fiscal year or with the immediately
                  preceding  fiscal  year,  as the case may be,  as set forth in
                  Borrower's  10-K and 10-Q reports  filed by Borrower or any of
                  its

                                       55
<PAGE>

                  Subsidiaries with the Securities and Exchange Commission;

                           (iv) As soon as  possible  and in no event later than
                  five (5) Business Days after any Executive Officer of Borrower
                  or any Vice President of Human  Resources of Borrower knows of
                  the occurrence or existence of (A) any Reportable  Event under
                  any  Employee  Benefit  Plan or  Multiemployer  Plan,  (B) any
                  litigation,   suits  or  claims   against   Borrower   or  its
                  Subsidiaries  involving  claimed  monetary  damages payable by
                  Borrower or any of its Subsidiaries of $25,000,000 or more not
                  covered by insurance,  (C) any other event or condition  which
                  is reasonably likely to have a Material Adverse Effect, or (D)
                  any Default or Event of Default; the statement of an Executive
                  Officer of  Borrower  setting  forth  details  of such  event,
                  condition,  Default or Event of Default  and the action  which
                  Borrower proposes to take with respect thereto;

                           (v) As soon as  available  and in no event later than
                  five (5) Business Days after they are sent,  made available or
                  filed,  copies  of (A) all  registration  statements  filed on
                  forms S-1,  S-2, S-3 or S-4 and 8-K, 10-K and 10-Q reports and
                  such additional  material  reports filed by Borrower or any of
                  its   Subsidiaries   with  any  securities   exchange  or  the
                  Securities  and Exchange  Commission;  (B) all reports,  proxy
                  statements and financial  statements sent or made available by
                  Borrower  or any of its  Subsidiaries  to its public  security
                  holders  generally;  and  (C) all  press  releases  and  other
                  similar public statements concerning any material developments
                  in the business of Borrower or any of Borrower's  Subsidiaries
                  made  available by Borrower or any of Borrower's  Subsidiaries
                  to the public generally; and

                           (vi) Such other certificates,  opinions,  statements,
                  documents  and  information  relating  to  the  operations  or
                  condition  (financial  or otherwise) of Borrower or any of its
                  Subsidiaries,  and  compliance  by Borrower  with the terms of
                  this  Agreement  and the other  Credit  Documents  as any Bank
                  Party  through  Administrative  Agent  may  from  time to time
                  reasonably request.

         Notwithstanding the foregoing,  it is understood and agreed that to the
         extent Borrower files Forms 10-K and 10-Q (or any successor forms) with
         the  Securities and Exchange  Commission (or any successor  agency) and
         such forms are required to contain the same  information as required by
         clauses (i), (ii) and (iii) (B) of Subparagraph 5.01(a),

                                       56
<PAGE>

         Borrower may deliver  copies of such forms with respect to the relevant
         time periods in lieu of the  deliveries  specified in clauses (i), (ii)
         and (iii) (B) of Subparagraph 5.01(a) when such reports are required to
         be filed with the Securities and Exchange Commission.

                  (b) Books and Records.  Borrower and its Subsidiaries shall at
         all times keep proper  books of record and account in  accordance  with
         good  business  practices  and  GAAP  (and,  in  the  case  of  Foreign
         Subsidiaries, local accounting rules or GAAP to the extent required).

                  (c) Inspections.  Borrower and its  Subsidiaries  shall permit
         personnel  of  Administrative  Agent  and,  if no  Default  or Event of
         Default has  occurred and is  continuing,  with the consent of Borrower
         (which  consent  shall not be  unreasonably  withheld or delayed),  any
         Person designated by  Administrative  Agent, upon reasonable notice and
         during  normal  business  hours,  to  visit  and  inspect  any  of  the
         properties and offices of Borrower and its Subsidiaries, to examine the
         books and  records of  Borrower  and its  Subsidiaries  and make copies
         thereof and to discuss the  affairs,  finances and accounts of Borrower
         and its  Subsidiaries  with, and to be advised as to the same by, their
         officers, auditors and accountants,  all at such times and intervals as
         Administrative  Agent  may  reasonably  request.   Notwithstanding  any
         provision of this  Agreement to the contrary,  so long as no Default or
         Event  of  Default  shall  have  occurred  and be  continuing,  neither
         Borrower  nor any of its  Subsidiaries  shall be required to  disclose,
         permit the inspection, examination, photocopying or making extracts of,
         or  discuss,  any  document,  information  or  other  matter  that  (i)
         constitutes  non-financial  trade secrets or non-financial  proprietary
         information or (ii) the disclosure of which to any Bank Party, or their
         designated  representative,  is then prohibited by law or any agreement
         binding on  Borrower  or any of its  Subsidiaries  that was not entered
         into by Borrower or any such  Subsidiary  for the purpose of concealing
         information from the Bank Parties.

                  (d) Insurance. Borrower and its Subsidiaries shall:

                           (i) Carry and maintain  insurance of the types and in
                  the amounts  customarily  carried from time to time during the
                  term of this Agreement by others engaged in substantially  the
                  same  business  as  such  Person  and  operating  in the  same
                  geographic area as such Person, including, but not limited to,
                  fire,   public   liability,   property   damage  and  worker's
                  compensation; and


                                       57
<PAGE>

                           (ii)  Deliver  to  Administrative  Agent from time to
                  time, as Administrative  Agent may request,  schedules setting
                  forth all insurance then in effect.

                           (iii)  Notwithstanding  clauses  (i) and (ii)  above,
                  Borrower and any of its  Subsidiaries  may self-insure in lieu
                  of maintaining  all or a portion of the insurance  required to
                  be  maintained  pursuant  to this  Subsection  5.01(d)  to the
                  extent  determined  by  Borrower's  Board of  Directors  to be
                  appropriate  and in the best  interests  of  Borrower  and its
                  Subsidiaries taken as a whole.

                  (e) Governmental Charges.  Borrower and its Subsidiaries shall
         promptly pay and  discharge  when due all taxes and other  Governmental
         Charges prior to the date upon which penalties accrue thereon which, if
         unpaid, are reasonably likely to have a Material Adverse Effect, except
         such  taxes  and other  Governmental  Charges  as may in good  faith be
         contested or disputed,  or for which  arrangements for deferred payment
         have been made,  provided that in each such case  appropriate  reserves
         are maintained in accordance with GAAP.

                  (f) Use of  Proceeds.  Borrower  shall use the proceeds of the
         Revolving  Loans  and the  Letters  of Credit  only for the  respective
         purposes set forth in Subparagraph  2.01(g) and  Subparagraph  2.02(g).
         Borrower  shall not use any part of the proceeds of any Revolving  Loan
         or any Letter of Credit,  directly  or  indirectly,  for the purpose of
         purchasing  or  carrying  any  Margin  Stock  or  for  the  purpose  of
         purchasing  or  carrying  or  trading  in  any  securities  under  such
         circumstances as to involve Borrower,  any Bank Party or any Agent in a
         violation  of  Regulations  G, T, U or X issued by the Federal  Reserve
         Board.

                  (g) General  Business  Operations.  Each of  Borrower  and its
         Subsidiaries  shall (i) subject to  Subparagraph  5.02(c) and  5.02(d),
         preserve and maintain its  corporate  existence and all of its material
         rights,  privileges and franchises  reasonably necessary to the conduct
         of its  business,  (ii) conduct its business  activities  in compliance
         with all Requirements of Law and Contractual  Obligations applicable to
         such  Person,  the  violation of which is  reasonably  likely to have a
         Material  Adverse Effect,  (iii) keep all property useful and necessary
         in its business in good working order and condition,  ordinary wear and
         tear excepted in accordance with prudent business  practices,  and (iv)
         pay and perform all Contractual  Obligations as and when due (except to
         the  extent  disputed  in good  faith by  Borrower  or the  appropriate
         Subsidiary and where  non-payment  would not be reasonably  expected to
         have a Material  Adverse  Effect).  Borrower  shall  maintain its chief
         executive office and principal

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<PAGE>

         place of business in the United States and shall not relocate its chief
         executive  office or principal place of business  outside of California
         without providing Administrative Agent with prior written notice.

         5.02. Negative  Covenants.  Until the termination of this Agreement and
the  satisfaction  in full by Borrower of all  Obligations  (other than inchoate
indemnity  obligations  of  Borrower),  Borrower  will  comply,  and will  cause
compliance,  with the following negative covenants,  unless Majority Banks shall
otherwise consent in writing:

                  (a) Indebtedness. Neither Borrower nor any of its Subsidiaries
         shall create,  incur, assume or permit to exist any Indebtedness or any
         Guaranty    Obligations   except   for   the   following    ("Permitted
         Indebtedness"):

                           (i) The  Obligations  of  Borrower  under the  Credit
                  Documents;

                           (ii)  Indebtedness  listed in the  Disclosure  Letter
                  existing on the date of this Agreement;

                           (iii)  Indebtedness of Borrower and its  Subsidiaries
                  under loans and Capital Leases  incurred by Borrower or any of
                  its  Subsidiaries to finance the acquisition by such Person of
                  real  property,  fixtures,  equipment  or other  fixed  assets
                  provided that in each case, (A) such  Indebtedness is incurred
                  by such  Person  at the time  of,  or not  later  than six (6)
                  months after,  the  acquisition by such Person of the property
                  so  financed  and (B) such  Indebtedness  does not  exceed the
                  purchase price of the property so financed;

                           (iv)  Indebtedness  arising from the  endorsement  of
                  instruments   for   collection  in  the  ordinary   course  of
                  Borrower's or a Subsidiary's business;

                           (v)  Indebtedness  of Borrower under the  Convertible
                  Subordinated Debentures;

                           (vi)  Indebtedness  of Borrower under the External LC
                  Agreement,  provided  that (A) the  only  credit  extended  to
                  Borrower  pursuant to the  External LC  Agreement  consists of
                  letters  of  credit  issued  for  the  benefit  of  MKE or its
                  affiliates  to  secure  obligations  owed by  Borrower  to the
                  beneficiaries for the purchase price of inventory; (B) the sum
                  at any time of the  aggregate  face  amount of all  letters of
                  credit issued and outstanding  under the External LC Agreement
                  plus the aggregate amount of all  unreimbursed  drawings under
                  such letters of credit does not exceed eighty-five

                                       59
<PAGE>

                  million  Dollars   ($85,000,000);   (C)  the  Indebtedness  of
                  Borrower  under  the  External  LC  Agreement  is at all times
                  either  unsecured  or secured by Liens  permitted  pursuant to
                  clause (xvii) of Subparagraph  5.02(b);  and (D) the financial
                  covenants  of Borrower  set forth in the External LC Agreement
                  are less restrictive than the financial covenants set forth on
                  Schedule 5.02(a);

                           (vii)  Subordinated  Indebtedness  of Borrower to any
                  Person,   provided   that  (A)  such   Indebtedness   contains
                  subordination  provisions no less  favorable to the Agents and
                  Banks  than  those  set  forth on  Exhibit  F or as  otherwise
                  approved  by  the  Majority  Banks;   and  (B)  the  aggregate
                  principal  amount  of  all   Subordinated   Debt  of  Borrower
                  outstanding    (including   the    Convertible    Subordinated
                  Debentures),   measured  at  the  time  of  issuance  of  such
                  Subordinated Debt, does not exceed $700,000,000;

                           (viii)  Indebtedness  of the type described in clause
                  (h) of the definition of "Indebtedness" or clause (iii) of the
                  definition of "Contingent Obligations";

                           (ix)  Indebtedness  of Borrower and its  Subsidiaries
                  with  respect to surety,  appeal,  indemnity,  performance  or
                  other similar bonds in the ordinary course of business;

                           (x)  Indebtedness  of Borrower  and its  Subsidiaries
                  under initial or successive  refinancings of any  Indebtedness
                  permitted by clause (ii),  (iii) or (vi) above,  provided that
                  the principal  amount of any such  refinancing does not exceed
                  the principal amount of the Indebtedness being refinanced;

                           (xi)  Indebtedness  of Borrower and its  Subsidiaries
                  for trade  accounts  payable,  provided that (A) such accounts
                  arise in the  ordinary  course of business and (B) no material
                  part of such  account is more than  ninety  (90) days past due
                  (unless  subject to a bona fide dispute and for which adequate
                  reserves have been established);

                           (xii)  Indebtedness of Borrower and its  Subsidiaries
                  for expense accruals in the ordinary course of business;

                           (xiii) Guaranty Obligations or Contingent Obligations
                  of  Borrower  in  respect  of  Permitted  Indebtedness  of its
                  Subsidiaries or Guaranty Obligations or Contingent Obligations
                  of any Subsidiary of Borrower of the Permitted Indebtedness of
                  one or

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<PAGE>

                  more  other   Subsidiaries   of  Borrower   or  of   Permitted
                  Indebtedness of Borrower;

                           (xiv)  Indebtedness  of Borrower to any of Borrower's
                  Subsidiaries,  Indebtedness of any of Borrower's  Subsidiaries
                  to Borrower or Indebtedness of any of Borrower's  Subsidiaries
                  to any of Borrower's other Subsidiaries;

                           (xv) Indebtedness of Borrower and its Subsidiaries in
                  respect of any Permitted Receivables Facility;

                           (xvi)  Indebtedness of Borrower and its  Subsidiaries
                  under Synthetic Leases;

                           (xvii)  Indebtedness of Borrower and its Subsidiaries
                  incurred in connection  with  MKE-Quantum  and  constituting a
                  Permitted Investment; and

                           (xviii) Indebtedness of Borrower and its Subsidiaries
                  not otherwise permitted hereunder, provided that the aggregate
                  principal amount of all such  Indebtedness  does not exceed at
                  any time ten percent (10%) of the total assets of Borrower and
                  its  Subsidiaries  determined  as of the  end  of  the  fiscal
                  quarter immediately preceding the date of determination.

                  (b) Liens.  Neither Borrower nor any of its Subsidiaries shall
         create, incur, assume or permit to exist any Lien on or with respect to
         any of its assets or  property of any  character,  whether now owned or
         hereafter acquired, except for the following ("Permitted Liens"):

                           (i) Liens in favor of any Agent or any Bank  securing
                  the Obligations;

                           (ii) Liens listed in  Disclosure  Letter  existing on
                  the date of this Agreement;

                           (iii) Liens for taxes or other  governmental  charges
                  not at the  time  delinquent  or  thereafter  payable  without
                  penalty  or  being  contested  in good  faith,  provided  that
                  adequate   reserves   for  the  payment   thereof   have  been
                  established in accordance with GAAP;

                           (iv)  Liens  of  carriers,  warehousemen,  mechanics,
                  materialmen,  vendors,  and  landlords and other similar Liens
                  imposed by law incurred in the ordinary course of business for
                  sums (A) not  overdue  or (B) being  contested  in good  faith
                  provided that adequate  reserves for the payment  thereof have
                  been established in accordance with GAAP;

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<PAGE>
                           (v)    Deposits    under    workers'    compensation,
                  unemployment  insurance and social  security laws or to secure
                  the performance of bids,  tenders,  contracts  (other than for
                  the  repayment  of  borrowed  money) or  leases,  or to secure
                  statutory  obligations  of surety or appeal bonds or to secure
                  indemnity,  performance or other similar bonds in the ordinary
                  course of business;

                           (vi) Zoning restrictions,  easements,  rights-of-way,
                  title  irregularities  and other similar  encumbrances,  which
                  alone or in the aggregate are not substantial in amount and do
                  not materially  detract from the value of the property subject
                  thereto or interfere with the ordinary conduct of the business
                  of Borrower or any of its Subsidiaries;

                           (vii) Liens securing  Indebtedness  which constitutes
                  Permitted  Indebtedness  under  clause  (iii) of  Subparagraph
                  5.02(a) provided that, in each case, such Lien (A) covers only
                  those assets,  the  acquisition  of which was financed by such
                  Permitted Indebtedness  (together with accessions,  additions,
                  replacements and proceeds thereof),  and (B) secures only such
                  Permitted Indebtedness and any related obligations of Borrower
                  or any of its Subsidiaries;

                           (viii)  Liens  on  the  property  or  assets  of  any
                  Subsidiary  of  Borrower  in favor of  Borrower  or any  other
                  Subsidiary of Borrower;

                           (ix)  Banker's  Liens and  similar  Liens  (including
                  set-off rights) in respect of bank deposits;

                           (x) Liens incurred in connection  with the extension,
                  renewal  or  refinancing  of the  Indebtedness  secured by the
                  Liens  described in clause (ii) or (vii) above,  provided that
                  any extension,  renewal or replacement  Lien (A) is limited to
                  the property covered by the terms of the existing Lien and (B)
                  secures  Indebtedness  which is no  greater  in amount and has
                  material  terms  no  less  favorable  to the  Banks  than  the
                  Indebtedness secured by the existing Lien;

                           (xi) Liens on property  or assets of any  corporation
                  which becomes a Subsidiary of Borrower  after the date of this
                  Agreement,  provided that (A) such Liens exist at the time the
                  stock of such corporation is acquired by Borrower and (B) such
                  Liens were not created in contemplation of such acquisition by
                  Borrower;

                                       62
<PAGE>

                           (xii)  Judgement  Liens,  provided that such Liens do
                  not have a value in excess of  $10,000,000  or such  Liens are
                  released, stayed, vacated or otherwise dismissed within thirty
                  (30) days after issue or levy and, if so stayed,  such stay is
                  not thereafter removed;

                           (xiii) Rights of vendors or lessors under conditional
                  sale  agreements,  Capital  Leases  or other  title  retention
                  agreements,  provided  that,  in each  case,  (A) such  rights
                  secure or otherwise relate to Permitted Indebtedness, (B) such
                  rights  do not  extend to any  property  other  than  property
                  acquired  with the  proceeds  of such  Permitted  Indebtedness
                  (together  with   accessions,   additions,   replacements  and
                  proceeds  thereof)  and (C)  such  rights  do not  secure  any
                  Indebtedness other than such Permitted Indebtedness;

                           (xiv)   Liens  in  favor  of  customs   and   revenue
                  authorities  arising  as a matter of law to secure  payment of
                  customs duties and in connection with the importation of goods
                  in the ordinary  course of  Borrower's  and its  Subsidiaries'
                  businesses;

                           (xv)  Liens  on   insurance   proceeds  in  favor  of
                  insurance companies with respect to the financing of insurance
                  premiums;

                           (xvi) Liens in respect of any  Permitted  Receivables
                  Facility;

                           (xvii)  Liens  on cash or Cash  Equivalents  securing
                  reimbursement  obligations of Borrower under letters of credit
                  (other than any Letters of Credit) in an  aggregate  amount of
                  all  such   cash  and  Cash   Equivalents   does  not   exceed
                  $100,000,000;

                           (xviii) Liens securing  Indebtedness  and any related
                  obligations  of  Borrower  or any of  its  Subsidiaries  which
                  constitutes  Permitted  Indebtedness  under  clause  (xvi)  of
                  Subparagraph  5.02(a) (or  refinancings  of such  Indebtedness
                  under clause (x) of Subparagraph 5.02(a)),  provided that such
                  Lien covers only those assets subject to such Synthetic Leases
                  (together  with   accessions,   additions,   replacements  and
                  proceeds thereof);

                           (xix) Liens  securing any  obligations of Borrower or
                  any of its  Subsidiaries  under the Prior Credit  Agreement or
                  any   security   agreements,   pledge   agreements,   charges,
                  debentures,    agreements,    documents,    certificates    or
                  undertakings  entered into in connection therewith or pursuant
                  thereto; provided that Borrower,

                                       63
<PAGE>

                  its Subsidiaries and the agents and the banks that are a party
                  to the Prior Credit  Agreement shall use their best efforts to
                  terminate  any such  Liens  within  three  (3)  months  of the
                  Closing Date;

                           (xx)  Liens  incurred  in  connection   with  leases,
                  subleases,  licenses  and  sublicenses  granted to Persons not
                  interfering  in any  material  respect  with the  business  of
                  Borrower and its  Subsidiaries  and any interest or title of a
                  lessee or licensee under any such leases, subleases,  licenses
                  or sublicenses;

                           (xxi)  Liens  securing  Indebtedness  and any related
                  obligations  which  constitute  Permitted  Indebtedness  under
                  clause   (xvii)  of   Subparagraph   5.02(a)  or   Investments
                  constituting   Permitted  Investments  under  clause  (ix)  of
                  Subparagraph 5.02(d); and

                           (xxii)  Liens on the  property  or assets of Borrower
                  and  its  Subsidiaries  not  otherwise  permitted   hereunder,
                  provided  that  (A)  the  aggregate  principal  amount  of all
                  Indebtedness secured by such Liens does not exceed at any time
                  ten  percent  (10%) of the total  assets of  Borrower  and its
                  Subsidiaries  determined  as of the end of the fiscal  quarter
                  immediately  preceding the date of determination  and (B) such
                  Liens do not  encumber  current  assets  of  Borrower  and its
                  Subsidiaries in excess of $50,000,000.

                  (c)  Asset  Dispositions.  Neither  Borrower  nor  any  of its
         Subsidiaries  shall  Transfer  all or any of its  assets  or  property,
         whether now owned or hereafter acquired, except for the following:

                           (i) Transfers by Borrower and its Subsidiaries in the
                  ordinary course of their businesses;

                           (ii) Transfers of surplus,  damaged, worn or obsolete
                  assets  or   properties   or  Transfers  of  other  assets  or
                  properties which are promptly being replaced;

                           (iii) Transfers of assets on commercially  reasonable
                  terms or account  receivables  in connection  with a Permitted
                  Receivables  Facility by  Borrower  and its  Subsidiaries  (it
                  being  understood  that  any  determination  as to  whether  a
                  particular Transfer is on commercially  reasonable terms shall
                  take into  consideration  any larger  business  transaction to
                  which such particular Transfer is related);

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<PAGE>
                           (iv)  Transfers  by  Borrower  to any  of  Borrower's
                  Subsidiaries or by any of Borrower's  Subsidiaries to Borrower
                  or any of Borrower's other Subsidiaries;

                           (v)  Transfers  which  constitute  the  making  of or
                  liquidation of Permitted Investments;

                           (vi)  Transfers  in  connection   with   Indebtedness
                  permitted  pursuant to clause (iii) of  Subparagraph  5.02(a);
                  and

                           (vii)  Transfers of assets and property not otherwise
                  permitted hereunder,  provided that the aggregate value of all
                  such assets and  property  (based upon the greater of the fair
                  market  or  book  value  of  such  assets  and   property)  so
                  transferred in any period of four consecutive  fiscal quarters
                  does not exceed twenty  percent (20%) of Tangible Net Worth as
                  determined  as of the end of the  fiscal  quarter  immediately
                  preceding the date of determination.

                  (d) Mergers,  Acquisitions,  Etc.  Neither Borrower nor any of
         its Subsidiaries  shall consolidate with or merge into any other Person
         or permit any other Person to merge into it, except that:

                           (i) Any  Subsidiary  of  Borrower  may merge  into or
                  consolidate with any other Subsidiary of Borrower;

                           (ii) Any  Subsidiary  of  Borrower  may merge into or
                  consolidate  with  Borrower  provided  that  Borrower  is  the
                  surviving corporation;

                           (iii) Borrower may merge into or consolidate with any
                  other  Person,  provided  that (A)  Borrower is the  surviving
                  corporation  and (B)  immediately  after giving effect to such
                  merger or  consolidation  no Default or Event of Default shall
                  have occurred and be continuing; and

                           (iv) Any  Subsidiary  of  Borrower  may merge into or
                  consolidate   with  any  other   Person  to  the  extent  such
                  transaction   is  a   Transfer   otherwise   permitted   under
                  Subparagraph  5.02(c)  or an  Investment  otherwise  permitted
                  under Subparagraph 5.02(e) and immediately after giving effect
                  to such merger or consolidation no Default or Event of Default
                  shall have occurred and be continuing.

                  (e) Investments.  Neither Borrower nor any of its Subsidiaries
         shall   make  any   Investment   except   the   following   ("Permitted
         Investments"):

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                           (i)  Direct   obligations   of,  or  obligations  the
                  principal and interest on which are unconditionally guaranteed
                  by, the United States of America or  obligations of any agency
                  of the United States of America to the extent such obligations
                  are backed by the full  faith and credit of the United  States
                  of  America,  in each case  maturing  within one year from the
                  date of acquisition thereof;

                           (ii) Certificates of deposit maturing within one year
                  from the date of  acquisition  thereof  issued by a commercial
                  bank or trust company  organized  under the laws of the United
                  States  of  America  or a  state  thereof  or  that is a Bank,
                  provided  that (A) such deposits are  denominated  in Dollars,
                  (B) such  bank or  trust  company  has  capital,  surplus  and
                  undivided  profits of not less than  $100,000,000 and (C) such
                  bank or trust  company  has  certificates  of deposit or other
                  debt obligations rated at least A-1 (or its equivalent) by S&P
                  or P-1 (or its equivalent) by Moody's;

                           (iii) Open market  commercial  paper maturing  within
                  270 days  from the date of  acquisition  thereof  issued  by a
                  corporation  organized  under the laws of the United States of
                  America or a state thereof,  provided such commercial paper is
                  rated at least A-1 (or its  equivalent)  by S&P or P-1 (or its
                  equivalent) by Moody's;

                           (iv) Any  repurchase  agreement  entered  into with a
                  commercial  bank or trust company  organized under the laws of
                  the United  States of America or a state  thereof or that is a
                  Bank,  provided  that  (A)  such  bank or  trust  company  has
                  capital,  surplus  and  undivided  profits  of not  less  than
                  $100,000,000,  (B) such bank or trust company has certificates
                  of deposit or other  debt  obligations  rated at least A-1 (or
                  its  equivalent) by S&P or P-1 (or its equivalent) by Moody's,
                  (C) the  repurchase  obligations of such bank or trust company
                  under  such  repurchase  agreement  are  fully  secured  by  a
                  perfected security interest in a security or instrument of the
                  type described in clause (i), (ii) or (iii) above and (D) such
                  security or instrument so securing the repurchase  obligations
                  has a fair market value at the time such repurchase  agreement
                  is entered into of not less than one hundred percent (100%) of
                  such repurchase obligations;

                           (v) Any transaction permitted by Subparagraph 5.02(a)
                  or Subparagraph 5.02(d);

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<PAGE>

                           (vi) Money market  mutual funds  registered  with the
                  Securities and Exchange  Commission,  meeting the requirements
                  of Rule 2a-7 promulgated  under the Investment  Company Act of
                  1940;

                           (vii)  Investments  listed in the  Disclosure  Letter
                  existing on the date of this Agreement;

                           (viii)   Investments   in   other   assets   properly
                  classified  as  "marketable  securities"  or  "cash"  or "cash
                  equivalents"  under GAAP,  and which conform to the investment
                  policies  adopted by the Board of Directors  of Borrower  from
                  time to time;

                           (ix) (A)  Investments  in  MKE-Quantum in the form of
                  (w) non-exclusive  licenses of technology to  MKE-Quantum, (x)
                  tax or other  indemnity  obligations of Borrower or any of its
                  Subsidiaries  in favor of  MKE-Quantum,  (y) advances  against
                  product to be purchased by Borrower or any of its Subsidiaries
                  from MKE-Quantum  within a period of one year from the date of
                  the  making  of the  advance,  and (z) (1)  the  value  of any
                  property  transferred or leased to  MKE-Quantum,  (2) employee
                  benefit  obligations of Borrower or any of its Subsidiaries in
                  favor of any  employees of  MKE-Quantum,  (3) the value of the
                  administrative  services  provided  by  Borrower or any of its
                  Subsidiaries  in favor  of  MKE-Quantum,  (4) the value of any
                  personnel   services  provided  by  Borrower  or  any  of  its
                  Subsidiaries in favor of MKE-Quantum, and (5) the value of the
                  use and  occupancy of any  facilities  provided by Borrower or
                  any of its  Subsidiaries,  in the case of each of (1)  through
                  (5) above, to the extent  Borrower or any of its  Subsidiaries
                  is, or expects to be, reimbursed therefor,  within one year of
                  when  such  value  is  provided   to  MKE-Quantum,   and   (B)
                  additional  Investments  in  MKE-Quantum,  provided  that  the
                  aggregate  amount  of all such  Investments  made or  incurred
                  after the Closing Date  pursuant to the  subclause (B) of this
                  clause  (ix) in any  rolling  four  fiscal  quarter  period of
                  Borrower  does not  exceed  the sum of  $100,000,000  plus any
                  amounts   actually   received   by  Borrower  or  any  of  its
                  Subsidiaries as a return of Investments in MKE-Quantum  during
                  such rolling four quarter  period plus any  reductions  in the
                  primary  obligations  in underlying  Investments  constituting
                  Guaranty  Obligations  during such rolling four fiscal quarter
                  period; provided further that for purposes hereof, Investments
                  constituting  Indebtedness of MKE-Quantum acquired by Borrower
                  or any of its Subsidiaries  shall be deemed to be in an amount
                  equal  to  such   Indebtedness   and  to  be  made  when  such
                  Indebtedness is acquired (unless such

                                       67
<PAGE>

                  Investment  is a  primary  obligation  underlying  a  Guaranty
                  Obligation   previously   counted   as  an   Investment)   and
                  Investments  constituting Guaranty Obligations shall be deemed
                  to  be  in  an  amount  equal  to  the  corresponding  primary
                  obligations   and  to  be  made  at  the  time  such   primary
                  obligations are incurred;

                           (x)   Investments   received  by  Borrower   and  its
                  Subsidiaries    in   connection   with   the   bankruptcy   or
                  reorganization of customers and suppliers and in settlement of
                  delinquent  obligations of, and other disputes with, customers
                  and suppliers arising in the ordinary course of business;

                           (xi)  Investments  arising  from  rights  received by
                  Borrower and its Subsidiaries upon the required payment of any
                  permitted   Contingent   Obligations   of  Borrower   and  its
                  Subsidiaries;

                           (xii)  Investments  in or to  Borrower or any Wholly-
                  Owned Subsidiary of Borrower;

                           (xiii)  Investments  of any  Subsidiary  of  Borrower
                  existing  at the time it  becomes  a  Subsidiary  of  Borrower
                  provided that such  Investments  were not made in anticipation
                  of such Person becoming a Subsidiary of Borrower;

                           (xiv) Investments  received by Borrower or any of its
                  Subsidiaries  as  consideration  in connection  with Transfers
                  otherwise permitted under Subparagraph 5.02(c);

                           (xv)   Investments  in  the  nature  of  acquisitions
                  provided that the aggregate amount of such acquisitions in any
                  period of four  consecutive  fiscal  quarters  does not exceed
                  twenty percent (20%) of Tangible Net Worth as determined as of
                  the  fiscal   quarter   immediately   preceding  the  date  of
                  determination;

                           (xvi)  Investments  consisting of loans to employees,
                  officers and directors, the proceeds of which shall be used to
                  purchase equity securities of Borrower or its Subsidiaries and
                  other loans to employees, officers and directors;

                           (xvii)  Investments of Borrower and its  Subsidiaries
                  in  interest  rate  protection,   currency  swap  and  foreign
                  exchange arrangements, provided that all such arrangements are
                  entered into in connection  with bona fide hedging  operations
                  and not for speculation;

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<PAGE>

                           (xviii) Deposit accounts; and

                           (xix)  Investments  (other than of the type set forth
                  in clause  (xiv)  above) not  otherwise  permitted  hereunder,
                  provided that the aggregate  amount of such other  Investments
                  made  after  the  Closing   Date  (less  any  return  of  such
                  Investment)  does not exceed twenty  percent (20%) of Tangible
                  Net Worth as determined as of the fiscal  quarter  immediately
                  preceding the date of determination.

                  (f) Dividends,  Redemptions,  Etc. Neither Borrower nor any of
         its Subsidiaries  shall pay any dividends or make any  distributions on
         its Equity Securities;  purchase,  redeem, retire, defease or otherwise
         acquire for value any of its Equity  Securities;  return any capital to
         any holder of its Equity  Securities as such; make any  distribution of
         assets,  Equity Securities,  obligations or securities to any holder of
         its  Equity  Securities  as  such;  or set  apart  any sum for any such
         purpose, except as follows:

                           (i)  Borrower   may  pay   dividends  on  its  Equity
                  Securities payable solely in Borrower's own Equity Securities;

                           (ii) Borrower may purchase,  redeem,  retire, defease
                  or otherwise acquire for value Equity Securities in connection
                  with or pursuant to any of its  Employee  Benefit  Plans or in
                  connection  with the employment or compensation of officers or
                  directors;

                           (iii) Borrower may purchase,  redeem, retire, defease
                  or  otherwise  acquire for value  Equity  Securities  with the
                  proceeds received from a substantially concurrent issue of new
                  Equity Securities or with other Equity Securities;

                           (iv) Borrower may purchase Equity Securities pursuant
                  to stock  repurchase  programs  provided  that  the  aggregate
                  payments  under such  programs do not exceed ten percent (10%)
                  of Tangible Net Worth in any fiscal year as  determined  as of
                  the  fiscal   quarter   immediately   preceding  the  date  of
                  determination;

                           (v)  Borrower  may  distribute  rights  pursuant to a
                  shareholder  rights plan or redeem such rights  provided  such
                  redemption is in accordance with the terms of such shareholder
                  rights plan;

                           (vi) Any  Subsidiary of Borrower may pay dividends or
                  make distributions to Borrower or any Wholly-Owned  Subsidiary
                  of Borrower;

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<PAGE>

                           (vii) Any  Subsidiary  of Borrower  may  purchase and
                  redeem shares of their own Equity  Securities from Borrower or
                  any Wholly-Owned Subsidiary of Borrower; or

                           (viii) Any  Subsidiary of Borrower may declare or pay
                  any dividends in respect of its Equity  Securities or purchase
                  or  redeem   shares   of  its   Equity   Securities   or  make
                  distributions   to   shareholders   not  otherwise   permitted
                  hereunder   provided  that  the   aggregate   amount  paid  or
                  distributed  in  any  period  of  four  consecutive   quarters
                  (excluding any amounts covered by clauses (vi) or (vii) above)
                  does not exceed five  percent  (5%) of  Tangible  Net Worth as
                  determined as of the fiscal quarter immediately  preceding the
                  date of determination.

                  (g)  Change  in  Business.  Neither  Borrower  nor  any of its
         Subsidiaries  shall  engage,  either  directly  or  indirectly  through
         Affiliates,  in any line of  business  other than the  digital  storage
         business,  any other business incidental or reasonably related thereto,
         or any businesses  that are, as determined by the Board of Directors of
         Borrower, appropriate extensions thereof.

                  (h) Certain Indebtedness  Payments,  Etc. Neither Borrower nor
         any of its Subsidiaries shall pay, prepay, redeem, purchase, defease or
         otherwise  satisfy in any manner prior to the scheduled payment thereof
         any  Subordinated  Debt  except  as  otherwise   permitted  under  this
         Subparagraph  5.02(h);  amend,  modify or otherwise change the terms of
         any document, instrument or agreement evidencing Subordinated Debt such
         that  such  amendment,  modification  or  change  would  (i)  cause the
         outstanding aggregate principal amount of all such Subordinated Debt so
         amended,  modified or changed to be increased as a consequence  of such
         amendment,   modification  or  change,  (ii)  cause  the  subordination
         provisions applicable to such Subordinated Debt to be less favorable to
         the  Agents  and the Bank  Parties  than  those set forth on Exhibit F,
         (iii) increase the interest rate applicable  thereto or (iv) accelerate
         the  scheduled  payment  thereof,  except  that  Borrower  may call for
         redemption   the   entire   outstanding   amount  of  the   Convertible
         Subordinated   Debentures   and,   to  the  extent   such   Convertible
         Subordinated Debentures are not converted prior to the redemption date,
         redeem such Convertible Subordinated  Debentures,  provided that (A) no
         Default or Event of Default has  occurred  and is  continuing  or would
         result from such call for  redemption or redemption and (B) the closing
         price of the  common  stock  shall have  exceeded  one  hundred  twenty
         percent (120%) of the then applicable  conversion price for twenty (20)
         trading  days within a period of thirty (30)  consecutive  trading days
         ending within five (5) trading days prior to the notice of

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<PAGE>

         redemption.  Borrower shall not cause or permit any of its obligations,
         except the obligations  constituting  Senior Indebtedness to constitute
         "Designated  Senior  Indebtedness"  under the  Indenture  governing the
         Convertible  Subordinated  Debentures  (it  being  understood  that the
         Obligations  of  Borrower  under  this  Agreement  shall  at all  times
         constitute "Designated Senior Indebtedness").

                  (i) ERISA.  Neither Borrower nor any ERISA Affiliate shall (i)
         adopt or institute any defined benefit Employee Benefit Plan that is an
         employee  pension  benefit  plan within the meaning of Section  3(2) of
         ERISA,  (ii)  take any  action  which  will  result in the  partial  or
         complete  withdrawal,  within the meanings of sections 4203 and 4205 of
         ERISA, from a Multiemployer  Plan, (iii) engage or permit any Person to
         engage in any transaction prohibited by section 406 of ERISA or section
         4975 of the Code involving any Employee  Benefit Plan or  Multiemployer
         Plan which would subject either  Borrower or any ERISA Affiliate to any
         tax,  penalty or other  liability  including a liability to  indemnify,
         (iv) incur or allow to exist any accumulated funding deficiency (within
         the  meaning  of  section  412 of the Code or  section  302 of  ERISA),
         excluding all extensions permitted by law or contract, (v) fail to make
         full  payment  when  due of all  amounts  due as  contributions  to any
         Employee Benefit Plan or  Multiemployer  Plan, (vi) fail to comply with
         the  requirements  of section 4980B of the Code or Part 6 of Title I(B)
         of ERISA,  or (vii) adopt any  amendment to any  Employee  Benefit Plan
         which  would  require  the  posting  of  security  pursuant  to section
         401(a)(29) of the Code,  if any of such actions or inactions  described
         in clauses (i) - (vii), either individually or cumulatively, would have
         a Material Adverse Effect.

                  (j) Transactions With Affiliates.  Neither Borrower nor any of
         its Subsidiaries  shall enter into any Contractual  Obligation with any
         Affiliate or engage in any other  transaction with any Affiliate except
         upon terms at least as favorable to Borrower or such  Subsidiary  as an
         arms-length transaction with unaffiliated Persons.

                  (k)  Accounting  Changes.  Neither  Borrower  nor  any  of its
         Subsidiaries  shall  change (i) its fiscal  year  (currently  April 1 -
         March 31) or (ii) its accounting practices except as permitted by GAAP.

                  (l) Financial Covenants.

                           (i)  Borrower  shall not permit its Quick Ratio to be
                  less than 1.00 to 1.00 on the last day of each fiscal quarter.

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<PAGE>

                           (ii) Borrower shall not permit its Tangible Net Worth
                  on any date of  determination  (such  date to be  referred  to
                  herein as a "determination date") which occurs after March 31,
                  1997 (such date to be referred  to herein as the "base  date")
                  to be less  than  the sum on  such  determination  date of the
                  following:

                                    (A) $760,000,000;

                                                  plus

                                    (B) Seventy-five percent (75%) of the sum of
                           Borrower's    consolidated   quarterly   net   income
                           (ignoring  any  quarterly  losses)  for each  quarter
                           after the base date through and including the quarter
                           ending immediately prior to the determination date;

                                                  plus

                                    (C)  Seventy-Five  percent  (75%) of the Net
                           Proceeds of all Equity  Securities issued by Borrower
                           and its  Subsidiaries  (excluding  any issuance where
                           the total proceeds are less than $10,000,000)  during
                           the period  commencing on the base date and ending on
                           the determination date;

                                                  plus

                                    (D) Ninety percent (90%) of the Net Proceeds
                           derived  from  the  conversion  of  the   Convertible
                           Subordinated Debentures;

                                                  minus

                                    (E) the lesser of (1) the  aggregate  amount
                           paid by Borrower to repurchase  its capital stock and
                           (2) $50,000,000.

                           (iii)  In  any   consecutive   four-quarter   period,
                  Borrower  shall not  permit  (A) more than two  quarterly  net
                  losses  aggregating  to more  than  five  percent  (5%) of its
                  Tangible  Net Worth as  determined  as of the  fiscal  quarter
                  immediately  preceding  the date of  determination  or (B) its
                  cumulative net income for any consecutive  four-quarter period
                  to be less than one Dollar.

                           (iv) Borrower shall not permit its Senior Funded Debt
                  Ratio  on the  last  day  of  any  fiscal  quarter  to  exceed
                  thirty-five percent (35%).

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<PAGE>

SECTION VI.  DEFAULT.

         6.01. Events of Default. The occurrence or existence of any one or more
of the following shall constitute an "Event of Default" hereunder:

                  (a)  Borrower  (i)  shall  fail to pay when due any  principal
         payment on the Revolving Loans or any Reimbursement Payment, (ii) shall
         fail to pay within three (3) Business  Days when due any  interest,  or
         (iii) shall fail to pay when due any other payment  required  under the
         terms of this  Agreement  or any of the other Loan  Documents  and such
         failure shall  continue for five (5) Business Days after notice thereof
         has been given to Borrower by any Agent; or

                  (b)  Borrower  shall fail to observe or perform any  covenant,
         obligation, condition or agreement set forth in Paragraph 5.02; or

                  (c)  Borrower  shall  fail to  observe  or  perform  any other
         covenant,   obligation,   condition  or  agreement  contained  in  this
         Agreement or the other Loan  Documents and such failure shall  continue
         for twenty  (20)  Business  Days after the  earlier of the date that an
         Executive Officer of Borrower first obtains knowledge or notice of such
         failure or the date Administrative  Agent gives Borrower notice of such
         failure; or

                  (d) Any written  representation  or  warranty by the  Borrower
         made or deemed made herein or in any Loan Document  shall prove to have
         been false, incorrect or inaccurate in any material respect on or as of
         the date made or deemed made; or

                  (e) (i) Borrower or any of Borrower's  Subsidiaries  (A) shall
         fail to make a payment or payments in an aggregate amount of $2,500,000
         or more when due under the terms of any Funded  Debt to be paid by such
         Person  (excluding this Agreement and the other Credit Documents or any
         intercompany Indebtedness between Borrower and any of its Subsidiaries,
         but including any other evidence of  indebtedness of Borrower or any of
         its  Subsidiaries  to any Bank) and such failure shall continue  beyond
         any period of grace provided with respect thereto, or (B) shall fail to
         make any other payment or payments when due under or otherwise  default
         in the  observance  or  performance  of any  other  agreement,  term or
         condition  contained  in any such Funded  Debt,  and the effect of such
         failure or default is to cause, or permit the holder or holders thereof
         to cause, indebtedness in an aggregate amount of $10,000,000 or more to
         become due prior to its stated  date of  maturity;  or (ii) there shall
         occur or exist any other event or condition  which  causes,  or permits
         the

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<PAGE>
         holder or holders of such  indebtedness  to cause,  indebtedness  in an
         aggregate  amount of  $10,000,000  or more to  become  due prior to its
         stated  date  of  maturity  (whether  through  holder  puts,  mandatory
         redemptions or prepayments or otherwise); or

                  (f)  Borrower  or  any  of  Borrower's  Material  Subsidiaries
         (except  with  respect  to  clause  (v)  below)  shall (i) apply for or
         consent  to the  appointment  of a  receiver,  trustee,  liquidator  or
         custodian of itself or of all or a  substantial  part of its  property,
         (ii) be unable,  or admit in writing  its  inability,  to pay its debts
         generally  as they  mature,  (iii)  make a general  assignment  for the
         benefit of its or any of its creditors, (iv) be dissolved or liquidated
         in full or in part, (v) no longer be Solvent, (vi) commence a voluntary
         case or other proceeding seeking  liquidation,  reorganization or other
         relief  with  respect  to  itself or its  debts  under any  bankruptcy,
         insolvency  or other  similar law now or hereafter in effect or consent
         to any such relief or to the appointment of or taking possession of its
         property by any  official in an  involuntary  case or other  proceeding
         commenced  against  it, or (vii)  take any  action  for the  purpose of
         effecting any of the foregoing; or

                  (g) Proceedings  for the  appointment of a receiver,  trustee,
         liquidator  or  custodian  of  Borrower or any of  Borrower's  Material
         Subsidiaries or of all or a substantial  part of the property  thereof,
         or an  involuntary  case  or  other  proceedings  seeking  liquidation,
         reorganization  or other  relief  with  respect to  Borrower  or any of
         Borrower's  Material  Subsidiaries  or  the  debts  thereof  under  any
         bankruptcy,  insolvency or other similar law now or hereafter in effect
         shall be commenced and an order for relief  entered or such  proceeding
         shall  not be  dismissed  or  discharged  within  sixty  (60)  days  of
         commencement; or

                  (h) A final nonappealable judgment or order for the payment of
         money in excess of $10,000,000  (exclusive of amounts which are covered
         by insurance issued by an insurer satisfying the requirements set forth
         in Subparagraph  5.01(d)) shall be rendered  against Borrower or any of
         its Subsidiaries and the same shall remain  undischarged and unpaid for
         a period  of thirty  (30)  days  during  which  execution  shall not be
         effectively stayed; or

                  (i) Any Credit  Document or any material  term  thereof  shall
         cease to be, or be asserted by Borrower  not to be, a legal,  valid and
         binding  obligation  of Borrower  enforceable  in  accordance  with its
         terms,  the effect of which is or could reasonably be expected to be to
         interfere with,  hinder or impair in any material respect the practical
         or effective realization of the rights, benefits or remedies of the

                                       74
<PAGE>

         Agents or the Banks under any Credit Documents taken as a whole; or

                  (j) Any Reportable Event occurs which constitutes  grounds for
         the  termination  of any  Employee  Benefit Plan by the PBGC or for the
         appointment of a trustee by the PBGC to administer any Employee Benefit
         Plan, or any Employee  Benefit Plan shall be  terminated  with unfunded
         liabilities  within the meaning of Title IV of ERISA or a trustee shall
         be appointed by the PBGC to  administer  any Employee  Benefit Plan, in
         each case which could reasonably be expected to have a Material Adverse
         Effect; or

                  (k) Any Change of Control shall occur.

(Any of the events or conditions set forth in Subparagraphs  6.01(a)-(k),  prior
to the giving of any required  notice or the  expiration of any specified  grace
period, shall constitute a "Default" hereunder.)

         6.02.  Remedies.  Upon the  occurrence  or  existence  of any  Event of
Default (other than an Event of Default  referred to in Subparagraph  6.01(f) or
6.01(g))  and at any time  thereafter  during the  continuance  of such Event of
Default,  Administrative  Agent may, with the consent of the Majority  Banks, or
shall, upon instructions from the Majority Banks, by written notice to Borrower,
(a) terminate the  Commitments and the obligations of the Lender Parties to make
Revolving  Loans  or  issue  Letters  of  Credit  (b)  declare  all  outstanding
Obligations  payable by  Borrower  to be  immediately  due and  payable  without
presentment,  demand,  protest or any other notice of any kind, all of which are
hereby  expressly  waived,  anything  contained  herein  or in the  Notes to the
contrary   notwithstanding,   and/or   (c)   direct   Borrower   to  deliver  to
Administrative  Agent funds in an amount equal to the aggregate stated amount of
all outstanding Letters of Credit. Upon the occurrence or existence of any Event
of Default described in Subparagraph 6.01(f) or 6.01(g), immediately and without
notice,  (1) the  Commitments  and the obligations of the Lender Parties to make
Revolving Loans or issue Letters of Credit shall automatically terminate and (2)
all outstanding  Obligations  payable by Borrower hereunder shall  automatically
become immediately due and payable, without presentment,  demand, protest or any
other notice of any kind,  all of which are hereby  expressly  waived,  anything
contained herein or in the Notes to the contrary notwithstanding. In addition to
the  foregoing  remedies,  upon the  occurrence  or  existence  of any  Event of
Default,  Administrative Agent may exercise any right, power or remedy permitted
to it by law, either by suit in equity or by action at law, or both. Immediately
after taking any action under this Paragraph  6.02,  Administrative  Agent shall
notify each Bank Party of such action.

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SECTION VII.   AGENTS AND RELATIONS AMONG BANKS.

         7.01.  Appointment,  Powers  and  Immunities.  Each Bank  Party  hereby
appoints and authorizes  Administrative Agent and the Co-Arrangers to act as its
agents  hereunder and under the other Credit  Documents  with such powers as are
expressly delegated to Administrative Agent and the Co-Arrangers by the terms of
this Agreement and the other Credit  Documents,  together with such other powers
as are  reasonably  incidental  thereto.  Neither  Administrative  Agent nor any
Co-Arranger shall have any duties or responsibilities except those expressly set
forth in this  Agreement or in any other Credit  Document,  be a trustee for any
Bank  Party  or have  any  fiduciary  duty to any  Bank  Party.  Notwithstanding
anything to the contrary contained herein,  neither Administrative Agent nor any
Co-Arranger  shall be  required  to take any action  which is  contrary  to this
Agreement or any other Credit Document or applicable law. Neither Administrative
Agent nor any  Co-Arranger  nor any Bank Party shall be responsible to any other
Agent or Bank Party for any recitals, statements,  representations or warranties
made by Borrower  contained in this  Agreement or in any other Credit  Document,
for  the  value,  validity,   effectiveness,   genuineness,   enforceability  or
sufficiency of this  Agreement,  or any other Credit Document or for any failure
by Borrower to perform its obligations  hereunder or thereunder.  Administrative
Agent and the Co-Arrangers may employ agents and attorneys-in-fact and shall not
be  responsible  to any Bank Party for the  negligence or misconduct of any such
agents or  attorneys-in-fact  selected by them with reasonable care. None of the
Administrative Agent, the Co-Arrangers or their directors,  officers,  employees
or agents shall be responsible to any Bank Party for any action taken or omitted
to be taken by it or them  hereunder  or under any other  Credit  Document or in
connection  herewith or therewith,  except for its or their own gross negligence
or willful  misconduct.  Except as  otherwise  provided  under  this  Agreement,
Administrative Agent shall take such action with respect to the Credit Documents
as shall be directed by the Majority Banks.  Administrative Agent shall promptly
furnish  to  each  Bank  Party  copies  of  all  material  documents,   reports,
certificates, financial statements and notices furnished to Administrative Agent
by Borrower; provided, however, that Administrative Agent shall not be liable to
any Bank Party for its  failure to provide  copies of such  material  documents,
reports,  certificates,  financial  statements  and notices  unless such failure
constitutes gross negligence or willful misconduct by Administrative Agent.

         7.02.  Reliance by Agents.  Administrative  Agent and the  Co-Arrangers
shall  be  entitled  to rely  upon any  certificate,  notice  or other  document
(including  any cable,  telegram,  facsimile or telex)  believed by them in good
faith to be genuine  and correct and to have been signed or sent by or on behalf
of the proper Person or Persons, and upon advice and statements of

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legal  counsel,   independent   accountants   and  other  experts   selected  by
Administrative  Agent and the Co-Arrangers with reasonable care. As to any other
matters not expressly  provided for by this  Agreement,  neither  Administrative
Agent nor any  Co-Arranger  shall be required to take any action or exercise any
discretion, but Administrative Agent shall be required to act or to refrain from
acting upon  instructions  of the Majority Banks and shall in all cases be fully
protected by the Bank Parties in acting, or in refraining from acting, hereunder
or under any other Credit  Document in accordance  with the  instructions of the
Majority Banks, and such instructions of the Majority Banks and any action taken
or failure to act pursuant thereto shall be binding on the Administrative  Agent
and all of the Co-Arrangers and Bank Parties.

         7.03. Defaults.  Neither Administrative Agent nor any Co-Arranger shall
be deemed to have  knowledge or notice of the occurrence of any Default or Event
of Default  unless  Administrative  Agent and the  Co-Arrangers  have received a
notice from a Bank Party or Borrower,  referring to this  Agreement,  describing
such  Default or Event of Default and  stating  that such notice is a "Notice of
Default".  If Administrative Agent receives such a notice of the occurrence of a
Default or Event of  Default,  Administrative  Agent  shall give  prompt  notice
thereof to the  Co-Arrangers  and the Bank Parties.  Administrative  Agent shall
take such  action with  respect to such  Default or Event of Default as shall be
reasonably  directed  by the  Majority  Banks;  provided,  however,  that  until
Administrative  Agent shall have received such directions,  Administrative Agent
may (but shall not be  obligated  to) take such  action,  or refrain from taking
such  action,  with respect to such Default or Event of Default as it shall deem
advisable in the best interest of the Bank Parties.

         7.04.  Indemnification.  Without  limiting the  Obligations of Borrower
hereunder,   each  Bank  agrees  to  indemnify   Administrative  Agent  and  the
Co-Arrangers,  ratably in accordance with such Bank's  Proportionate  Share, for
any and all  liabilities,  obligations,  losses,  damages,  penalties,  actions,
judgments,  suits,  costs,  expenses  or  disbursements  of any  kind or  nature
whatsoever  which may at any time be imposed on, incurred by or asserted against
Administrative  Agent and the Co-Arrangers in any way relating to or arising out
of this  Agreement  or any  documents  contemplated  by or referred to herein or
therein or the transactions contemplated hereby or thereby or the enforcement of
any of the terms  hereof or thereof or of any such  other  documents;  provided,
however,  that no Bank  shall be liable for any of the  foregoing  to the extent
they arise from  Administrative  Agent and/or the Co-Arrangers' gross negligence
or willful misconduct.  Administrative Agent and the Co-Arrangers shall be fully
justified in refusing to take or to continue to take any action hereunder unless
it shall first be indemnified to its  satisfaction  by the Banks against any and
all liability and

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<PAGE>

expense  which may be incurred by it by reason of taking or  continuing  to take
any such action.  The  obligations  of each Bank under this Paragraph 7.04 shall
survive the payment and performance of the Obligations,  the termination of this
Agreement and any Bank ceasing to be a party to this Agreement.

         7.05.   Non-Reliance.   Each  Bank  Party   represents   that  it  has,
independently and without reliance on  Administrative  Agent, any Co-Arranger or
any other Bank Party,  and based on such  documents  and  information  as it has
deemed  appropriate,  made its own  appraisal  of the  financial  condition  and
affairs of Borrower and the Subsidiaries and its own decision to enter into this
Agreement  and agrees  that it will,  independently  and without  reliance  upon
Administrative  Agent,  any  Co-Arranger  or any Bank  Party,  and based on such
documents and information as it shall deem appropriate at the time,  continue to
make its own  appraisals and decisions in taking or not taking action under this
Agreement.  Neither  Administrative Agent nor any Co-Arranger nor any Bank Party
shall be  required  to keep any other  Agent or Bank  Party  informed  as to the
performance  or observance by Borrower or its  Subsidiaries  of the  obligations
under this Agreement or any other document referred to or provided for herein or
to make inquiry of, or to inspect the  properties  or books of Borrower.  Except
for notices,  reports and other documents and information  expressly required to
be furnished  to the Bank Parties by  Administrative  Agent  hereunder,  neither
Administrative  Agent nor any Co-Arranger nor any Bank Party shall have any duty
or  responsibility  to provide  any Agent or Bank Party with any credit or other
information  concerning  Borrower or its  Subsidiaries,  which may come into the
possession of any Agent or Bank Party or any of its or their Affiliates.

         7.06.  Resignation or Removal of Administrative  Agent.  Subject to the
appointment  and  acceptance  of a  successor  Administrative  Agent as provided
below,  Administrative  Agent may resign at any time by giving notice thereof to
the Banks, and  Administrative  Agent may be removed at any time with or without
cause by the Majority Banks. Upon any such resignation or removal,  the Majority
Banks shall have the right to appoint a successor  Administrative  Agent,  which
Administrative Agent shall be reasonably acceptable to Borrower. If no successor
Administrative  Agent shall have been  appointed by the Majority Banks and shall
have  accepted  such  appointment  within  thirty  (30) days after the  retiring
Administrative  Agent's giving of notice of  resignation or the Majority  Banks'
removal of the retiring  Administrative Agent, then the retiring  Administrative
Agent may, on behalf of the Bank  Parties,  appoint a  successor  Administrative
Agent, which shall be (a) a bank having a combined capital, surplus and retained
earnings  of not  less  than  U.S.  $500,000,000  and (b)  shall  be  reasonably
acceptable to Borrower;  provided, however, that Borrower shall have no right to
approve a successor  Agent  which is a Bank if an Event of Default has  occurred
and is

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<PAGE>

continuing.  Upon the  acceptance of any  appointment  as  Administrative  Agent
hereunder by a successor  Administrative  Agent,  such successor  Administrative
Agent shall thereupon succeed to and become vested with all the rights,  powers,
privileges  and duties of the retiring  Administrative  Agent,  and the retiring
Administrative  Agent  shall be  discharged  from  its  duties  and  obligations
hereunder.  After any retiring  Administrative  Agent's  resignation  or removal
hereunder as  Administrative  Agent,  the  provisions  of this Section VII shall
continue in effect for its benefit in respect of any actions taken or omitted to
be taken by it while it was acting as Administrative Agent.

         7.07. Removal of Co-Arrangers. If, at any time, any Co-Arranger's share
of the total credit facilities  provided by all Banks hereunder is less than six
and one-quarter  percent  (6.25%),  such  Co-Arranger may be removed by Borrower
upon thirty (30) days prior written notice from Borrower to Administrative Agent
and such  Co-Arranger.  Upon any such removal,  Borrower shall, at its election,
have the right to appoint another Bank as successor to such removed Co-Arranger,
which  successor  Co-Arranger  shall be  reasonably  acceptable  to the Majority
Banks. If no successor Co-Arranger is appointed for any removed Co-Arranger, all
rights,  powers and privileges vested in the Agents hereunder shall be exercised
by Administrative  Agent and the remaining Co-Arranger(s)  or, if no Co-Arranger
remains,  by Administrative  Agent alone. Upon the acceptance of any appointment
as  a  Co-Arranger  hereunder  by  a  successor   Co-Arranger,   such  successor
Co-Arranger  shall  thereupon  succeed to and become vested with all the rights,
powers,  privileges  and  duties of the  removed  Co-Arranger,  and the  removed
Co-Arranger shall be discharged from its duties and obligations hereunder. After
any  Co-Arranger's  removal  hereunder as a Co-Arranger,  the provisions of this
Section  VII shall  continue in effect for its benefit in respect of any actions
taken or omitted to be taken by it while it was acting as a Co-Arranger. For the
purposes of this  Paragraph  7.07,  a  Co-Arranger's  share of the total  credit
facilities provided by all Banks hereunder at any time shall be (a) if Revolving
Loans are then outstanding,  (i) the aggregate principal amount of all Revolving
Loans then outstanding, together with the aggregate stated amount of all Letters
of  Credit  then  outstanding,  which  are  held  by  such  Co-Arranger  and its
Affiliates  as a Bank or as  Banks  hereunder,  divided  by (ii)  the  aggregate
principal  amount of all  Revolving  Loans then  outstanding,  together with the
aggregate stated amount of all Letters of Credit then  outstanding,  held by all
Banks  or  (b)  if no  Revolving  Loans  are  then  outstanding,  the  aggregate
Proportionate  Share at such time of such  Co-Arranger  and its  Affiliates as a
Bank or as Banks hereunder.

         7.08.  Authorization.  Administrative Agent is hereby authorized by the
Bank Parties to execute, deliver and perform,

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<PAGE>

each of the Credit Documents to which  Administrative Agent is or is intended to
be a party and each Bank Party agrees,  subject to the terms of this  Agreement,
to be bound by all of the agreements of  Administrative  Agent  contained in the
Credit Documents.

         7.09.  Agents  in  Their  Individual  Capacities.  Each  Agent  and its
affiliates may make loans to, accept  deposits from and generally  engage in any
kind of business with  Borrower and its  Subsidiaries  and  affiliates as though
such Agent were not an Agent hereunder. With respect to Revolving Loans made and
Letters of Credit  issued by ABN and CIBC as Banks,  ABN and CIBC shall have the
same rights and powers under this  Agreement  and the other Credit  Documents as
any other Bank Party and may exercise the same as though they were not Agents.

         7.10. Agents'  Communications  Binding Upon Banks. Subject to the terms
of this  Agreement,  the Bank  Parties  agree that written  communications  from
Administrative  Agent and the Co-Arrangers  to  Borrower  on  behalf of the Bank
Parties shall be binding upon the Bank Parties.

         7.11. No Obligations of Borrower. Nothing contained in this Article VII
shall be deemed to impose upon Borrower any obligation in respect of the due and
punctual  performance by any Agent of its  obligations to the Bank Parties under
any  provision of this  Agreement,  and Borrower  shall have no liability to any
Agent or Bank  Party in  respect  of any  failure  by any Agent or Bank Party to
perform any of their respective  obligations to each other under this Agreement.
Without limiting the generality of the foregoing  sentence,  where any provision
of this Agreement relating to the payment of any amounts due and owing under the
Loan  Documents  provides  that such  payments  shall be made by Borrower to the
Administrative Agent for the account of the Bank Parties, Borrower's obligations
to the Bank Parties in respect of such payments  shall be deemed to be satisfied
upon the making of such payments to Administrative  Agent in the manner provided
by this Agreement.

         7.12.  Co-Agents and Documentation  Agent. None of the Banks identified
herein as a "co-agent" or as  Documentation  Agent shall have any right,  power,
obligation, liability,  responsibility or duty under this Agreement or any other
Credit  Document  other  than  those  applicable  to all Banks as such.  Without
limiting the  foregoing,  none of the Banks so  identified as a "co-agent" or as
Documentation  Agent shall have or be deemed to have any fiduciary  relationship
with any Bank. Each Bank acknowledges that it has not relied, and will not rely,
on any of the  Banks  identified  as  "co-agent"  or as  Documentation  Agent in
deciding  to enter  into  this  Agreement  or in  taking  or not  taking  action
hereunder.  Without  limiting the generality of the foregoing,  it is understood
and agreed that the  Documentation  Agent is not  responsible  for the validity,
effectiveness,

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<PAGE>

enforceability or sufficiency of this Agreement or any other Credit Document.


SECTION VIII.  MISCELLANEOUS.

         8.01.  Notices.  Except as  otherwise  provided  herein,  all  notices,
requests,  demands,  consents,  instructions or other  communications to or upon
Borrower,  any Bank Party or any Agent under this  Agreement or the other Credit
Documents shall be in writing and faxed, mailed or delivered,  if to Borrower or
Administrative  Agent at its  respective  facsimile  number or address set forth
below, if to any Bank, at the address or facsimile number specified  beneath the
heading  "Address for Notices"  under the name of such Bank in Schedule I or, if
to Issuing  Bank,  at the address or  facsimile  number  indicated in the notice
given by Issuing Bank to the other  parties at the time any such Issuing Bank is
selected by Borrower and approved by  Administrative  Agent and the Co-Arrangers
(or to such other facsimile  number or address for any party as indicated in any
notice  given  by that  party  to the  other  parties).  All  such  notices  and
communications  shall be  effective  (a) when sent by  Federal  Express or other
overnight service of recognized  standing,  on the second Business Day following
the deposit with such service;  (b) when mailed, first class postage prepaid and
addressed as aforesaid  through the United States Postal Service,  upon receipt;
(c) when delivered by hand, upon delivery; and (d) when faxed, upon confirmation
of receipt; provided, however, that any notice delivered to Administrative Agent
or Issuing Bank under Section II shall not be effective  until  received by such
Person.

         Administrative
         Agent:                     Canadian Imperial Bank of Commerce
                                    425 Lexington Avenue
                                    New York, New York  10017
                                    Attn:  Ian Palmer
                                              Syndications
                                    Telephone:  (212) 856-3875
                                    Facsimile:  (212) 856-3763

         Borrower:                  Quantum Corporation
                                    500 McCarthy Boulevard
                                    Milpitas, CA 95035
                                    Attn: Ed McClammy,
                                             Vice President Finance & Treasurer
                                    Telephone:  (408) 894-5703
                                    Facsimile:  (408) 894-4562


Each  Notice of  Borrowing,  Notice of  Conversion,  Notice of  Interest  Period
Selection and LC Application shall be given by

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<PAGE>

Borrower  to  Administrative  Agent and,  in the case of an LC  Application,  to
Issuing  Bank, to the office of such Person  located at the address  referred to
above during such Person's normal business hours;  provided,  however,  that any
such  notice  received by any such Person  after 1:00 P.M. on any  Business  Day
shall be deemed  received by such Person on the next  Business  Day. In any case
where  this   Agreement   authorizes   notices,   requests,   demands  or  other
communications  by  Borrower  to any  Agent  or any  Bank  Party  to be  made by
telephone or  facsimile,  any Agent or any Bank Party may  conclusively  presume
that anyone purporting to be a person  designated in any incumbency  certificate
or other similar document received by such Agent or Bank Party is such a person.

         8.02.  Expenses.  Borrower shall pay within ten (10) days after demand,
whether  or not any  Revolving  Loan is made or any  Letter  of Credit is issued
hereunder,  (a) all  reasonable  fees and  expenses  payable  to third  parties,
including each Agent's out-of-pocket expenses and reasonable attorneys' fees and
expenses,  incurred by Agents in connection with the  preparation,  negotiation,
execution and delivery of, and the exercise of their duties  under,  the Summary
of Terms and Conditions  dated May 5, 1997 among  Borrower and the  Co-Arrangers
and the Agents' Fee Letters and their structuring of, due diligence  relating to
and syndication of the credit  facilities set forth in this  Agreement;  (b) all
(i) Attorney Costs and (ii) other  reasonable fees and expenses payable to third
parties  incurred by Agents in  connection  with the  preparation,  negotiation,
execution,  delivery  and  syndication  of this  Agreement  and the other Credit
Documents,  and  the  preparation,   negotiation,   execution  and  delivery  of
amendments  and waivers  hereunder and  thereunder;  (c) all Attorney  Costs and
other  reasonable fees and expenses  payable to third parties incurred by Agents
in connection  with the exercise of their rights or duties under this  Agreement
and the other Credit Documents;  and (d) all Attorney Costs and other reasonable
fees and  expenses  payable to third  parties  incurred by any Agent or any Bank
Party in the  enforcement or attempted  enforcement of any of the Obligations or
in preserving  any of Agents' or the Banks' rights and remedies  (including  all
such  fees  and  expenses   incurred  in   connection   with  any  "workout"  or
restructuring   affecting  the  Credit  Documents  or  the  Obligations  or  any
bankruptcy or similar proceeding involving Borrower or any of its Subsidiaries).
The  obligations of Borrower under this Paragraph 8.02 shall survive the payment
and performance of the Obligations and the termination of this Agreement.

         8.03. Indemnification. To the fullest extent permitted by law, Borrower
agrees to protect,  indemnify, defend and hold harmless Agents, the Bank Parties
and their Affiliates and their respective directors, officers, employees, agents
and advisors  ("Indemnitees") from and against any and all liabilities,  losses,
damages or expenses of any kind or nature and from any suits,

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<PAGE>

claims or demands (including in respect of or for reasonable attorney's fees and
other  expenses)  arising  on account  of or in  connection  with (a) any use by
Borrower of any proceeds of the Revolving Loans or any Letter of Credit, (b) any
violation or alleged  violation of any  Requirement of Law by Borrower or any of
its Affiliates,  (c) any Default or Event of Default,  (d) or any acquisition or
proposed acquisition by Borrower of the stock or assets (in whole or in part) of
any  other  Person  or (e)  the  execution,  delivery  and  performance  of this
Agreement  and the other  Credit  Documents  by any of the  Indemnitees  (unless
arising out of any  violation  by any of the Agents,  the Bank Parties or any of
their Affiliates of any applicable law governing its banking powers),  except to
the extent such liability arises from the willful misconduct or gross negligence
of such  Indemnitee.  Upon  receiving  knowledge  of any  suit,  claim or demand
asserted by a third  party that any Agent or any Bank Party  believes is covered
by this  indemnity,  such Agent or such Bank Party  shall give  Borrower  prompt
written notice of the matter (specifying with reasonable particularity the basis
therefor) and an  opportunity  (but not the  obligation)  to  participate in and
defend it, at Borrower's  sole cost and expense,  with legal counsel  reasonably
satisfactory  to such Agent or such Bank Party,  as the case may be. Any failure
or delay of any Agent or any Bank  Party to notify  Borrower  of any such  suit,
claim or  demand as  required  by this  Paragraph  8.03 or to  cooperate  in the
defense  thereof  shall not  relieve  Borrower  of its  obligations  under  this
Paragraph  8.03 but shall reduce such  obligations to the extent of any increase
in those  obligations  caused  solely  by any  such  failure  or delay  which is
unreasonable.  The  obligations  of  Borrower  under this  Paragraph  8.03 shall
survive the payment and  performance of the  Obligations  and the termination of
this Agreement.

         8.04. Waivers;  Amendments. Any term, covenant,  agreement or condition
of this Agreement or any other Credit  Document may be amended or waived if such
amendment  or waiver is in writing  and is signed by Borrower  and the  Majority
Banks; provided, however that:

                  (a) Any  amendment,  waiver or consent  which (i) amends  this
         Paragraph 8.04, or (ii) amends the definition of Majority Banks must be
         in writing and signed or approved in writing by all Banks;

                  (b) Any  amendment,  waiver or consent which (i) increases the
         Total  Commitment,  (ii) extends the Maturity  Date,  (iii) reduces the
         principal  of or interest on the  Revolving  Loans or any fees or other
         amounts payable for the account of the Banks hereunder,  (iv) increases
         the LC  Commitment,  or (v) postpones any date fixed for any payment of
         the  principal  of or  interest on the  Revolving  Loans or any fees or
         other amounts payable for the account of the

                                       83
<PAGE>

         Banks hereunder must be in writing and signed or approved in writing by
         all Banks;

                  (c) Any  amendment,  waiver  or  consent  which  increases  or
         decreases  the  Proportionate  Share of any Bank must be in writing and
         signed by such Bank;

                  (d) Any  amendment,  waiver or consent which  increases the LC
         Commitment or otherwise  affects the rights or  obligations  of Issuing
         Bank must be in writing and signed by Issuing Bank; and

                  (e) Any amendment,  waiver or consent which affects the rights
         or  obligations  of any Agent  must be in  writing  and  signed by such
         Agent.

No  failure  or delay by any  Agent or any Bank  Party in  exercising  any right
hereunder  shall operate as a waiver thereof or of any other right nor shall any
single or partial exercise of any such right preclude any other further exercise
thereof or of any other  right.  Unless  otherwise  specified  in such waiver or
consent,  a waiver or consent  given  hereunder  shall be effective  only in the
specific instance and for the specific purpose for which given.

         8.05.  Successors and Assigns.

                  (a)  Binding  Effect.  This  Agreement  and the  other  Credit
         Documents  shall be binding  upon and inure to the benefit of Borrower,
         the Bank  Parties,  Agents,  all future  holders of the Notes and their
         respective  successors and permitted assigns,  except that Borrower may
         not  assign or  transfer  any of its  rights or  obligations  under any
         Credit  Document  without the prior written  consent of Agents and each
         Bank. All references in this Agreement to any Person shall be deemed to
         include all successors and assigns of such Person.

                  (b)  Participations.  Any Bank may, in the ordinary  course of
         its commercial  banking business and in accordance with applicable law,
         at any time sell to one or more banks or other  financial  institutions
         ("Participants") participating interests in any Revolving Loan owing to
         such Bank,  any Note held by such Bank,  any Commitment of such Bank or
         any other  interest  of such Bank  under this  Agreement  and the other
         Credit  Documents.  In  the  event  of  any  such  sale  by a  Bank  of
         participating interests to a Participant, such Bank's obligations under
         this  Agreement  to the other  parties to this  Agreement  shall remain
         unchanged,   such  Bank  shall  remain  solely   responsible   for  the
         performance thereof, such Bank shall remain the holder of any such Note
         for all purposes under this Agreement, such Bank shall retain the right
         to approve amendments and waivers and other voting

                                       84
<PAGE>
         rights  hereunder and Agents and Borrower shall continue to deal solely
         and directly with such Bank in  connection  with such Bank's rights and
         obligations under this Agreement; provided, however, that any agreement
         pursuant  to  which  any  Bank  sells  a  participating  interest  to a
         Participant  may require the selling Bank to obtain the consent of such
         Participant in order for such Bank to agree in writing to any amendment
         of a  type  specified  in  clause  (i),  (ii),  (iii),  (iv)  or (v) of
         Subparagraph 8.04(b) or Subparagraph 8.04(c), as appropriate.  Borrower
         agrees that if amounts  outstanding  under this Agreement and the other
         Credit  Documents  are due and unpaid,  or shall have been  declared or
         shall have become due and payable  upon the  occurrence  of an Event of
         Default,  each  Participant  shall, to the fullest extent  permitted by
         law,  be  deemed  to  have  the  right  of  setoff  in  respect  of its
         participating  interest in amounts  owing under this  Agreement and any
         other  Credit  Documents  to the same  extent  as if the  amount of its
         participating  interest were owing  directly to it as a Bank under this
         Agreement or any other Credit Documents; provided, however, that (i) no
         Participant  shall exercise any rights under this sentence  without the
         consent of  Administrative  Agent,  (ii) no Participant  shall have any
         rights under this sentence  which are greater than those of the selling
         Bank and (iii) such rights of setoff shall be subject to the obligation
         of such  Participant  to share with the Banks,  and the Banks  agree to
         share with such  Participant,  as  provided  in  Subparagraph  2.09(b).
         Borrower also agrees that any Bank which has transferred all or part of
         its interests in the Commitments and the Revolving Loans to one or more
         Participants shall,  notwithstanding any such transfer,  be entitled to
         the full benefits  accorded such Bank under Paragraph  2.10,  Paragraph
         2.11, and Paragraph 2.12, as if such Bank had not made such transfer.

                  (c)  Assignments.  Any Bank may, in the ordinary course of its
         commercial  banking  business and in accordance with applicable law, at
         any time,  sell and assign to any Bank,  any affiliate of a Bank or any
         other bank or financial institution (individually,  an "Assignee Bank")
         all or a portion of its rights and obligations under this Agreement and
         the other Credit  Documents  (such a sale and assignment to be referred
         to herein as an  "Assignment")  pursuant to an assignment  agreement in
         the form of Exhibit G (an  "Assignment  Agreement"),  executed  by each
         Assignee Bank and such assignor Bank (an "Assignor Bank") and delivered
         to  Administrative  Agent  for  its  acceptance  and  recording  in the
         Register; provided, however, that:

                           (i) Without the  written  consent of Borrower  (which
                  written  consent of Borrower  shall not be required  after the
                  occurrence and during the

                                       85
<PAGE>

                  continuation of an Event of Default), Administrative Agent and
                  Issuing Bank (which consent of Borrower,  Administrative Agent
                  and Issuing Bank shall not be unreasonably  withheld), no Bank
                  may make any  Assignment  to any  Assignee  Bank which is not,
                  immediately  prior to such Assignment,  a Bank hereunder or an
                  affiliate which controls,  is controlled by or is under common
                  control with a Bank hereunder;

                           (ii) Without the written  consent of Borrower  (which
                  written  consent of Borrower  shall not be required  after the
                  occurrence and during the continuation of an Event of Default)
                  and  Administrative  Agent  (which  consent of Borrower may be
                  withheld in its sole and absolute discretion but which consent
                  of Administrative  Agent shall not be unreasonably  withheld),
                  no Bank may make any  Assignment to any Assignee Bank which is
                  not, immediately prior to such Assignment, a Bank hereunder or
                  an affiliate  which  controls,  is  controlled  by or is under
                  common  control  with a Bank  hereunder  if (A) the  principal
                  amount of such  Assignment  is less than the lesser of two and
                  one-half  percent (2.50%) of the Total  Commitment at the time
                  of such  Assignment  or all of the Assignor  Bank's  Revolving
                  Loans and Commitments hereunder or (B) if, after giving effect
                  to such Assignment,  the sum of the Assignor Bank's Commitment
                  would be  greater  than  zero but less  than two and  one-half
                  percent  (2.50%) of the Total  Commitment  at the time of such
                  Assignment;

                           (iii) Without the written  consent of Borrower (which
                  written  consent of Borrower  shall not be required  after the
                  occurrence and during the continuation of an Event of Default)
                  and  Administrative  Agent  (which  consent  of  Borrower  and
                  Administrative Agent shall not be unreasonably  withheld),  no
                  Bank may make any  Assignment  to any Assignee  Bank which is,
                  immediately  prior to such Assignment,  a Bank hereunder or an
                  affiliate which controls,  is controlled by or is under common
                  control with a Bank hereunder if the principal  amount of such
                  Assignment  is less than the  lesser of Five  Million  Dollars
                  ($5,000,000) or all of the Assignor Bank's Revolving Loans and
                  Commitments hereunder; and

                           (iv) No Bank may make any  Assignment  which does not
                  assign and delegate an equal pro rata  interest in such Bank's
                  Revolving Loans,  Commitments and all other rights, duties and
                  obligations  of such Bank under this  Agreement  and the other
                  Credit Documents.

                                       86
<PAGE>

         Upon  such  execution,  delivery,  acceptance  and  recording  of  each
         Assignment  Agreement,  from and after the  Assignment  Effective  Date
         determined  pursuant to such  Assignment  Agreement,  (A) each Assignee
         Bank thereunder shall be a Bank hereunder with a Proportionate Share as
         set forth on Attachment 1 to such  Assignment  Agreement and shall have
         the rights,  duties and obligations of such a Bank under this Agreement
         and the other Credit  Documents,  and (B) the Assignor Bank  thereunder
         shall be a Bank with a Proportionate Share as set forth on Attachment 1
         to such Assignment  Agreement,  or, if the  Proportionate  Share of the
         Assignor  Bank has been reduced to 0%, the Assignor Bank shall cease to
         be a Bank; provided,  however, that any such Assignor Bank which ceases
         to be a Bank shall  continue  to be  entitled  to the  benefits  of any
         provision of this Agreement which by its terms survives the termination
         of this Agreement.  Each Assignment  Agreement shall be deemed to amend
         Schedule I to the extent, and only to the extent,  necessary to reflect
         the addition of each Assignee  Bank, the deletion of each Assignor Bank
         which  reduces  its  Proportionate   Share  to  0%  and  the  resulting
         adjustment of  Proportionate  Shares  arising from the purchase by each
         Assignee Bank of all or a portion of the rights and  obligations  of an
         Assignor Bank under this Agreement and the other Credit  Documents.  On
         or prior to the Assignment  Effective Date determined  pursuant to each
         Assignment Agreement,  Borrower, at its own expense,  shall execute and
         deliver to  Administrative  Agent, in exchange for the surrendered Note
         of the  Assignor  Bank  thereunder,  a new  Note to the  order  of each
         Assignee Bank  thereunder in an amount equal to the Commitment  assumed
         by such Assignee Bank and, if the Assignor Bank is continuing as a Bank
         hereunder,  a new Note to the order of the  Assignor  Bank in an amount
         equal to the  Commitment  retained  by it.  Each such new Note shall be
         dated  the  Closing  Date  and  otherwise  be in the  form of the  Note
         replaced thereby  (provided that Borrower shall not be obligated to pay
         any  additional  interest  to  any  Assignee  Bank  in  respect  to any
         principal  payments made prior to the Assignment  Effective Date of the
         Assignment  to  such  Assignee  Bank).  The  Notes  surrendered  by the
         Assignor  Bank shall be  returned by  Administrative  Agent to Borrower
         marked  "replaced".  Each Assignee Bank which was not previously a Bank
         hereunder  and which is not  incorporated  under the laws of the United
         States of America or a state thereof  shall,  within three (3) Business
         Days of becoming a Bank, deliver to Borrower and  Administrative  Agent
         either two duly  completed  copies of United  States  Internal  Revenue
         Service Form 1001 or 4224 (or successor  applicable  form), as the case
         may be,  certifying  in each case that such Bank is entitled to receive
         payments under this Agreement  without  deduction or withholding of any
         United States federal income taxes.

                                       87
<PAGE>

                  (d)  Register.  Administrative  Agent  shall  maintain  at its
         address  referred  to in  Paragraph  8.01 a  copy  of  each  Assignment
         Agreement  delivered  to it and a  register  (the  "Register")  for the
         recordation   of  the  names  and   addresses  of  the  Banks  and  the
         Proportionate  Share of each Bank from time to time. The entries in the
         Register  shall be  conclusive  in the absence of manifest  error,  and
         Borrower,  Agents and the Bank Parties may treat each Person whose name
         is  recorded  in the  Register  as the  owner  of the  Revolving  Loans
         recorded therein for all purposes of this Agreement. The Register shall
         be  available  for  inspection  by  Borrower  or any Bank  Party at any
         reasonable time and from time to time upon reasonable prior notice.

                  (e) Registration.  Upon its receipt of an Assignment Agreement
         executed by an Assignor  Bank and an Assignee  Bank (and, to the extent
         required by Subparagraph 8.05(c), by Borrower, Administrative Agent and
         Issuing  Bank),  together  with  payment  to  Administrative  Agent  by
         Assignor  Bank  of  a  registration   and  processing  fee  of  $3,500,
         Administrative   Agent  shall  (i)  promptly   accept  such  Assignment
         Agreement and (ii) on the Assignment Effective Date determined pursuant
         thereto record the  information  contained  therein in the Register and
         give notice of such  acceptance and recordation to the Bank Parties and
         Borrower.  Administrative Agent may, from time to time at its election,
         prepare and deliver to the Bank Parties and Borrower a revised Schedule
         I reflecting the names,  addresses and respective  Proportionate Shares
         of all Banks then parties hereto.

         8.06.   Setoff; Security Interest.

                  (a) Setoff. In addition to any rights and remedies of the Bank
         Parties provided by law, each Bank Party shall have the right, with the
         prior consent of  Administrative  Agent, but without prior notice to or
         consent  from  Borrower,  any such  notice or consent  being  expressly
         waived by Borrower to the extent  permitted by applicable law, upon the
         occurrence  and  during  the  continuance  of an Event of  Default,  to
         set-off and apply,  or to  authorize or direct such Bank to set-off and
         apply,  against any  indebtedness,  whether  matured or  unmatured,  of
         Borrower to such Bank Party,  any amount  owing from such Bank Party to
         Borrower,  at or at any time after,  the  happening of any of the above
         mentioned  events,  and as  security  for such  indebtedness,  Borrower
         hereby grants to Administrative  Agent and each Bank Party a continuing
         security  interest  in any and all  deposits,  accounts  or  moneys  of
         Borrower then or thereafter maintained with such Bank Party, subject in
         each case to Subparagraph  2.09(b).  The aforesaid right of set-off may
         be exercised by any Bank Party against  Borrower or against any trustee
         in

                                       88
<PAGE>

         bankruptcy,   debtor  in  possession,   assignee  for  the  benefit  of
         creditors,  receiver or execution,  judgment or attachment  creditor of
         Borrower or against anyone else claiming through or against Borrower or
         such  trustee in  bankruptcy,  debtor in  possession,  assignee for the
         benefit of creditors,  receiver,  or execution,  judgment or attachment
         creditor, notwithstanding the fact that such right of set-off shall not
         have been  exercised by such Bank Party prior to the  occurrence  of an
         Event of Default.  Any Bank Party which  exercises  its right of setoff
         agrees   promptly  to  notify  Borrower  after  any  such  set-off  and
         application made by such Bank Party,  provided that the failure to give
         such  notice  shall  not  affect  the  validity  of  such  set-off  and
         application.

                  (b)  Security  Interest.  As  security  for  the  Obligations,
         Borrower  hereby  grants to each Bank  Party,  for the  benefit  of all
         Agents and Bank Parties, a continuing  security interest in any and all
         deposit accounts or moneys of Borrower now or hereafter maintained with
         such Bank  Party.  Each Bank  Party  shall  have all of the rights of a
         secured party with respect to such security interest.

         8.07. No Third Party Rights. Nothing expressed in or to be implied from
this  Agreement is intended to give, or shall be construed to give,  any Person,
other  than the  parties  hereto  and their  permitted  successors  and  assigns
hereunder,  any benefit or legal or equitable right, remedy or claim under or by
virtue of this Agreement or under or by virtue of any provision herein.

         8.08.  Partial  Invalidity.  If at  any  time  any  provision  of  this
Agreement is or becomes  illegal,  invalid or unenforceable in any respect under
the law or any jurisdiction, neither the legality, validity or enforceability of
the  remaining  provisions  of this  Agreement  nor the  legality,  validity  or
enforceability of such provision under the law of any other  jurisdiction  shall
in any way be affected or impaired thereby.

         8.09. Jury Trial. EACH OF BORROWER, THE BANK PARTIES AND AGENTS, TO THE
FULLEST EXTENT PERMITTED BY APPLICABLE LAW, HEREBY  IRREVOCABLY WAIVES ALL RIGHT
TO TRIAL BY JURY AS TO ANY ISSUE RELATING HERETO IN ANY ACTION,  PROCEEDING,  OR
COUNTERCLAIM ARISING OUT OF OR RELATING TO ANY CREDIT DOCUMENT.

         8.10.  Counterparts.  This  Agreement  may be executed in any number of
identical counterparts,  any set of which signed by all the parties hereto shall
be deemed to constitute a complete, executed original for all purposes.

         8.11.  Confidentiality.  None of the Banks and Agents shall disclose to
any Person any information  with respect to Borrower or any of its  Subsidiaries
which is furnished pursuant

                                       89
<PAGE>

to this  Agreement,  except  that  any  Bank or  Agent  may  disclose  any  such
information (a) to its own directors, officers, employees, auditors, counsel and
other professional  advisors and to its Affiliates if such Bank or Agent or such
Bank's  or such  Agent's  holding  or  parent  company  in its  sole  discretion
determines  that any such party should have access to such  information;  (b) to
another Bank or Agent; (c) if generally available to the public; (d) if required
or  appropriate  in  any  report,   statement  or  testimony  submitted  to  any
Governmental Authority having or claiming to have jurisdiction over such Bank or
Agent;  (e) if required or appropriate in response to any summons or subpoena or
in connection with any litigation,  to the extent  permitted or deemed advisable
by counsel; (f) to comply with any Requirement of Law applicable to such Bank or
Agent; (g) to any Participant or Assignee Bank or any prospective Participant or
Assignee  Bank,  provided  that such  Participant  or  Assignee  or  prospective
Participant  or Assignee  agrees in writing to be bound by this  Paragraph  8.11
prior to  disclosure;  or (h)  otherwise  with the prior  consent  of  Borrower;
provided, however, that any disclosure made in violation of this Agreement shall
not affect the obligations of Borrower under this Agreement and the other Credit
Documents.

                  [The next page is the first signature page.]



                                       90
<PAGE>

         IN WITNESS WHEREOF,  Borrower,  the Bank Parties and Agents have caused
this Agreement to be executed as of the day and year first above written.


BORROWER:                             QUANTUM CORPORATION


                                      By: /s/ G. Edward McClammy
                                         ---------------------------------------
                                          G. Edward McClammy
                                          Vice President Finance
                                          & Treasurer




CO-ARRANGERS:                         ABN AMRO BANK N.V., San Francisco
                                      International Branch,
                                      As a Co-Arranger


                                      By: /s/ Robin S. Yim
                                         ---------------------------------------
                                          Name:       Robin S. Yim
                                          Title:      Group Vice President


 
                                      By: /s/ Richard R. DaCosta
                                         ---------------------------------------
                                          Name:       Richard R. DaCosta
                                          Title:      Assistant Vice President



                                      CIBC INC.,
                                      As a Co-Arranger



                                      By: /s/ Cyd D. Petre
                                         ---------------------------------------
                                          Name:       Cyd D. Petre
                                          Title:      AUTHORIZED SIGNATORY


                                       91
<PAGE>


ADMINISTRATIVE AGENT:                 CANADIAN IMPERIAL BANK OF COMMERCE,
                                      As Administrative Agent



                                       By: /s/ Cyd D. Petre
                                         ---------------------------------------
                                          Name:       Cyd D. Petre
                                          Title:      Authorized Signatory




BANKS:                                ABN AMRO BANK N.V., San Francisco
                                      International Branch,
                                      As a Bank



                                      By: /s/ Robin S. Yim
                                         ---------------------------------------
                                          Name:       Robin S. Yim
                                          Title:      Group Vice President



                                      By: /s/ Richard R. DaCosta
                                         ---------------------------------------
                                          Name:       Richard R. DaCosta
                                          Title:      Assistant Vice President


                                      CIBC INC.,
                                      As a Bank



                                      By: /s/ Cyd D. Petre
                                         ---------------------------------------
                                          Name:       Cyd D. Petre
                                          Title:      AUTHORIZED SIGNATORY


                                      BANK OF AMERICA NATIONAL TRUST AND
                                      SAVINGS ASSOCIATION,
                                      As a Bank



                                      By: /s/ Kevin McMahon
                                         ---------------------------------------
                                          Name:       Kevin McMahon
                                          Title:      Managing Director


                                       92
<PAGE>

                                      BANKBOSTON, N.A.,
                                      As a Bank



                                      By: /s/ Lee A. Merkle
                                         ---------------------------------------
                                          Name:       Lee A. Merkle
                                          Title:      Vice President


                                      THE BANK OF NOVA SCOTIA,
                                      As a Bank



                                      By: /s/ Chris Johnson
                                         ---------------------------------------
                                          Name:       Chris Johnson
                                          Title:      Senior Relationship
                                                      Manager


                                      FLEET NATIONAL BANK,
                                      As a Bank



                                      By: /s/ Matthew Glauninger
                                         ---------------------------------------
                                          Name:       Matthew Glauninger
                                          Title:      Vice President


                                      THE INDUSTRIAL BANK OF JAPAN,
                                      LIMITED,
                                      As a Bank



                                      By: /s/ Haruhiko Masuda
                                         ---------------------------------------
                                          Name:       Haruhiko Masuda
                                          Title:      Deputy General Manager


<TABLE>
                                      BANQUE NATIONALE DE PARIS,
                                      As a Bank
<CAPTION>

<S>                                   <C>
                                      By:                             /s/  William J. La Herran
                                         ------------------------------------------------------
                                          Name:   Rafael C. Lumanlan    William J. La Herran
                                          Title:  Vice President        Assistant Vice President
</TABLE>


                                       93
<PAGE>

                                      THE MITSUBISHI TRUST AND BANKING
                                      CORPORATION, LOS ANGELES AGENCY
                                      As a Bank



                                      By: /s/ Yasushi Satomi
                                         ---------------------------------------
                                          Name:       Yasushi Satomi
                                          Title:      Senior Vice President


                                      UNION BANK OF CALIFORNIA, N.A.,
                                      As a Bank



                                      By: /s/ Patrick Clemens
                                         ---------------------------------------
                                          Name:       Patrick Clemens
                                          Title:      Assistant Vice President


                                      THE FUJI BANK, LIMITED,
                                      As a Bank



                                      By: /s/ Kazuo Kamio
                                         ---------------------------------------
                                          Name:       Kazuo Kamio
                                          Title:      General Manager


                                      ROYAL BANK OF CANADA,
                                      As a Bank



                                      By: /s/ Stephen S. Hughes
                                         ---------------------------------------
                                          Name:       Stephen S. Hughes
                                          Title:      Senior Manager


                                      DEUTSCHE BANK AG NEW YORK AND/OR
                                      CAYMAN ISLAND BRANCHES,
                                      As a Bank



                                      By: /s/ Ralf Hoffman
                                         ---------------------------------------
                                          Name:       Ralf Hoffman
                                          Title:      Vice President


 
                                      By: /s/ Belinda J. Wheeler
                                         ---------------------------------------
                                          Name:       Belinda J. Wheeler
                                          Title:      Vice President

                                       94
<PAGE>

                                      KEYBANK NATIONAL ASSOCIATION
                                      As a Bank



                                      By: /s/ Kevin P. McBride
                                         ---------------------------------------
                                          Name:       Kevin P. McBride
                                          Title:      Vice President


                                      THE LONG-TERM CREDIT BANK OF JAPAN,
                                      LTD.,
                                      As a Bank



                                       By: /s/ Motokazu Uematsu
                                         ---------------------------------------
                                          Name:       Motokazu Uematsu
                                          Title:      Deputy General Manager


                                      MELLON BANK,
                                      As a Bank



                                      By: /s/ Edwin H. Wiest
                                         ---------------------------------------
                                          Name:       Edwin H. Wiest
                                          Title:      First Vice President


                                      SANWA BANK CALIFORNIA,
                                      As a Bank



                                      By: /s/ Robert R. Shutt
                                         ---------------------------------------
                                          Name:       Robert R. Shutt
                                          Title:      Vice President


                                      THE SUMITOMO TRUST AND BANKING CO.,
                                      LTD., LOS ANGELES AGENCY
                                      As a Bank



                                      By: /s/ Ninoos Y. Benjamin
                                         ---------------------------------------
                                          Name:       Ninoos Y. Benjamin
                                          Title:      Vice President & Manager

                                       95
<PAGE>

                                      BANQUE PARIBAS,
                                      As a Bank



                                      By: /s/ Nanci Meyer
                                         ---------------------------------------
                                          Name:       Nanci Meyer
                                          Title:      Assistant Vice President



                                      By: /s/ Lee S. Buckner
                                         ---------------------------------------
                                          Name:       Lee S. Buckner
                                          Title:      Group Vice President

                                      THE SUMITOMO BANK, LIMITED,
                                      As a Bank



                                      By: /s/ Kozo Masaki
                                         ---------------------------------------
                                          Name:       Kozo Masaki
                                          Title:      General Manager

                                       96
<PAGE>


                                   SCHEDULE I

                                      BANKS




                                                PROPORTIONATE
BANK                                               SHARE*
- ----                                               ------


ABN AMRO BANK N.V.                                8.00000000%

Applicable Lending Office:

ABN AMRO Bank N.V.
San Francisco International
  Branch
101 California Street
Suite 4550
San Francisco, CA  94111-5812


Address for Notices:

ABN AMRO Bank N.V.
San Francisco International Branch
101 California Street, Suite 4550
San Francisco, CA  94111-5812
Attn:    Robert N. Hartinger
         Robin S. Yim

Telephone:  (415) 984-3710
Fax:        (415) 362-3524


ABN AMRO Bank, N.V.
1235 Avenue of the Americas, 9th Floor
New York, NY  10019
Attn:  Drew Helene
       Vice President, Syndications

Telephone:  (212) 370-8505
Fax:  (212) 503-2689 or 682-0364



Wiring Instructions:

ABN AMRO Bank N.V.
ABA No.:  026-009-580
Account No.:  651001054541
Account Name:  ABN AMRO San
  Francisco International Branch
Reference:  Quantum Corp.




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-1
<PAGE>

                                                PROPORTIONATE
BANK                                               SHARE*
- ----                                               ------


CIBC INC.                                         8.00000000%

Applicable Lending Office:

CIBC Inc.
Two Paces West
2727 Paces Ferry Road, Suite 1200
Atlanta, GA 30339


Address for Notices:

CIBC Inc.
425 Lexington Avenue
New York, NY 10017
Attention:  Jan Palmer

Telephone:        (212) 856-3695
Fax:              (212) 856-3763 or 3799


Wiring Instructions:

Morgan Guaranty Trust Company of
  New York
New York, NY 10260
ABA No.:  021-000-238
Account No.:  630-00-480
Account Name:  CIBC, New York Agency

For further credit to: Agented Loans
Account No. 07-09611
Attention:  Syndications
Reference:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-2
<PAGE>

                                                   PROPORTIONATE
BANK                                                  SHARE*
- ----                                                  ------


BANK OF AMERICA NATIONAL TRUST
AND SAVINGS ASSOCIATION                             8.00000000%

Applicable Lending Office:

Bank of America National Trust
  and Savings Association
1850 Gateway Boulevard, 3rd Floor
Concord, CA  94520
Attention:  Julia Young
            GPO Account Admin: #5693

Telephone:        (510) 675-7328
Fax:              (510) 675-7531


Address for Notices:

Bank of America National Trust
  and Savings Association
Credit Products-High Technology-SF #3697
555 California Street, 41st Floor
San Francisco, CA  94104
Attention:  Kevin McMahon
            Managing Director

Telephone:        (415) 622-8088
Fax:              (415) 622-2514


Wiring Instructions:

Bank of America National Trust
  and Savings Association
San Francisco, California
ABA No.:  121000358
Account No.:  1233183980
Reference:  Quantum Corp.
Attention:  Julia Young



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                       I-3
<PAGE>

                                                  PROPORTIONATE
BANK                                                 SHARE*
- ----                                                 ------


BANKBOSTON, N.A.                                   6.00000000%

Applicable Lending Office:
BankBoston, N.A.
435 Tasso Street, Suite 250
Palo Alto, CA  94301


Address for Notices:

BankBoston, N.A.
435 Tasso Street, Suite 250
Palo Alto, CA  94301
Attn:  Lee A. Merkle, Vice President

Telephone:        (415) 853-0404
Fax:              (415) 853-1425

Wiring Instructions:

BankBoston, N.A.
100 Federal Street
Boston, MA 02110
ABA No.:  011-000-390
Account No.:  540-99647
Attn:  Comm Loan Svc, Adm 50 High Tech
Ref:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-4
<PAGE>

                                                  PROPORTIONATE
BANK                                                 SHARE*
- ----                                                 ------


THE BANK OF NOVA SCOTIA                             6.00000000%

Applicable Lending Office:

The Bank of Nova Scotia
580 California Street, Suite 2100
San Francisco, CA 94104
Attention:  Mr. Chris Johnson

Telephone:        (415) 986-1100
Fax:              (415) 397-0791


Address for Notices:

The Bank of Nova Scotia
600 Peachtree Street, N.E.
Atlanta, GA 30308
Attention:  Norman O. Campbell

Telephone:        (404) 877-1500
Fax:              (404) 888-8998


Wiring Instructions:

The Bank of Nova Scotia
One Liberty Plaza
New York, NY
ABA No.:  026002532
Account No.:  60023-7
For Credit to:  The Bank of Nova Scotia
                San Francisco Agency
Reference:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-5
<PAGE>

                                              PROPORTIONATE
BANK                                             SHARE*
- ----                                             ------


FLEET NATIONAL BANK                             6.00000000%

Applicable Lending Office:

Fleet National Bank
75 State Street
Boston, MA  02109


Address for Notices:

Fleet National Bank
75 State Street
Boston, MA  02109
Attention:        Matthew Glauninger
                  Vice President

Telephone:        (617) 346-1645
Fax:              (617) 346-1633


Wiring Instructions:

Fleet National Bank
75 State Street
Boston, MA  02109
ABA:  011-000-138
Account Name:  Incoming Loan in Process Wire Account
A/C No.:  120986-03156
Reference:  Quantum Corp.
Attention:  Commercial Loan Operations/Agent Bank




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                       I-6
<PAGE>

                                                   PROPORTIONATE
BANK                                                  SHARE*
- ----                                                  ------


THE INDUSTRIAL BANK OF
JAPAN, LIMITED                                       6.00000000%

Applicable Lending Office:

The Industrial Bank of Japan, Limited
San Francisco Agency
555 California Street, Suite 3110
San Francisco, CA  94104


Address for Notices:

The Industrial Bank of Japan, Limited
San Francisco Agency
555 California Street, Suite 3110
San Francisco, CA  94104
Attention:  Jeanette O'Donnell

Telephone:        (415) 693-1831
Fax:              (415) 982-1917
Telex:            49608738
Answerback:       IBJ SFO


Wiring Instructions:

Bank of American NT & SA
International Deposit Services 6561
1850 Gateway Boulevard
Concord, CA  94520
ABA No.:          121-000-358
Account:          The Industrial Bank of Japan, Limited
                  Los Angeles Agency
Account No.:  62906-14014
                  "For Credit to IBJ SFA, A/C 2601-22011"




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-7
<PAGE>

                                                   PROPORTIONATE
BANK                                                  SHARE*
- ----                                                  ------


BANQUE NATIONALE DE PARIS                            5.00000000%

Applicable Lending Office:

Banque Nationale de Paris
180 Montgomery Street, 3rd Floor
San Francisco, CA 94104
Attention:        Rafael Lumanlan

Telephone:        (415) 956-0707
Fax:              (415) 296-8954
Telex:            RCA 278900
Answerback:       BNPS UR


Address for Notices:

Banque Nationale de Paris
180 Montgomery Street, 3rd Floor
San Francisco, CA  94104

Credit:

Rafael Lumanlan
Vice President
Telephone:  (415) 956-0707
Fax:        (415) 296-8954

Operations:

Donald A. Hart
Treasurer
Telephone:  (415) 956-2511
Fax:        (415) 989-9041


Wiring Instructions:

Federal Reserve Bank of San Francisco
For the Account of:  Banque Nationale de Paris
                     San Francisco Branch
ABA #:  121027234
Ref:    QUANTUM REVOLVER



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-8
<PAGE>

                                                     PROPORTIONATE
BANK                                                    SHARE*
- ----                                                    ------


THE MITSUBISHI TRUST AND
BANKING CORPORATION, LOS ANGELES AGENCY                5.00000000%

Applicable Lending Office:

The Mitsubishi Trust and Banking Corporation, Los Angeles Agency
801 South Figueroa Street, Suite 500
Los Angeles, CA  90017
Attention:        Michael Lundgren
                  Assistant Vice President

Telephone:        (213) 896-4732
Fax:              (213) 629-2571/ (213) 687-4631
Telex:  49657290
Answerback:  MTB B LSA

Alternative Contact:                Pam Khamvongsa
                                    Loan Assistant

Telephone:        (213) 896-4735
Fax:              (213) 687-8325



Address for Notices:

The Mitsubishi Trust and Banking Corporation, Los Angeles Agency
801 South Figueroa Street, Suite 500
Los Angeles, CA  90017
Attention:  Jill Kato
                  Vice President

Telephone:  (213) 896-4655
Fax:  (213) 687-4631

Alternative Contact:                F. Frank Herrera
                                    First Vice President

Telephone:        (213) 896-4652


Wiring Instructions:

Bank of America, San Francisco, California
ABA #:  121 000 358
Account #:  62908-04915
Ref:  Quantum Corporation
Attention:  Loan Administration Department


* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                       I-9
<PAGE>

                                                 PROPORTIONATE
BANK                                                SHARE*
- ----                                                ------


UNION BANK OF CALIFORNIA, N.A.                     5.00000000%

Applicable Lending Office:

Union Bank of California, N.A.
400 California Street, 16th Floor
San Francisco, CA  94104
Attention:        Norma Sarto

Telephone:        (415) 765-2722
Fax:              (415) 765-2920
Telex:            188316 UNION SFO UT
Answerback:       UNION SFO UT


Address for Notices:

Union Bank of California, N.A.
350 California Street, 6th Floor
San Francisco, CA  94104
Attention:        Glenn Leyrer

Telephone:        (415) 705-7578
Fax:              (415) 705-5093


Wiring Instructions:

Union Bank of California, 1980 Saturn Street, Monterey, CA 91755
Los Angeles, CA
Fed ABA No.:  122-000-496
Account No.:  070196431
Reference:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                      I-10
<PAGE>

                                                PROPORTIONATE
BANK                                               SHARE*
- ----                                               ------


THE FUJI BANK, LIMITED                            4.00000000%

Applicable Lending Office:

The Fuji Bank, Ltd.
601 California Street
San Francisco, CA  94108
Attention:  Mike Rogers

Telephone:  (415) 296-5440
Fax:        (415) 362-4613
Telex:            176087
Answerback:       FUJIBK SFO


Address for Notices:

The Fuji Bank, Ltd.
601 California Street
San Francisco, CA  94108

         Credit:
         Attention:  Mami Yamajo, Vice President
         Telephone:        (415) 296-5433
         Fax:              (415) 362-4613

         Operations:
         Attention:  Candi Eng
         Telephone:        (415) 296-5444
         Fax:              (415) 362-4613




Wiring Instructions:

Bank of America, NT&SA
San Francisco, CA
ABA #: 1210-0035-8
Account Name: The Fuji Bank, Limited, San Francisco
Account #:  62 901-08242
Ref:  Quantum R/C



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-11
<PAGE>
                                                    PROPORTIONATE
BANK                                                   SHARE*
- ----                                                   ------


ROYAL BANK OF CANADA                                  4.00000000%

Applicable Lending Office:

Royal Bank of Canada
600 Wilshire Blvd., Suite 800
Los Angeles, CA  90017
Attention:  Stephen Hughes

Telephone:        (213) 955-5320
Fax:              (213) 955-5350


Address for Notices:

Credit:

Royal Bank of Canada
600 Wilshire Blvd., Suite 800
Los Angeles, CA  90017
Attention:  Stephen Hughes

Telephone:        (213) 955-5320
Fax:              (213) 955-5350

Operations:

Royal Bank of Canada
1 Financial Square, 23rd Floor
New York, NY  10005-3531
Attention:  Linda Smith
Telephone:        (212) 428-6323
Fax:              (212) 428-2372
Telex:            ROYBAN 65219


Wiring Instructions:

Chase Manhattan Bank, New York
New York, NY
ABA #:  021000021
Account #:  920-1-033363
Attention:  Linda Smith




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-12
<PAGE>

                                                  PROPORTIONATE
BANK                                                 SHARE*
- ----                                                 ------


DEUTSCHE BANK AG NEW YORK AND/OR                    4.00000000%
CAYMAN ISLANDS BRANCHES

Applicable Lending Office:

Deutsche Bank AG
31 West 52nd Street
New York, NY 10019
Attention:  Nancy Zorn

Telephone:  (212) 469-4112
Fax:        (212) 469-4139

Backup Operations:  Lynn Sweeney
Telephone:        (212) 469-4098
Fax:              (212) 469-4139

Address for Notices:
50 California Street, Suite 1500
San Francisco, CA 94111
Attention: Olaf Janke

Telephone:  (415) 439-5225
Fax:        (415) 439-5215


Wiring Instructions:

Deutsche Bank AG New York Branch
ABA #:  026003780
Ref:  Quantum Corporation
Attention:  Nancy Zorn


* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-13
<PAGE>

                                                   PROPORTIONATE
BANK                                                  SHARE*
- ----                                                  ------


KEYBANK NATIONAL ASSOCIATION                         4.00000000%

Applicable Lending Office:

KeyBank National Association
P.O. Box 1594
Tacoma, WA 98401
Attention:  Vicky Heineck/Mary Pease

Telephone:  (800) 297-5818
Fax:  (800) 297-5495


Address for Notices:

700 Fifth Avenue, 48th Floor
Seattle, WA 98104
Attention:  Kevin McBride/Mary Young

Telephone:  (206) 684-6039
Fax:  (206) 684-6035


Wiring Instructions:

KeyBank National Association

ABA #:  125000574
Account Name: NW Region Specialty Services
Account #:  01500163
Ref:  Quantum



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                      I-14
<PAGE>

                                                     PROPORTIONATE
BANK                                                    SHARE*
- ----                                                    ------


THE LONG-TERM CREDIT BANK
OF JAPAN, LTD.                                         4.00000000%

Applicable Lending Office:

The Long-Term Credit Bank of Japan, Ltd.
350 South Grand Avenue, Suite 3000
Los Angeles, CA  90071
Attention:  Tamotsu Ukai

Telephone:        (213) 689-6345
Fax:              (213) 626-1067


Address for Notices:

The Long-Term Credit Bank of Japan, Ltd.
350 South Grand Avenue, Suite 3000
Los Angeles, CA  90071
Attention:  Lisa Truong/Claude Graham

Telephone:        (213) 689-6244/(213) 689-6235
Fax:              (213) 626-1067
Telex:            673-3533
Answerback:       LTCB LSA


Wiring Instructions:

First Interstate Bank of California
Los Angeles, CA
Fed ABA#:  122000358
For Credit to:             Long-Term Credit Bank of Japan
                           Los Angeles Agency
Account No.:  6290131191
Attention:  LA7
Reference:        Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-15
<PAGE>

                                                   PROPORTIONATE
BANK                                                  SHARE*
- ----                                                  ------


MELLON BANK                                          4.00000000%

Applicable Lending Office:

Mellon Bank
435 Tasso Street, Suite 100
Palo Alto, CA 94301
Attention:  Sean C. Gannon

Telephone:  (415) 326-3005 ext. 224
Fax:        (415) 326-2382


Address for Notices:

Mellon Bank
Three Mellon Bank Center, 153-2304
Pittsburgh, PA  15259
Attention:  Damon Carr

Telephone:  (412) 234-1872
Fax:        (412) 236-2027


Wiring Instructions:

Mellon Bank
Attention:  Loan Administration
ABA #:  043000261
Account #:  990-873-800
Ref:  Quantum Corporation
Attention:  Loan Administration



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-16
<PAGE>

                                                     PROPORTIONATE
BANK                                                    SHARE*
- ----                                                    ------


SANWA BANK CALIFORNIA                                  4.00000000%

Applicable Lending Office:

Sanwa Bank California
San Jose Commercial Banking Center
220 Almaden Boulevard
San Jose, CA  95113


Address for Notices:

Sanwa Bank California
San Jose Commercial Banking Center
220 Almaden Boulevard
San Jose, CA  95113
Attention:        Robert R. Schutt
                  James E. Rosewater

Telephone:        (408) 297-6500
Fax:              (408) 292-4092


Wiring Instructions:

Sanwa Bank California
ABA No.:  122003516
Account Name:  San Jose CBC
Account No.:  1128-19005
Reference:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-17
<PAGE>

                                                      PROPORTIONATE
BANK                                                     SHARE*
- ----                                                     ------


THE SUMITOMO TRUST AND
BANKING CO., LTD. LOS ANGELES AGENCY                    4.00000000%

Applicable Lending Office:

The Sumitomo Trust and Banking Co., Ltd., Los Angeles Agency
333 South Grand Avenue, Suite 5300
Los Angeles, CA  90071
Attention:  Dan McGregor

Telephone:        (213) 229-2197
Fax:              (213) 613-1083


Address for Notices:

The Sumitomo Trust and Banking Co., Ltd.. Los Angeles Agency
333 South Grand Avenue, Suite 5300
Los Angeles, CA  90071
Attention:  Manager, Credit Administration Department

Telephone:        (213) 629-3191
Fax:              (213) 628-2719


Wiring Instructions:

Bank of America NT & SA, San Francisco, California
ABA #:  121000358
Account Name:  The Sumitomo Trust & Banking Co., Ltd., Los Angeles Agency
Account #:  62907-31117
Ref:  Quantum Corporation



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                      I-18
<PAGE>

                                                     PROPORTIONATE
BANK                                                    SHARE*
- ----                                                    ------


BANQUE PARIBAS                                         3.00000000%

Applicable Lending Office:

Banque Paribas
101 California Street, Suite 3150
San Francisco, CA  94111
Attention:  Nanci Meyer

Telephone:  (415) 398-6811
Fax:        (415) 398-4240


Address for Notices:

Banque Paribas
2029 Century Park East, Suite 3900
Los Angeles, CA  90067

         Letters of Credit:

         Attention:        Tessie Xander
         Telephone:        (310) 551-7385
         Fax:              (310) 553-1504

         Revolver:

         Attention:        Shirley Williams
         Telephone:        (310) 551-7360
         Fax:              (310) 553-1504


Wiring Instructions:

Bank of America, San Francisco CA
ABA #:  1210-0035-8
For credit to Banque Paribas, Los Angeles Agency
Account #:  62902-10150
Ref:  Quantum Corporation



* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.

                                      I-19
<PAGE>

                                                  PROPORTIONATE
BANK                                                 SHARE*
- ----                                                 ------


THE SUMITOMO BANK, LIMITED                          2.00000000%

Applicable Lending Office:

The Sumitomo Bank, Limited
San Francisco Agency
555 California Street, Suite 3350
San Francisco, CA  94104
Attention:        Gavin Hollis

Telephone:        (415) 616-3003
Fax:              (415) 397-1475

Address for Notices:

The Sumitomo Bank, Limited
San Francisco Agency
555 California Street, Suite 3350
San Francisco, CA  94104
Attention:        Matt Kather

Telephone:        (415) 616-3025
Fax:              (415) 378-3580


Wiring Instructions:

The Sumitomo Bank of California
ABA No.:  121 002 042
Account Name:  The Sumitomo Bank, Ltd., San Francisco Branch
Reference:  Quantum Corporation




* To be expressed  as a  percentage  rounded to the eighth digit to the right of
the decimal point.


                                      I-20
<PAGE>

                                   SCHEDULE II

                                  PRICING GRID

                         LEVEL 1     LEVEL 2   LEVEL 3    LEVEL 4    LEVEL 5
                         PERIOD      PERIOD    PERIOD     PERIOD     PERIOD
                         -------     -------   -------    -------    -------

APPLICABLE MARGINS
AND LC USAGE
FEE RATES:                0.40%       0.55%     0.70%      0.90%      1.10%


COMMITMENT FEE
PERCENTAGES:              .150%       .200%     .250%      .300%      .375%




                                   EXPLANATION

1.       The  Applicable  Margin for each LIBOR  Loan,  the LC Usage Fee Rate on
         each Letter of Credit and the Commitment Fee Percentage will be set for
         each Pricing Period and will vary depending upon whether such period is
         a Level 1 Period,  a Level 2 Period, a Level 3 Period, a Level 4 Period
         or a Level 5 Period.

2.       The first Pricing Period, which commences on the date of this Agreement
         and ends on September 30, 1997, will be a Level 3 Period.

3.       The second Pricing Period,  which commences on October 1, 1997 and ends
         on November 30,  1997,  will be a Level 1 Period,  a Level 2 Period,  a
         Level 3  Period,  a Level 4 Period or a Level 5 Period  depending  upon
         Borrower's  Total Funded Debt Ratio (and,  with respect to  determining
         pricing  at  Level  1  Pricing  only,   EBITDA)  for  the   consecutive
         four-fiscal quarter period ending on June 30, 1997.

4.       Each  Pricing  Period  thereafter  will be a Level 1 Period,  a Level 2
         Period,  a  Level  3  Period,  a Level  4  Period  or a Level 5  Period
         depending upon Borrower's Total Funded Debt Ratio (and, with respect to
         determining  pricing  at Level 1  Pricing  only,  EBITDA)  for the most
         recent consecutive four-fiscal quarter period ending prior to the first
         day of such Pricing Period as follows:

         (a)      If, during any Pricing Period (i) Borrower's Total Funded Debt
                  Ratio  is 1.00 or less  and  (ii)  Borrower's  EBITDA  for the
                  previous four  quarters is  $400,000,000  or more,  Borrower's
                  pricing will be a Level 1 Period.

         (b)      If, during any Pricing  Period,  (i)  Borrower's  Total Funded
                  Debt  Ratio is more  than 1.00 but less than or equal to

                                      II-1
<PAGE>


                  1.50, or (ii) Borrower's  Total Funded Debt Ratio is less than
                  or equal to 1.00 but  Borrower's  EBITDA for the previous four
                  quarters is less than $400,000,000, Borrower's pricing will be
                  a Level 2 Period.

         (c)      If, during any Pricing  Period,  Borrower's  Total Funded Debt
                  Ratio  is more  than  1.50  but  less  than or  equal to 2.00,
                  Borrower's pricing will be a Level 3 Period.

         (d)      If, during any Pricing  Period,  Borrower's  Total Funded Debt
                  Ratio  is more  than  2.00  but  less  than or  equal to 2.50,
                  Borrower's pricing will be a Level 4 Period.

         (e)      If, during any Pricing  Period,  Borrower's  Total Funded Debt
                  Ratio is more than 2.50,  Borrower's pricing will be a Level 5
                  Period.

5.       Level 1 Period will also apply  during any Pricing  Period  (other than
         the first  Pricing  Period) in which  Borrower's  senior long term debt
         rating  from S&P or Moody's is equal to or better  than  either BBB- or
         Baa3 or  Borrower's  subordinated  debt  rating  from S&P or Moody's is
         equal to or better than BB+ or Ba1.

                                      II-2
<PAGE>

                                  SCHEDULE 3.01

                          INITIAL CONDITIONS PRECEDENT


A.       Principal Credit Documents.

                  (1) The Credit Agreement, duly executed by Borrower, each Bank
         and each Agent; and

                  (2) A Note  payable  to  each  Bank,  each  duly  executed  by
         Borrower.


B.       Borrower Corporate Documents.

                  (1) The Certificate of Incorporation of Borrower, certified as
         of a recent date prior to the Closing Date by the Secretary of State of
         Delaware;

                  (2) A Certificate of Good Standing for Borrower (or comparable
         certificate),  certified  as of a recent date prior to the Closing Date
         by the Secretary of State of Delaware;

                  (3) A certificate  of the Secretary or an Assistant  Secretary
         of  Borrower,  dated the Closing  Date,  certifying  (a) that  attached
         thereto  is a true and  correct  copy of the Bylaws of  Borrower  as in
         effect on the  Closing  Date;  (b) that  attached  thereto are true and
         correct copies of resolutions duly adopted by the Board of Directors of
         Borrower and  continuing  in effect,  which  authorize  the  execution,
         delivery and  performance  by Borrower of this  Agreement and the other
         Credit  Documents  executed  or to be  executed  by  Borrower  and  the
         consummation of the transactions  contemplated hereby and thereby;  (c)
         that there are no  proceedings  for the  dissolution  or liquidation of
         Borrower;  and (d) the  incumbency,  signatures  and  authority  of the
         officers of Borrower  authorized  to execute,  deliver and perform this
         Agreement,   the  other  Credit  Documents  and  all  other  documents,
         instruments or agreements related thereto executed or to be executed by
         Borrower and indicating each such officer which is an Executive Officer
         or Authorized Financial Officer; and

                  (4) Certificates of Good Standing (or comparable  certificate)
         for  Borrower,  certified as of a recent date prior to the Closing Date
         by the  Secretaries  of State (or comparable  public  official) of each
         state in which Borrower is qualified to do business.

C.       Financial Statements, Financial Condition, Etc.

                                     3.01-1
<PAGE>

                  (1) A copy  of the  unaudited  balance  sheet,  statements  of
         income and cash flows of Borrower and its  Subsidiaries  for the fiscal
         quarter  ended  March  31,  1997 and for the  fiscal  year to such date
         (prepared on a consolidated basis);

                  (2) A copy of the audited consolidated Financial Statements of
         Borrower for the fiscal year ended March 31, 1996,  prepared by Ernst &
         Young  and  a  copy  of  the  unqualified  opinion  delivered  by  such
         accountants in connection with such Financial Statements;

                  (3) A copy of the  10-Q  report  filed  by  Borrower  with the
         Securities  and Exchange  Commission for the quarter ended December 29,
         1996;

                  (4) A copy of the  10-K  report  filed  by  Borrower  with the
         Securities and Exchange  Commission for the fiscal year ended March 31,
         1996; and

                  (5) Such  other  financial,  business  and  other  information
         regarding  Borrower,  or any of its Subsidiaries as any Co-Arranger may
         reasonably  request,  including  information as to possible  contingent
         liabilities,  tax matters,  environmental  matters and  obligations for
         employee benefits and compensation.


D. Opinions.  A favorable written opinion from Wilson Sonsini Goodrich & Rosati,
counsel for Borrower,  dated the Closing Date,  addressed to the  Administrative
Agent for the benefit of the Agents and the Banks,  covering  such legal matters
as  Agents  may   reasonably   request  and  otherwise  in  form  and  substance
satisfactory to the Co-Arrangers.


E. Other Items.

                  (1) A duly completed and timely delivered Notice of Borrowing;

                  (2) The Disclosure Letter, duly executed by Borrower;

                  (3) A copy of the indenture  (including,  as  applicable,  the
         form of  debenture  and the  form of the  note)  and  other  documents,
         agreements and  instruments,  related to the  Convertible  Subordinated
         Debentures,  together with all amendments  and indentures  supplemental
         thereto through the Closing Date,  certified by an Executive Officer of
         Borrower;

                  (4) An organization  chart for Borrower and its  Subsidiaries,
         setting  forth the  relationship  among such  Persons,  certified by an
         Executive Officer of Borrower;

                                     3.01-2
<PAGE>

                  (5)  A  certificate  of  an  Executive  Officer  of  Borrower,
         addressed  to   Administrative   Agent  and  dated  the  Closing  Date,
         certifying that:

                           (a) The  representations  and warranties set forth in
                  Paragraph  4.01 are true and correct in all material  respects
                  as  of  such  date  (except  for  such   representations   and
                  warranties made as of a specified date, which shall be true as
                  of such date); and

                           (b) No Event of Default or Default has  occurred  and
                  is continuing as of such date;

                  (6) Evidence  satisfactory  to  Administrative  Agent that the
         proceeds  of the initial  Loans to be made on the Closing  Date will be
         used to satisfy all  outstanding  indebtedness  of  Borrower  under the
         Prior Credit  Agreement,  that the  obligations  of Borrower  under the
         Prior Credit Agreement (other than inchoate indemnity obligations) have
         been satisfied and that the Prior Credit Agreement is terminated;

                  (7) All fees and expenses  payable to the Agents and the Banks
         on or prior to the Closing Date (including all Origination Fees and all
         fees payable to the Agents pursuant to the Agents' Fee Letters);

                  (8) All fees and  expenses  of Agents'  counsels  through  the
         Closing Date; and

                  (9)  Such  other  evidence  as any  Agent  or Bank  Party  may
         reasonably  request to establish the accuracy and  completeness  of the
         representations  and warranties  and the compliance  with the terms and
         conditions contained in this Agreement and the other Credit Documents.

                                     3.01-3
<PAGE>

                                SCHEDULE 4.01(p)


                              See Disclosure Letter




                                    4.01(p)-1

<PAGE>



                                SCHEDULE 5.02(a)


                              See Disclosure Letter




                                    5.02(a)-1

<PAGE>
                                    EXHIBIT A

                               NOTICE OF BORROWING

                                     [Date]


Canadian Imperial Bank of Commerce,
         as Administrative Agent
425 Lexington Avenue
New York, New York  10017
Attn:  Ian Palmer
       Syndications


         1. Reference is made to that certain Credit Agreement, dated as of June
6, 1997 (as amended from time to time,  the "Credit  Agreement"),  among Quantum
Corporation ("Borrower"), the financial institutions listed in Schedule I to the
Credit Agreement (the "Banks"), ABN AMRO Bank N.V., San Francisco  International
Branch ("ABN") and CIBC Inc., as co-arrangers for the Banks,  Canadian  Imperial
Bank of  Commerce,  as  administrative  agent for the  Banks (in such  capacity,
"Administrative  Agent"),  ABN,  as  syndication  agent for the  Banks,  Bank of
America National Trust and Savings  Association,  as documentation agent for the
Banks, and certain  co-agents listed therein.  Unless otherwise  indicated,  all
terms defined in the Credit  Agreement  have the same  respective  meanings when
used herein.

         2. Pursuant to Subparagraph  2.01(b) of the Credit Agreement,  Borrower
irrevocably hereby requests a Borrowing upon the following terms:

                  (a) The principal  amount of the requested  Borrowing is to be
         $__________;

                  (b) The  requested  Borrowing is to consist of ["Base Rate" or
         "LIBOR"] Loans;

                  (c) If the  requested  Borrowing is to consist of LIBOR Loans,
         the  initial   Interest   Period  for  such  Revolving  Loans  will  be
         [__________ month[s]]; and

                  (d) The date of the requested  Borrowing is to be  __________,
         _____.

         3. Borrower  hereby  certifies to the Agents and the Banks that, on the
date of this  Notice of  Borrowing  and  after  giving  effect to the  requested
Borrowing:

                                       A-1
<PAGE>

                  (a) The  representations  and  warranties  of Borrower and its
         Subsidiaries set forth in Paragraph 4.01 of the Credit Agreement and in
         the  other  Credit  Documents  are true  and  correct  in all  material
         respects  as if made on  such  date  (except  for  representations  and
         warranties  expressly made as of a specified date, which are true as of
         such date); and

                  (b) No  Default  or  Event  of  Default  has  occurred  and is
         continuing or will result from the requested Borrowing.

         4.  Please  disburse  the  proceeds  of  the  requested   Borrowing  to
________________________________________________________________________________
______________________________________________________________.

         IN WITNESS  WHEREOF,  Borrower has executed this Notice of Borrowing on
the date set forth above.

                                         QUANTUM CORPORATION



                                         By:___________________________
                                           Name:_______________________
                                           Title:______________________



                                       A-2
<PAGE>

                                    EXHIBIT B

                              NOTICE OF CONVERSION

                                     [Date]


Canadian Imperial Bank of Commerce,
         as Administrative Agent
425 Lexington Avenue
New York, New York  10017
Attn:  Ian Palmer
       Syndications


         1. Reference is made to that certain Credit Agreement, dated as of June
6, 1997 (as amended from time to time,  the "Credit  Agreement"),  among Quantum
Corporation ("Borrower"), the financial institutions listed in Schedule I to the
Credit Agreement (the "Banks"), ABN AMRO Bank N.V., San Francisco  International
Branch ("ABN") and CIBC Inc., as co-arrangers for the Banks,  Canadian  Imperial
Bank of  Commerce,  as  administrative  agent for the  Banks (in such  capacity,
"Administrative  Agent"),  ABN,  as  syndication  agent for the  Banks,  Bank of
America National Trust and Savings  Association,  as documentation agent for the
Banks, and certain  co-agents listed therein.  Unless otherwise  indicated,  all
terms defined in the Credit  Agreement  have the same  respective  meanings when
used herein.

         2. Pursuant to Subparagraph  2.01(d) of the Credit Agreement,  Borrower
hereby irrevocably requests to convert a Borrowing as follows:

                  (a) The Borrowing to be converted  consists of ["Base Rate" or
         "LIBOR"] Loans in the aggregate  principal amount of $__________  which
         were initially advanced to Borrower on ___________, ____;

                  (b) The  Revolving  Loans in the Borrowing are to be converted
         into ["Base Rate" or "LIBOR"] Loans;

                  (c) If such  Revolving  Loans are to be  converted  into LIBOR
         Loans,  the initial Interest Period for such Revolving Loans commencing
         upon conversion will be [__________ month[s]]; and

                  (d) The date of the requested conversion is to be ___________,
         ____;

         3. Borrower  hereby  certifies to the Agents and the Banks that, on the
date of this Notice of  Conversion,  and after  giving  effect to the  requested
conversion,  no Default or Event of Default has  occurred and is  continuing  or
will result from the requested conversion.

                                       B-1
<PAGE>





                                       B-2

<PAGE>



         IN WITNESS WHEREOF,  Borrower has executed this Notice of Conversion on
the date set forth above.

                                           QUANTUM CORPORATION



                                           By:___________________________
                                             Name:_______________________
                                             Title:______________________


                                       B-3
<PAGE>

                                    EXHIBIT C

                       NOTICE OF INTEREST PERIOD SELECTION

                                     [Date]


Canadian Imperial Bank of Commerce,
         as Administrative Agent
425 Lexington Avenue
New York, New York  10017
Attn:  Ian Palmer
       Syndications


         1. Reference is made to that certain Credit Agreement, dated as of June
6, 1997 (as amended from time to time,  the "Credit  Agreement"),  among Quantum
Corporation ("Borrower"), the financial institutions listed in Schedule I to the
Credit Agreement (the "Banks"), ABN AMRO Bank N.V., San Francisco  International
Branch ("ABN") and CIBC Inc., as co-arrangers for the Banks,  Canadian  Imperial
Bank of  Commerce,  as  administrative  agent for the  Banks (in such  capacity,
"Administrative  Agent"),  ABN,  as  syndication  agent for the  Banks,  Bank of
America National Trust and Savings  Association,  as documentation agent for the
Banks, and certain  co-agents listed therein.  Unless otherwise  indicated,  all
terms defined in the Credit  Agreement  have the same  respective  meanings when
used herein.

         2. Pursuant to Subparagraph  2.01(e) of the Credit Agreement,  Borrower
hereby  irrevocably  selects  a new  Interest  Period  for a  Revolving  Loan as
follows:

                  (a) The  Borrowing  for which a new  Interest  Period is to be
         selected consists of LIBOR  Loans  in the aggregate principal amount of
         $__________ which were initially advanced to Borrower on _____________,
         _____ ;

                  (b)      The last day of the current Interest Period for such
         Revolving Loans is ___________, ____; and

                  (c)  The  next  Interest   Period  for  such  Revolving  Loans
         commencing  upon the last day of the current  Interest  Period is to be
         [_________ month[s]].

         3. Borrower  hereby  certifies to the Agents and the Banks that, on the
date of this Notice of Interest Period Selection, and after giving effect to the
requested  selection,  no  Default  or  Event of  Default  has  occurred  and is
continuing or will result from the requested selection.


                                       C-1
<PAGE>

         IN WITNESS  WHEREOF,  Borrower  has  executed  this  Notice of Interest
Period Selection on the date set forth above.

                                       QUANTUM CORPORATION



                                       By:___________________________
                                         Name:_______________________
                                         Title:______________________


                                       C-2

<PAGE>


                                    EXHIBIT D

                               REVOLVING LOAN NOTE


$_________________                                            ___________, _____
                                                              ____________, 1997


         FOR  VALUE  RECEIVED,   QUANTUM  CORPORATION,  a  Delaware  corporation
("Borrower"),     hereby     promises     to    pay    to    the     order    of
________________________________________   ("Bank"),   the   principal   sum  of
______________________________  DOLLARS ($__________),  or such lesser amount as
shall equal the aggregate  outstanding  principal balance of the Revolving Loans
made by Bank to Borrower pursuant to the Credit Agreement  referred to below (as
amended from time to time,  the "Credit  Agreement"),  on or before the Maturity
Date specified in the Credit Agreement, and to pay interest on said sum, or such
lesser amount, at the rates and on the dates provided in the Credit Agreement.

         Borrower shall make all payments  hereunder,  for the account of Bank's
Applicable  Lending Office, to  Administrative  Agent as indicated in the Credit
Agreement,  in lawful money of the United States and in same day or  immediately
available funds.

         Borrower hereby authorizes Bank to record on the schedule(s) annexed to
this note the date and  amount of each  Revolving  Loan and of each  payment  or
prepayment  of  principal  made by Borrower  and agrees that all such  notations
shall constitute prima facie evidence of the matters noted;  provided,  however,
that the failure of Bank to make any such notation  shall not affect  Borrower's
obligations hereunder.

         This  note is one of the Notes  referred  to in the  Credit  Agreement,
dated  as of June  6,  1997,  among  Borrower,  Bank  and  the  other  financial
institutions from time to time parties thereto (collectively,  the "Banks"), ABN
AMRO  Bank  N.V.,  San  Francisco   International   Branch  and  CIBC  Inc.,  as
co-arrangers  for  the  Banks,  and  Canadian  Imperial  Bank  of  Commerce,  as
administrative  agent for the  Banks.  This note is  subject to the terms of the
Credit  Agreement,  including  the  rights  of  prepayment  and  the  rights  of
acceleration of maturity set forth therein. The transfer,  sale or assignment of
any rights  under or  interest  in this note is subject to certain  restrictions
contained in the Credit Agreement,  including Paragraph 8.05 thereof. Terms used
herein have the meanings assigned to those terms in the Credit Agreement, unless
otherwise defined herein.

         Borrower  shall pay all reasonable  fees and expenses  payable to third
parties,   including  reasonable  attorneys'  fees,  incurred  by  Bank  in  the
enforcement  or attempt to enforce any of Borrower's  obligations  hereunder not
performed  when due.  Borrower  hereby  waives  notice of  presentment,  demand,
protest or notice of any

                                       D-1
<PAGE>

other kind.  This note shall be governed by and construed in accordance with the
laws of the State of California.


                                        QUANTUM CORPORATION


                                        By:___________________________
                                           Name:______________________
                                           Title:_____________________


                                       D-2

<PAGE>


                         LOANS AND PAYMENTS OF PRINCIPAL


- --------------------------------------------------------------------------------
                                              Amount of       Unpaid   
         Type of     Amount of   Interest   Principal Paid   Principal  Notation
 Date     Loan         Loan       Period      or Prepaid      Balance   Made By
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

                                       D-3
<PAGE>

                                    EXHIBIT E

                             COMPLIANCE CERTIFICATE

                                     [Date]


Canadian Imperial Bank of Commerce,
         as Administrative Agent
425 Lexington Avenue
New York, New York  10017
Attn:  Ian Palmer
       Syndications


         1. Reference is made to that certain Credit Agreement, dated as of June
6, 1997 (as amended from time to time,  the "Credit  Agreement"),  among Quantum
Corporation ("Borrower"), the financial institutions listed in Schedule I to the
Credit Agreement (the "Banks"), ABN AMRO Bank N.V., San Francisco  International
Branch ("ABN") and CIBC Inc., as co-arrangers for the Banks,  Canadian  Imperial
Bank of  Commerce,  as  administrative  agent for the  Banks (in such  capacity,
"Administrative  Agent"),  ABN,  as  syndication  agent for the  Banks,  Bank of
America National Trust and Savings  Association,  as documentation agent for the
Banks, and certain  co-agents listed therein.  Unless otherwise  indicated,  all
terms defined in the Credit  Agreement  have the same  respective  meanings when
used herein (including Attachment 1 hereto).

         2. Borrower hereby certifies to the Agents and the Banks as follows:

                  (a) In  connection  with  the  preparation  of  the  Financial
         Statements of Borrower for the [quarter][year]  ended __________,  ____
         (the  "Financial  Statements"),  the undersigned  Executive  Officer of
         Borrower  (the  "Undersigned")  has  reviewed  the terms of the  Credit
         Agreement and has made, or caused to be made, a detailed  review of the
         transactions  and financial  condition of Borrower and its Subsidiaries
         during the accounting period covered by the Financial Statements.

                  (b) The Undersigned did not discover during the course of such
         reviews,  and has no other  knowledge of, any event or condition  which
         constitutes  a  Default  or an  Event  of  Default  at  the  end of the
         accounting period covered by the Financial Statements or as of the date
         of this Compliance Certificate, except as follows:

                           [State  "None" or  describe  in  detail  any event or
                           condition which  constitutes a Default or an Event of
                           Default,  including  the period during which any such
                           event or condition has existed,  and the action which
                           Borrower proposes to take in connection therewith.]

                                       E-1
<PAGE>

                  (c) Set forth in  Attachment  1 hereto are true,  complete and
         accurate  computations  used in  determining  compliance  with  various
         covenants set forth in the Credit  Agreement for the period  covered by
         the Financial Statements and as of the last day of such period.

         IN WITNESS WHEREOF,  Borrower has executed this Compliance  Certificate
on the date set forth above.


                                        QUANTUM CORPORATION


                                        By:___________________________
                                           Name:______________________
                                           Title:_____________________


                                       E-2
<PAGE>

                                    EXHIBIT F

                             SUBORDINATED DEBT TERMS


         Section  [_].1  Agreement  of  Subordination.   [Quantum   Corporation]
covenants  and  agrees,  and  each  holder  of  Notes  issued  hereunder  by his
acceptance thereof likewise covenants and agrees, that all Notes shall be issued
subject to the  provisions  of this Article  [__];  and each Person  holding any
Note,  whether upon  original  issue or upon  transfer,  assignment  or exchange
thereof, accepts and agrees to be bound by such provisions.

         The payment of the principal of,  premium,  if any, and interest on all
Notes  (including,  but not limited to, the redemption price with respect to the
Notes  called  for  redemption  in  accordance   with  Section  [_]  [Notice  of
Redemption:  Selection of Notes] or submitted for redemption in accordance  with
Section [_]  [Redemption at Option of Holders],  as the case may be, as provided
in the  Indenture)  issued  hereunder  shall,  to the  extent  and in the manner
hereinafter set forth,  be  subordinated  and subject in right of payment to the
prior payment in full of all Senior  Indebtedness,  whether  outstanding  at the
date of this Indenture or thereafter incurred.

         No provision of this Article [_] shall  prevent the  occurrence  of any
default or Event of Default hereunder.

         Section [_].2  Payments to  Noteholders.  No payment shall be made with
respect to the  principal  of, or  premium,  if any,  or  interest  on the Notes
(including,  but not limited to, the redemption  price with respect to the Notes
to  be  called  for  redemption  in  accordance  with  Section  [_]  [Notice  of
Redemption:  Selection of Notes] or submitted for redemption in accordance  with
Section [_]  [Redemption at Option of Holders],  as the case may be, as provided
in the  Indenture),  except  payments and  distributions  made by the Trustee as
permitted by the first or second paragraph of Section [_].5, if:

         (i)      a default in the payment of principal, premium, interest, rent
                  or other obligations due on any Senior Indebtedness occurs and
                  is  continuing  (or,  in the case of Senior  Indebtedness  for
                  which  there  is a period  of  grace,  in the  event of such a
                  default  that  continues  beyond the period of grace,  if any,
                  specified in the  instrument or lease  evidencing  such Senior
                  Indebtedness),  unless and until such default  shall have been
                  cured or waived or shall have ceased to exist; or

         (ii)     a  default,  other  than a payment  default,  on a  Designated
                  Senior Indebtedness occurs and is continuing that then permits
                  holders of such Designated  Senior  Indebtedness to accelerate
                  its maturity and the Trustee  receives a notice of the default
                  (a  "Payment   Blockage  Notice")  from  a  Representative  or
                  [Quantum Corporation].

                                       F-1
<PAGE>

         If the Trustee  receives any Payment Blockage Notice pursuant to clause
(ii) above,  no  subsequent  Payment  Blockage  Notice  shall be  effective  for
purposes of this Section [_].2 unless and until (A) at least 365 days shall have
elapsed  since  the  initial  effectiveness  of the  immediately  prior  Payment
Blockage Notice, and (B) all scheduled payments of principal,  premium,  if any,
and interest on the Notes that have come due have been paid in full in cash.  No
nonpayment default that existed or was continuing on the date of delivery of any
Payment  Blockage  Notice to the Trustee  shall be, or be made,  the basis for a
subsequent Payment Blockage Notice.

         [Quantum   Corporation]   may  and  shall   resume   payments   on  and
distributions in respect of the Notes upon the earlier of:

         (1) the date  upon  which the  default  is cured or waived or ceases to
exist, or

         (2) in the case of a default referred to in clause (ii) above, 179 days
pass  after  notice  is  received  if the  maturity  of such  Designated  Senior
Indebtedness has not been accelerated,

unless this Article [_] otherwise  prohibits the payment or  distribution at the
time of such payment or distribution.

         Upon any payment by [Quantum Corporation], or distribution of assets of
[Quantum  Corporation]  of any kind or character,  whether in cash,  property or
securities,  to creditors  upon any  dissolution or winding-up or liquidation or
reorganization of [Quantum Corporation],  whether voluntary or involuntary or in
bankruptcy, insolvency, receivership or other proceedings, all amounts due or to
become due upon all Senior  Indebtedness  shall first be paid in full in cash or
other  payment  satisfactory  to the  holders of such  Senior  Indebtedness,  or
payment  thereof  in  accordance  with its terms  provided  for in cash or other
payment  satisfactory  to the  holders of such  Senior  Indebtedness  before any
payment is made on account of the principal of, premium,  if any, or interest on
the Notes (except  payments  made  pursuant to Article [_] [Trustee  Provisions]
from monies deposited with the Trustee pursuant thereto prior to commencement of
proceedings for such dissolution,  winding-up,  liquidation or  reorganization);
and upon any such dissolution or winding-up or liquidation or  reorganization of
[Quantum   Corporation]  or  bankruptcy,   insolvency,   receivership  or  other
proceeding,  any payment by [Quantum Corporation],  or distribution of assets of
[Quantum  Corporation]  of any kind or character,  whether in cash,  property or
securities,  to which the holders of the Notes or the Trustee would be entitled,
except for the  provision of this Article [_],  shall  (except as  aforesaid) be
paid  by  [Quantum  Corporation]  or by any  receiver,  trustee  in  bankruptcy,
liquidating trustee,  agent or other Person making such payment or distribution,
or by the  holders  of the  Notes or by the  Trustee  under  this  Indenture  if
received by them or it, directly to the holders of Senior Indebtedness (pro rata
to such holders on the basis of the  respective  amounts of Senior  Indebtedness
held by such

                                       F-2
<PAGE>

holders,   or  as  otherwise  required  by  law  or  a  court  order)  or  their
representative  or  representatives,  or to the  trustee or  trustees  under any
indenture pursuant to which any instruments  evidencing any Senior  Indebtedness
may have been issued,  as their respective  interests may appear,  to the extent
necessary  to pay all  Senior  Indebtedness  in full,  in cash or other  payment
satisfactory to the holders of such Senior Indebtedness,  after giving effect to
any  concurrent  payment  or  distribution  to or  for  the  holders  of  Senior
Indebtedness,  before any payment or  distribution is made to the holders of the
Notes or to the Trustee.

         For  purposes  of this  Article  [_],  the words,  "cash,  property  or
securities"  shall  not be  deemed  to  include  shares  of  stock  of  [Quantum
Corporation]   as  reorganized   or   readjusted,   or  securities  of  [Quantum
Corporation] or any other  corporation  provided for by a plan of reorganization
or  readjustment,  the payment of which is  subordinated  at least to the extent
provided  in this  Article  [_] with  respect to the Notes to the payment of all
Senior Indebtedness which may at the time be outstanding;  provided that (i) the
Senior  Indebtedness is assumed by the new corporation,  if any,  resulting from
any reorganization or readjustment, and (ii) the rights of the holders of Senior
Indebtedness  (other than leases which are not assumed by [Quantum  Corporation]
or the new corporation, as the case may be) are not, without the consent of such
holders,  altered by such  reorganization or readjustment.  The consolidation of
[Quantum Corporation] with, or the merger of [Quantum Corporation] into, another
corporation or the liquidation or dissolution of [Quantum Corporation] following
the conveyance or transfer of its property as an entirety,  or  substantially as
an entirety,  to another  corporation upon the terms and conditions provided for
in Article [_] [Consolidation,  Merger, Sale, Conveyance and Lease] shall not be
deemed a dissolution, winding-up, liquidation or reorganization for the purposes
of  this  Section  [_].2  if such  other  corporation  shall,  as a part of such
consolidation, merger, conveyance or transfer, comply with the conditions stated
in Article [_] [Consolidation, Merger, Sale, Conveyance and Lease].

         In the event of the  acceleration  of the Notes  because of an Event of
Default,  no payment or distribution  shall be made to the Trustee or any holder
of Notes in respect of the  principal  of,  premium,  if any, or interest on the
Notes  (including,  but not limited to, the redemption price with respect to the
Notes  called  for  redemption  in  accordance   with  Section  [_]  [Notice  of
Redemption;  Selection of Notes] or submitted for redemption in accordance  with
Section [__] [Redemption at Option of Holders],  as the case may be, as provided
in the  Indenture),  except  payments and  distributions  made by the Trustee as
permitted by the first or second  paragraph of Section  [_].5,  until all Senior
Indebtedness has been paid in full in cash or other payment  satisfactory to the
holders of Senior  Indebtedness or such  acceleration is rescinded in accordance
with the terms of this Indenture. If payment of the Notes is accelerated because
of an Event of Default,  [Quantum  Corporation] shall promptly notify holders of
Senior Indebtedness of the acceleration.

                                       F-3
<PAGE>

         In the  event  that,  notwithstanding  the  foregoing  provisions,  any
payment  or  distribution  of assets  of  [Quantum  Corporation]  of any kind or
character,   whether  in  cash,  property  or  securities  (including,   without
limitation, by way of setoff or otherwise),  prohibited by the foregoing,  shall
be  received  by the  Trustee  or the  holders  of the Notes  before  all Senior
Indebtedness  is paid in full in  cash  or  other  payment  satisfactory  to the
holders of such  Senior  Indebtedness,  or  provision  is made for such  payment
thereof in accordance  with its terms in cash or other payment  satisfactory  to
the holders of such Senior  Indebtedness,  such payment or distribution shall be
held in trust for the  benefit  of and shall be paid  over or  delivered  to the
holders of Senior Indebtedness or their representative or representatives, or to
the trustee or trustees  under any indenture  pursuant to which any  instruments
evidencing any Senior  Indebtedness  may have been issued,  as their  respective
interests may appear, as calculated by [Quantum Corporation], for application to
the payment of all Senior Indebtedness  remaining unpaid to the extent necessary
to pay all Senior Indebtedness in full in cash or other payment  satisfactory to
the holders of such Senior  Indebtedness,  after giving effect to any concurrent
payment or distribution to or for the holders of such Senior Indebtedness.

         Nothing in this Section [_].2 shall apply to claims of, or payments to,
the  Trustee  under or  pursuant to Section  [__][Compensation  and  Expenses of
Trustee].  This  Section  [_].2  shall be subject to the further  provisions  of
Section [_].5.

         Section [_].3  Subrogation of Notes.  Subject to the payment in full of
all  Senior  Indebtedness,  the  rights of the  holders  of the  Notes  shall be
subrogated to the extent of the payments or distributions made to the holders of
such Senior Indebtedness  pursuant to the provisions of this Article [_](equally
and ratably with the holders of all indebtedness of [Quantum  Corporation] which
by  its  express  terms  is  subordinated  to  other  indebtedness  of  [Quantum
Corporation] to substantially  the same extent as the Notes are subordinated and
is  entitled  to like  rights of  subrogation)  to the rights of the  holders of
Senior  Indebtedness to receive payments or  distributions of cash,  property or
securities of [Quantum Corporation]  applicable to the Senior Indebtedness until
the principal, premium, if any, and interest on the Notes shall be paid in full;
and, for the purposes of such  subrogation,  no payments or distributions to the
holders of the Senior  Indebtedness of any cash, property or securities to which
the  holders  of the  Notes or the  Trustee  would be  entitled  except  for the
provisions of this Article [_] and no payment over pursuant to the provisions of
this Article [_] to or for the benefit of the holders of Senior  Indebtedness by
holders of the Notes or the Trustee,  shall, as between  [Quantum  Corporation],
its creditors other than holders of Senior Indebtedness,  and the holders of the
Notes,  be deemed to be a payment by [Quantum  Corporation]  to or on account of
the Senior  Indebtedness;  and no payments or distributions of cash, property or
securities to or for the benefit of the holders of the Notes

                                       F-4
<PAGE>

pursuant  to the  subrogation  provisions  of  this  Article  [_],  which  would
otherwise have been paid to the holders of Senior  Indebtedness  shall be deemed
to be a payment by [Quantum  Corporation] to or for the account of the Notes. It
is  understood  that the  provisions  of this  Article [_] are and are  intended
solely for the purposes of defining  the  relative  rights of the holders of the
Notes, on the one hand, and the holders of the Senior Indebtedness, on the other
hand.

         Nothing contained in this Article [_] or elsewhere in this Indenture or
in the Notes is intended to or shall impair, as among [Quantum Corporation], its
creditors other than the holders of Senior Indebtedness,  and the holders of the
Notes,  the  obligation  of  [Quantum   Corporation],   which  is  absolute  and
unconditional, to pay to the holders of the Notes the principal of (and premium,
if any) and  interest  on the Notes as and when the same  shall  become  due and
payable in  accordance  with their terms,  or is intended to or shall affect the
relative  rights  of  the  holders  of  the  Notes  and  creditors  of  [Quantum
Corporation]  other  than the  holders  of the  Senior  Indebtedness,  nor shall
anything  herein or therein  prevent  the Trustee or the holder of any Note from
exercising all remedies otherwise permitted by applicable law upon default under
this  Indenture,  subject to the rights,  if any,  under this Article [_] of the
holders of Senior  Indebtedness  in respect of cash,  property or  securities of
[Quantum Corporation] received upon the exercise of any such remedy.

         Upon any payment or  distribution  of assets of  [Quantum  Corporation]
referred to in this  Article  [_], the  Trustee,  subject to the  provisions  of
Section [_] [Duties and  Responsibilities  of  Trustee],  and the holders of the
Notes  shall be  entitled  to rely upon any order or decree made by any court of
competent  jurisdiction  in  which  such  bankruptcy,  dissolution,  winding-up,
liquidation or reorganization  proceedings are pending,  or a certificate of the
receiver,  trustee in  bankruptcy,  liquidating  trustee,  agent or other person
making such payment or distribution,  delivered to the Trustee or to the holders
of  the  Notes,  for  the  purpose  of  ascertaining  the  persons  entitled  to
participate in such  distribution,  the holders of the Senior  Indebtedness  and
other  indebtedness  of  [Quantum  Corporation],  the amount  thereof or payable
thereon and all other facts pertinent thereto or to this Article [_].

         Section [_].4 Authorization to Effect  Subordination.  Each holder of a
Note by the holder's  acceptance  thereof  authorizes and directs the Trustee on
the holder's  behalf to take such action as may be necessary or  appropriate  to
effectuate  the  subordination  as provided in this Article [_] and appoints the
Trustee to act as the holder's  attorney-in-fact  for any and all such purposes.
If the  Trustee  does not  file a proper  proof of claim or proof of debt in the
form required in any  proceeding  referred to in the third  paragraph of Section
[_] [Payments of Notes on Default; Suit Therefor] hereof at least 30 days before
the  expiration  of the time to file  such  claim,  the  holders  of any  Senior
Indebtedness or their

                                       F-5
<PAGE>

representatives  are hereby  authorized to file an appropriate  claim for and on
behalf of the holders of the Notes.

         Section  [_].5  Notice to  Trustee.  [Quantum  Corporation]  shall give
prompt written  notice in the form of an Officers'  Certificate to a Responsible
Officer of the  Trustee  and to any paying  agent of any fact known to  [Quantum
Corporation]  which would  prohibit the making of any payment of monies to or by
the  Trustee  or any  paying  agent in  respect  of the  Notes  pursuant  to the
provisions of this Article [_].  Notwithstanding  the provisions of this Article
[_] or any other provision of this  Indenture,  the Trustee shall not be charged
with  knowledge of the existence of any facts which would prohibit the making of
any payment of monies to or by the  Trustee in respect of the Notes  pursuant to
the  provisions of this Article [_],  unless and until a Responsible  Officer of
the Trustee shall have received  written notice  thereof at the Corporate  Trust
Office from [Quantum Corporation] (in the form of an Officers' Certificate) or a
Representative or a holder or holders of Senior Indebtedness or from any trustee
thereof; and before the receipt of any such written notice, the Trustee, subject
to the provisions of Section [_] [Duties and Responsibilities of Trustee], shall
be entitled in all respects to assume that no such facts exist; provided that if
on a date not fewer  than one  Business  Day prior to the date upon which by the
terms  hereof any such monies may become  payable  for any  purpose  (including,
without  limitation,  the payment of the  principal  of, or premium,  if any, or
interest on any Note) the Trustee shall not have received,  with respect to such
monies,  the notice  provided for in this Section [_].5,  then,  anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority  to receive such monies and to apply the same to the purpose for which
they were  received,  and shall not be  affected  by any notice to the  contrary
which may be received by it on or after such prior date.

         Notwithstanding  anything in this Article [_] to the contrary,  nothing
shall prevent any payment by the Trustee to the Noteholders of monies  deposited
with it pursuant to Section [_] [Discharge of  Indenture],  and any such payment
shall not be subject to the provisions of Section [_].1 or [_].2.

         The  Trustee,  subject to the  provisions  of Section  [_]  [Duties and
Obligations  of  Trustee],  shall be entitled to rely on the delivery to it of a
written  notice by a  Representative  or a person  representing  himself to be a
holder  of Senior  Indebtedness  (or a trustee  on  behalf  of such  holder)  to
establish  that such  notice has been given by a  Representative  or a holder of
Senior Indebtedness or a trustee on behalf of any such holder or holders. In the
event  that the  Trustee  determines  in good  faith that  further  evidence  is
required  with  respect  to the  right  of any  person  as a  holder  of  Senior
Indebtedness  to  participate  in any payment or  distribution  pursuant to this
Article  [_],  the Trustee may  request  such person to furnish  evidence to the
reasonable  satisfaction of the Trustee as to the amount of Senior  Indebtedness
held by such person,  the extent to which such person is entitled to participate
in such

                                       F-6
<PAGE>

payment or  distribution  and any other  facts  pertinent  to the rights of such
person under this Article [_], and if such evidence is not furnished the Trustee
may defer any payment to such person pending  judicial  determination  as to the
right of such person to receive such payment.

         Section [_].6 Trustee's Relation to Senior Indebtedness. The Trustee in
its  individual  capacity  shall be entitled to all the rights set forth in this
Article [_] in respect of any Senior Indebtedness at any time held by it, to the
same extent as any other holder of Senior  Indebtedness,  and nothing in Section
[_]  [Limitations  on  Rights of  Trustee  as  Creditor]  or  elsewhere  in this
Indenture shall deprive the Trustee of any of its rights as such holder.

         With  respect  to the  holders  of  Senior  Indebtedness,  the  Trustee
undertakes to perform or to observe only such of its  covenants and  obligations
as are specifically  set forth in this Article [_], and no implied  covenants or
obligations  with  respect to the holders of Senior  Indebtedness  shall be read
into this Indenture against the Trustee.  The Trustee shall not be deemed to owe
any fiduciary  duty to the holders of Senior  Indebtedness  and,  subject to the
provisions of Section [_] [Duties and Obligations of Trustee], the Trustee shall
not be liable  to any  holder  of  Senior  Indebtedness  if it shall pay over or
deliver to holders of Notes,  [Quantum Corporation] or any other person money or
assets to which any holder of Senior Indebtedness shall be entitled by virtue of
this Article [_] or otherwise.

         Section [_].7 No Impairment of  Subordination.  No right of any present
or future holder of any Senior  Indebtedness to enforce  subordination as herein
provided  shall at any time in any way be  prejudiced  or impaired by any act or
failure to act on the part of [Quantum  Corporation] or by any act or failure to
act, in good faith,  by any such  holder,  or by any  noncompliance  by [Quantum
Corporation]  with  the  terms,  provisions  and  covenants  of this  Indenture,
regardless of any knowledge  thereof which any such holder may have or otherwise
be charged with.

         Section [_].8 Certain  Conversions Deemed Payment.  For the purposes of
this Article [_] only, (1) the issuance and delivery of junior  securities  upon
conversion of Notes in accordance  with Article [_]  [Conversion of Notes] shall
not be  deemed to  constitute  a  payment  or  distribution  on  account  of the
principal  of (or  premium,  if any) or  interest  on Notes or on account of the
purchase  or other  acquisition  of  Notes,  and (2) the  payment,  issuance  or
delivery  of cash  (except in  satisfaction  of  fractional  shares  pursuant to
Section  15.[_]  [Cash  Payment  in Lieu of  Fractional  Shares]),  property  or
securities  (other than junior  securities)  upon  conversion of a Note shall be
deemed to constitute  payment on account of the principal of such Note.  For the
purposes of this Section [_].8, the term "junior securities" means (a) shares of
any stock of any class of [Quantum  Corporation],  or (b) securities of [Quantum
Corporation] which are subordinated in right of payment to

                                       F-7
<PAGE>

all Senior  Indebtedness  which may be  outstanding  at the time of  issuance or
delivery of such securities to substantially the same extent as, or to a greater
extent  than,  the Notes are so  subordinated  as provided in this  Article [_].
Nothing  contained in this Article [_] or elsewhere in this  Indenture or in the
Notes is  intended  to or shall  impair,  as among  [Quantum  Corporation],  its
creditors other than holders of Senior  Indebtedness  and the  Noteholders,  the
right, which is absolute and unconditional, of the Holder of any Note to convert
such Note in accordance with Article [_] [Conversion of Notes].

         Section [_].9 Article  Applicable to Paying Agents.  If at any time any
paying  agent  other than the  Trustee  shall have been  appointed  by  [Quantum
Corporation]  and be then acting  hereunder,  the term "Trustee" as used in this
Article [_] shall  (unless the  context  otherwise  requires)  be  construed  as
extending to and including such paying agent within its meaning as fully for all
intents and  purposes as if such paying  agent were named in this Article [_] in
addition  to or in place  of the  Trustee;  provided,  however,  that the  first
paragraph  of Section  [_].5  shall not apply to  [Quantum  Corporation]  or any
Affiliate of [Quantum Corporation] if it or such Affiliate acts as paying agent.

         Section  [_].10 Senior  Indebtedness  Entitled to Rely.  The holders of
Senior   Indebtedness   (including,   without   limitation,   Designated  Senior
Indebtedness)  shall  have the  right to rely  upon  this  Article  [_],  and no
amendment or modification of the provisions  contained herein shall diminish the
rights of such holders unless such holders shall have agreed in writing thereto.

Definitions:

         Designated   Senior   Indebtedness:   The   term   "Designated   Senior
Indebtedness"  means the Sumitomo  Credit  Agreement and any  particular  Senior
Indebtedness  in which the  instrument  creating or  evidencing  the same or the
assumption  or guarantee  thereof (or related  agreements  or documents to which
[Quantum  Corporation]  is a party)  expressly  provides that such  Indebtedness
shall  be  "Designated  Senior  Indebtedness"  for  purposes  of  the  Indenture
(provided  that  such   instrument,   agreement  or  other  document  may  place
limitations and conditions on the right of such Senior  Indebtedness to exercise
the rights of Designated Senior Indebtedness). If any payment made to any holder
of any Designated Senior Indebtedness or its Representative with respect to such
Designated  Senior  Indebtedness  is rescinded or must  otherwise be returned by
such holder or Representative upon the insolvency,  bankruptcy or reorganization
of [Quantum Corporation] or otherwise,  the reinstated  Indebtedness of [Quantum
Corporation]  arising as a result of such rescission or return shall  constitute
Designated  Senior  Indebtedness  effective as of the date of such rescission or
return.

         Senior Indebtedness: The term "Senior Indebtedness" means the principal
of, premium, if any, interest (including all interest

                                       F-8
<PAGE>

accruing subsequent to the commencement of any bankruptcy or similar proceeding,
whether or not a claim for post-petition interest is allowable as a claim in any
such proceeding) and rent payable on or in connection with, and all fees, costs,
expenses and other amounts accrued or due on or in connection with, Indebtedness
of [Quantum  Corporation],  whether outstanding on the date of this Indenture or
thereafter  created,  incurred,  assumed,  guaranteed or in effect guaranteed by
[Quantum  Corporation]  (including  all  deferrals,   renewals,   extensions  or
refundings of, or amendments,  modifications  or supplements to, the foregoing),
unless in the case of any particular  Indebtedness  the  instrument  creating or
evidencing the same or the assumption or guarantee  thereof  expressly  provides
that such  Indebtedness  shall not be senior in right of payment to the Notes or
expressly  provides  that such  Indebtedness  is "pari passu" or "junior" to the
Notes.  Notwithstanding  the foregoing,  the term Senior  Indebtedness shall not
include any Indebtedness of [Quantum  Corporation] to any subsidiary of [Quantum
Corporation],  a majority  of the voting  stock of which is owned,  directly  or
indirectly,  by [Quantum Corporation] or [Quantum  Corporation]'s 5% Convertible
Subordinated  Debentures due April 1, 2002. If any payment made to any holder of
any Senior  Indebtedness  or its  Representative  with  respect  to such  Senior
Indebtedness  is  rescinded  or must  otherwise  be  returned  by such holder or
Representative  upon the insolvency,  bankruptcy or  reorganization  of [Quantum
Corporation] or otherwise,  the reinstated Indebtedness of [Quantum Corporation]
arising  as a result  of such  rescission  or  return  shall  constitute  Senior
Indebtedness effective as of the date of such rescission or return.

         Sumitomo Credit  Agreement:  The term "Sumitomo Credit Agreement" means
that  certain  Credit  Agreement,  dated as of  September  22, 1995 by and among
[Quantum  Corporation],   the  several  financial  institutions  listed  on  the
signature  pages thereto  (collectively,  the "Banks"),  and The Sumitomo  Bank,
Limited,  acting through its San Francisco  Branch,  as agent for the Banks (the
"Agent")  and as Issuer,  as amended,  amended  and  restated,  supplemented  or
otherwise modified from time to time.


                                       F-9
<PAGE>

                                    EXHIBIT G

                              ASSIGNMENT AGREEMENT


         THIS ASSIGNMENT AGREEMENT, dated as of the date set forth at the top of
Attachment 1 hereto, is by and among:

                  (1) The bank designated under item A of Attachment 1 hereto as
         the Assignor Bank ("Assignor Bank"); and

                  (2) Each bank  designated  under item B of Attachment 1 hereto
         as an Assignee Bank (individually, an "Assignee Bank").


                                    RECITALS

         A.  Assignor  Bank is one of the banks  which is a party to the  Credit
Agreement dated as of June 6, 1997, by and among Quantum Corporation, a Delaware
corporation  ("Borrower"),  Assignor Bank and the other  financial  institutions
parties thereto  (collectively,  the "Banks"), ABN AMRO Bank N.V., San Francisco
International  Branch  ("ABN")  and CIBC Inc.,  as  co-arrangers  for the Banks,
Canadian Imperial Bank of Commerce,  as  administrative  agent for the Banks (in
such capacity, "Administrative Agent"), ABN, as syndication agent for the Banks,
Bank of America National Trust and Savings  Association,  as documentation agent
for the Banks, and certain co-agents listed therein. (Such Credit Agreement,  as
amended,  supplemented  or otherwise  modified in accordance with its terms from
time to time to be referred to herein as the "Credit Agreement").

         B. Assignor Bank wishes to sell,  and Assignee Bank wishes to purchase,
a portion of  Assignor  Bank's  rights  under the Credit  Agreement  pursuant to
Subparagraph 8.05(c) of the Credit Agreement.


                                    AGREEMENT

         Now, therefore, the parties hereto hereby agree as follows:

         1.  Definitions.   Except  as  otherwise  defined  in  this  Assignment
Agreement, all capitalized terms used herein and defined in the Credit Agreement
have the respective meanings given to those terms in the Credit Agreement.

         2. Sale and  Assignment.  Subject to the terms and  conditions  of this
Assignment  Agreement,  Assignor Bank hereby agrees to sell, assign and delegate
to each Assignee  Bank and each Assignee Bank hereby agrees to purchase,  accept
and  assume an  undivided  interest  in and  share of  Assignor  Bank's  rights,
obligations and duties under the Credit Agreement and the other Credit Documents
equal to the  Proportionate  Share set forth  under the  caption  "Proportionate
Share" opposite such Assignee Bank's name on Attachment 1 hereto.

                                       G-1
<PAGE>

         3. Assignment Effective Upon Notice. Upon (a) receipt by Administrative
Agent of five (5) counterparts of this Assignment Agreement (to each of which is
attached a fully  completed  Attachment  1), each of which has been  executed by
Assignor  Bank and each  Assignee  Bank (and, if any Assignee Bank is not then a
Bank,  by  Borrower,  Administrative  Agent and  Issuing  Bank (if any)) and (b)
payment to Administrative Agent of the registration and processing fee specified
in Subparagraph 8.05(e) by Assignor Bank,  Administrative Agent will transmit to
Borrower,  Assignor Bank and each Assignee Bank an Assignment  Effective  Notice
substantially  in the form of  Attachment  2 hereto  (an  "Assignment  Effective
Notice"). Such Assignment Effective Notice shall set forth the date on which the
assignment  affected by this Assignment  Agreement  shall become  effective (the
"Assignment  Effective  Date"),  which  date  shall be the  fifth  Business  Day
following the date of such Assignment Effective Notice.

         4.  Assignment  Effective  Date. At or before 12:00 noon (local time of
Assignor Bank) on the Assignment Effective Date, each Assignee Bank shall pay to
Assignor  Bank, in immediately  available or same day funds,  an amount equal to
the purchase price, as agreed between  Assignor Bank and such Assignee Bank (the
"Purchase Price"),  for the Proportionate  Share purchased by such Assignee Bank
hereunder. Effective upon receipt by Assignor Bank of the Purchase Price payable
by each Assignee Bank, the sale, assignment and delegation to such Assignee Bank
of such  Proportionate  Share as  described  in  Paragraph 2 hereof shall become
effective.

         5. Payments After the Assignment Effective Date. Assignor Bank and each
Assignee Bank hereby agree that Administrative Agent shall, and hereby authorize
and direct  Administrative  Agent to, allocate  amounts payable under the Credit
Agreement and the other Credit  Documents as provided in the Credit Agreement in
accordance  with its  appropriate  Proportionate  Share.  Assignor Bank and each
Assignee  Bank have made separate  arrangements  for (i) the payment by Assignor
Bank to such Assignee  Bank of any  principal,  interest,  fees or other amounts
previously  received or otherwise payable to Assignor Bank hereunder if Assignor
Bank and such  Assignee  Bank have  otherwise  agreed that such Assignee Bank is
entitled to receive any such amounts and (ii) the payment by such  Assignee Bank
to Assignor Bank of any principal,  interest,  fees or other amounts  payable to
such  Assignee  Bank  hereunder  if Assignor  Bank and such  Assignee  Bank have
otherwise agreed that Assignor Bank is entitled to receive any such amounts.

         6. Delivery of Notes.  On or prior to the  Assignment  Effective  Date,
Assignor Bank will deliver to Administrative  Agent the Note payable to Assignor
Bank. On or prior to the  Assignment  Effective  Date,  Borrower will deliver to
Administrative  Agent a Note for each Assignee  Bank and Assignor  Bank, in each
case a in principal amount reflecting,  in accordance with the Credit Agreement,
their respective Commitment (as adjusted pursuant to this Assignment Agreement).
As provided in Subparagraph 8.05(c) of

                                       G-2
<PAGE>
the Credit  Agreement,  each such new Note shall be dated the  Closing  Date and
otherwise be in the form of Note replaced thereby  (provided that Borrower shall
not be  obligated to pay any  principal  paid or interest  accrued  prior to the
effective  date of this  assignment to the Assignee  Bank).  Promptly  after the
Assignment  Effective Date,  Administrative  Agent will send to each of Assignor
Bank  and the  Assignee  Banks  its new  Note  and  will  send to  Borrower  the
superseded Note of Assignor Bank, marked "replaced."

         7.  Delivery  of  Copies  of Credit  Documents.  Concurrently  with the
execution and delivery hereof,  Assignor Bank will provide to each Assignee Bank
(if it is not already a Bank party to the Credit Agreement)  conformed copies of
all  documents  delivered  to Assignor  Bank on or prior to the Closing  Date in
satisfaction of the conditions precedent set forth in the Credit Agreement.

         8. Further Assurances. Each of the parties to this Assignment Agreement
agrees  that at any time and from time to time upon the  written  request of any
other party,  it will execute and deliver  such  further  documents  and do such
further acts and things as such other party may  reasonably  request in order to
effect the purposes of this Assignment Agreement.

         9. Further Representations, Warranties and Covenants. Assignor Bank and
each  Assignee  Bank further  represent  and warrant to and  covenant  with each
other, Administrative Agent, the Co-Arrangers and the Banks as follows:

                  (a) Other than the  representation and warranty that it is the
         legal and beneficial  owner of the interest being assigned  hereby free
         and clear of any adverse claim,  Assignor Bank makes no  representation
         or  warranty  and  assumes  no  responsibility   with  respect  to  any
         statements, warranties or representations made in or in connection with
         the Credit  Agreement or the other Credit  Documents or the  execution,
         legality, validity, enforceability,  genuineness,  sufficiency or value
         of the Credit Agreement or the other Credit Documents furnished.

                  (b)  Assignor  Bank makes no  representation  or warranty  and
         assumes no  responsibility  with respect to the financial  condition of
         Borrower or any of its  obligations  under the Credit  Agreement or any
         other Credit Documents.

                  (c) Each Assignee Bank confirms that it has received a copy of
         the Credit Agreement and such other documents and information as it has
         deemed  appropriate  to make its own credit  analysis  and  decision to
         enter into this Assignment Agreement.

                  (d)  Each  Assignee  Bank  will,   independently  and  without
         reliance  upon any  Agent,  Assignor  Bank or any other  Bank Party and
         based upon such documents and information as it shall deem  appropriate
         at the time, continue to make its own credit

                                       G-3
<PAGE>

         decisions in taking or not taking action under the Credit Agreement and
         the other Credit Documents.

                  (e) Each Assignee Bank appoints and authorizes  Agents to take
         such action as Agents on its behalf and to exercise  such powers  under
         the Credit Agreement and the other Credit Documents as are delegated to
         Agents  by  the  terms  thereof,  together  with  such  powers  as  are
         reasonably  incidental  thereto,  all in accordance with Section VII of
         the Credit Agreement.

                  (f)  Each  Assignee  Bank  agrees  that  it  will  perform  in
         accordance with their terms all of the  obligations  which by the terms
         of the Credit  Agreement and the other Credit Documents are required to
         be performed by it as a Bank.

                  (g)  Attachment 1 hereto sets forth the revised  Proportionate
         Share of Assignor Bank and each Assignee Bank as well as administrative
         information with respect to each Assignee Bank.

         10. Effect of this  Assignment  Agreement.  On and after the Assignment
Effective  Date,  (a) each  Assignee  Bank shall be a Bank with a  Proportionate
Share as set forth on Attachment 1 hereto and shall have the rights,  duties and
obligations  of such a Bank  under the  Credit  Agreement  and the other  Credit
Documents  and (b) Assignor Bank shall be a Bank with a  Proportionate  Share as
set forth on  Attachment 1 hereto,  or, if the  Proportionate  Share of Assignor
Bank has been reduced to 0%, Assignor Bank shall cease to be a Bank.

         11. Miscellaneous.  This Assignment Agreement shall be governed by, and
construed in accordance  with,  the laws of the State of  California.  Paragraph
headings in this Assignment  Agreement are for convenience of reference only and
are not part of the substance hereof.

                                       G-4
<PAGE>

         IN WITNESS  WHEREOF,  the parties  hereto  have caused this  Assignment
Agreement to be executed by their respective duly authorized  officers as of the
date set forth in Attachment 1 hereto.


                                               _____________________________, 
                                               as an Assignee Bank
                                           
                                           
                                           
                                               By:___________________________
                                                  Name:______________________
                                                  Title:_____________________
                                           
                                           
                                               _____________________________,
                                               as an Assignee Bank
                                           
                                           
                                           
                                               By:___________________________
                                                  Name:______________________
                                                  Title:_____________________
                                           
                                           
                                               _____________________________,
                                               as an Assignee Bank
                                           
                                           
                                           
                                               By:___________________________
                                                  Name:______________________
                                                  Title:_____________________
                                           
                                           
                                           
                                               _____________________________,
                                               as an Assignee Bank
                                           
                                           
                                           
                                               By:___________________________
                                                  Name:______________________
                                                  Title:_____________________
                                           
                                 
                                       G-5
<PAGE>

CONSENTED TO AND ACKNOWLEDGED BY:

QUANTUM CORPORATION


By:___________________________
   Name:______________________
   Title:_____________________


CANADIAN IMPERIAL BANK OF COMMERCE,
  As Administrative Agent


By:___________________________
   Name:______________________
   Title:_____________________


ACCEPTED FOR RECORDATION
  IN REGISTER:


CANADIAN IMPERIAL BANK OF COMMERCE,
  As Administrative Agent


By:___________________________
   Name:______________________
   Title:_____________________


                                       G-6
<PAGE>

                                  ATTACHMENT 1
                             TO ASSIGNMENT AGREEMENT


                    NAMES, ADDRESSES AND PROPORTIONATE SHARES
              OF ASSIGNOR BANK AND ASSIGNEE BANKS AFTER ASSIGNMENT

                              --------------, ----




                                                               Proportionate
A.       ASSIGNOR BANK                                             Share*

         ------------------------------                           -----%

         Applicable Lending Office:

         ------------------------------
         ------------------------------
         ------------------------------
         ------------------------------


         Address for notices:

         ------------------------------
         ------------------------------
         ------------------------------
         ------------------------------

         Telephone No:  __________
         Facsimile No:  __________

         Wiring Instructions:

         ------------------------------
         ------------------------------

B.       ASSIGNEE BANKS

         ------------------------------                           -----%

         Applicable Lending Office:

         ------------------------------
         ------------------------------
         ------------------------------
         ------------------------------


- --------

* To be expressed by a percentage  rounded to the  eighth-digit  to the right of
the decimal point.

                                     G[1]-1
<PAGE>

                                                                  Proportionate
                                                                      Share*


B.       ASSIGNEE BANKS (cont'd)

         Address for notices:

         ------------------------------
         ------------------------------
         ------------------------------
         ------------------------------

         Telephone No:  __________
         Facsimile No:  __________

         Wiring Instructions:

         ------------------------------
         ------------------------------



         ------------------------------                              -----%

         Applicable Lending Office:

         ------------------------------
         ------------------------------

         Address for notices:

         ------------------------------
         ------------------------------
         ------------------------------
         ------------------------------

         Telephone No:  __________
         Facsimile No:  __________

         Wiring Instructions:

         ------------------------------
         ------------------------------

                                     G[1]-2
<PAGE>


                                  ATTACHMENT 2
                             TO ASSIGNMENT AGREEMENT

                                     FORM OF
                           ASSIGNMENT EFFECTIVE NOTICE

         The undersigned, as administrative agent for the banks under the Credit
Agreement, dated as of June 6, 1997 (as amended from time to time) among Quantum
Corporation  ("Borrower"),  the  financial  institutions  parties  thereto  (the
"Banks") ABN AMRO Bank N.V., San Francisco International Branch ("ABN") and CIBC
Inc., as  co-arrangers  for the Banks,  Canadian  Imperial Bank of Commerce,  as
administrative agent for the Banks (in such capacity,  "Administrative  Agent"),
ABN, as  syndication  agent for the Banks,  Bank of America  National  Trust and
Savings Association, as documentation agent for the Banks, and certain co-agents
listed  therein,  acknowledges  receipt  of  five  executed  counterparts  of  a
completed  Assignment  Agreement,  a copy of which is  attached  hereto.  [Note:
Attach copy of Assignment Agreement.] Terms defined in such Assignment Agreement
are used herein as therein defined.

         1.  Pursuant to such  Assignment  Agreement,  you are advised  that the
Assignment  Effective  Date  will  be  __________  [Insert  fifth  business  day
following date of Assignment Effective Notice].

         2. Pursuant to such Assignment Agreement,  Assignor Bank is required to
deliver to Administrative  Agent on or before the Assignment  Effective Date the
Note payable to Assignor Bank.

         3.  Pursuant  to such  Assignment  Agreement,  Borrower  is required to
deliver to Administrative  Agent on or before the Assignment  Effective Date the
following Notes, each dated _________________ [Insert appropriate date]:

         [Describe  each new Note for Assignor Bank and each Assignee Bank as to
principal amount.]

         4.  Pursuant  to  such  Assignment  Agreement,  each  Assignee  Bank is
required  to pay its  Purchase  Price to Assignor  Bank at or before  12:00 Noon
(local time of Assignor  Bank) on the  Assignment  Effective Date in immediately
available funds.

                                       Very truly yours,

                                       CANADIAN IMPERIAL BANK OF COMMERCE,
                                         as Administrative Agent



                                       By:___________________________
                                       Name:_________________________
                                       Title:________________________


                                     G[2]-1






                      AMENDED AND RESTATED MASTER AGREEMENT

                                     BETWEEN

                MATSUSHITA-KOTOBUKI ELECTRONICS INDUSTRIES, LTD.,

                                       AND

                               QUANTUM CORPORATION






<PAGE>

<TABLE>


                                                 TABLE OF CONTENTS
<CAPTION>

                                                                                                                      Page
<S>                                                                                                                   <C>
1. ROLES...............................................................................................................2
   1.1. Quantum........................................................................................................2
   1.2. MKE............................................................................................................2
   1.3. Cooperative Roles..............................................................................................2
   1.4. Regular Meetings...............................................................................................2
2. DEFINITIONS.........................................................................................................2
   2.1. "Components"...................................................................................................2
   2.2. "Confidential Information".....................................................................................2
   2.3. "Development Costs"............................................................................................2
   2.4. "Exclusive"....................................................................................................2
   2.5. "Manufacturing Costs"..........................................................................................2
   2.6. "MEI"..........................................................................................................3
   2.7. "Products".....................................................................................................3
   2.8. "Quantum"......................................................................................................3
   2.9. "Technical Information"........................................................................................3
3. MARKETING RIGHTS....................................................................................................3
   3.1. Quantum Rights.................................................................................................3
   3.2. Marketing Decisions............................................................................................4
   3.3. Product Components.............................................................................................4
   3.4. MKE Cooperation................................................................................................4
4. MANUFACTURING RIGHTS................................................................................................4
   4.1. MKE Rights.....................................................................................................4
   4.2. Manufacturing Decisions........................................................................................4
   4.3. Quantum Manufacturing..........................................................................................4
   4.4. Third Party Manufacturing......................................................................................5
   4.5. Non-Competitive Products.......................................................................................5
5. DEVELOPMENT AND MANUFACTURING COSTS.................................................................................6
   5.1. Development Costs..............................................................................................6
   5.2. Manufacturing Costs............................................................................................6
   5.3. Technology Exchange Costs......................................................................................6
   5.4. Component Development Costs....................................................................................6
6. EXCLUDED PRODUCTS; PRODUCT DEVELOPMENT..............................................................................6
   6.1. Excluded Products..............................................................................................6
   6.2. Development....................................................................................................6
   6.3. Development of New HDD Technology and Products.................................................................7
   6.4. Product Changes................................................................................................7
7. COMPONENTS..........................................................................................................8
   7.1. Component Integration..........................................................................................8
   7.2. Component Purchases............................................................................................8
8. TECHNICAL COOPERATION...............................................................................................8
9. PROPRIETARY RIGHTS..................................................................................................8
   9.1. Right To Use...................................................................................................8

                                                      i
<PAGE>

                                                 TABLE OF CONTENTS

                                                                                                                      Page

   9.2. Product Designs and Manufacturing Processes....................................................................8
   9.3. Patents........................................................................................................9
   9.4. Patent Protection..............................................................................................9
   9.5. Patent Rights..................................................................................................9
   9.6. Trademarks.....................................................................................................9
   9.7. Patent Contributions...........................................................................................9
10. CONFIDENTIALITY....................................................................................................9
   10.1. Confidentiality...............................................................................................9
   10.2. Restrictions..................................................................................................9
11. PATENT INDEMNIFICATION............................................................................................10
12. PURCHASE AGREEMENT................................................................................................12
   12.1. Purpose......................................................................................................12
13. TERM AND TERMINATION..............................................................................................12
   13.1. Term.........................................................................................................12
   13.2. Interim Review Prior to Scheduled Termination................................................................12
   13.3. Termination..................................................................................................12
   13.4. Rights Upon Termination......................................................................................13
14. ARBITRATION.......................................................................................................13
15. GOVERNMENTAL CONSENTS.............................................................................................14
   15.1. U.S. Requirements............................................................................................14
   15.2. Japan Requirements...........................................................................................14
   15.3. Visas........................................................................................................14
   15.4. Compliance with Laws.........................................................................................14
16. MISCELLANEOUS.....................................................................................................14
   16.1. Nonassignability.............................................................................................14
   16.2. Failure to Enforce...........................................................................................15
   16.3. Governing Law................................................................................................15
   16.4. Severability.................................................................................................15
   16.5. Notices......................................................................................................15
   16.6. Entire Agreement.............................................................................................16
   16.7. Force Majeure................................................................................................16
   16.8. Limitation of Liability......................................................................................16
   16.9. MEI..........................................................................................................16
   16.10. Binding.....................................................................................................16
   16.11. Agency......................................................................................................17
   16.12. Headings....................................................................................................17
   16.13. Changes in Control..........................................................................................17
   16.14. Bankruptcy Code.............................................................................................17

                                                    ii
</TABLE>

<PAGE>

                  AMENDED AND RESTATED MASTER AGREEMENT BETWEEN
                MATSUSHITA-KOTOBUKI ELECTRONICS INDUSTRIES, LTD.,
                             AND QUANTUM CORPORATION

THIS   AMENDED   AND   RESTATED   MASTER   AGREEMENT   is  made  by  and   among
MATSUSHITA-KOTOBUKI  ELECTRONICS INDUSTRIES,  LTD., a Japanese corporation,  its
subsidiaries,   IRELAND  KOTOBUKI  ELECTRONICS  INDUSTRIES,   LTD.  ,  an  Irish
corporation,  and KOTOBUKI  ELECTRONICS  INDUSTRIES  (S) PTE.  LTD., a Singapore
corporation   (collectively,   "MKE")  and  QUANTUM   CORPORATION,   a  Delaware
corporation,  and  its  subsidiary  QUANTUM  PERIPHERALS  (EUROPE)  SA,  a Swiss
corporation (hereinafter collectively "Quantum"). This Agreement is entered into
as of the 30th day of April, 1997 (the "Effective Date").

                                    RECITALS:

WHEREAS,  Quantum is a leader in designing,  developing  and marketing hard disk
drive products,  and computer memory storage products for worldwide business and
consumer markets and MKE is a leader in manufacturing hard disk drive products;

WHEREAS,  Quantum and MKE have been  partners in a  manufacturing  and marketing
relationship since 1985 pursuant to which MKE has manufactured,  and Quantum has
marketed, hard disk drive products which Quantum has designed and developed;

WHEREAS,  Quantum and MKE entered into an agreement on December 31, 1992 setting
forth the terms of such manufacturing and marketing relationship;

WHEREAS,  Quantum and MKE are desirous of continuing  their  long-term  business
relationship and wish to continue such relationship as herein provided;

WHEREAS,  Quantum has the exclusive right to market all hard disk drive products
manufactured  or to be  manufactured  by MKE,  excluding  only hard disk  drives
developed by MKE and/or MEI which do not utilize  Technical  Information  and/or
Confidential Information of Quantum;

WHEREAS,  MKE has the exclusive  right to  manufacture  all such hard disk drive
products for Quantum;

WHEREAS,  each of Quantum and MKE is willing to grant such exclusive  rights and
MKE is willing to manufacture such products; and

WHEREAS,  as a result of the expanded scope of their manufacturing and marketing
relationship, Quantum and MKE now desire that the terms of the agreement between
the parties  dated as of December 31, 1992,  as amended  September 1, 1994,  and
January  26, 1996 (the  "Master  Agreement"),  be amended and  restated in their
entirety as set forth herein;

                                       1

<PAGE>


                                   AGREEMENT:

NOW,  THEREFORE,  in  consideration of the mutual covenants and promises in this
Agreement, the parties agree as follows:

1.       ROLES.

     1.1.  Quantum.  Subject  to the terms  and  conditions  of this  Agreement,
Quantum shall have the responsibility for product  development and design of the
Products (as  hereinafter  defined) and  completion  of the  prototype  thereof.
Except  as  expressly  set  forth  herein,  Quantum  shall  have the  Exclusive,
worldwide right to market, offer to sell and sell the Products.

     1.2. MKE. Subject to the terms and conditions of this Agreement,  MKE shall
have the  Exclusive,  worldwide  right and  responsibility  to  manufacture  the
Products  designed by Quantum and to be purchased by Quantum under the terms and
conditions  hereof.  MKE shall be responsible  for the purchase and ownership of
such  facilities and capital  equipment as MKE may determine to be necessary for
Product manufacture.

     1.3.  Cooperative  Roles.  The  parties  have  worked  together  over  time
regarding  the  manufacture  of the Products and have  established  a successful
working relationship for discussing and implementing  operational details of the
development,  manufacture and supply of Products. The parties intend to continue
this  successful  operational  relationship.  MKE and Quantum  intend that sound
cooperation  will result from the  contributions of each party and this division
of responsibilities.  Both parties understand, however, that full cooperation is
necessary to fully develop this business and achieve the potential opportunities
in this new market.

     1.4. Regular Meetings. MKE and Quantum shall hold regular meetings, but not
less than once each calendar quarter,  at a location  alternating  between Japan
and  California,  to discuss and confer on issues relating to the joint interest
of the parties in  developing,  manufacturing  and marketing  the Products.  The
matters to be discussed at such meetings shall include, without limitation,  new
product  development,  manufacturing  process  development,  marketing strategy,
financial matters and technology strategy.

2.       DEFINITIONS.

The  following  terms,  as used in  this  Agreement,  shall  have  the  meanings
referenced below:

     2.1.  "Components"  shall mean parts and components  specially  designed by
Quantum or MKE which are  included  in a  Product,  including  heads,  disks and
motors.

     2.2. "Confidential Information" shall have the meaning set forth in Section
10.1.

     2.3.  "Development  Costs"  shall  mean all  expenditures  associated  with
Product   development   until  the  completion  of  the  drawings  defining  the
requirements  and design of the Products,  including  testing and  completion of
prototypes, up to the stage that such Products can be put into pre-production by
MKE in Japan.

     2.4. "Exclusive" shall mean sole rights excluding all other parties.

     2.5.  "Manufacturing  Costs" shall mean all costs of the design development
and  construction  of the  manufacturing  hardware for the  Products,  including
tooling design and equipment acquisition.

                                       2

<PAGE>

     2.6.  "MEI"  shall  mean  Matsushita   Electric  Industrial  Co.,  Ltd.,  a
corporation  organized  under the laws of Japan,  having its principal  place of
business at 1006, Kadoma, Osaka 571 Japan.

     2.7.  "Products"     [CONFIDENTIAL TREATMENT REQUESTED]

     2.8.   "Quantum"   shall  also  include  any   subsidiary  of  Quantum  not
specifically referenced above.

     2.9.  "Technical  Information"  shall mean all non-public  information  and
know-how which is  proprietary  to Quantum or MKE, as the case may be,  directly
related to the  development  and  manufacturing  of any Products,  including all
inventions,  processes  and  discoveries  known,  actively  used,  or  hereafter
developed  by  either  party  with  respect  thereto  during  the  term  of this
Agreement. Technical Information shall be mutually exchanged between the parties
solely for the  purpose of  contributing  to, or  assisting  with,  the  design,
manufacturing,  marketing,  testing and service of the  Products,  provided that
either party has the right to transfer such  information  without the consent of
or payment  of  royalties  to a third  party,  and  further  provided  that such
Technical  Information  as will be transferred by MKE to Quantum may not be used
for Quantum's  manufacturing  of any product,  including  the Products,  without
MKE's prior written consent.  Notwithstanding anything to the contrary contained
herein,  no  exchange  of  Technical  Information  shall be deemed to  transfer,
license or  otherwise  assign from one party to the other party any  proprietary
rights any party hereto may have in the Technical Information.

3.       MARKETING RIGHTS.

     3.1. Quantum Rights. Subject to the terms and conditions of this Agreement,
Quantum shall have the Exclusive worldwide rights to market, distribute and sell
Products  during  the term of this  Agreement.  Quantum  agrees  to use its best
efforts to market and sell Products  subject to the terms and conditions of this
Agreement.   

                       [CONFIDENTIAL TREATMENT REQUESTED]

                                       3

<PAGE>

                       [CONFIDENTIAL TREATMENT REQUESTED]

     3.2.  Marketing  Decisions.  Except as  expressly  set forth in Section 3.1
("Quantum  Rights")  above,  Quantum  will  have  complete   responsibility  and
authority  for all  decisions  regarding the marketing and sale of the Products.
Quantum will evaluate and determine the distribution  methods,  the organization
to be  established,  the  customers  to whom the  Products  will be sold and the
strategy to be utilized.  Quantum shall further be responsible  for planning and
reviewing marketing opportunities. Quantum is responsible for all costs incurred
in the sale and marketing of the Products. Quantum agrees that all Products will
be manufactured by and purchased from MKE, except as otherwise  provided in this
Agreement.

     3.3.  Product  Components.  During the term of this Agreement,  the parties
contemplate  that a number of the  Components,  which are integral  parts of the
Products,  will be developed.  MKE anticipates  that certain  Components will be
useful in other  products  and that sales  opportunities  will  develop for such
Components. If MKE desires to market any such Component to the mutual benefit of
both parties,  the parties agree to enter into good faith  discussions  to reach
agreement on MKE's marketing  rights,  although neither party shall be obligated
to enter into any such  agreement.  Nothing  herein shall limit MKE's ability to
manufacture  and market parts and  components for MKE Customers or third parties
which do not utilize Quantum Technical Information.

     3.4. MKE Cooperation.  With the prior approval of MKE, MKE shall permit the
customers of Quantum to tour and evaluate MKE's manufacturing facilities for the
Products.

4.       MANUFACTURING RIGHTS.

     4.1. MKE Rights.  Subject to the terms and  conditions  of this  Agreement,
Quantum hereby grants MKE the Exclusive  worldwide rights to manufacture any and
all Products during the term of this Agreement.  MKE shall not have the right to
grant rights to manufacture or have  manufactured the Products without Quantum's
written consent.

     4.2.  Manufacturing  Decisions.  MKE will have complete  responsibility and
authority  for  the  development  of  manufacturing  processes,  acquisition  of
production equipment and the construction of facilities. [CONFIDENTIAL TREATMENT
REQUESTED]  Except as  expressly  set forth in Section  3.1  ("Quantum  Rights")
above, all Products manufactured by MKE will be sold to and marketed by Quantum.

     4.3. Quantum  Manufacturing.  The parties  understand that the assurance of
continued  production of quality and low-cost  Products is critical to Quantum's
business and that Quantum is relying on MKE as the sole source of the  Products.
[CONFIDENTIAL TREATMENT REQUESTED]

                                        4
<PAGE>

                       [CONFIDENTIAL TREATMENT REQUESTED]

     4.4. [CONFIDENTIAL TREATMENT REQUESTED]

     4.5.  Non-Competitive  Products.  On a case-by-case basis, the parties will
negotiate  in good  faith  the  rights  and  consideration  to use each  other's
Technical  Information  and/or other intellectual  property for  non-competitive
products  or to work  together to produce  such  non-competitive  products.  For
purposes hereof,  "non-competitive products" are products that would not compete
with  then-existing  or  contemplated  Products as  mutually  agreed upon by the
Parties.

                                       5

<PAGE>

5.       DEVELOPMENT AND MANUFACTURING COSTS.

     5.1. Development Costs.

          a. [CONFIDENTIAL TREATMENT REQUESTED]

          b. [CONFIDENTIAL TREATMENT REQUESTED]

     5.2. Manufacturing Costs.

          a. [CONFIDENTIAL TREATMENT REQUESTED]

          b. [CONFIDENTIAL TREATMENT REQUESTED]

     5.3.  Technology  Exchange  Costs.  MKE  and  Quantum  will  be  exchanging
engineering  personnel  as part of the initial and ongoing  technology  exchange
under Section 8 ("Technical Cooperation"). [CONFIDENTIAL TREATMENT REQUESTED]

     5.4.  Component  Development  Costs.  The parties  expect that further cost
reductions  will be achieved in the Products after they are developed by further
development of Components through vertical integration techniques. [CONFIDENTIAL
TREATMENT REQUESTED]

6.       EXCLUDED PRODUCTS; PRODUCT DEVELOPMENT.

     6.1.  Excluded  Products.  MKE  shall be free to  pursue  the  development,
manufacture  and sale of any  products,  including but not limited to components
and parts, not utilizing the Technical Information of Quantum as is confidential
pursuant to the provisions of Section 10 ("Confidentiality") hereof.

     6.2. Development. For each Product proposed by Quantum and determined to be
economically  attractive  for  production  under this  Agreement,  [CONFIDENTIAL
TREATMENT  REQUESTED]  MKE and  Quantum  will work  together  in  selecting  and
locating low-cost component sources on a worldwide basis. The Product design and
key  component  design  will be  transferred  by Quantum  for MKE to develop the
processes and tooling to manufacture

                                       6
<PAGE>

the Product.  The parties  recognize that the development  process  necessary to
insure that the developed Product will be complementary with MKE's manufacturing
processes,   while   requiring  the   assistance  of  MKE,  shall  be  the  sole
responsibility of Quantum.

     6.3.  Development of New HDD Technology and Products.

          a.  [CONFIDENTIAL TREATMENT REQUESTED]

          b.  [CONFIDENTIAL TREATMENT REQUESTED]

          c.  In  accordance  with  Section  9  ("Proprietary  Rights")  of this
Agreement,  MKE shall own all rights to any new manufacturing process technology
developed  under  this  Section  6.3.  In  accordance  with  Section  9 of  this
Agreement,  Quantum  shall own all rights to any new Product  design  technology
developed by employees,  agents and  consultants  of MKE under this Section 6.3;
provided, however, that such ownership shall not impair MKE's rights to use such
technology as provided in paragraph (b) of this Section 6.3.

     6.4.  Product  Changes.  Quantum shall have the right to control changes to
the  Products  provided  that  any  changes  that  would  materially  alter  the
manufacturing  process or cost shall require MKE's prior written  consent,  such
consent not to be unreasonably  withheld or delayed. If MKE believes that design
changes to the Products are  beneficial,  the proposed change shall be submitted
to Quantum for approval,  such  approval not to be  unreasonably  withheld.  MKE
understands  that after the  Products are  introduced  into the  marketplace  by
Quantum that  subsequent  changes may affect the design of the system into which
an OEM incorporated such Product. MKE agrees to notify Quantum of any changes in
the manufacturing  process employed by MKE that may affect form, fit,  function,
or reliability of the Product.  Enhancements  and  modifications  to the Product
design may be submitted from time to time by Quantum and MKE agrees to cooperate
in promptly  incorporating  such  revised  design in the  manufacturing  process
subject to the  sufficient  time  allowance  and the changes in the price of the
Products to be paid by Quantum to MKE.

                                       7

<PAGE>

7.       COMPONENTS.

     7.1. Component Integration. After product designs are submitted to MKE, the
key  Components  of the  design  will be  integrated  by MKE for  cost-effective
manufacturing  to  the  extent  the  parties  mutually  agree.  As  part  of the
integration and cost reduction of the manufacturing  process,  Components may be
jointly redesigned or additional Components may be developed.

     7.2.  Component  Purchases.  MKE will negotiate  with various  suppliers to
establish  sources  of  supply  for the  Components  needed to  manufacture  the
Products.  Should  MKE  desire  to  change  or add  vendors  of  Components  for
particular  components following initial selection for a particular Product, MKE
shall notify Quantum thereof and shall obtain  Quantum's prior written  approval
for any change or addition of vendors for key components.

8.       TECHNICAL COOPERATION.

     The Technical  Information  exchange will be an ongoing  process during the
term of the  Agreement.  Each  party  shall  have  full  access  to the  other's
facilities and production  processes for the Products and full  cooperation will
be provided by all parties. The parties recognize,  however, that it is intended
that information  transfer shall be efficiently  accomplished and not impede the
business  of  any  party.  Quantum  agrees  to  make  available  to  MKE  design
information  (including Technical  Information)  relating to a Product, as it is
developed by Quantum,  and to compile the product  documentation  to  facilitate
transfer.  Quantum  agrees to use  reasonable  commercial  efforts to assist and
provide technical  support as reasonably  necessary to enable MKE to manufacture
the  Products.   MKE  agrees  to  retain  and  create   documentation   for  its
manufacturing  processes  for the  Products to the extent  that is possible  and
practical.  Quantum  recognizes that it may be expensive and impractical for MKE
to assemble complete information  relating to MKE's manufacturing  processes for
the  Products.  Quantum  shall have full access to all  information  relating to
MKE's manufacturing processes for the Products upon reasonable request, provided
that  Quantum  may not use the  Technical  Information  of MKE  included in such
information for any purpose except as expressly provided in this Agreement. Both
parties  recognize  that  continued  access to the Technical  Information of the
other party pursuant to this Agreement is necessary for broad business planning,
which includes  implementing product designs and changes and assisting the other
party in overcoming problems.

9.       PROPRIETARY RIGHTS.

     9.1. Right To Use.  Subject to the terms and conditions of this  Agreement,
Quantum hereby grants to MKE a worldwide,  [CONFIDENTIAL  TREATMENT  REQUESTED],
nonexclusive  and  [CONFIDENTIAL   TREATMENT   REQUESTED]  license  to  use  any
manufacturing  processes,  techniques,  Technical  Information  and  know-how of
Quantum used in the  production  of the Products,  including any  modifications,
alterations or revisions thereof for manufacture of any Product.

     9.2.  Product  Designs  and  Manufacturing  Processes.  MKE agrees that all
rights  to  the  Products  and  Product  designs,  including  modifications  and
enhancements,  shall remain proprietary to Quantum or the third party from which
it has been licensed,  regardless of the  contributions of the parties.  Quantum
agrees  that  all  rights  to  manufacturing  processes,  techniques,  Technical
Information and know-how used in the production for the Products,  including any
modifications,  alterations or revisions  thereof  regardless of contribution of
the parties but excluding any test software  programs supplied by Quantum to MKE
without charge, shall remain proprietary to MKE or the third party from which it
has been  licensed,  and that such MKE  technology  may be used by MKE 

                                       8
<PAGE>

for other purposes. Neither party shall have the right to transfer any Technical
Information of the other party  obtained  hereunder to a third party without the
prior written consent of the disclosing party.

     9.3. Patents. The parties recognize that during the term of this Agreement,
inventions and patentable  technology may be developed by Quantum and MKE within
the scope of this Agreement. If an invention or patentable technology relates to
Products or Product designs, Quantum shall have sole ownership and MKE agrees to
assign to Quantum any rights it may have to such  invention.  If an invention or
patentable  technology  relates to  manufacturing  techniques or processes,  MKE
shall have sole  ownership and Quantum agrees to assign to MKE any rights it may
have to such invention.

     9.4. Patent Protection.  The parties agree to develop and diligently pursue
a strategy for protecting the proprietary  rights developed under this Agreement
against  infringement  by third  parties,  which  shall  include  filing  patent
applications  in  countries  which  the  parties  mutually  agree.  The  cost of
obtaining all Product patents will be borne by Quantum and the cost of obtaining
all  manufacturing  and process  patents will be borne by MKE.  Each party shall
provide assistance to the other, as requested, without charge.

     9.5. Patent Rights.  If MKE desires to utilize the technology  covered by a
Product  patent owned by Quantum for the  development  of a product  outside the
scope of this  Agreement,  Quantum  and MKE agree to in good faith  discuss  the
grant of rights to MKE.

     9.6. Trademarks.  Except as set forth in the Purchase Agreement, each party
shall have the right  during the term of this  Agreement to use  trademarks  and
tradenames  of its own  selection and neither party shall have any rights to use
the trademarks of the other without the other's written consent.

     9.7.  Patent  Contributions.  The parties  acknowledge  that when one party
makes a significant contribution of demonstrated substantial commercial value to
the  operations  of the other party  pursuant to this Section 9, they will enter
into good faith discussions to determine  whether the contributing  party should
receive  compensation  for such  contribution.  It is expressly  understood that
there  is no  obligation  to  provide  any  compensation  to any  party  and the
determination  of any  compensation,  if any, shall be in the sole discretion of
the party who may wish to pay such compensation.

10.      CONFIDENTIALITY.

     10.1.  Confidentiality.  All  parties  acknowledge  that,  in the course of
performing  their  respective  obligations,  they will be receiving  information
which is  confidential  and  proprietary to the  disclosing  party and which the
disclosing  party  wishes  to  protect  from  public  disclosure.  "Confidential
Information"  means any information  which has been or will be disclosed between
the  parties  relating  to the  Technical  Information  and to their  respective
businesses, customers, products, marketing plans, financial status and the like.
The parties agree that  regardless of the date of termination of this Agreement,
each will keep  confidential any  "Confidential  Information" of the other party
for a period commencing upon receipt thereof until three (3) years following the
date of such termination and any extension hereof.

     10.2.  Restrictions.  Each party (i) agrees to use Confidential Information
only  for  the  purposes  described  in  this  Agreement,  and  not to  disclose
Confidential  Information given to it by the other party to any person,  real or
legal, except as authorized in this Agreement;  (ii) shall require a 

                                       9
<PAGE>


third party to whom disclosure of Confidential Information is authorized to sign
a confidentiality  agreement in form mutually  acceptable to the parties;  (iii)
shall exercise the same degree of care to safeguard the  confidentiality of such
Confidential  Information as it would exercise in protecting the confidentiality
of similar  property of its own; and (iv) agrees to use its diligent  efforts to
prevent inadvertent or unauthorized disclosure,  publication or dissemination of
any  Confidential   Information.   The  obligations  to  avoid   publication  or
dissemination  of  Confidential  Information  will not apply to any  information
which a party can show:

          a. is already in the possession of such party;

          b. is or becomes publicly  available  without breach of this Agreement
by such party or through ordinary marketing or sale of the Products;

          c. is  rightfully  received by such party from a third party not known
(whether  at the time of receipt or  dissemination  of such  information)  to be
under an obligation of confidence to the other party with respect thereto;

          d. is  released  for  disclosure  by the other  party with its written
consent;

          e. is disclosed  pursuant to the requirement of a governmental  agency
or  operation  of law,  provided  that such party is  obligated  to use its best
efforts to prevent  disclosure or seek confidential  treatment as requested by a
party under such circumstances; or

          f. is independently developed by such party.

11.      PATENT INDEMNIFICATION.

     Quantum will defend any action brought  against MKE based on a claim that a
Product  manufactured  by MKE and any  software/firmware  and Product  interface
supplied by Quantum infringes any trade secret,  copyright,  patent or any other
intellectual  property rights.  Quantum will indemnify and hold MKE harmless and
Quantum  agrees to defend any action  brought  against MKE and hold MKE harmless
from any and all damages, liabilities,  costs and expenses, including reasonable
attorneys' fees and cost of  investigation,  arising as a result of infringement
or a claim of  infringement  covered by this  Section.  If promptly  notified in
writing of any action or suit or threats  thereof brought against MKE based on a
claim that the Product supplied hereunder,  including any  software/firmware and
Product  interface  supplied by Quantum,  infringes  any patent,  trade  secret,
copyright,  or any other intellectual property rights, Quantum shall defend such
action or suit at its own expense,  by reputable counsel selected by Quantum and
reasonably  acceptable to MKE and shall pay any and all fees,  costs and damages
that may be awarded in such action or in settlement  thereof.  MKE shall provide
Quantum  information and assistance  reasonably required to defend and/or settle
such  action or suit or threats  thereof.  Settlement  shall be at the option of
Quantum;  provided that no settlement  shall require MKE to take or refrain from
taking any action or give or accept any property or forgive or forbear any right
of action;  and provided  further that Quantum  shall not effect any  settlement
that does not provide for the full and  unconditional  release of all applicable
claims  against MKE without  MKE's prior  written  consent.  In the event that a
charge of infringement of a patent, trade secret or copyright is made or a final
injunction  is obtained  against MKE  prohibiting  the supply of the Products to
Quantum hereunder or any part thereof,  by reason of such infringement,  Quantum
shall have the right,  after consulting with MKE and upon written notice to MKE,
to either (A) at its  expense,  procure for MKE the right to continue  supplying
the Product or replace or modify the Product,  or (B) modify the Product so that
it is  non-infringing so long as such modification does not 

                                       10
<PAGE>

affect  the  Product's  functioning,  or (C)  direct  MKE to  dispose  of  MKE's
inventory of such Product at Quantum's  expense.  In case of (B) above,  Quantum
shall be liable to MKE for, and MKE shall be entitled to recover  from  Quantum,
all of the  following  costs and expenses in the event of any such change of the
Product  design:  

          a. MKE's inventory of certain  components  and/or parts useful only in
the Product before such change of the Product design;

          b. Working and processing costs and expenses  actually incurred by MKE
prior to notice of such change of the  Product  design for the  finished  and/or
unfinished Product;

          c. Working and  processing  costs and expenses  actually  incurred for
disassembling the finished and/or  unfinished  Product in MKE's inventory at the
time of notice of such change of the Product  design,  if and to the extent such
disassembling  is required to mitigate the costs and expenses due to such change
of the Product design.

     In case of (C) above,  this Agreement  shall be terminated  with respect to
the  affected  Product.  If any  Product is so  disposed  of by MKE in line with
Quantum's discretion, MKE shall not be liable for the result thereof and Quantum
shall pay to MKE the original purchase price for such Product in addition to the
expense incurred by MKE in such disposal of the Products.

     Notwithstanding anything in this Section 11 to the contrary,  Quantum shall
have  no  liability  for  any  claim  of  patent,  trade  secret,  or  copyright
infringement,   if  the  alleged   infringement  arises  from  (A)  changes  and
modifications  to the Products by MKE other than those  provided in the Purchase
Agreement; or (B) the manufacturing process by which the Product is manufactured
unless the product design provided by Quantum requires the manufacturing process
or the  manufacturing  process  which is the subject of such claim is originated
with  Quantum  and  has  been  performed  by  MKE  in  compliance  with  Quantum
engineering drawings.

     MKE shall defend such action or suit at its expense,  by reputable  counsel
selected by MKE and  reasonably  acceptable to Quantum and shall pay any and all
fees,  costs or  damages  that may be awarded  in such  action or in  settlement
thereof,  provided  Quantum gives MKE full  information and assistance to defend
and/or settle such action or suit or threats thereof. Settlement shall be at the
option of MKE.  In the event that a charge of  infringement  of a patent,  trade
secret or copyright is made or a final  injunction is obtained  against  Quantum
prohibiting  usage of the Product  purchased  hereunder or any part thereof,  by
reason of such  infringement,  MKE shall have the right,  upon written notice to
Quantum, to either (A) at its expense, procure for Quantum the right to continue
using  the  Product  or  replace  or  modify  the  Product,  or (B)  modify  the
manufacturing  process for the Product so that it is  non-infringing  so long as
such  modification  does not affect  the  Product's  functioning,  or (C) direct
Quantum to return  such  Product to MKE at MKE's  expense.  In case of (C) above
this Agreement shall be terminated with respect to the affected Product.  If any
Product is so  returned to MKE,  MKE shall not be liable for the result  thereof
except that if MKE has been paid for the  products by Quantum,  MKE shall pay to
Quantum the original  purchase price for such Product which does not contain any
part originated with Quantum's request and involving possible  infringement upon
the patent, trade secret or copyright in question.

12.      PURCHASE AGREEMENT.

     12.1.  Purpose.  This  Agreement  is  intended  to set  forth  the  general
framework of the relationship of the parties,  including the roles and rights of
each party.  The  specific  terms of the 

                                       11
<PAGE>

business  relationship  between  MKE and Quantum  relating  to the  manufacture,
purchase  and sale of the  Products  are set  forth in a  separate  Amended  and
Restated  Purchase  Agreement  entered into by and between the parties hereto of
even date herewith, including any amendments thereof.

13.      TERM AND TERMINATION.

     13.1.  Term.  This Agreement shall be effective on the first date set forth
above and shall  continue until  December 31, 2007,  unless  earlier  terminated
pursuant to this Section 13. Upon its scheduled  expiration this Agreement shall
be renewed  automatically  for one additional term of five (5) years;  provided,
however,  that either  party may elect not to renew this  Agreement by giving no
less than  sixty  (60) days  written  notice  to the  other  party  prior to the
expiration  date of its  intention  not to renew this  Agreement.  The date upon
which the Agreement  expires in accordance with the provisions set forth in this
Section 13.1 or in  accordance  with the  provisions  of Section 13.2  ("Interim
Review Prior to Scheduled  Termination") shall be referred to as the "Expiration
Date."

     13.2.  Interim  Review  Prior to Scheduled  Termination.  At any time after
December 31, 2002,  either party may request a review of and propose  changes to
this Agreement (the "Request").  The parties shall promptly commence such review
and negotiate in good faith with respect to the proposed  changes.  If agreement
with respect to such changes is not reached  within  twelve (12) months from the
date of the Request,  either  party may upon written  notice to the other party,
delivered within thirty (30) days after the end of such twelve (12) month review
period, terminate this Agreement [CONFIDENTIAL TREATMENT REQUESTED].

     13.3. Termination. This Agreement may be terminated prior to its expiration
for the  reasons  described  below in  paragraph  (a) (an  "Event of  Default"),
paragraph  (b) (an  "Event  of  Bankruptcy")  or  paragraph  (c) (a  "Change  of
Control"). Termination shall become effective following an Event of Default or a
Change of Control only after the party  seeking to terminate  has complied  with
the notice  requirements and/or time periods set forth in paragraph (a) below or
Section  16.13,  respectively.  Termination  may  occur  following  an  Event of
Bankruptcy  upon notice from the party entitled to terminate to the other party.
In all cases, the date of notice of termination of this Agreement  (i.e.,  after
the  expiration  of any  required  time  periods)  shall be  referred  to as the
"Termination  Notice  Date."  [CONFIDENTIAL TREATMENT REQUESTED].

          a. The material default by one party on a material  obligation of such
party under this Agreement or the Purchase Agreement shall entitle the party not
in default to give the party in default  written notice  describing such default
and requiring  the party in default to remedy such  default.  If such default is
not fully  remedied  within sixty (60) days after the date of such  notice,  the
party not in default shall be entitled to terminate this Agreement immediately.

          b. Either party may terminate this Agreement at any time upon or after
the filing of an order for relief in respect of any  petition  against the other
party filed under Title 11 of the United  States Code,  or the entry of a decree
or order by a court  having  competent  jurisdiction  in respect of any petition
filed or  action  taken  against  the other  party  looking  to  reorganization,
arrangement,  composition,  readjustment,  liquidation,  dissolution  or similar
relief  under any other  present  or future  federal  or state  statute,  law or
regulation,  resulting in the appointment of a receiver,

                                       12
<PAGE>


liquidator, custodian, assignor, trustee, sequestrator or other similar official
of the other party or of any substantial  part of its property,  or resulting in
the  winding-up or liquidation  of its affairs,  in the case of any  involuntary
filing or petition,  and the continuation of any decree or order is unstayed and
in effect for a period of sixty (60)  consecutive  days;  or at any time upon or
after the filing of a petition  for relief  under Title 11 of the United  States
Code by the other party or the consent,  acquiescence or taking of any action by
the other  party in  support  of a  petition  filed by or  against it looking to
reorganization arrangement, composition, readjustment, liquidation, dissolution,
or similar  relief under any other present or future  federal or state  statute,
law or regulation,  or the appointment,  with the consent of the other party, of
any receiver,  liquidator,  custodian,  assignor, trustee, sequestrator or other
similar  official of the other party or of any substantial part of its property,
or the making by it of an assignment  for the general  benefit of all creditors,
or the admission by it in writing of its inability to pay its debts generally as
they  become  due,  or the  taking of  corporate  action  by the other  party in
furtherance of any such action.

          c. Either party may terminate  this Agreement upon the occurrence of a
change in control of the other party in accordance  with Section 16.13 ("Changes
in Control").

     13.4.    Rights Upon Termination.

          a. In the event of any termination of this Agreement under Article 13,
Articles 2, 10, 11, 14, 15 and 16, and  Sections  9.1,  9.2,  9.3 and 13.4 shall
survive.  Any  termination  of  this  Agreement  shall  only be  effective  upon
completion of the wind down phase described in the Purchase Agreement.

          b.  In  addition,  in the  event  of any  valid  termination  of  this
Agreement by MKE under Section 13.3  ("Termination") due to a material breach by
Quantum, MKE shall be entitled to such remedies as may be awarded in arbitration
pursuant to Section 14 ("Arbitration").

          c.  In  addition,  in the  event  of any  valid  termination  of  this
Agreement by Quantum under Section 13.3 due to a material breach by MKE, Quantum
shall  be  entitled  to such  rights  as set  forth  in  Section  4.3  ("Quantum
Manufacturing")  and  such  other  remedies  as may be  awarded  by  arbitration
pursuant to Section 14 ("Arbitration").

          d. This  Section sets forth the sole remedy of a party in the event of
a material breach of this Agreement by the other party.

          e. Following  termination or expiration of the Agreement,  amounts due
and owing prior to termination  or expiration of this  Agreement  shall still be
due and payable to the party owed such payment in accordance  with the terms and
conditions of this Agreement.

     14.      ARBITRATION.

     This Agreement  shall be governed in all respects by the laws of the United
States of  America  and by the laws of the State of  California,  excluding  its
conflict of law  provisions.  This  Agreement  is prepared  and  executed in the
English  language  only and any  translation  of this  Agreement  into any other
language shall have no effect. All disputes, controversy or claim arising out of
or  relating  to this  Agreement,  or the  breach,  termination,  or  invalidity
thereof, shall be settled by arbitration in Geneva,  Switzerland,  in accordance
with the  United  Nations  Commission  on  International  Trade  Law  (UNCITRAL)
Arbitration  Rules. The language of the arbitration shall be English.  The award
rendered by the arbitrator  shall include costs of the  arbitration,  reasonable
attorneys' fees and reasonable costs for experts and other  witnesses.  Judgment
on the award may be entered in any court having jurisdiction. 

                                       13
<PAGE>


The parties agree that the arbitrator  shall have the authority to issue interim
orders  for  provisional  relief,  including,  but not  limited  to,  orders for
injunctive  relief,  attachment  or other  provisional  remedy,  as necessary to
protect either party's name, proprietary information, trade secrets, know-how or
any other  proprietary  right.  The parties  agree that any interim order of the
arbitrator for any injunctive or other  preliminary  relief shall be enforceable
in any court of competent jurisdiction.  In addition, either party shall be free
to seek provisional relief from any court of competent jurisdiction, in order to
protect  that  party's  name  or  proprietary  rights,  prior  to or  after  the
arbitration procedure set forth in this Section.

     Anything in this  Agreement  to the contrary  notwithstanding,  in no event
shall the  failure  to agree  upon the prices of the  Products  and the  minimum
quantities be subject to arbitration.

15.      GOVERNMENTAL CONSENTS.

     15.1.  U.S.  Requirements.  MKE recognizes  that the transfer of technology
from Quantum is subject to compliance  with United  States export laws.  Quantum
agrees to use its best  efforts to promptly  obtain  necessary  consents for the
export of technology under this Agreement.

     15.2.  Japan   Requirements.   Quantum  recognizes  that  approval  of  the
government of Japan may be required prior to this Agreement becoming  effective.
MKE agrees to use its best efforts to promptly obtain such necessary approval.

     15.3.  Visas.  During the term of this  Agreement,  both  parties  agree to
assist the other to obtain visas necessary to permit the exchange of personnel.

     15.4.  Compliance  with Laws.  All  parties  agree  during the term of this
Agreement  to comply  with all  applicable  laws of any  country  or  government
authority  including,  but not limited to Foreign  Exchange  and  Foreign  Trade
Control Act and Export Trade Control Order of Japan and administrative  guidance
prohibiting  use of products or technology  for design or manufacture of nuclear
weapons,   chemical  weapons,   biological   weapons  or  missiles,   or  Export
Administration  Act and Regulations of the United States.  The parties recognize
and agree that products and technology  delivered or transferred  from one party
to the other party may be subject to restrictions on export or reexport  imposed
by the United  States  Department  of Commerce or the Ministry of  International
Trade and Industry of Japan.

16.      MISCELLANEOUS.

     16.1. Nonassignability. Except as specifically permitted by this Agreement,
neither  party  may  assign,  transfer  or  sublicense  any  of  the  rights  or
obligations arising under this Agreement  (including any affiliate or subsidiary
of a party) other than to a successor to its entire business by reason of merger
or sale of assets provided that the other party first receives written notice of
any such  proposed  merger  or sale of  assets  and the  intended  successor  in
interest of such proposed merger or sale of assets pursuant to such  transaction
acknowledges  in  writing  to be  bound  by the  terms  and  conditions  of this
Agreement,  without  the  prior  written  consent  of the other  party,  and any
attempted assignment without such consent shall be void and without effect.

     16.2.  Failure to Enforce.  The  failure of either  party to enforce at any
time or for any period of time the  provisions  of this  Agreement  shall not be
construed  to be a waiver of such  provisions  or of the right of such  party to
enforce each and every such provision.

                                       14

<PAGE>

     16.3.  Governing Law. This Agreement  shall be governed by and construed in
accordance  with the laws of the State of California,  United States of America,
excluding its conflict of law provisions.

     16.4.  Severability.  In the  event  that  any of the  provisions  of  this
Agreement  shall be held by a court or other tribunal of competent  jurisdiction
to be  unenforceable,  the remaining  portions of this Agreement shall remain in
full force and effect.

     16.5.  Notices.  Any notice which any party desires or is obligated to give
to the other shall be given in writing and sent to the appropriate address shown
below or to such other  address as the party to receive the notice may have last
designated in writing in the manner herein provided.  Unless otherwise provided,
any notice  required or permitted under this Agreement shall be given in writing
and shall be deemed effective (i) if personally delivered, at the time delivered
by hand,  (ii) if delivered  by facsimile  transmission,  upon  confirmation  of
transmission,  (iii) if by courier,  on the business day such courier guarantees
delivery,  and (iv) if delivered  by U.S.  Mail,  seven (7) business  days after
deposit in the U.S. mail, postage prepaid, all properly addressed as follows:

                          Quantum Corporation
                          500 McCarthy Boulevard
                          Milpitas, CA 95035
                          Attention: Chief Executive Officer
                          facsimile: (408) 232-6798

                          Matsushita-Kotobuki Electronics
                          Industries, Ltd.
                          8-1 Furujin-Machi
                          Takamatsu-City, Kagawa 760, Japan
                          Attention: Takashi Honjo, President
                          facsimile: 011-81-(878) 511047


                          Quantum Peripherals (Europe) SA
                          Champs-Montants 16a
                          CH-2074 Marin-Epagnier
                          Neuchatel, Switzerland
                          Attention: Chief Executive Officer
                          facsimile: 011-41-32-753-5541

                          Ireland Kotobuki Electronics, Ltd.
                          Finnabair Industrial Park, Coe's Road
                          Dundalk, Co Louth
                          The Republic of Ireland
                          Attention: Managing Director

                          Kotobuki Electronics Industries (s) Pte. Ltd.
                          2 Corporation Road #02-01/12, #04-01/12
                          Corporation Place
                          Singapore  618494


                                       15
<PAGE>

     16.6. Entire  Agreement.  Except for the Purchase  Agreement,  an Inventory
Storage  Agreement  between the parties  effective  December 8, 1993,  a Revised
Hydrodynamic Spindle Motor Proprietary Right and Manufacturing Agreement between
the parties effective February 3, 1995, and a Limited Voice Messaging/Processing
Industry Sales Agreement between the parties effective July 28, 1993, as well as
any agreements  between the parties regarding the establishment and operation of
TA Diamond LLC (which may in future be known as Quantum-MKE Components LLC), and
the supply of products  manufactured  by such  entity,  this  Agreement  and any
attachments or exhibits hereto constitute the entire agreement among the parties
pertaining to the subject matter  hereof,  and any and all other written or oral
agreements   existing   between  the  parties  are   expressly   canceled.   Any
modifications of this Agreement must be in writing and signed by duly authorized
officers of all parties.

     16.7. Force Majeure. In the event of any delay in performance or failure of
performance  of  obligations  under this  Agreement  by either  party due to any
causes  arising  from  acts of  God,  war,  mobilization,  riot,  strike,  fire,
earthquake,  flood, embargo,  delay of carrier, power failure or attributable to
acts, events or omissions beyond the reasonable  control of the party concerned,
such delay or failure of performance shall not be deemed a default and the party
so delayed or prevented  shall be under no liability for loss or injury suffered
by the other party.  Nothing in this paragraph  shall affect the right of either
party to terminate this Agreement as otherwise provided herein.

     16.8. Limitation of Liability. IN NO EVENT AND UNDER NO CIRCUMSTANCES SHALL
ANY PARTY  UNDER  THIS  AGREEMENT  BE LIABLE FOR ANY  SPECIAL  OR  CONSEQUENTIAL
DAMAGES OR LOSS OF PROFITS  OF THE OTHER  PARTY OR PARTIES OR ANY  EXPENDITURES,
COSTS OR  INVESTMENTS  MADE OR INSURED BY THE OTHER PARTY OR PARTIES AS PROVIDED
HEREIN.

     16.9. MEI. Quantum  acknowledges that MKE is a subsidiary of MEI which is a
manufacturer of products which may be competitive with the Products and that MEI
and its subsidiaries  other than MKE may now have or will have under development
products which are competitive with the Products.

     16.10.  Binding.  This Agreement is not binding upon MEI, its subsidiaries,
and their  respective  affiliates  other than MKE and  nothing  herein  shall be
construed as a limitation upon the rights of MEI and its subsidiaries other than
MKE to sell any  products  to any  customers  or  potential  customers  therefor
anywhere  in the  world,  but  nothing  herein  contained  shall  authorize  the
disclosure of Quantum's Technical  Information to MEI and its subsidiaries other
than MKE.  Also,  this  Agreement  does not apply to the design,  manufacture or
supply to or from TA Diamond  LLC,  of Products or  Components  to either  party
hereunder,  which are addressed by separate  agreement  among the parties hereto
and TA Diamond LLC.

     16.11.  Agency.  This  Agreement  does not  create a  principal  to  agent,
employer to  employee  partnership,  joint  venture,  or any other  relationship
except that of independent contractors between Quantum and MKE.

     16.12. Headings.  Headings to Paragraphs and Sections of this Agreement are
to facilitate  reference only, do not form a part of this  Agreement,  and shall
not in any way affect the interpretation hereof.

     16.13.  Changes in Control.  Prior to the occurrence of a change of control
of either  Quantum or MKE,  i.e.,  a person or entity  acquires  more than fifty
percent (50%) of the voting  control of either  


                                       16

<PAGE>


Quantum or MKE,  the party  likely to undergo such change of control will notify
the other party and the parties  will discuss the likely  effect.  [CONFIDENTIAL
TREATMENT REQUESTED].

     16.14.  Bankruptcy  Code. All rights and licenses granted under or pursuant
to this  Agreement by one party to the other with respect to the Products or the
Technical  Products of the  Technical  Information  are, and shall  otherwise be
deemed to be, for the purposes of Section 365(n) of the United States Bankruptcy
Code, 11 U.S.C. Section 101, et seq. (the "Bankruptcy Code"), licenses of rights
to  "intellectual  property" as defined under Section  101(56) of the Bankruptcy
Code;  provided it abides by the terms of this  Agreement.  The parties  further
agree that, in the event that any proceeding shall be instituted by or against a
party  seeking to  adjudicate  it bankrupt or insolvent or seeking  liquidation,
winding  up,  reorganization,  arrangement,  adjustment,  protection,  relief or
composition  of it or  its  debts  under  any  law  relating  to  bankruptcy  of
insolvency  or  reorganization  or relief of debtors,  or seeking an entry or an
order for relief of  debtors,  or seeking an entry or an order for relief or the
appointment  of a  receiver,  trustee or other  similar  official  for it or any
substantial  part of its  property,  or such  party  shall  take any  action  to
authorize any of the foregoing  actions (each a  "Proceeding"),  the other party
shall  have the right to retain and  enforce  its  rights  under this  Agreement
including,  but not limited to the following  rights,  provided it abides by the
terms  of this  Agreement:  (i)  the  right  to  continue  to use the  Technical
Information,  all documentation  and other supporting  materials relater thereto
and manufacture and sell Products and all versions and derivatives  thereof; and
(ii) the right to complete access to, as appropriate,  all Technical Information
and Products and all  embodiments of such to be provided  under this  Agreement,
including   documentation  therefor,  and  the  same,  if  not  already  in  the
non-bankrupt party's possession,  shall be promptly delivered to such party: (a)
upon any such commencement of a Proceeding upon written request therefor by such
party,  unless the  bankrupt  party  elects to  continue  to perform  all of its
obligations  under his Agreement;  or (b) if not delivered under (a) above, upon
the  rejection  of this  Agreement  by or on behalf of the  bankrupt  party upon
written request therefor by the non-bankrupt party.

                                       17

<PAGE>




       IN WITNESS  WHEREOF,  the parties hereto here caused this Agreement to be
duly  executed by their  respective  authorized  officers as of the day and year
first above written. Notwithstanding such execution, this Agreement shall become
effective only after obtaining required approval of the government of Japan.

                                          QUANTUM CORPORATION


                                          By: /s/ Michael Brown
                                              ----------------------------------
                                              Name: Michael Brown
                                              Title: President and CEO

                                          QUANTUM PERIPHERALS
                                          (EUROPE) SA


                                          By: /s/ Andrew Kryder
                                              ----------------------------------
                                              Name: Andrew Kryder
                                              Title:

                                          MATSUSHITA-KOTOBUKI
                                          ELECTRONICS INDUSTRIES, LTD.


                                          By: /s/ Takashi Hanjo
                                              ----------------------------------
                                              Name: Takashi Hanjo
                                              Title: President

                                          IRELAND KOTOBUKI
                                          ELECTRONICS INDUSTRIES, LTD.


                                          By: /s/ Yoshiyuiri Aono
                                              ----------------------------------
                                              Name: Yoshiyuiri Aono
                                              Title: Managing Director

                                          KOTOBUKI ELECTRONICS
                                          INDUSTRIES (S) PTE. LTD.

                                          By: /s/ Hironijo Sakioka
                                              ----------------------------------
                                              Name: Hironijo Sakioka
                                              Title: Managing Director

                      AMENDED AND RESTATED MASTER AGREEMENT

                                       18




                              AMENDED AND RESTATED

                               PURCHASE AGREEMENT

                                     BETWEEN

                MATSUSHITA-KOTOBUKI ELECTRONICS INDUSTRIES, LTD.,

                                       AND

                               QUANTUM CORPORATION



<PAGE>

<TABLE>

                                                        TABLE OF CONTENTS

<CAPTION>
                                                                                                                     Page
                                                                                                                     ----
<S>                                                                                                                   <C>
1. DEFINITIONS.........................................................................................................1
   1.1. Confidential Information.......................................................................................1
   1.2. DPSG Products..................................................................................................1
   1.3. Engineering Change.............................................................................................1
   1.4. Master Agreement...............................................................................................1
   1.5. Products.......................................................................................................1
   1.6. Product Specifications.........................................................................................1
   1.7. Purchase Order.................................................................................................1
   1.8. Quantum........................................................................................................2
   1.9. Spare Parts....................................................................................................2
   1.10. Technical Information.........................................................................................2
   1.11. Unique Customer Configured Products...........................................................................2
   1.12. WSSG Products.................................................................................................2
2. CONTROLLING DOCUMENT................................................................................................2
   2.1. Controlling Agreement..........................................................................................2
   2.2. Conflicts......................................................................................................2
3. PURCHASE ORDERS.....................................................................................................2
   3.1. Orders.........................................................................................................2
   3.2. European Purchase Orders.......................................................................................3
   3.3. Confirmation...................................................................................................3
   3.4. Contents.......................................................................................................3
   3.5. Emergency Orders...............................................................................................3
   3.6. Shipment Report................................................................................................3
4. FORECASTS/COMMITMENTS...............................................................................................3
   4.1. Purchase Orders................................................................................................3
   [CONFIDENTIAL TREATMENT REQUESTED]
   4.3. European Purchase Commitment...................................................................................4
   4.4. Discontinuance of Model........................................................................................4
5. PRICES..............................................................................................................4
   5.1. Price..........................................................................................................4
   5.2. Special Pricing................................................................................................4
6. CURRENCY............................................................................................................4
7. TAXES...............................................................................................................4
8. PURCHASE ORDER RESCHEDULES AND FORECAST ADJUSTMENTS.................................................................4
9. PAYMENT TERMS.......................................................................................................5
10. TITLE..............................................................................................................5
11. DELIVERY...........................................................................................................6
   11.1. Transportation................................................................................................6
   11.2. Packaging.....................................................................................................6
   11.3. Delivery Times................................................................................................6
12. INSPECTION AND ACCEPTANCE..........................................................................................6
   12.1. MKE Inspection................................................................................................6
   12.2. Quantum Inspection............................................................................................6

                                                               i
<PAGE>


                                                        TABLE OF CONTENTS
                                                            (continued)
                                                                                                                     Page
                                                                                                                     ----
   12.3. Quantum Corrections...........................................................................................7
   12.4. Non-conforming Acceptance.....................................................................................7
   12.5. Lot Failures..................................................................................................7
   12.6. Ongoing Reliability Testing...................................................................................7
   12.7. OEM Customer Inspection.......................................................................................8
13. WARRANTY, PATENT INDEMNIFICATION...................................................................................8
   13.1. MKE Warranty..................................................................................................8
   13.2. Quantum Warranty..............................................................................................8
   13.3. Remedy........................................................................................................8
   13.4. Warranty Costs................................................................................................8
   13.5. Exclusive Remedy..............................................................................................9
   13.6. Warranty and Service by MKE for Sales by MKE to MKE Customers.................................................9
   13.7. Patent Indemnification........................................................................................9
14. ENGINEERING CHANGES................................................................................................9
   14.1. MKE Changes...................................................................................................9
   14.2. Quantum Changes...............................................................................................9
15. SPARE PARTS.......................................................................................................10
   15.1. Spare Parts During Product Manufacture.......................................................................10
   15.2. Prices of Spare Parts During Product Manufacture.............................................................10
   15.3. Spare Parts After Termination of Product Manufacturing.......................................................10
   15.4. Prices for Spare Parts After Termination of Product Manufacturing............................................10
16. DOCUMENTATION.....................................................................................................10
   16.1. Quantum's Brands.............................................................................................10
17. Components........................................................................................................11
18. TERM AND TERMINATION..............................................................................................11
   18.1. Term.........................................................................................................11
   [CONFIDENTIAL TREATMENT REQUESTED]
   18.3. Rights Upon Termination......................................................................................12
19. ARBITRATION.......................................................................................................13
20. GOVERNMENTAL CONSENTS.............................................................................................13
   20.1. Compliance with Laws.........................................................................................13
21. MISCELLANEOUS.....................................................................................................14
   21.1. Nonassignability.............................................................................................14
   21.2. Failure to Enforce...........................................................................................14
   21.3. Governing Law................................................................................................14
   21.4. Severability.................................................................................................14
   21.5. Notices......................................................................................................14
   21.6. Entire Agreement.............................................................................................15
   21.7. Force Majeure................................................................................................15
   21.8. Limitation of Liability......................................................................................15
   21.9. Binding......................................................................................................15
   21.10. Agency......................................................................................................16
   21.11. Headings....................................................................................................16

                                                               ii
<PAGE>


                                                        TABLE OF CONTENTS
                                                            (continued)
                                                                                                                     Page
                                                                                                                     ----


   21.12. Trading Company.............................................................................................16

</TABLE>

                                                               iii
<PAGE>





                 AMENDED AND RESTATED PURCHASE AGREEMENT BETWEEN
                MATSUSHITA-KOTOBUKI ELECTRONICS INDUSTRIES, LTD.,
                             AND QUANTUM CORPORATION

THIS   AMENDED  AND   RESTATED   PURCHASE   AGREEMENT   is  made  by  and  among
MATSUSHITA-KOTOBUKI  ELECTRONICS INDUSTRIES,  LTD., a Japanese corporation,  its
subsidiaries,   IRELAND  KOTOBUKI   ELECTRONICS   INDUSTRIES,   LTD.,  an  Irish
corporation,  and KOTOBUKI  ELECTRONICS  INDUSTRIES  (S) PTE.  LTD., a Singapore
corporation   (collectively,   "MKE")  and  QUANTUM   CORPORATION,   a  Delaware
corporation,  and  its  subsidiary  QUANTUM  PERIPHERALS  (EUROPE)  SA,  a Swiss
corporation (hereinafter collectively "Quantum"). This Agreement is entered into
as of the 30th day of April,  1997 (the "Effective  Date") and is intended to be
an amendment and restatement of the Purchase Agreement between the parties dated
as of December 1987, as amended.

In  consideration  of the mutual  covenants and promises in this Agreement,  the
parties agree as follows:

1.       DEFINITIONS.

The  following  terms,  as used in  this  Agreement,  shall  have  the  meanings
referenced below:

     1.1.  "Confidential  Information"  shall have the  meaning set forth in the
Master Agreement.

     1.2. "DPSG Products" shall mean Products  designed by Quantum primarily for
the storage needs of desktop and portable  systems,  including by way of example
but not limitation, personal computers for home and business use.

     1.3.  "Engineering  Change"  regarding  design shall mean any electrical or
mechanical  changes to the Products or Spare Parts,  proposed by Quantum or MKE,
which  would  affect  the  performance,   reliability,  safety,  serviceability,
appearance,  dimensions, tolerances, final assembly or Product Specifications of
the Products.  Regarding manufacturing process,  "Engineering Change" shall mean
any change to the manufacturing  process,  proposed by Quantum or MKE, which may
affect form, fit, function, quality, and/or reliability of the Products.

     1.4.  "Master  Agreement"  means the Amended and Restated Master  Agreement
between MKE and Quantum dated as of even date herewith.

     1.5.  "Products" [CONFIDENTIAL TREATMENT REQUESTED].

     1.6.  "Product  Specifications"  shall  mean  the  specifications  for  the
Products mutually agreed by the parties from time to time in accordance with the
procedures of the parties in effect on the Effective Date.

     1.7.  "Purchase  Order" shall mean  purchase  orders  submitted to MKE from
Quantum   in   accordance   with   Sections   3   ("Purchase   Orders")   and  4
("Forecasts/Commitments") of this Agreement.

                                       1.
<PAGE>


     1.8.   "Quantum"   shall  also  include  any   subsidiary  of  Quantum  not
specifically referenced above.

     1.9. "Spare Parts" shall mean all spare parts for the Products.

     1.10.  "Technical  Information"  shall mean all non-public  information and
know-how which is  proprietary  to Quantum or MKE, as the case may be,  directly
related to the  development  and  manufacturing  of any Products,  including all
inventions,  processes  and  discoveries  known,  actively  used,  or  hereafter
developed  by  either  party  with  respect  thereto  during  the  term  of this
Agreement. Technical Information shall be mutually exchanged between the parties
solely for the  purpose of  contributing  to, or  assisting  with,  the  design,
manufacturing,  marketing,  testing and service of the  Products,  provided that
either party has the right to transfer such  information  without the consent of
or payment  of  royalties  to a third  party,  and  further  provided  that such
Technical  Information  as will be transferred by MKE to Quantum may not be used
for Quantum's  manufacturing  of any product,  including  the Products,  without
MKE's prior written consent.  Notwithstanding anything to the contrary contained
herein,  no  exchange  of  Technical  Information  shall be deemed to  transfer,
license or  otherwise  assign from one party to the other party any  proprietary
rights any party hereto may have in the Technical Information.

     1.11. "Unique Customer Configured  Products" shall mean Products based upon
standard  Products  but  incorporating  changes  that  may  include  electrical,
hardware  interface,  firmware  and/or form factor made pursuant to the terms of
this Agreement.  The  specifications of such products will be mutually confirmed
in writing on an as-needed basis.

     1.12. "WSSG Products" shall mean Products designed by Quantum primarily for
the storage needs of storage-intensive applications, including by way of example
but not limitation,  servers,  workstations,  disk arrays,  networked databases,
storage subsystems and mini-computers.

2.       CONTROLLING DOCUMENT.

     2.1. Controlling  Agreement.  All purchases of the Products by Quantum from
MKE shall be subject to the terms and conditions of this  Agreement,  the Master
Agreement  and  the  Exhibits,   if  any,  attached  to  each.  Any  additional,
inconsistent and conflicting clauses in any Purchase Order, release,  acceptance
or  other  written  correspondences  from  one  party  to the  other,  are to be
considered  rejected  and of no  effect.  Any  addition  to,  deletion  from  or
modification of any of the provisions of this Agreement shall be made in writing
signed by duly authorized  representatives  of both parties and shall state that
it is an amendment of this Agreement.

     2.2.  Conflicts.  If a  conflict  arises  between  any of the  terms in the
following documents, the order of precedence shall be: (i) this Agreement,  (ii)
the  Master  Agreement,  and (iii)  written  terms on any  issued  and  accepted
Purchase Order.

3.       PURCHASE ORDERS.

     3.1.  Orders.  The  purchase  and sale of Products and Spare Parts shall be
made against  specific  Purchase Orders placed by Quantum to MKE and accepted by
MKE during the term of this Agreement in accordance with the provisions  hereof,
provided that such acceptance  shall not be unreasonably  withheld or delayed in
accordance with the provisions hereof.  Purchase Orders and change orders may be
placed by facsimile.  A Purchase  Order may provide for delivery of the Products
for a period up to one hundred eighty (180) days following normal  expiration of
this  Agreement  and all terms and  conditions of this  Agreement  shall govern.
Subject to the provisions of 

                                       2.

<PAGE>

Section 18.2  ("Termination"),  no Purchase  Order is required to be accepted by
MKE on and  after the  expiration  or the  termination  of this  Agreement.  Any
Purchaser Order issued, or to be issued,  for any firm commitment of purchase of
Products  hereunder shall be noncancellable  except as otherwise provided for in
Sections 11.3 ("Delivery  Times") and 21.7 ("Force  Majeure") hereof and Quantum
shall be  responsible  for taking  deliveries of and paying for all Products set
forth in such Purchase Order.

     3.2. European Purchase Orders. All purchase orders from Quantum Peripherals
(Europe) SA  ("Quantum-Switzerland") to Ireland Kotobuki Electronics Industries,
Ltd. ("MKE-Ireland") shall be issued to MKE and the copy of such purchase orders
shall be delivered to MKE-Ireland  simultaneously with such issuance. Control of
order acceptance and production allocation shall be made by MKE.

     3.3.  Confirmation.  MKE will notify Quantum of receipt of a Purchase Order
within  five (5)  working  days  after  receipt  of  Quantum's  Purchase  Order.
Confirmation of receipt and acceptance by MKE may be by facsimile. No individual
Purchase Order shall be binding upon MKE unless and until accepted in writing by
MKE, but such acceptance shall not be unreasonably withheld or delayed.

     3.4.  Contents.  All Purchase Orders for Products and Spare Parts submitted
by Quantum shall state the following:  (i) price,  (ii) the quantities  ordered,
(iii)  delivery  dates,  (iv)  destination  (which shall be the mutually  agreed
Quantum  facility  unless  otherwise  specifically  agreed by the parties),  (v)
requested  method of shipment (and specific carrier if desired) and (vi) Product
model or Spare Parts number in accordance with the terms and conditions  hereof.
Quantum  shall use the form of Purchase  Order  agreed upon by the parties  from
time to time to place the Purchase  Order and  emergency  orders  referred to in
Section 3.5  ("Emergency  Orders") below.  Any additional or inconsistent  terms
contained on such form of Purchase  Order shall not be applicable and are hereby
rejected.

     3.5.  Emergency  Orders.  The monthly rolling forecasts and Purchase Orders
placed by Quantum under Sections 3.1 ("Orders")  and 4.2  ("Commitments")  shall
not prevent Quantum from placing  emergency  orders for Products for delivery up
to the  quantities as may be agreed to by MKE in accordance  with the provisions
hereof in less than ninety (90) days and MKE agrees to make  reasonable  efforts
to deliver the  Products on the  requested  schedule but shall have no liability
hereunder  for  failure  to  deliver  such  emergency  orders  on the  requested
schedule.

     3.6. Shipment Report.  MKE will supply Quantum a weekly shipment report for
all  Products  shipped  during the past week,  which  report  shall  specify the
quantity, part number (including revision or configuration level), shipment date
and  commercial  invoice  number with the form and method to be mutually  agreed
upon between the parties.

4.       FORECASTS/COMMITMENTS.

     4.1. Purchase Orders. Quantum will issue a non-cancelable Purchase Order on
a  monthly  basis,  on or  before  the  10th  day of such  month,  [CONFIDENTIAL
TREATMENT REQUESTED].

     4.2. [CONFIDENTIAL TREATMENT REQUESTED]

                                       3.
<PAGE>

[CONFIDENTIAL TREATMENT REQUESTED]

     4.3.  European  Purchase  Commitment.  Quantum warrants and guarantees that
Quantum or Quantum's  subsidiaries will utilize  MKE-Ireland's  product first in
meeting European  demand;  provided that Quantum and MKE shall mutually agree as
to the timing of any increases in MKE- Ireland's  production  capacity.  Quantum
agrees to use  diligent  efforts to market,  sell and promote the  Products  and
Unique Customer Configured Products in Europe through Quantum-Switzerland.

     4.4.  Discontinuance  of  Model.  Quantum  shall  promptly  notify  MKE  of
Quantum's  decision  to  discontinue  to order any  specific  model of  Product.
Notwithstanding any such notice,  Quantum shall remain obligated to purchase the
specific model of Product  pursuant to the application of Section 3.1 ("Orders")
and Section 8 ("Purchase Order Reschedules and Forecast Adjustments").

5.       PRICES.

     5.1.  Price.  The  purchase  price to Quantum for each item of the Products
sold to Quantum shall be agreed to from time to time by the parties.

     5.2. Special Pricing.

          a. In order to  obtain  business  from  specific  potential  customers
identified  by Quantum and deemed to be in the mutual best  interests of Quantum
and MKE,  Quantum  and MKE shall in good  faith work  together  to  establish  a
mutually  agreeable  price for the Products  between MKE and Quantum  where such
special  pricing may be  necessary  in order for Quantum to obtain the  business
from such customers.

         b. All  prices  to  Quantum  for  Products,  Unique  Custom  Configured
Products  and/or  Spare  Parts,  where MKE's  trading  company  provides  export
services  from  Japan,  shall be  F.O.B.  Japanese  Port  (Osaka,  Kobi or their
vicinity) as designated by Quantum [CONFIDENTIAL TREATMENT REQUESTED] the Ex-MKE
factory price for such Products,  Unique Custom Configured Products and/or Spare
Parts as set forth in Section 5.1 ("Price") above.

6.       CURRENCY.

         MKE sales of  Products  and  Spare  Parts to  Quantum  shall be in U.S.
Dollars.

7.       TAXES.

         The price for the Products  includes all taxes  necessary to pass title
to the Products,  Unique Customer Configured Products and Spare Parts to Quantum
at the delivery point. In the case of substantially high rate taxes,  charges or
duties such as 100% sanctions,  Quantum and MKE agree to meet immediately and to
agree upon a method to  resolve  such  problem.  Title to the  Products,  Unique
Customer  Configured  Products  and Spare Parts  shall pass to Quantum  from MKE
ex-MKE Factory unless MKE's Trading Company provides export  services,  in which
event title shall pass to Quantum  F.O.B.  Japanese  Port (Osaka,  Kobe or their
vicinity) as designated by Quantum.

8.       PURCHASE ORDER RESCHEDULES AND FORECAST ADJUSTMENTS.

          [CONFIDENTIAL TREATMENT REQUESTED] 

                                       4.

<PAGE>

<TABLE>
<CAPTION>
<S>     <C>   

                       [CONFIDENTIAL TREATMENT REQUESTED]
</TABLE>

         It is expected  that a significant  portion of Quantum's  business will
require  special  configuration  of the  Products.  Some may be as minor as code
changes while others may require  special  brackets or other  hardware  changes.
Quantum's  customers  also will  change the mix of Products in addition to their
configuration with virtually no lead time.  Therefore,  Quantum shall be able to
change the configuration and mix of products on a weekly basis.  Quantum and MKE
will work together to establish a mutually agreeable  procedure for changing the
configuration and mix of Products and Unique Customer Configured Products.

9.       PAYMENT TERMS.

         Unless otherwise specifically provided herein, all payments,  including
without  limitation  payments  for  the  Products,  Unique  Customer  Configured
Products  and Spare  Parts  made by Quantum  hereunder  shall be payable in U.S.
Dollars, [CONFIDENTIAL TREATMENT REQUESTED], in case of Products manufactured in
Japan and [CONFIDENTIAL  TREATMENT REQUESTED],  in case of Products manufactured
in Ireland  or  Singapore,  after  delivery  of the  Products,  Unique  Customer
Configured Products or Spare Parts to Quantum.  Delivery of the Products, Unique
Customer  Configured  Products or Spare Parts shall be deemed to occur when such
Products,  Unique  Customer  Configured  Products or Spare  Parts are  delivered
ex-MKE Factory unless MKE's  designated  Trading Company provides export service
to Quantum,  in which event delivery shall be deemed to occur when the Products,
Unique  Customer  Configured  Products  and/or Spare Parts are delivered  F.O.B.
Japanese Port (Osaka, Kobe or their vicinity) as designated by Quantum.

         [CONFIDENTIAL TREATMENT REQUESTED]

10.      TITLE.

         Title to the Products, Unique Customer Configured Products and/or Spare
Parts and risk of loss shall pass to Quantum  upon MKE's  delivery  thereof,  as
delivery  is defined in Section 9  ("Payment  Terms")  above  regardless  of any
provisions for payment of freight or insurance or form of shipping documents.

                                       5.

<PAGE>

11.      DELIVERY.

     11.1. Transportation. The method of transportation and the carrier selected
shall be as  specified  by Quantum in its  Purchase  Order.  All  transportation
charges, including insurance, shall be paid by Quantum.

     11.2.  Packaging.  The  method of  packaging  shall be in  accordance  with
specifications  established  by Quantum from time to time. The cost of packaging
for shipment to the United States is included in the price.  Each shipment shall
include a packing list  containing:  (i) Purchase  Order  number,  (ii) Product,
Unique Customer  Configured Products or Spare Part number, and (iii) quantity of
shipped Products,  Unique Customer  Configured  Products or Spare Parts.  Serial
numbers of Products shipped to Quantum shall be delivered  concurrently with the
packing  list but by separate  communications  in  accordance  with the parties'
standard  practices.  Quantum  shall  indemnify  and hold  harmless MKE from and
against any and all liabilities,  cost, expenses, loss and damages,  arising out
of or relating to the packaging for the Products  provided that the Products and
Spare Parts are packed in conformity with Quantum's specifications.

     11.3.  Delivery  Times.  The  delivery  dates and  quantities  specified by
Quantum in its Purchase  Orders  accepted by MKE are firm.  If a delivery  date,
along  with the  appropriate  quantities,  is missed by more than five (5) days,
then Quantum may reschedule the delivery in question.

12.      INSPECTION AND ACCEPTANCE.

     12.1.  MKE  Inspection.  MKE  shall  provide  and  maintain  an  inspection
procedure and quality  assurance  program for Products and Spare Parts and their
production  processes.  Complete  records  of all  inspection  work  done by MKE
including  equipment  calibration,  shall be made  available to Quantum upon its
request  and  reasonable  times  during the term of this  Agreement.  Quantum is
authorized to perform source  inspection and quality  assurance  audits at MKE's
manufacturing  facilities,  but this shall not relieve MKE of its  obligation to
deliver  conforming   Products  or  waive  Quantum's  right  of  inspection  and
acceptance at destination.

     12.2. Quantum Inspection. All Products, Unique Customer Configured Products
and Spare  Parts  ordered by Quantum  under this  Agreement  shall be subject to
inspection  and  acceptance by Quantum at its  destination  in  accordance  with
incoming  inspection  test  procedures  agreed to by MKE. All  Products,  Unique
Customer Configured Products and Spare Parts shipped,  under this Agreement will
comply one  hundred  percent  (100%) to the  Product  Specifications.  Products,
Unique Customer Configured Products and Spare Parts which fail to pass Quantum's
incoming  test or inspection  requirements  for the  Products,  Unique  Customer
Configured  Products and Spare Parts which have been  established  by the mutual
agreement  of Quantum and MKE may be rejected by Quantum and returned to MKE for
repair or replacement, with all costs to repair or replace and of transportation
(with  MKE  choosing  the  carrier)  and risk of loss from  Quantum's  principal
facility, to be paid as provided below.

          a. During the Agreement term, and by mutual agreement  between Quantum
and MKE, MKE shall provide at MKE's expense,  at Quantum's  facility,  technical
personnel for purpose of analyzing  manufacturing  defects found during incoming
acceptance tests.

          b. In the event that MKE's technical  personnel at Quantum's  facility
cannot  correct  defects  relating  solely  to  manufacturing  defects  within a
reasonable number of working days following MKE's receipt of Quantum's notice of
defects,  the non-conforming  Products,  Unique 

                                       6.

<PAGE>

Customer  Configured  Products and Spare Parts may be returned to MKE for repair
or  replacement.  Quantum  shall  notify  MKE prior to  return of  nonconforming
Products,  Unique  Customer  Configured  Products or Spare  Parts.  All returned
Products,  Unique Customer Configured Products or Spare Parts will be shipped to
MKE's designated facility.

          c.  All  shipments  of   non-conforming   Products,   Unique  Customer
Configured  Products or Spare Parts  pursuant to (b) above shall be made freight
collect  and MKE assumes  risk of loss and damage  during  transit.  Replacement
Products,  Unique Customer  Configured Products or Spare Parts will be delivered
to Quantum,  at Quantum's  applicable  facility,  at MKE's expense within thirty
(30) days after the date of receipt of non-conforming Products,  Unique Customer
Configured  Products or Spare Parts by MKE. Should MKE fail to repair or replace
rejected Products, Unique Customer Configured Products or Spare Parts and return
conforming  Products,  Unique  Customer  Configured  Products  or Spare Parts to
Quantum within thirty (30) days, Quantum shall have the option to cancel without
cost or liability  the purchase of such  Products,  Unique  Customer  Configured
Products or Spare Parts and receive,  at Quantum's option, a credit or rebate if
payment has been made.  Quantum shall pay freight  charges,  insurance and other
customary charges for  transportation for improperly  rejected Products,  Unique
Customer  Configured  Products or Spare Parts.  Notwithstanding  the  foregoing,
Quantum  and MKE  shall  separately  negotiate  in good  faith if  either  party
believes that different  procedures for repair and  replacement of WSSG Products
or other new Products  should be established  because of the differences in such
Products.

          d. It is  understood  that  all  costs to  repair  or  replace  and of
transportation  with respect to defective  Products,  Unique Customer Configured
Products or Spare Parts shall be [CONFIDENTIAL TREATMENT REQUESTED].

     12.3. Quantum Corrections. Quantum may attempt to correct deficiencies with
Spare Parts  purchased  under this  Agreement.  Such correction by Quantum shall
neither invalidate nor act as a waiver of Quantum's rights to satisfaction under
Section  12.2  ("Quantum  Inspection")  above nor affect any other terms of this
Agreement,  including,  but not  limited  to,  the  warranty  under  Section  13
("Warranty"). The act of payment for Products or Spare Parts shall not of itself
signify acceptance by Quantum of the Products or Spare Parts.

     12.4.  Non-conforming  Acceptance.  Quantum may choose to accept  Products,
Unique  Customer  Configured  Products or Spare Parts which fail to conform in a
minor  aspect  to the  specifications  established  by  this  Agreement  without
prejudice to its right to reject  non-conforming items in the future. If Quantum
so  chooses,  Quantum  will  notify MKE of its  intent to accept  non-conforming
items.  MKE agrees to negotiate in good faith a price  reduction  for such items
based upon Quantum's added expenses to correct such  deficiencies  provided that
the basis for  non-conformance  is not the result of a design defect.  After the
parties  agree on a price  Quantum will notify MKE that Quantum has accepted the
non-conforming items.

     12.5.  Lot  Failures.  If a lot fails the  acceptance  quality  yield level
established  by the parties from time to time then Quantum may reject the entire
lot and require MKE technical personnel to verify individual Products in the lot
as acceptable  provided that the basis for failure of quality yield level is not
the result of a design defect.

                                       7.


<PAGE>


     12.6. Ongoing  Reliability  Testing.  MKE shall perform ongoing reliability
testing in a manner and frequency  mutually agreed upon by the parties from time
to time.

     12.7.  OEM  Customer  Inspection.  MKE shall allow with prior  arrangement,
Quantum's  OEM customers to perform or cause to be performed  inspection,  audit
and/or test of Product and/or  manufacturing  process. The OEM customer is to be
accompanied by a Quantum  employee(s) who will be the interface  between the OEM
customer and MKE.

13.      WARRANTY, PATENT INDEMNIFICATION.

     13.1. MKE Warranty.  The MKE warranty  period  extended to Quantum shall be
[CONFIDENTIAL TREATMENT REQUESTED]. Such warranty period shall commence from the
date of  delivery  of  Products  by MKE to  Quantum  as  described  in Section 9
("Payment Terms") hereof. All Products,  Unique Customer  Configured Products or
Spare Parts  furnished under this Agreement,  except for  software/firmware  and
product interface components supplied by Quantum, will be warranted by MKE to be
free of defects in materials  and  workmanship,  and will conform to  applicable
Product Specifications, drawings and/or samples provided or incorporated in this
Agreement.  Notwithstanding  the above,  the warranty  period may be extended by
mutual  agreement.  The terms of the  warranty  periods  will be  reviewed on an
annual basis. Quantum and MKE agree to negotiate in good faith extensions of the
warranty period due to competitive market conditions.

     13.2.  Quantum  Warranty.  Quantum  warrants  for the  period  of time that
Quantum  warrants  to its  customers  from the date of  delivery  of Products by
Quantum to its customers that all Products,  Unique Customer Configured Products
and Spare Parts  furnished  under this  Agreement  will be free from  defects in
design.  These  warranties shall survive any inspection,  delivery,  payment and
termination  or  expiration  of this  Agreement,  and  shall  run to MKE and MKE
Customers, or its successors and assigns.

     13.3.  Remedy.  Correction of warranty defects hereunder shall be performed
at either  Quantum's or MKE's  facility,  as MKE and Quantum  shall  agree.  MKE
shall,  with the mutual  agreement of Quantum,  repair or replace all  defective
Products, Unique Customer Configured Products and Spare Parts within thirty (30)
days of receipt of defective Products returned to it by Quantum. During the term
of this  Agreement,  and if mutually  agreed between  Quantum and MKE, MKE shall
provide, at Quantum's facility, technical personnel for the purpose of analyzing
and repairing defects in the Products,  Unique Customer  Configured Products and
Spare Parts.  Notwithstanding  the foregoing,  Quantum and MKE shall  separately
negotiate in good faith if either party believes that  different  procedures for
repair  and  replacement  of WSSG  Products  or other  new  Products  should  be
established because of the differences in such Products.

     13.4.  Warranty  Costs.  [CONFIDENTIAL TREATMENT REQUESTED]

                                       8.

<PAGE>


[CONFIDENTIAL  TREATMENT  REQUESTED].  The parties shall review on a semi-annual
basis the procedures for warranty repairs and allocation of warranty expenses as
well as the  reimbursement  policy for such warranty  repairs as hereinafter set
forth.  Initially,  a report  shall be prepared by MKE and Quantum on a calendar
quarterly basis  indicating the warranty costs incurred by the parties  pursuant
to this  Section 13.  Within  thirty  (30) days after a warranty  cost report is
submitted, the owing party shall reimburse the owed party. Any disputes pursuant
to this Section 13 shall be resolved by arbitration in the manner established by
Section 19 ("Arbitration") below.

     13.5.  Exclusive Remedy. THE WARRANTIES SET FORTH ABOVE CONSTITUTE THE SOLE
AND  EXCLUSIVE  REMEDY  OF MKE AND  QUANTUM  REGARDING  THE  PERFORMANCE  OF THE
PRODUCTS. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT,  QUANTUM AND MKE MAKE
NO  WARRANTIES,  EXPRESS OR IMPLIED,  AND HEREBY  EXPRESSLY  DISCLAIM  ALL OTHER
WARRANTIES,  INCLUDING  WITHOUT  LIMITATION ANY WARRANTY OF  MERCHANTABILITY  OR
FITNESS FOR A  PARTICULAR  PURPOSE.  NEITHER MKE OR QUANTUM  SHALL BE LIABLE FOR
CONSEQUENTIAL DAMAGES.

     13.6.  Warranty and Service by MKE for Sales by MKE to MKE  Customers.  MKE
shall at its cost,  expense  and  responsibility,  warrant the  Products  and/or
provide  after-sales  service on the Products sold to MKE  Customers  hereunder.
Notwithstanding, Quantum shall at MKE's request provide in good faith reasonable
technical  advice and  assistance  regarding  Product  design in support of such
warranty  and  after-sales  service.  Quantum  shall  reasonably  support  MKE's
requests regarding customer specifications,  firmware changes, and assignment of
part numbers for Product sold hereunder.  The parties agree to negotiate in good
faith  reasonable  terms  and  conditions  regarding  any  specification  and/or
schedule changes.

     13.7.  Patent  Indemnification.  The  provisions  of  Section  11  ("Patent
Indemnification") of the Master Agreement shall be deemed incorporated into this
Agreement.

14.      ENGINEERING CHANGES.

     14.1.  MKE Changes.  MKE shall  notify  Quantum of any  Engineering  Change
proposed to be made by MKE to the Product, Spare Parts, or manufacturing process
and shall supply a written description of the expected effect of the Engineering
Change  on the  Product  or  manufacturing  process,  including  the  effect  on
performance,  all test results of the proposed change, reliability,  quality and
serviceability  and any cost  changes  expected by the  Engineering  Change.  In
deciding  whether or not to give its consent to the inclusion of an MKE-proposed
Engineering Change, Quantum may elect to evaluate parts and/or designs specified
as  part of the  proposed  change.  Quantum  agrees  to  approve  or  disapprove
MKE-proposed  changes or respond  with  alternate  proposals  within  sixty (60)
working  days  of  receipt  of  a  written   request   including  all  necessary
documentation  and  materials to correctly  evaluate  the  requested  change for
changes  requiring  customer  approval  and ten (10)  working  days for  changes
requiring only Quantum approval.

                                       9.
<PAGE>

Quantum will use its best effort to reduce the response  time for MKE - proposed
changes that require customer approval.


     14.2.  Quantum  Changes.   Quantum  may  request,  in  writing,   that  MKE
incorporate an Engineering  Change into the Product or a manufacturing  process.
Such request will include a  description  of the proposed  change  sufficient to
permit MKE to  evaluate  its  feasibility  and the  proposed  effect on quality,
reliability,  performance, cost and serviceability. Within ten (10) working days
of such request by Quantum,  MKE will advise Quantum of the terms and conditions
under which it would make the  Engineering  Change  requested by Quantum.  MKE's
evaluation shall be in writing and shall state the cost savings or increase,  if
any,  expected to be created by the  Engineering  Change,  and its effect on the
performance,  quality, reliability, safety, appearance,  dimensions,  tolerance,
inventory  cost and lead time,  provided such advice and evaluation by MKE shall
be deemed  conditional  only and such  change  request  shall be of no force and
effect  until  such  time as  Quantum  and MKE  shall  agree in  writing  upon a
commensurate  increase or decrease in the purchase price or revision of delivery
schedule  or  both.  If  Quantum  requests  MKE in  writing  to  incorporate  an
Engineering Change into the Product or manufacturing process and it is agreed to
by MKE, the Product  Specifications  will be amended as required.  MKE shall not
unreasonably  refuse  to  incorporate  Quantum's  Engineering  Changes  into the
Product or manufacturing process.

15.      SPARE PARTS.

     15.1. Spare Parts During Product Manufacture. During the manufacture of the
Products  Quantum  shall have the right to order all piece parts for the purpose
of providing  service on the Products by Quantum,  or any authorized third party
repair  organization.  Quantum  will order Spare Parts with at least ninety (90)
days lead time and MKE agrees to supply the Spare Parts.

     15.2. Prices of Spare Parts During Product  Manufacture.  The prices of all
piece parts or subassemblies  that compose the Product  [CONFIDENTIAL  TREATMENT
REQUESTED] of the total Product price to Quantum.

     15.3. Spare Parts After Termination of Product Manufacturing. Quantum shall
have the right to purchase the recommended  Spare Parts and MKE agrees to supply
these  Spare  Parts for a period of seven (7) years  after  discontinuance  of a
relevant  model of a Product.  Quantum shall also have the right to purchase all
mutually  agreed upon  individual  piece parts from MKE or their vendors  during
this time period so that MKE is not  required to stock  every  individual  piece
part.  MKE will assist  Quantum in purchasing and obtaining the best prices from
their vendors.

     15.4.  Prices for Spare Parts After  Termination of Product  Manufacturing.
After  termination  of this  Agreement,  Prices  for the  Spare  Parts  shall be
mutually  agreed upon,  however,  the parties  agree to  negotiate  commercially
reasonable  prices for said Spare Parts. At Quantum's option certain Spare Parts
of U.S.  manufacture may be purchased directly from the manufacturers.  Warranty
for MKE - supplied Spare Parts will be the same as for the Product under Section
13 ("Warranty").  Order lead times and payment terms for parts and subassemblies
shall be the same as for Spare Parts.

16.      DOCUMENTATION.

     16.1. Quantum's Brands.

          a. Quantum  grants to MKE the right to apply such of Quantum's  Brands
to the Products to be  manufactured  and  delivered to Quantum  pursuant to this
Agreement as Quantum  shall direct upon  reasonable  written  notice.  Quantum's
Brands shall not be used in combination with any 

                                      10.
<PAGE>

other tradenames,  trademarks,  characters,  figures or marks by MKE without the
prior written  approval of Quantum.  Quantum  represents and warrants that it is
the sole and exclusive owner of Quantum's Brands and that the use thereof on the
Product will not infringe the rights of any third party.

          b. Quantum's  Brands shall be affixed to each unit of the Product,  in
such  manner as may be  specified  by  Quantum  trademark  guidelines  issued by
Quantum to MKE from time to time.

          c. Quantum shall  indemnify and hold harmless MKE from and against any
and all liabilities,  costs,  expenses,  loss and damages,  including reasonable
counsel fees and expenses for the cost of settlement, arising out of or relating
to any  claim  by any  third  party of any  proprietary  right  or  interest  in
Quantum's  Brands or any claim  relating  to any art  work,  labeling  and other
printed  matters  supplied by or included at the  direction of Quantum.  Quantum
shall,  at the request of MKE,  assume the defense of any action or suit against
MKE relating hereto, by reputable counsel reasonably  acceptable to MKE retained
at Quantum's  expense,  and shall pay any damages  assessed against or otherwise
payable by MKE as a result of the  disposition  of any such action or suit.  MKE
shall promptly notify Quantum of the commencement of any such action or suit, or
threats thereof,  and Quantum shall be afforded the opportunity to determine the
manner in which such action or suit should be handled or otherwise  disposed of.
Quantum shall not effect any  settlement  that does not provide for the full and
unconditional  release of all applicable  claims against MKE without MKE's prior
written consent.  Notwithstanding the foregoing,  if MKE is a named party in any
action  or  suit,  MKE may  participate  in any such  action  or suit at its own
expense and by its own counsel.  MKE shall not undertake to settle,  or agree to
any settlement herein, without first obtaining the written consent of Quantum.

17.      COMPONENTS.

     MKE and Quantum  agree to work  together and mutually  agree on sourcing of
parts  components to insure that  consideration be given to sources outside MKE,
given price, quality, delivery and other procurement considerations are equal.

     While Quantum and MKE will jointly develop the  specifications  for the key
components and parts,  Quantum shall be responsible for  establishing the actual
specifications  for such components and parts.  MKE shall be responsible for the
components  and parts after such  components and parts  successfully  pass MKE's
incoming test  inspection  subject to Section 13.1 ("MKE  Warranty") and Section
13.2 ("Quantum  Warranty")  hereof.  Notwithstanding  the aforesaid,  should the
application  of the previous  sentence work a hardship on either party,  Quantum
and MKE shall, in good faith, negotiate a reasonable commercial solution.

     It is contemplated that all components and parts for the Products or Unique
Customer  Configured  Products will be either provided by MKE or other worldwide
sources resulting in the lowest total cost.

     Quantum shall provide reasonable  assistance to MKE to resolve any material
problems  of such  components  and parts if such  problems  may occur  after the
commencement of mass-production of such components and parts.

18.      TERM AND TERMINATION.

     18.1.  Term.  This  Agreement  shall be  effective as of the date first set
forth  above and shall  continue  in effect  for the same  period of time as the
Master Agreement remains in effect. In the event the Master Agreement terminates
for any reason,  this Agreement shall terminate  concurrently.  In the event 

                                      11.
<PAGE>

the term of the Master  Agreement  is extended  for any reason,  this  Agreement
shall automatically be extended for the same period of time.

18.2.   [CONFIDENTIAL TREATMENT REQUESTED]

                                      12.
<PAGE>


[CONFIDENTIAL TREATMENT REQUESTED]

          b. [CONFIDENTIAL TREATMENT REQUESTED].


18.3.    Rights Upon Termination.

          a.  In the  event  of any  termination  of  this  Agreement  following
completion of the wind down period under Section 18.2, Articles 1, 6, 9, 13, 15,
16, 19, 20 and 21, and Sections 18.2 and 18.3 shall survive.

          b.  In  addition,  in the  event  of any  valid  termination  of  this
Agreement by MKE under Section 18.2  ("Termination") due to a material breach by
Quantum,  MKE shall be entitled to damages as awarded in arbitration pursuant to
Section 19 ("Arbitration").

          c.  In  addition,  in the  event  of any  valid  termination  of  this
Agreement by Quantum under Section 18.2 ("Termination") due to a material breach
by MKE, Quantum shall be entitled to damages as awarded in arbitration  pursuant
to Section 19 ("Arbitration").

          d. This  Section sets forth the sole remedy of a party in the event of
a material breach of this Agreement by the other party.

19.      ARBITRATION.

     This Agreement  shall be governed in all respects by the laws of the United
States of  America  and by the laws of the State of  California,  excluding  its
conflict of law  provisions.  This  Agreement  is prepared  and  executed in the
English  language  only and any  translation  of this  Agreement  into any other
language shall have no effect. All disputes, controversy or claim arising out of
or  relating  to this  Agreement,  or the  breach,  termination,  or  invalidity
thereof, shall be settled by arbitration in Geneva,  Switzerland,  in accordance
with the  United  Nations  Commission  on  International  Trade  Law  (UNCITRAL)
Arbitration  Rules. The language of the arbitration shall be English.  The award
rendered by the arbitrator  shall include costs of the  arbitration,  reasonable
attorneys' fees and reasonable costs for experts and other  witnesses.  Judgment
on the award may be entered in any court having jurisdiction.  The parties agree
that the  arbitrator  shall  have the  authority  to issue  interim  orders  for
provisional relief, including, but not limited to, orders for injunctive relief,
attachment or other  provisional  remedy, as necessary to protect either party's
name, proprietary information,  trade secrets, know-how or any other proprietary
right.  The  parties  agree that any  interim  order of the  arbitrator  for any
injunctive  or other  preliminary  relief shall be  enforceable  in any court of
competent  jurisdiction.  In  addition,  either  party  shall  be  free  to seek
provisional relief from any court of competent jurisdiction, in order to protect
that  party's  name or  proprietary  rights,  prior to or after the  arbitration
procedure set forth in this Section.

     Anything in this  Agreement  to the contrary  notwithstanding,  in no event
shall the  failure  to agree  upon the prices of the  Products  and the  minimum
quantities be subject to arbitration.

                                      13.

<PAGE>

20.      GOVERNMENTAL CONSENTS.

     20.1.  Compliance  with Laws.  All  parties  agree  during the term of this
Agreement  to comply  with all  applicable  laws of any  country  or  government
authority  including,  but not limited to Foreign  Exchange  and  Foreign  Trade
Control Act and Export Trade Control Order of Japan and administrative  guidance
prohibiting  use of products or technology  for design or manufacture of nuclear
weapons,   chemical  weapons,   biological   weapons  or  missiles,   or  Export
Administration  Act and Regulations of the United States.  The parties recognize
and agree that products and technology  delivered or transferred  from one party
to the other party may be subject to restrictions on export or re-export imposed
by the United  States  Department  of Commerce or the Ministry of  International
Trade and Industry of Japan.

21.      MISCELLANEOUS.

     21.1. Nonassignability. Except as specifically permitted by this Agreement,
neither  party  may  assign,  transfer  or  sublicense  any  of  the  rights  or
obligations arising under this Agreement  (including any affiliate or subsidiary
of a party) other than to a successor to its entire business by reason of merger
or sale of assets provided that the other party first receives written notice of
any such  proposed  merger  or sale of  assets  and the  intended  successor  in
interest of such proposed merger or sale of assets pursuant to such  transaction
acknowledges  in  writing  to be  bound  by the  terms  and  conditions  of this
Agreement,  without  the  prior  written  consent  of the other  party,  and any
attempted assignment without such consent shall be void and without effect.

     21.2.  Failure to Enforce.  The  failure of either  party to enforce at any
time or for any period of time the  provisions  of this  Agreement  shall not be
construed  to be a waiver of such  provisions  or of the right of such  party to
enforce each and every such provision.

     21.3.  Governing Law. This Agreement  shall be governed by and construed in
accordance  with the laws of the State of California,  United States of America,
excluding its conflict of law provisions.

     21.4.  Severability.  In the  event  that  any of the  provisions  of  this
Agreement  shall be held by a court or other tribunal of competent  jurisdiction
to be  unenforceable,  the remaining  portions of this Agreement shall remain in
full force and effect.

     21.5.  Notices.  Any notice which any party desires or is obligated to give
to the other shall be given in writing and sent to the appropriate address shown
below or to such other  address as the party to receive the notice may have last
designated in writing in the manner herein provided.  Unless otherwise provided,
any notice  required or permitted under this Agreement shall be given in writing
and shall be deemed effective (i) if personally delivered, at the time delivered
by hand,  (ii) if delivered  by facsimile  transmission,  upon  confirmation  of
transmission,  (iii) if by courier,  on the business day such courier guarantees
delivery,  and (iv) if delivered  by U.S.  Mail,  seven (7) business  days after
deposit in the U.S. mail, postage prepaid, all properly addressed as follows:

                              Quantum Corporation
                              500 McCarthy Boulevard
                              Milpitas, CA 95035
                              Attention: Chief Executive Officer
                              facsimile: (408) 232-6798

                                       14.
<PAGE>

                              Matsushita-Kotobuki Electronics
                              Industries, Ltd.
                              8-1 Furujin-Machi
                              Takamatsu-City, Kagawa 760, Japan
                              Attention: Takashi Honjo, President
                              facsimile: 011-81-(878) 511047

                              Quantum Peripherals (Europe) SA
                              Champs-Montants 16a
                              CH-2074 Marin-Epagnier
                              Neuchatel, Switzerland
                              Attention: Chief Executive Officer
                              facsimile: 011-41-32-753-5541

                              Ireland Kotobuki Electronics, Ltd.
                              Finnabair Industrial Park, Coe's Road
                              Dundalk, Co Louth
                              The Republic of Ireland
                              Attention: Managing Director

                              Kotobuki Electronics Industries (s) Pte. Ltd.
                              2 Corporation Road #02-01/12, #04-01/12
                              Corporation Place
                              Singapore  618494

     21.6.  Entire  Agreement.  Except for the Master  Agreement,  an  Inventory
Storage  Agreement  between the parties  effective  December 8, 1993,  a Revised
Hydrodynamic Spindle Motor Proprietary Right and Manufacturing Agreement between
the parties effective February 3, 1995, and a Limited Voice Messaging/Processing
Industry Sales Agreement between the parties effective July 28, 1993, as well as
any agreements  between the parties regarding the establishment and operation of
TA Diamond LLC (which may be known in future as Quantum-MKE Components LLC), and
the supply of products  manufactured  by such  entity,  this  Agreement  and any
attachments or exhibits hereto constitute the entire agreement among the parties
pertaining to the subject matter  hereof,  and any and all other written or oral
agreements   existing   between  the  parties  are   expressly   canceled.   Any
modifications of this Agreement must be in writing and signed by duly authorized
officers of all parties.

     21.7. Force Majeure. In the event of any delay in performance or failure of
performance  of  obligations  under this  Agreement  by either  party due to any
causes  arising  from  acts of  God,  war,  mobilization,  riot,  strike,  fire,
earthquake,  flood, embargo,  delay of carrier, power failure or attributable to
acts, events or omissions beyond the reasonable  control of the party concerned,
such delay or failure of performance shall not be deemed a default and the party
so delayed or prevented  shall be under no liability for loss or injury suffered
by the other party.  Nothing in this paragraph  shall affect the right of either
party to terminate this Agreement as otherwise provided herein.

     21.8. LIMITATION OF LIABILITY. IN NO EVENT AND UNDER NO CIRCUMSTANCES SHALL
ANY PARTY  UNDER  THIS  AGREEMENT  BE LIABLE FOR ANY  

                                      15.

<PAGE>

SPECIAL  OR  CONSEQUENTIAL  DAMAGES  OR LOSS OF  PROFITS  OF THE OTHER  PARTY OR
PARTIES OR ANY  EXPENDITURES,  COSTS OR INVESTMENTS MADE OR INSURED BY THE OTHER
PARTY OR PARTIES AS PROVIDED HEREIN.

     21.9. Binding. This Agreement does not apply to the design,  manufacture or
supply to or from TA Diamond  LLC,  of products or  components  to either  party
hereunder,  which are addressed by separate  agreement  among the parties hereto
and TA Diamond LLC.

     21.10.  Agency.  This  Agreement  does not  create a  principal  to  agent,
employer to  employee  partnership,  joint  venture,  or any other  relationship
except that of independent contractors between Quantum and MKE.

     21.11. Headings.  Headings to Paragraphs and Sections of this Agreement are
to facilitate  reference only, do not form a part of this  Agreement,  and shall
not in any way affect the interpretation hereof.

     21.12.  Trading  Company.  Unless otherwise agreed to in writing by MKE and
Quantum,  MKE and Quantum  agree that either  Quantum will  establish a "trading
company" (as  hereafter  defined) or establish a  relationship  with an existing
trading  company  acceptable to MKE, for the purpose of expediting the necessary
documentation for that shipment of Products and Spare Parts under this Agreement
and the  importation  of  components  and  parts by  Quantum  for MKE and may be
responsible  pursuant to the specific terms and times of payment as provided for
elsewhere in this  Agreement for the collection and payment of all monies due to
the appropriate party under this Agreement during the term of this Agreement and
any other functions necessary to carry out the business between Quantum and MKE.
A "trading company" shall mean such organization  existing,  or to exist,  which
is, or shall be,  able to  effect  the  functions  described  in the  proceeding
sentence. At any time during the term of this Agreement,  Quantum shall have the
right to establish its own trading  company to act as such in replacement of any
prior  existing  relationship,  or Quantum  may change its  relationship  from a
non-Quantum  affiliated  trading  company  to any other  non-Quantum  affiliated
trading  company,   with  the  written  consent  of  MKE,  which  shall  not  be
unreasonably withheld.

                                      16.

<PAGE>


       IN WITNESS  WHEREOF,  the parties hereto here caused this Agreement to be
duly  executed by their  respective  authorized  officers as of the day and year
first above written. Notwithstanding such execution, this Agreement shall become
effective only after obtaining required approval of the government of Japan.

                                          QUANTUM CORPORATION


                                          By: /s/ Michael Brown
                                              ----------------------------------
                                              Name: Michael Brown
                                              Title: President and CEO

                                          QUANTUM PERIPHERALS
                                          (EUROPE) SA


                                          By: /s/ Andrew Kryder
                                              ----------------------------------
                                              Name: Andrew Kryder
                                              Title:

                                          MATSUSHITA-KOTOBUKI
                                          ELECTRONICS INDUSTRIES, LTD.


                                          By: /s/ Takashi Hanjo
                                              ----------------------------------
                                              Name: Takashi Hanjo
                                              Title: President

                                          IRELAND KOTOBUKI
                                          ELECTRONICS INDUSTRIES, LTD.


                                          By: /s/ Yoshiyuki Aono
                                              ----------------------------------
                                              Name: Yoshiyuki Aono
                                              Title: Managing Director

                                          KOTOBUKI ELECTRONICS
                                          INDUSTRIES (S) PTE. LTD.

                                          By: /s/ Hironijo Sakioka
                                              ----------------------------------
                                              Name: Hironijo Sakioka
                                              Title: Managing Director

                     AMENDED AND RESTATED PURCHASE AGREEMENT

                                      17.

041797

     LICENSE AGREEMENT  ("Agreement")  with an Effective Date of January 1, 1996
between  INTERNATIONAL  BUSINESS  MACHINES  CORPORATION,  a New York corporation
("IBM"), and QUANTUM CORPORATION, a Delaware corporation ("QUANTUM").

     Each of the  parties  (as  "Grantee")  desires  to  acquire a  nonexclusive
license under patents of the other party (as "Grantor"). In consideration of the
premises  and  mutual  covenants  herein  contained,  IBM and  QUANTUM  agree as
follows:

Section 1.      Definitions

1.1 "Information Handling System" shall mean any instrumentality or aggregate of
instrumentalities  primarily designed to compute,  classify,  process, transmit,
receive, retrieve, originate, switch, store, display, manifest, measure, detect,
record,  reproduce,  handle or utilize any form of information,  intelligence or
data for business, scientific, control or other purposes.

1.2  "IHS  Product"   shall  mean  an   Information   Handling   System  or  any
instrumentality   or  aggregate   of   instrumentalities   (including,   without
limitation, any component, subassembly, computer program or supply) designed for
incorporation  in  an  Information   Handling  System.  Any  instrumentality  or
aggregate of  instrumentalities primarily  designed  for use in the  fabrication
(including testing) of an IHS Product licensed herein shall not be considered to
be an IHS Product.

1.3 "Subsidiary" of a party hereto or of a third party shall mean a corporation,
company or other entity:  

(a)  more than fifty  percent  (50%) of whose  outstanding  shares or securities
     (representing  the right to vote for the  election  of  directors  or other
     managing authority) are, now or hereafter, owned or controlled, directly or
     indirectly,  by a party hereto or such third party,  but such  corporation,
     company or other entity shall be deemed to be a Subsidiary  only so long as
     such ownership or control exists; or

(b)  which does not have outstanding shares or securities, as may be the case in
     a partnership,  joint venture or unincorporated association,  but more than
     fifty percent (50%) of whose ownership  interest  representing the right to
     make the decisions for such corporation,  company or other entity is now or
     hereafter, owned or controlled, directly or

                                       1

<PAGE>


    indirectly,  by a party  hereto or such third party,  but such  corporation,
    company or other entity  shall be deemed to be a Subsidiary  only so long as
    such ownership or control exists.

1.4     "IBM  Licensed  Patents"  and  "QUANTUM  Licensed  Patents"  shall  mean
all  patents,   including   utility  models  and  typeface  design  patents  and
registrations  (but not including any other design patents or  registrations) of
Grantor: 

(a)  [CONFIDENTIAL TREATMENT REQUESTED];

(b)  which,  but for this  Agreement,  would be infringed  by Grantee's  making,
     using,  importing,  offering  for sale,  or leasing,  selling or  otherwise
     transferring  a  Grantee's  Licensed  Product in the  country in which such
     patent exists; and 

(c)  under  which  patents or the  applications  therefor  Grantor or any of its
     Subsidiaries now has, or hereafter obtains,  the right to grant licenses to
     Grantee of or within the scope  granted  herein  without  such grant or the
     exercise of rights  thereunder  resulting  in the payment of  royalties  or
     other consideration by Grantor or its Subsidiaries to third parties (except
     for payments  between Grantor and its  Subsidiaries,  and payments to third
     parties for inventions made by said third parties while employed by Grantor
     or any of its Subsidiaries).

Licensed Patents shall include said patent  applications,  continuations in part
of said patent  applications,  and any patents reissuing on any of the aforesaid
patents.

1.5  "Licensed  Patents"  shall  mean  either  IBM  Licensed  Patents or QUANTUM
Licensed Patents as the context indicates.

1.6  "IBM Licensed Products" shall mean IHS Products.

1.7  "Magnetic  Disk" shall mean a platter-like  rigid element having a magnetic
material coated or plated on or otherwise  deposited on, or incorporated in, one
or both planar surfaces of said element and primarily  designed for magnetically
or magneto-optically  storing digital information recorded thereon or reproduced
therefrom while said element is rotating.

1.8  "Program" shall mean a plurality of instructions  capable of being executed
by  another  IHS   Product,   whether  or  not  such   instructions   are  in  a
machine-readable form and whether or not


                                       2
<PAGE>


such  plurality  of  instructions   require   processing  such  as  assembly  or
compilation prior to being so executed.

1.9  "Rotating  Magnetic Memory Product" (hereinafter "RMM Products") shall mean
an IHS  Product  primarily  designed  to record  and/or  read,  magnetically  or
magneto-optically,  digital  information  on or from a rotating  Magnetic  Disk,
which may be either fixed or removable,  and any instrumentality or aggregate of
instrumentalities   (including  any  Magnetic  Disk)   primarily   designed  for
incorporation therein.

1.10 "Tape  Transport"  shall mean an IHS Product  primarily  designed to effect
relative movement between a magnetic tape and one or more magnetic  transducers,
each transducer operative to read and/or write information from or on such tape,
whether  or not  such  instrumentality  or  aggregate  of  instrumentalities  is
mechanically or electrically  connected to other apparatus but shall not mean or
include such other  apparatus.  The term "Tape Transport" shall also include any
instrumentality,   including  a  multi-cartridge  tape  loader  and  tape  media
cartridge,   or   aggregate   of   instrumentalities   primarily   designed  for
incorporation in such an IHS Product.

1.11  "Data Storage Transducer" shall mean a magnetic transducing unit operative
to read and/or write  information  from or on a Magnetic  Disk or magnetic  tape
while operating in close physical proximity thereto.

1.12  "Semiconductor  Material"  shall mean any material whose  conductivity  is
intermediate  to that of metals and  insulators  at room  temperature  and whose
conductivity,   over  some  temperature  range,   increases  with  increases  in
temperature.  Such  materials  shall  include,  but not be limited  to,  refined
products, reaction products, reduced products, mixtures and compounds.

1.13  "Solid  State  Disk"  shall  mean  any  instrumentality  or  aggregate  of
instrumentalities,  which  is  coupled  to a CPU or  auxiliary  apparatus  via a
Controller  Apparatus  and  peripheral  bus  and is  designed  for  storage  and
reproduction  of  digital  information  by  selectively  setting  or  presetting
detectable  states in Semiconductor  Material forming at least a portion of such
instrumentality  or  aggregate  of  instrumentalities.  A Solid  State  Disk may
include   powering  means  and  auxiliary   and/or  support  circuits  (such  as
regeneration means, true-complement

                                       3

<PAGE>


generation  means,   address  means,  address  decoding  means,  sensing  means,
selection means input/output means) to control the flow of such information into
or out of such Solid State Disk.

1.14  "RAID  Product"  shall  mean an IHS  Product,  having a  plurality  of RMM
Products acting in concert as an array, primarily designed to record and/or read
digital  information  to or  from  the  RMM  Products  in  the  array,  and  for
reconstituting  any digital  information which as stored on a failed RMM Product
in the array from digital  information  stored on the  remaining RMM Products in
the array.

1.15  "Controller  Apparatus"  shall mean an IHS Product which is  substantially
physically resident within an RMM Product,  Solid State Disk or a Tape Transport
and is primarily  designed to serve as an interface  between a central processor
or  auxiliary  apparatus  (which  term shall  include,  without  limitation,  an
input/output channel for a central processor) and such RMM Product,  Solid State
Disk or Tape  Transport,  whether or not such  apparatus is physically  separate
from such central  processor or auxiliary  apparatus or such RMM Product,  Solid
State  Disk  or  Tape  Transport,   for  interpreting  and  executing  commands,
translating  data formats,  checking and  maintaining  integrity of information,
furnishing status information,  or indexing,  searching,  selecting,  switching,
locating,  comparing or controlling  information in, on or with respect to, such
RMM Product, Solid State Disk or Tape Transport.  Such apparatus shall be deemed
to be a  Controller  Apparatus  notwithstanding  that  it  is  also  capable  of
performing  the  aforesaid  functions  while  not  connected  to said  central
processor or auxiliary apparatus.

1.16  "Controller  Program"  shall mean a plurality of  instructions  capable of
being compiled, executed or interpreted by a Controller Apparatus whether or not
such instructions are in a machine-readable form.

1.17  "Program  Medium"  shall  mean  any  medium  primarily  designed  for  and
containing a Controller Program.

1.18  "Net  List" shall  mean a  detailed  specification  of  circuit  functions
implementing  logic or circuit equations to carry out defined  operational tasks
within a custom or  "Application-Specific-Integrated-Circuit" (ASIC) utilizing a
vendor-supplied library of functional circuit elements such as AND gates, OR

                                       4

<PAGE>


gates, multipliers,  flip-flops,  etc. to lay out mask sets and manufacture ASIC
Semiconductor Chips.

1.19   "Semiconductor   Chip"  shall  mean  an  integral   unit   containing  an
interconnected  array of active and/or passive  elements,  integrated on or in a
single substrate comprising  Semiconductor Material where such unit is primarily
designed to be used in relation to a QUANTUM Licensed Product.

1.20 "QUANTUM Licensed Products" shall mean RMM Products, Tape Transports, Solid
State Disks,  Controller  Apparatus,  Controller  Programs,  Semiconductor Chips
designed  by QUANTUM or  generated  from Net Lists  authored  by  QUANTUM,  Data
Storage  Transducers,  Program Mediums, and any combinations of any, some or all
of the  foregoing.  The term Quantum  Licensed  Products  shall not include RAID
Products.

1.21  "Licensed  Products"  shall mean either IBM  Licensed  Products or QUANTUM
Licensed Products as the context indicates.

Section 2. Grants of Rights

2.1  Subject to the  provisions  of  Sections  2.3,  2.4 and 4, IBM on behalf of
itself and its Subsidiaries grants to QUANTUM a worldwide,  nonexclusive license
under  the IBM  Licensed  Patents:

(a)  to use,  import,  and lease,  sell and otherwise  transfer QUANTUM Licensed
     Products;

(b)  to make QUANTUM Licensed Products other than RMM Products and Semiconductor
     Chips,  to use any apparatus in the  manufacture of such  products,  and to
     practice any method or process in such manufacture;

(c)  to have QUANTUM Licensed Products made by another  manufacturer for the use
     and/or lease,  sale or other  transfer by QUANTUM only when the designs and
     specifications  for such QUANTUM Licensed  Products were created by QUANTUM
     (either  solely  or  jointly  with one or more  third  parties);  provided,
     however the license under this Section 2(c):
             
     (i)    with   respect   to   Semiconductor   Chips   shall  only  be  under
            non-manufacturing method and/or non-manufacturing  process claims of
            IBM  Licensed   Patents,   the   infringement   of  which  would  be
            necessitated by compliance with such designs and specifications; and

     (ii)   with respect to QUANTUM Licensed  Products other than  Semiconductor
            Chips  shall  only be under  claims  of IBM  Licensed  Patents,  the
            infringement of which would be

                                       5
<PAGE>


            necessitated by compliance with such designs and specifications; and
          
     (iii)  shall  not  apply  to any  QUANTUM  Licensed  Products  in the  form
            manufactured  or  marketed  by  said  other  manufacturer  prior  to
            QUANTUM's furnishing of said designs and specifications;  and 

(d)  to make RMM  Products,  to use any  apparatus  in the  manufacture  of such
     products,  and to practice any method or process in such  manufacture,  but
     this  license  shall  only be  effective  in the event that  QUANTUM's  RMM
     Product  foundry is unable to supply such products to QUANTUM,  and in such
     event,  [CONFIDENTIAL TREATMENT REQUESTED].

          Unless QUANTUM informs IBM to the contrary, QUANTUM shall be deemed to
     have  authorized  said other  manufacturer  to make said  QUANTUM  Licensed
     Products  under the license  granted to QUANTUM in this Section 2.1(c) when
     the condition  specified herein is fulfilled.  Within thirty (30) days of a
     written  request  identifying a product and a  manufacturer,  QUANTUM shall
     inform IBM of the quantity of such product,  if any,  manufactured  by such
     manufacturer.

In the event that neither IBM nor any of its Subsidiaries has the right to grant
a license under any particular IBM Licensed  Patent of the scope set forth above
in this Section  2.1,  then the license  granted  herein under said IBM Licensed
Patent shall be of the broadest scope which IBM or any of its  Subsidiaries  has
the right to grant within the scope set forth above.

Upon receipt by IBM of all payments  specified in Section 4, the license granted
to QUANTUM shall be fully paid-up.

2.2  Subject to the  provisions  of Section 2.4, QUANTUM on behalf of itself and
its Subsidiaries grants to IBM a worldwide, fully paid-up,  nonexclusive license
under the QUANTUM Licensed Patents:

     (a)  to make,  use,  import,  and lease,  sell or  otherwise  transfer  IBM
          Licensed Products;

     (b)  in the  manufacturing of IBM Licensed  Products,  to use any apparatus
          and practice any method or process; and

     (c)  to have IBM Licensed Products made by another manufacturer for the use
          and/or lease,  sale or other transfer by IBM only when the designs and
          specifications  for such IBM  Licensed  Products  were  created by IBM
          (either solely or jointly with

                                       6

<PAGE>


          one or more third parties);  provided,  however the license under this
          Section 2.2(c):

         (i)   shall  only be under  claims of  QUANTUM  Licensed  Patents,  the
               infringement  of which would be  necessitated  by compliance with
               such designs and specifications; and

         (ii)  shall  not  apply  to any  IBM  Licensed  Products  in  the  form
               manufactured  or  marketed  by said other  manufacturer  prior to
               IBM's furnishing of said designs and specifications.

               Unless IBM informs  QUANTUM to the contrary,  IBM shall be deemed
          to have authorized  said other  manufacturer to make said IBM Licensed
          Products under the license  granted to IBM in this Section 2.2(c) when
          the condition  specified herein is fulfilled.  Within thirty (30) days
          of a written  request  identifying a product and a  manufacturer,  IBM
          shall  inform  QUANTUM  of the  quantity  of  such  product,  if  any,
          manufactured by such manufacturer.

In the event that neither QUANTUM nor any of its  Subsidiaries  has the right to
grant a license under any particular  QUANTUM  Licensed  Patent of the scope set
forth above in this  Section  2.2,  then the license  granted  herein under said
QUANTUM  Licensed  Patent shall be of the broadest scope which QUANTUM or any of
its Subsidiaries has the right to grant within the scope set forth above.

2.3  Notwithstanding  the rights granted to QUANTUM by IBM in this Section 2, no
license or immunity is granted  hereunder by IBM with  respect to  Semiconductor
Chips made, used, sold,  leased, or otherwise  transferred by QUANTUM separately
from any other QUANTUM  Licensed  Products  [CONFIDENTIAL TREATMENT REQUESTED]

                                       7

<PAGE>

[CONFIDENTIAL TREATMENT REQUESTED]

2.4 No license or immunity is granted by either party hereto either  directly or
by implication,  estoppel or otherwise to any third parties acquiring items from
either  party for the  combination  of such  acquired  items  with  other  items
(including  items  acquired  from  either  party  hereto) or for the use of such
combination  even if such acquired items have no  substantial  use other than as
part of such a combination.

2.5  Subject to Section 2.6, the licenses granted herein shall include the right
of each party to grant  sublicenses to its  Subsidiaries,  which sublicenses may
include the right of sublicensed  Subsidiaries to sublicense other  Subsidiaries
of said party. No sublicense  shall be broader in any respect at any time during
the life of this  Agreement than the license held at that time by the party that
granted the sublicense.

2.6  A sublicense  granted to a Subsidiary  shall terminate on the earlier of:

(a)   the date such Subsidiary ceases to be a Subsidiary; and

(b)   the date of  termination  or  expiration  of the license of the party that
      granted the sublicense.

If a Subsidiary  ceases to be a Subsidiary  and holds any patents  under which a
party  hereto is  licensed,  such  license  shall  continue for the term defined
herein.

2.7 If, after the Effective Date, a party or any of its Subsidiaries ("Acquiring
Party") acquires assets,  either by acquiring an entity which owns the assets or
by acquiring the assets from such an entity,  and said entity is, as of the date
of  acquisition,  licensed  by the other  party  ("Licensor")  under one or more
Licensed  Patents through an existing  agreement  pursuant to which royalties or
other  payments are made by said entity to said  Licensor,  then the license and
other rights granted herein to the Acquiring Party with respect to said Licensed
Patents  shall apply to products  manufactured  through the use of said  assets;
provided, however, such royalties or other payments shall continue to be made by
the  Acquiring  Party to the  Licensor  with  respect to  products  manufactured
through the use of said assets notwithstanding that the Acquiring Party may have
been licensed for the same Licensed Products before the acquisition.

                                       8

<PAGE>


2.8 If one party transfers a product line,  either as part of or separate from a
disposition  of a Subsidiary to any third party,  and if such transfer  includes
[CONFIDENTIAL  TREATMENT  REQUESTED],  then after  written  request to the other
party hereto jointly by the transferring party and such third party within sixty
(60) days following the transfer, the other party hereto agrees to grant to such
third party a royalty-free  license (under the same terms as the license granted
to said one party herein) under the other party's Licensed Patents for the field
(as defined between the transferring party and such third party) of such product
line provided that:

(a)   such field  shall be within the field then  licensed  to the  transferring
      party;

(b)   such field shall not be defined more broadly than appropriate to cover the
      particular  product  line  being  transferred  and  shall  be in form  and
      substance acceptable to such other party;

(c)   the license  granted  shall be subject to a revenue cap  which (i) for the
      twelve  (12)  month  period  following  the  transfer  shall be set at the
      revenue  attributable  to the sale of products in the product  line in the
      last full  calendar year prior to the date of transfer plus the greater of
      ten  percent  (10%) and the average  growth  rate during the two  calendar
      years preceding the transfer;  and (ii) for subsequent  twelve (12) months
      period  shall  also  be  subject  to  an  annual  compounded  growth  rate
      calculated according to the same formula;

(d)   the  transferring  party shall  relinquish its rights under this Agreement
      for such field for five (5) years following such transfer;

(e)   such third party shall  grant to such other party a  royalty-free  license
      (under the same terms as the license  granted to such other party  herein)
      under all Third Party  Patents for all  products  licensed  herein to such
      other party on the Effective Date of this Agreement. "Third Party Patents"
      shall mean all  patents  throughout  the world  under  which,  at any time
      commencing with the date of the product line transfer,  the third party or
      any of its Subsidiaries has the right to grant such licenses; and

(f)   this  Section  2.8,  Section 3, and  Section 4 shall be  omitted  from the
      license granted to such third party.

The  relinquishing  of its rights by such  transferring  party  pursuant to this
Section 2.8 shall be  automatically  effected as an  amendment  hereto as of the
effective date of such transfer,

                                       9

<PAGE>


which amendment shall  automatically  terminate five (5) years after the date of
transfer,  but  licenses  to such  transferring  party  to use,  lease,  sell or
otherwise  transfer  apparatus that was  manufactured  by or for it prior to the
time of such relinquishing shall continue with respect to such apparatus.

Section 3.    Releases

3.1 Each party (as  "Releasor") on behalf of itself and its  Subsidiaries  which
are Subsidiaries as of the Effective Date, irrevocably releases the other party,
its  Subsidiaries  which are  Subsidiaries  as of the Effective Date and its and
their respective customers from any and all claims of infringement of Releasor's
Licensed  Patents  which claims are based on acts prior to the  Effective  Date,
which, had they been performed after the Effective Date would have been licensed
under this Agreement.

The  release  contained  herein  shall not apply to any  person  other  than the
persons  named in this Section 3 and shall not apply to the  manufacture  of any
items by any person other than the other party or its Subsidiaries.  The release
granted by QUANTUM to IBM is effective  as of the  Effective  Date.  The release
granted  by IBM to  QUANTUM  shall  become  effective  upon  receipt  of payment
specified in Section 4.1.

Section 4.   Payment

4.1 [CONFIDENTIAL TREATMENT REQUESTED]: 

(a)   [CONFIDENTIAL TREATMENT REQUESTED]; and

(b)   [CONFIDENTIAL TREATMENT REQUESTED].

4.2  QUANTUM shall be liable for interest on any overdue payment  required to be
made pursuant to Section 4,  commencing on the date such payment becomes due, at
an annual rate which is the greater of ten percent (10%) or one percentage point
higher  than the prime  interest  rate as quoted by the head  office of Citibank
N.A.,  New York, at the close of banking on such date, or on the first  business
day thereafter if such date falls on a  non-business  day. If such interest rate
exceeds the maximum legal rate in  the jurisdiction  where a claim  therefore is
being

                                       l0
<PAGE>


asserted, the interest rate shall be reduced to such maximum legal rate.

4.3  If an installment  payment  set forth in Section 4.1 is not made by its due
date,  and if such payment,  plus interest  pursuant to Section 4.2, is not made
prior to sixty (60) days after notice from IBM of QUANTUM's  delinquency,  then,
at IBM's sole option,  either:

(a)   all of the above  installment  payments  which were due after such  notice
      shall  automatically  become due and payable in full on the  sixtieth  day
      after such notice without presentment,  demand or additional notice of any
      kind (all of which are hereby expressly waived); or

(b)   all   licenses  and  other  rights   granted   herein  to  QUANTUM   shall
      automatically terminate on the sixtieth day after such notice.

QUANTUM  shall  remain  obligated to pay all  installments  which had become due
prior to such notice  (plus  interest  thereon as  provided in Section  4.2) and
QUANTUM shall not be obligated to make any other payments. IBM's election of the
option set forth in Section  4.3 (a) or 4.3 (b) shall be stated in such  notice.
Such notice shall be given as stated in Section 6 herein.

Section 5.  Term of Agreement; Acquisition of a Party

5.1 The term of the  licenses  granted  under this  Agreement  shall be from the
Effective  Date  until *  [CONFIDENTIAL  TREATMENT  REQUESTED],  unless  earlier
terminated under the provisions of this Agreement.

5.2  IBM shall  have the right to  terminate  the license  and any other  rights
granted to QUANTUM  granted under this Agreement if QUANTUM fails at any time to
make any payment  required  herein,  and if QUANTUM  does not cure such  failure
(including  the payment of any  interest)  within sixty (60) days after  written
notice from IBM to QUANTUM specifying the nature of such failure.

5.3 If one party (the "Acquired Party") is acquired by a third party, becoming a
Subsidiary  of such third  party:

(a)   the Acquired Party shall  promptly give notice of such  acquisition to the
      other party;

(b)   the date in Section 1.4 (a) shall automatically change to the date of such
      acquisition;   

(c)   the license granted to the Acquired Party shall  automatically  be subject
      to an annual revenue cap which shall be set at the revenue attributable to
      the sale of the

                                       11


<PAGE>


      Acquired Party's Licensed Products in the last full calendar year prior to
      the date of such  acquisition  plus an annual,  compounded  growth  factor
      calculated at the average  growth rate during the last two calendar  years
      prior to the date of acquisition;  

(d)   all  payments  specified  in Section 4 (if any) which would have been paid
      after  the  date of such  acquisition  shall  become  immediately  due and
      payable; and

(e)   the rights of the non-Acquired party shall not be affected.

5.4  If one party (the "Acquired  Party") is acquired by a third party such that
it is no longer a separate  legal entity,  then the Acquired Party shall require
as a condition precedent to the acquisition that the entity that survives after,
or results from, such  acquisition  shall be obligated to make the payments,  if
any, due pursuant to Section 4.

5.5 Providing that the parties are actively  engaged in good faith  negotiations
toward a renewal of this Agreement,  each party agrees not to bring suit against
the  other  for  patent  infringement  for  a  period  of  six  months  after  *
[CONFIDENTIAL  TREATMENT  REQUESTED],  to  allow  time to  conclude  a  mutually
acceptable renewal.

Section 6.    Means of Payment and Communication

6.1 Payment shall be made by electronic funds transfer. Payments shall be deemed
to be made on the date credited to the following account:

       IBM, Director of Licensing
       The Bank of New York
       48 Wall Street
       New York, New York 10286
       United States of America
       [CONFIDENTIAL TREATMENT REQUESTED]

6.2 Notices and other communications shall be sent by facsimile or by registered
or  certified  mail to the  following  addresses  and  shall be  effective  upon
mailing:

                                       12

<PAGE>


      For IBM:                                   For QUANTUM:
      Director of Licensing                      Office of Corporate
      IBM Corporation                            General Counsel
      500 Columbus Avenue                        Quantum Corporation
      Thornwood, New York 10594                  500 McCarthy Boulevard
                                                 Milpitas, CA 95035
      Facsimile: (914) 742-6737                  Facsimile: (408) 324-7005

Section 7.   Miscellaneous

7.1  Neither  party shall  assign or grant any right  under any of its  Licensed
Patents  unless such  assignment  or grant is made  subject to the terms of this
Agreement.

7.2  Neither  party  shall  assign  any of its  rights  or  delegate  any of its
obligations under this Agreement. Any attempt to do so shall be void. However, a
party which  undergoes  reorganization  may assign such rights and delegate such
obligation to its legal successor,  provided that after the reorganization,  the
successor and its  Subsidiaries  will have  essentially  the same assets as such
party and its Subsidiaries had prior to the reorganization.

7.3  Neither party shall use or refer to this Agreement or any of its provisions
in any  promotional  activity.  Brief  reference to this  Agreement in financial
statements and reports of either party,  including by example,  filings with the
U.S. Securities and Exchange  Commission,  shall not be deemed to be promotional
activity within the scope of this Section 7.3.

7.4 Each party  represents  and warrants that it has the full right and power to
grant the  license  and  release set forth in Sections 2 and 3. Each party (as a
Grantor)  further  represents  and warrants  that prior to the execution of this
Agreement,  it has  informed  the other  party of any  patent  originating  from
inventions made by employees of Grantor or its Subsidiaries, which patent is now
owned  by  Grantor  or  its  Subsidiaries  and  which  patent,  owing  to  prior
arrangements  with third  parties,  does not  qualify  as a  Licensed  Patent of
Grantor  under which  licenses are granted in Section 2. Neither party makes any
other  representation or warranties,  express or implied, nor shall either party
have any liability in respect of any  infringement of patents or other rights of
third  parties  due to the other  party's  operation  under the  license  herein
granted.

7.5 Nothing  contained in this  Agreement  shall be construed as conferring  any
rights by implication, estoppel or otherwise,

                                       13

<PAGE>


under any non-patent intellectual property right, or any patents, other than the
Licensed Patents.  Neither party is required hereunder to furnish or disclose to
the other any  technical  or other  information  (including  copies of  Licensed
Patents).

7.6 Neither party shall have any obligation hereunder to institute any action or
suit against third parties for infringement of any of its Licensed Patents or to
defend any action or suit brought by a third party which  challenges or concerns
the validity of any of its Licensed Patents.  Neither party shall have any right
to institute any action or suit against third parties for infringement of any of
the other party's Licensed Patents.  Neither party, nor any of its Subsidiaries,
is  required to file any patent  application,  or to secure any patent or patent
rights, or to maintain any patent in force.

7.7  Each  party  shall,  upon a  request  from  the  other  party  sufficiently
identifying any patent or patent  application,  inform the other party as to the
extent to which said patent or patent application is subject to the licenses and
other  rights  granted  hereunder.  If such  licenses or other rights under said
patent or patent  application  are restricted in scope,  copies of all pertinent
provisions  of any  contract or other  arrangement  creating  such  restrictions
shall, upon request, be furnished to the party making such request,  unless such
disclosure is prevented by such contract,  and in such event, a statement of the
nature of such restriction shall be provided.

7.8  If a third party has the right to grant licenses  under a patent to a party
hereto (as a "Licensee") with the consent of the other party hereto,  said other
party shall  provide  said third party with any consent  required to enable said
third party to license said Licensee on whatever terms such third party may deem
appropriate. Each party hereby waives any right it may have to receive royalties
or other  consideration  from said third party as a result of said third party's
so  licensing  said  Licensee  within the scope of the  licenses  granted  under
Section 2 of this Agreement.

7.9  This  Agreement shall not be  binding  upon the  parties  until it has been
signed  hereinbelow by or on behalf of each party.  No amendment or modification
hereof  shall be valid or binding  upon the  parties  unless made in writing and
signed as aforesaid.

                                       14

<PAGE>


7.10  If any section of this  Agreement is found by  competent  authority  to be
invalid,  illegal or unenforceable in any respect for any reason,  the validity,
legality  and  enforceability  of such  section in every  other  respect and the
remainder of this  Agreement  shall  continue in effect so long as the Agreement
still expresses the intent of the parties. However, if the intent of the parties
cannot be preserved, this Agreement shall be either renegotiated or terminated.

7.11  This  Agreement  shall be construed, and the legal  relations  between the
parties hereto shall be determined,  in accordance  with the law of the State of
New York,  USA, as such law applies to contracts  signed and fully  performed in
New York.

7.12 The headings of sections are inserted for convenience of reference only and
are not intended to be a part of or to affect the meaning or  interpretation  of
this Agreement.

7.13  This Agreement supersedes the Patent License  Agreement  dated as of March
10, 1986 between IBM and QUANTUM,  except for patent licenses  granted under the
March 10, 1986  agreement  which are more extensive in scope or in duration than
the licenses  granted  under this  Agreement,  and those patent  licenses  shall
remain in force and effect under the terms and  conditions of the March 10, 1986
agreement.

This Agreement embodies the entire  understanding of the parties with respect to
the Licensed  Patents,  and  replaces  any prior oral or written  communications
between them.

Agreed to:                                    Agreed to:
QUANTUM CORPORATION                           INTERNATIONAL BUSINESS
                                              MACHINES CORPORATION

By:  /s/ Gerard Schenkkan                     By:  /s/ M.C. Phelps, Jr.
     --------------------------                    -----------------------------
         T. Schenkkan                                  M.C. Phelps, Jr.
         Vice President                                Vice President
         Corporate Development

                                       15



                                                                    EXHIBIT 11.1
                              QUANTUM CORPORATION
                       COMPUTATION OF NET INCOME PER SHARE
                      (In thousands except per share data)

                                                        Three Months Ended
                                                   June 29,          June 30,
                                                    1997              1996
                                                  -------            -------
PRIMARY
Weighted average number of common
      shares during the period                    131,805            110,922
Incremental common shares attributable                              
      to exercise of outstanding options            9,076              4,770
                                                  -------            -------
                                                                    
Total shares                                      140,881            115,692
                                                                    
Net Income                                         96,514              3,843
                                                                    
Net income per share                                 0.69               0.03
                                                  -------            -------
                                                                    
FULLY DILUTED                                                       
Weighted average number of common                                   
      shares during the period                    131,806            110,924
Incremental common shares attributable                              
      to exercise of outstanding options and                        
      conversion of 6 3/8% convertible                              
      subordinated debentures and 5%                                
      convertible subordinated notes                9,079             39,464
                                                  -------            -------
                                                                    
Total shares                                      140,885            150,388
                                                                    
Net income:                                                         
      Net income                                   96,514              3,843
      Add 6 3/8% convertible subordinated                           
          debentures and 5% convertible                             
          subordinated notes interest,                              
          net of income tax effect                      0              3,627
                                                  -------            -------
                                                                    
Net income, as adjusted                            96,514              7,470
                                                                    
Net income per share                                 0.69               0.05*
                                                  -------            -------
                                                                    
                                                              
*     The primary net income per share is shown in the  statements  of income as
      both primary and fully diluted, as the effect of the assumed conversion of
      the subordinated debentures is anti-dilutive.


                                                                              26

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
         THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
         FINANCIAL  STATEMENTS OF QUANTUM CORPORATION FOR THE QUARTER ENDED JUNE
         29, 1997
</LEGEND>
<MULTIPLIER>                  1,000
       
<S>                                       <C>
<PERIOD-TYPE>                             3-MOS
<FISCAL-YEAR-END>                                  MAR-31-1998
<PERIOD-END>                                       JUN-29-1997
<CASH>                                             365,973
<SECURITIES>                                             0
<RECEIVABLES>                                      897,928
<ALLOWANCES>                                        10,539
<INVENTORY>                                        295,251
<CURRENT-ASSETS>                                 1,720,617
<PP&E>                                             409,802
<DEPRECIATION>                                     177,957
<TOTAL-ASSETS>                                   2,113,430
<CURRENT-LIABILITIES>                              797,432
<BONDS>                                            282,044
                                3,888
                                              0
<COMMON>                                           472,896
<OTHER-SE>                                         522,906
<TOTAL-LIABILITY-AND-EQUITY>                     2,113,430
<SALES>                                          1,446,144
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