NSTOR TECHNOLOGIES INC
S-3, EX-4, 2000-06-07
NON-OPERATING ESTABLISHMENTS
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                                                        EXHIBIT 4.1

NEITHER  THIS WARRANT NOR THE SHARES  ISSUABLE  UPON  EXERCISE  HEREOF HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT")
OR ANY OTHER  APPLICABLE  SECURITIES LAWS IN RELIANCE UPON AN EXEMPTION FROM THE
REGISTRATION  REQUIREMENTS OF THE SECURITIES ACT AND SUCH OTHER SECURITIES LAWS.
NEITHER THIS WARRANT NOR THE SHARES  ISSUABLE UPON EXERCISE  HEREOF MAY BE SOLD,
PLEDGED, TRANSFERRED,  ENCUMBERED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN
EFFECTIVE  REGISTRATION  STATEMENT  UNDER THE SECURITIES ACT OR IN A TRANSACTION
WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF THE SECURITIES ACT.

                             STOCK PURCHASE WARRANT

                  To Purchase 100,000 Shares of Common Stock of

                            nSTOR TECHNOLOGIES, INC.

          THIS CERTIFIES  that,  for value  received,  Wishmasters  Limited (the
"Holder"), is entitled, upon the terms and subject to the conditions hereinafter
set forth,  at any time on or after the date which is the earlier of  forty-five
(45) days after the effective date of the Registration  Statement or one hundred
twenty  (120) days from the  Closing  Date (the  "Commencement  Date") and on or
prior to the close of business on May 9, 2003 (the  "Termination  Date") but not
thereafter,  to subscribe  for and  purchase  from nStor  Technologies,  Inc., a
Delaware  corporation  (the  "Company"),  up to One Hundred  Thousand  (100,000)
shares (the "Warrant  Shares") of Common Stock,  $.05 par value,  of the Company
(the  "Common  Stock").  The  purchase  price of one share of Common  Stock (the
"Exercise  Price") under this Warrant shall be $3.60 (120% of the average of the
closing  prices of the Common Stock on the 5 Trading Days  immediately  prior to
the Closing  Date).  The  Exercise  Price and the number of shares for which the
Warrant is exercisable shall be subject to adjustment as provided herein. In the
event of any  conflict  between the terms of this  Warrant and the Common  Stock
Purchase  Agreement  dated May 4th, 2000 pursuant to which this Warrant has been
issued  (the  "Purchase  Agreement"),  the  Purchase  Agreement  shall  control.
Capitalized  terms used and not otherwise defined herein shall have the meanings
set forth for such terms in the Purchase Agreement.

1.   [INTENTIONALLY DELETED]

2.  Authorization  of Shares.  The Company  covenants  that all shares of Common
Stock  which may be issued  upon the  exercise  of  rights  represented  by this
Warrant will, upon exercise of the rights  represented by this Warrant,  be duly
authorized,  validly  issued,  fully  paid and  nonassessable  and free from all
taxes,  liens and charges in respect of the issue  thereof  (other than taxes in
respect of any transfer occurring contemporaneously with such issue).

3. Exercise of Warrant.  Except as provided in Section 4 herein, exercise of the
purchase rights  represented by this Warrant may be made at any time or times on
or after the  Issuance  Date  hereof  and before  the close of  business  on the
Termination  Date  hereof.  Exercise of this Warrant or any part hereof shall be
effected  by the  surrender  of this  Warrant  and the Notice of  Exercise  Form
annexed hereto duly executed, at the office of the Company (or such other office
or agency of the  Company  as it may  designate  by  notice  in  writing  to the
registered holder hereof at the address of such holder appearing on the books of
the  Company)  and upon  payment of the  Exercise  Price of the  shares  thereby
purchased by wire transfer or cashier's check drawn on a United States bank, the
holder of this Warrant shall be entitled to receive a certificate for the number
of  shares of Common  Stock so  purchased.  Certificates  for  shares  purchased
hereunder  shall be delivered to the holder hereof within three (3) Trading Days
after the date on which this Warrant  shall have been  exercised  as  aforesaid.
This Warrant  shall be deemed to have been  exercised  and such  certificate  or
certificates shall be deemed to have been issued, and Holder or any other person
so  designated  to be named  therein  shall be deemed to have become a holder of
record of such  shares for all  purposes,  as of the date the  Warrant  has been
exercised by payment to the Company of the Exercise Price and all taxes required
to be paid by Holder,  if any,  pursuant  to Section 5 prior to the  issuance of
such shares,  have been paid. If this Warrant shall have been exercised in part,
the Company shall,  at the time of delivery of the  certificate or  certificates
representing  Warrant  Shares,  deliver to Holder a new Warrant  evidencing  the
rights of Holder to purchase the  unpurchased  shares of Common Stock called for
by this Warrant, which new Warrant shall in all other respects be identical with
this  Warrant.  This  Warrant  may also be  exercised  by  means of a  "cashless
exercise" in which the holder shall be entitled to receive a certificate for the
number of shares equal to the quotient  obtained by dividing [(A-B) (X)] by (A),
where:

(A) = the average of the high and low trading prices per share of Common
Stock on the Trading Day preceding the date of such election;

(B) =  the Exercise Price of the Warrants; and

(X) = the number of shares  issuable upon exercise of the Warrants in accordance
with the terms of this Warrant.

4. No Fractional  Shares or Scrip.  No fractional  shares or scrip  representing
fractional  shares shall be issued upon the exercise of this Warrant.  As to any
fraction of a share which  Holder would  otherwise be entitled to purchase  upon
such exercise, the Company shall pay a cash adjustment (which may be effected as
a reduction  of the amount paid by the Holder upon such  exercise) in respect of
such final fraction in an amount equal to the Exercise Price.

5. Charges,  Taxes and Expenses.  Issuance of certificates  for shares of Common
Stock upon the  exercise of this  Warrant  shall be made  without  charge to the
holder  hereof  for any issue or  transfer  tax or other  incidental  expense in
respect of the  issuance of such  certificate,  all of which taxes and  expenses
shall be paid by the Company,  and such certificates shall be issued in the name
of the holder of this Warrant or in such name or names as may be directed by the
holder of this Warrant;  provided,  however,  that in the event certificates for
shares of Common  Stock  are to be issued in a name  other  than the name of the
holder of this  Warrant,  this Warrant when  surrendered  for exercise  shall be
accompanied by the Assignment  Form attached  hereto duly executed by the holder
hereof; and the Company may require,  as a condition  thereto,  the payment of a
sum  sufficient  to reimburse it for any transfer  tax  incidental  thereto.

6. Closing of Books. The Company will not close its shareholder books or records
in any manner which prevents the timely exercise of this Warrant.

7. Transfer, Division and Combination. The Holder acknowledges that this Warrant
and the Warrant  Shares have not been  registered  under the  Securities  Act or
applicable state law. The Holder agrees, by acceptance of this Warrant, (i) that
no sale, transfer or distribution of this Warrant or the Warrant Shares shall be
made except in compliance  with the Securities Act and the rules and regulations
promulgated thereunder, including, without limitation, any applicable prospectus
delivery  requirements  and (ii) that if  distribution  of this  Warrant  or any
Warrant  Shares is  proposed  to be made by it  otherwise  than by delivery of a
prospectus  meeting the  requirements  of Section 10 of the Securities Act, such
action  shall be taken only  after  submission  to the  Company of an opinion of
counsel,  reasonably  satisfactory  in  form  and  substances  to the  Company's
counsel,  to the effect that the proposed  distribution will not be in violation
of the  Securities  Act or  applicable  state  law.  If the  Company  reasonably
determines that the proposed  assignment is permitted pursuant to the provisions
hereof,  upon  surrender  by the Holder of this  Warrant  to the  Company at its
principal  office with the Assignment Form attached  hereto duly completed,  the
Company shall  register the  assignment  of this Warrant in accordance  with the
information  contained  in the  Assignment  Form and  execute  and deliver a new
Warrant or  Warrants  in the name of the  assignee  or  assignees  named in such
Assignment  Form (and,  if  applicable,  a new Warrant in the name of the Holder
evidencing  any  remaining  portion of the  Warrant not  theretofore  exercised,
transferred or assigned) and this Warrant shall promptly be canceled. Conditions
to the  transfer  of this  Warrant  or any  portion  thereof  shall  be that the
proposed  transferee  deliver to the  Company his or its  written  agreement  to
accept and be bound by all of the terms and conditions of this Warrant. The term
"Warrant" as used herein  includes  any Warrants  into which this Warrant may be
divided or exchanged.

                (b) This Warrant may be divided or combined with other  Warrants
upon presentation hereof at the aforesaid office of the Company, together with a
written notice  specifying the names and denominations in which new Warrants are
to be issued,  signed by Holder or its agent or attorney.  Subject to compliance
with Section 7(a), as to any transfer  which may be involved in such division or
combination,  the Company shall execute and deliver a new Warrant or Warrants in
exchange  for the Warrant or  Warrants  to be divided or combined in  accordance
with such notice.

                (c) The  Company  shall  prepare,  issue and  deliver at its own
expense  (other than  transfer  taxes) the new  Warrant or  Warrants  under this
Section 7.

                (d) The Company  agrees to maintain,  at its  aforesaid  office,
books for the registration and the registration of transfer of the Warrants.

8. No Rights as Shareholder  until  Exercise.  This Warrant does confer upon the
Holder any rights as a shareholder  of the Company,  either at law or in equity.
The rights of the Holder are limited to those  expressed  herein and the Holder,
by acceptance  hereof,  consents to and agrees to be bound by and to comply with
all the provisions of this Warrant.  Each Holder, by acceptance of this Warrant,
agrees  that the Company  and its  transfer  agent,  if any,  may,  prior to any
presentation of this Warrant for  registration  of transfer,  deem and treat the
person in whose name this Warrant is registered as the absolute, true and lawful
owner of this  Warrant for all purposes  whatsoever  and neither the Company nor
any transfer agent shall be affected by any notice to the contrary.

9. Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that
upon  receipt by the Company of evidence  reasonably  satisfactory  to it of the
loss, theft,  destruction or mutilation of this Warrant certificate or any stock
certificate  relating  to the  Warrant  Shares,  and in case of  loss,  theft or
destruction, of indemnity or security reasonably satisfactory to it (which shall
not include the posting of any bond),  and upon  surrender and  cancellation  of
such  Warrant or stock  certificate,  if  mutilated,  the Company  will make and
deliver a new  Warrant or stock  certificate  of like tenor and dated as of such
cancellation,  in lieu of such  Warrant  or stock  certificate.

10.  Saturdays,Sundays,  Holidays,  etc.  If the last or  appointed  day for the
taking of any action or the  expiration of any right  required or granted herein
shall be a Saturday, Sunday or a legal holiday, then such action may be taken or
such right may be exercised on the next succeeding day not a Saturday, Sunday or
legal holiday.

11.  Adjustments  of  Exercise  Price and  Number of Warrant  Shares.  (a) Stock
Splits, etc. The number and kind of securities  purchasable upon the exercise of
this Warrant and the Exercise Price shall be subject to adjustment  from time to
time upon the happening of any of the  following.  In case the Company shall (i)
pay a dividend  in shares of Common  Stock or make a  distribution  in shares of
Common Stock to holders of its  outstanding  Common  Stock,  (ii)  subdivide its
outstanding  shares of Common  Stock  into a greater  number of shares of Common
Stock,  (iii)  combine  its  outstanding  shares of Common  Stock into a smaller
number of shares of Common  Stock or (iv) issue any shares of its capital  stock
in a  reclassification  of the Common Stock,  then the number of Warrant  Shares
purchasable  upon  exercise of this Warrant  immediately  prior thereto shall be
adjusted  so that the holder of this  Warrant  shall be  entitled to receive the
kind and number of Warrant  Shares or other  securities  of the Company which he
would  have  owned or have  been  entitled  to  receive  had such  Warrant  been
exercised in advance  thereof.  Upon each such adjustment of the kind and number
of Warrant  Shares or other  securities  of the  Company  which are  purchasable
hereunder,  the holder of this Warrant shall  thereafter be entitled to purchase
the number of Warrant Shares or other securities  resulting from such adjustment
at an Exercise Price per Warrant Share or other security obtained by multiplying
the Exercise Price in effect  immediately prior to such adjustment by the number
of  Warrant  Shares  purchasable  pursuant  hereto  immediately  prior  to  such
adjustment and dividing by the number of Warrant  Shares or other  securities of
the Company resulting from such adjustment.  An adjustment made pursuant to this
paragraph shall become  effective  immediately  after the effective date of such
event retroactive to the record date, if any, for such event.

(b) Reorganization,  Reclassification,  Merger,  Consolidation or Disposition of
Assets. In case the Company shall reorganize its capital, reclassify its capital
stock, consolidate or merge with or into another corporation,  or sell, transfer
or  otherwise  dispose  of all or  substantially  all its  property,  assets  or
business   to  another   corporation   and,   pursuant  to  the  terms  of  such
reorganization,   reclassification,  merger,  consolidation  or  disposition  of
assets, shares of common stock of the successor or acquiring corporation, or any
cash,  shares of stock or other securities or property of any nature  whatsoever
(including  warrants or other subscription or purchase rights) in addition to or
in lieu of  common  stock of the  successor  or  acquiring  corporation  ("Other
Property"),  are to be received by or distributed to the holders of Common Stock
of the Company,  then Holder shall have the right  thereafter  to receive,  upon
exercise of this Warrant,  the number of shares of common stock of the successor
or acquiring corporation or of the Company, if it is the surviving  corporation,
and  Other  Property  receivable  upon or as a  result  of such  reorganization,
reclassification,  merger, consolidation or disposition of assets by a holder of
the  number of shares of Common  Stock for which  this  Warrant  is  exercisable
immediately   prior  to  such  event.  In  case  of  any  such   reorganization,
reclassification,  merger, consolidation or disposition of assets, the successor
or acquiring  corporation (if other than the Company) shall expressly assume the
due and  punctual  observance  and  performance  of each and every  covenant and
condition of this  Warrant to be  performed  and observed by the Company and all
the obligations and liabilities hereunder,  subject to such modifications as may
be deemed appropriate (as determined in good faith by resolution of the Board of
Directors  of the  Company)  in order to provide  for  adjustments  of shares of
Common  Stock for which this  Warrant is  exercisable  which  shall be as nearly
equivalent as  practicable to the  adjustments  provided for in this Section 11.
For purposes of this  Section 11,  "common  stock of the  successor or acquiring
corporation"  shall include stock of such  corporation of any class which is not
preferred  as to  dividends  or  assets  over any  other  class of stock of such
corporation  and which is not subject to  redemption  and shall also include any
evidences  of  indebtedness,  shares  of  stock or other  securities  which  are
convertible into or exchangeable for any such stock,  either immediately or upon
the arrival of a specified  date or the  happening of a specified  event and any
warrants  or other  rights to  subscribe  for or purchase  any such  stock.  The
foregoing  provisions  of this Section 11 shall  similarly  apply to  successive
reorganizations,  reclassifications,  mergers,  consolidations or disposition of
assets.

12. Voluntary  Adjustment by the Company. The Company may at any time during the
term of this Warrant,  reduce the then current  Exercise Price to any amount and
for any  period of time  deemed  appropriate  by the Board of  Directors  of the
Company.

13.  Notice of  Adjustment.  Whenever the number of Warrant  Shares or number or
kind of  securities  or other  property  purchasable  upon the  exercise of this
Warrant or the Exercise Price is adjusted, as herein provided, the Company shall
promptly mail by registered or certified mail, return receipt requested,  to the
holder of this Warrant notice of such  adjustment or  adjustments  setting forth
the number of Warrant Shares (and other securities or property) purchasable upon
the exercise of this Warrant and the Exercise  Price of such Warrant Shares (and
other  securities  or property)  after such  adjustment,  setting  forth a brief
statement  of  the  facts  requiring  such  adjustment  and  setting  forth  the
computation by which such  adjustment was made.  Such notice,  in the absence of
manifest  error,  shall  be  conclusive  evidence  of the  correctness  of  such
adjustment.

14.  Notice of Corporate Action.  If at any time:

                (a) the Company shall take a record of the holders of its Common
Stock  for the  purpose  of  entitling  them to  receive  a  dividend  or  other
distribution,  or any right to subscribe  for or purchase  any  evidences of its
indebtedness,  any  shares  of stock of any  class or any  other  securities  or
property, or to receive any other right, or

                (b) there shall be any capital  reorganization  of the  Company,
any  reclassification or recapitalization of the capital stock of the Company or
any consolidation or merger of the Company with, or any sale,  transfer or other
disposition of all or substantially all the property,  assets or business of the
Company to, another corporation or,

                (c)   there  shall be a voluntary or  involuntary
dissolution, liquidation or winding up of the Company;

then, in any one or more of such cases,  the Company shall give to Holder (i) at
least 30 days' prior written  notice of the date on which a record date shall be
selected for such dividend,  distribution or right or for determining  rights to
vote  in  respect  of  any  such   reorganization,   reclassification,   merger,
consolidation, sale, transfer, disposition,  liquidation or winding up, and (ii)
in the case of any such reorganization, reclassification, merger, consolidation,
sale, transfer, disposition, dissolution, liquidation or winding up, at least 30
days'  prior  written  notice of the date when the same shall take  place.  Such
notice in accordance  with the foregoing  clause also shall specify (i) the date
on which  any such  record  is to be taken  for the  purpose  of such  dividend,
distribution  or right,  the date on which the holders of Common  Stock shall be
entitled  to any such  dividend,  distribution  or  right,  and the  amount  and
character  thereof,  and  (ii)  the  date  on  which  any  such  reorganization,
reclassification,    merger,   consolidation,   sale,   transfer,   disposition,
dissolution,  liquidation  or winding  up is to take place and the time,  if any
such  time is to be fixed,  as of which the  holders  of Common  Stock  shall be
entitled  to  exchange  their  shares of Common  Stock for  securities  or other
property deliverable upon such disposition,  dissolution, liquidation or winding
up. Each such written notice shall be sufficiently  given if addressed to Holder
at the  last  address  of  Holder  appearing  on the  books of the  Company  and
delivered in accordance with Section 16(d).

15. Authorized  Shares. The Company covenants that during the period the Warrant
is outstanding,  it will reserve from its authorized and unissued Common Stock a
sufficient  number of shares to provide for the  issuance of the Warrant  Shares
upon the exercise of any purchase rights under this Warrant. The Company further
covenants that its issuance of this Warrant shall  constitute  full authority to
its officers who are charged with the duty of executing  stock  certificates  to
execute and issue the  necessary  certificates  for the Warrant  Shares upon the
exercise of the purchase  rights under this  Warrant.  The Company will take all
such  reasonable  action as may be necessary to assure that such Warrant  Shares
may be issued as provided  herein  without  violation of any  applicable  law or
regulation, or of any requirements of the Principal Market upon which the Common
Stock may be listed.

                The  Company  shall  not  by  any  action,  including,   without
limitation,   amending  its   certificate  of   incorporation   or  through  any
reorganization, transfer of assets, consolidation, merger, dissolution, issue or
sale of securities  or any other  voluntary  action,  avoid or seek to avoid the
observance or performance  of any of the terms of this Warrant,  but will at all
times in good  faith  assist in the  carrying  out of all such  terms and in the
taking of all such  actions as may be necessary  or  appropriate  to protect the
rights of Holder  against  impairment.  Without  limiting the  generality of the
foregoing,  the  Company  will (a) not  increase  the par value of any shares of
Common  Stock  receivable  upon the  exercise of this  Warrant  above the amount
payable  therefor upon such exercise  immediately  prior to such increase in par
value, (b) take all such action as may be necessary or appropriate in order that
the Company may validly and legally issue fully paid and nonassessable shares of
Common Stock upon the  exercise of this  Warrant,  and (c) use all  commercially
reasonable  efforts to obtain all such  authorizations,  exemptions  or consents
from any public regulatory body having jurisdiction  thereof as may be necessary
to enable the Company to perform its obligations under this Warrant.

                Before  taking  any  action  which  would  cause  an  adjustment
reducing  the current  Exercise  Price below the then par value,  if any, of the
shares of Common Stock issuable upon exercise of the Warrants, the Company shall
take any  corporate  action which may be necessary in order that the Company may
validly and legally  issue fully paid and  non-assessable  shares of such Common
Stock at such adjusted Exercise Price.

                Before  taking any action which would result in an adjustment in
the number of shares of Common Stock for which this Warrant is exercisable or in
the  Exercise  Price,  the  Company  shall  obtain  all such  authorizations  or
exemptions  thereof,  or consents  thereto,  as may be necessary from any public
regulatory body or bodies having jurisdiction thereof.

16.  Miscellaneous.

(a)  Jurisdiction.  This Warrant shall be binding upon any successors or assigns
of the Company.  This  Warrant  shall  constitute  a contract  under the laws of
Delaware  without  regard to its  conflict of law  principles  or rules,  and be
subject  to  arbitration  pursuant  to the  terms  set  forth  in  the  Purchase
Agreement.

(b)  Restrictions.  The  holder  hereof  acknowledges  that the  Warrant  Shares
acquired  upon the  exercise  of this  Warrant,  if not  registered,  will  have
restrictions upon resale imposed by state and federal securities laws.

(c)  Nonwaiver  and  Expenses.  No course of  dealing or any delay or failure to
exercise any right  hereunder on the part of Holder shall operate as a waiver of
such  right  or  otherwise  prejudice  Holder's  rights,   powers  or  remedies,
notwithstanding  all rights hereunder  terminate on the Termination Date hereof.
If the Company  willfully  fails to comply with any  material  provision of this
Warrant,  the Company shall pay to Holder such amounts as shall be sufficient to
cover  any  costs  and  expenses  including,  but  not  limited  to,  reasonable
attorneys' fees, including those of appellate proceedings, incurred by Holder in
collecting any amounts due pursuant hereto or in otherwise  enforcing any of its
rights, powers or remedies hereunder.

(d) Notices.  Any notice,  request or other document required or permitted to be
given or  delivered  to the holder  hereof by the Company  shall be delivered in
accordance with the notice provisions of the Purchase Agreement.

(e) Limitation of Liability.  No provision hereof, in the absence of affirmative
action by Holder to purchase shares of Common Stock,  and no enumeration  herein
of the rights or privileges of Holder  hereof,  shall give rise to any liability
of Holder for the purchase  price of any Common Stock or as a stockholder of the
Company,  whether  such  liability is asserted by the Company or by creditors of
the Company.

(f)  Remedies.  Holder,  in  addition to being  entitled to exercise  all rights
granted by law,  including  recovery  of  damages,  will be entitled to specific
performance  of its rights under this Warrant.  The Company agrees that monetary
damages would not be adequate  compensation for any loss incurred by reason of a
breach by it of the  provisions  of this Warrant and hereby  agrees to waive the
defense  in any action for  specific  performance  that a remedy at law would be
adequate.

(g) Successors and Assigns.  Subject to applicable securities laws, this Warrant
and the rights and  obligations  evidenced  hereby shall inure to the benefit of
and be  binding  upon the  successors  of the  Company  and the  successors  and
permitted  assigns of Holder.  The provisions of this Warrant are intended to be
for the  benefit of all Holders  from time to time of this  Warrant and shall be
enforceable by any such Holder or holder of Warrant Shares.

(h)  Amendment.  This Warrant may be modified or amended or the
provisions hereof waived with the written consent of the Company
and the Holder.

(i)  Severability.  Wherever  possible,  each provision of this Warrant shall be
interpreted  in such manner as to be effective and valid under  applicable  law,
but if any  provision of this Warrant  shall be  prohibited  by or invalid under
applicable  law,  such  provision  shall be  ineffective  to the  extent of such
prohibition or invalidity, without invalidating the remainder of such provisions
or the remaining provisions of this Warrant.

(j)  Headings.  The  headings  used in this Warrant are for the  convenience  of
reference only and shall not, for any purpose, be deemed a part of this Warrant.

          IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its officer thereunto duly authorized.

Dated: May 4, 2000
                         NSTOR TECHNOLOGIES, INC.

                         By:  /s/  H. Irwin Levy
                               H. Irwin Levy, Chairman


                               NOTICE OF EXERCISE

To:  nStor Technologies, Inc.



          (1) The  undersigned  hereby  elects to  purchase  ________  shares of
Common Stock (the "Common Stock"), of nStor  Technologies,  Inc. pursuant to the
terms of the  attached  Warrant,  and tenders  herewith  payment of the exercise
price in full, together with all applicable transfer taxes, if any.

          (2) Please  issue a  certificate  or  certificates  representing  said
shares of Common Stock in the name of the  undersigned  or in such other name as
is specified below:

               -------------------------------
               (Name)

               -------------------------------
               (Address)
               -------------------------------


Dated:


                                   ------------------------------
                                   Signature

                             ASSIGNMENT FORM

         (To assign the foregoing warrant, execute this form and supply
                              required information.

                 Do not use this form to exercise the warrant.)

          FOR  VALUE  RECEIVED,  the foregoing  Warrant  and  all  rights
evidenced thereby are hereby assigned to


_______________________________________________ whose address is

---------------------------------------------------------------.

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

                                Dated:  ______________, _______


               Holder's Signature: _____________________________

               Holder's Address:   _____________________________

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



Signature Guaranteed:  ___________________________________________


NOTE: The signature to this  Assignment Form must correspond with the name as it
appears on the face of the Warrant,  without  alteration or  enlargement  or any
change whatsoever,  and must be guaranteed by a bank or trust company.  Officers
of  corporations  and  those  acting  in an  fiduciary  or other  representative
capacity  should  file  proper  evidence of  authority  to assign the  foregoing
Warrant.


                                                Exhibit 4.2


NEITHER  THIS WARRANT NOR THE SHARES  ISSUABLE  UPON  EXERCISE  HEREOF HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT")
OR ANY OTHER  APPLICABLE  SECURITIES LAWS IN RELIANCE UPON AN EXEMPTION FROM THE
REGISTRATION  REQUIREMENTS OF THE SECURITIES ACT AND SUCH OTHER SECURITIES LAWS.
NEITHER THIS WARRANT NOR THE SHARES  ISSUABLE UPON EXERCISE  HEREOF MAY BE SOLD,
PLEDGED, TRANSFERRED,  ENCUMBERED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN
EFFECTIVE  REGISTRATION  STATEMENT  UNDER THE SECURITIES ACT OR IN A TRANSACTION
WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF THE SECURITIES ACT.

                             STOCK PURCHASE WARRANT

                  To Purchase 120,000 Shares of Common Stock of

                            nSTOR TECHNOLOGIES, INC.

          THIS CERTIFIES  that,  for value  received,  Ladenburg  Thalmann & Co.
Inc., (the "Holder"),  is entitled, upon the terms and subject to the conditions
hereinafter set forth, at any time on or after May 9, 2000 (the "Issuance Date")
and on or prior to the close of business on May 9, 2003 (the "Termination Date")
but not thereafter, to subscribe for and purchase from nStor Technologies, Inc.,
a Delaware  corporation  (the  "Company"),  up to one  hundred  twenty  thousand
(120,000) shares (the "Warrant Shares") of Common Stock, $0.05 par value, of the
Company (the "Common  Stock").  The purchase  price of one share of Common Stock
(the "Exercise Price") under this Warrant shall be $3.60 (120% of the average of
the closing prices of the Common Stock on the five (5) trading days  immediately
preceding  the  initial  closing  date  of the  certain  Common  Stock  Purchase
Agreement,  dated May 4,  2000,  by and  between  the  Company  and  Wishmasters
Limited).  The Exercise  Price and the number of shares for which the Warrant is
exercisable shall be subject to adjustment as provided herein.

1.   [INTENTIONALLY DELETED]

2.  Authorization  of Shares.  The Company  covenants  that all shares of Common
Stock  which may be issued  upon the  exercise  of  rights  represented  by this
Warrant will, upon exercise of the rights  represented by this Warrant,  be duly
authorized,  validly  issued,  fully  paid and  nonassessable  and free from all
taxes,  liens and charges in respect of the issue  thereof  (other than taxes in
respect of any transfer occurring contemporaneously with such issue).

3. Exercise of Warrant.  Except as provided in Section 4 herein, exercise of the
purchase rights  represented by this Warrant may be made at any time or times on
or after the  Issuance  Date  hereof  and before  the close of  business  on the
Termination  Date  hereof.  Exercise of this Warrant or any part hereof shall be
effected  by the  surrender  of this  Warrant  and the Notice of  Exercise  Form
annexed hereto duly executed, at the office of the Company (or such other office
or agency of the  Company  as it may  designate  by  notice  in  writing  to the
registered holder hereof at the address of such holder appearing on the books of
the  Company)  and upon  payment of the  Exercise  Price of the  shares  thereby
purchased by wire transfer or cashier's check drawn on a United States bank, the
holder of this Warrant shall be entitled to receive a certificate for the number
of  shares of Common  Stock so  purchased.  Certificates  for  shares  purchased
hereunder  shall be delivered to the holder hereof within three (3) Trading Days
after the date on which this Warrant  shall have been  exercised  as  aforesaid.
This Warrant  shall be deemed to have been  exercised  and such  certificate  or
certificates shall be deemed to have been issued, and Holder or any other person
so  designated  to be named  therein  shall be deemed to have become a holder of
record of such  shares for all  purposes,  as of the date the  Warrant  has been
exercised by payment to the Company of the Exercise Price and all taxes required
to be paid by Holder,  if any,  pursuant  to Section 5 prior to the  issuance of
such shares,  have been paid. If this Warrant shall have been exercised in part,
the Company shall,  at the time of delivery of the  certificate or  certificates
representing  Warrant  Shares,  deliver to Holder a new Warrant  evidencing  the
rights of Holder to purchase the  unpurchased  shares of Common Stock called for
by this Warrant, which new Warrant shall in all other respects be identical with
this  Warrant.  This  Warrant  may also be  exercised  by  means of a  "cashless
exercise" in which the holder shall be entitled to receive a certificate for the
number of shares equal to the quotient  obtained by dividing [(A-B) (X)] by (A),
where:

(A) = the average of the high and low trading  prices per share of Common  Stock
on the Trading Day preceding the date of such election;

(B) =  the Exercise Price of the Warrants; and

(X) = the number of shares  issuable upon exercise of the Warrants in accordance
with the terms of this Warrant.

4. No Fractional  Shares or Scrip.  No fractional  shares or scrip  representing
fractional  shares shall be issued upon the exercise of this Warrant.  As to any
fraction of a share which  Holder would  otherwise be entitled to purchase  upon
such exercise, the Company shall pay a cash adjustment (which may be effected as
a reduction  of the amount paid by the Holder upon such  exercise) in respect of
such final fraction in an amount equal to the Exercise Price.

5. Charges,  Taxes and Expenses.  Issuance of certificates  for shares of Common
Stock upon the  exercise of this  Warrant  shall be made  without  charge to the
holder  hereof  for any issue or  transfer  tax or other  incidental  expense in
respect of the  issuance of such  certificate,  all of which taxes and  expenses
shall be paid by the Company,  and such certificates shall be issued in the name
of the holder of this Warrant or in such name or names as may be directed by the
holder of this Warrant;  provided,  however,  that in the event certificates for
shares of Common  Stock  are to be issued in a name  other  than the name of the
holder of this  Warrant,  this Warrant when  surrendered  for exercise  shall be
accompanied by the Assignment  Form attached  hereto duly executed by the holder
hereof; and the Company may require,  as a condition  thereto,  the payment of a
sum  sufficient  to reimburse it for any transfer  tax  incidental  thereto.

6. Closing of Books. The Company will not close its shareholder books or records
in any manner which prevents the timely exercise of this Warrant.

7. Transfer, Division and Combination. The Holder acknowledges that this Warrant
and the Warrant  Shares have not been  registered  under the  Securities  Act or
applicable state law. The Holder agrees, by acceptance of this Warrant, (i) that
no sale, transfer or distribution of this Warrant or the Warrant Shares shall be
made except in compliance  with the Securities Act and the rules and regulations
promulgated thereunder, including, without limitation, any applicable prospectus
delivery  requirements  and (ii) that if  distribution  of this  Warrant  or any
Warrant  Shares is  proposed  to be made by it  otherwise  than by delivery of a
prospectus  meeting the  requirements  of Section 10 of the Securities Act, such
action  shall be taken only  after  submission  to the  Company of an opinion of
counsel,  reasonably  satisfactory  in  form  and  substances  to the  Company's
counsel,  to the effect that the proposed  distribution will not be in violation
of the  Securities  Act or  applicable  state  law.  If the  Company  reasonably
determines that the proposed  assignment is permitted pursuant to the provisions
hereof,  upon  surrender  by the Holder of this  Warrant  to the  Company at its
principal  office with the Assignment Form attached  hereto duly completed,  the
Company shall  register the  assignment  of this Warrant in accordance  with the
information  contained  in the  Assignment  Form and  execute  and deliver a new
Warrant or  Warrants  in the name of the  assignee  or  assignees  named in such
Assignment  Form (and,  if  applicable,  a new Warrant in the name of the Holder
evidencing  any  remaining  portion of the  Warrant not  theretofore  exercised,
transferred or assigned) and this Warrant shall promptly be canceled. Conditions
to the  transfer  of this  Warrant  or any  portion  thereof  shall  be that the
proposed  transferee  deliver to the  Company his or its  written  agreement  to
accept and be bound by all of the terms and conditions of this Warrant. The term
"Warrant" as used herein  includes  any Warrants  into which this Warrant may be
divided or exchanged.

                (b) This Warrant may be divided or combined with other  Warrants
upon presentation hereof at the aforesaid office of the Company, together with a
written notice  specifying the names and denominations in which new Warrants are
to be issued,  signed by Holder or its agent or attorney.  Subject to compliance
with Section 7(a), as to any transfer  which may be involved in such division or
combination,  the Company shall execute and deliver a new Warrant or Warrants in
exchange  for the Warrant or  Warrants  to be divided or combined in  accordance
with such notice.

                (c) The  Company  shall  prepare,  issue and  deliver at its own
expense  (other than  transfer  taxes) the new  Warrant or  Warrants  under this
Section 7.

                (d) The Company  agrees to maintain,  at its  aforesaid  office,
books for the registration and the registration of transfer of the Warrants.

8. No Rights as Shareholder  until  Exercise.  This Warrant does confer upon the
Holder any rights as a shareholder  of the Company,  either at law or in equity.
The rights of the Holder are limited to those  expressed  herein and the Holder,
by acceptance  hereof,  consents to and agrees to be bound by and to comply with
all the provisions of this Warrant.  Each Holder, by acceptance of this Warrant,
agrees  that the Company  and its  transfer  agent,  if any,  may,  prior to any
presentation of this Warrant for  registration  of transfer,  deem and treat the
person in whose name this Warrant is registered as the absolute, true and lawful
owner of this  Warrant for all purposes  whatsoever  and neither the Company nor
any transfer agent shall be affected by any notice to the contrary.

9. Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that
upon  receipt by the Company of evidence  reasonably  satisfactory  to it of the
loss, theft,  destruction or mutilation of this Warrant certificate or any stock
certificate  relating  to the  Warrant  Shares,  and in case of  loss,  theft or
destruction, of indemnity or security reasonably satisfactory to it (which shall
not include the posting of any bond),  and upon  surrender and  cancellation  of
such  Warrant or stock  certificate,  if  mutilated,  the Company  will make and
deliver a new  Warrant or stock  certificate  of like tenor and dated as of such
cancellation,  in lieu of such  Warrant  or stock  certificate.

10.  Saturdays,  Sundays,  Holidays,  etc. If the last or appointed  day for the
taking of any action or the  expiration of any right  required or granted herein
shall be a Saturday, Sunday or a legal holiday, then such action may be taken or
such right may be exercised on the next succeeding day not a Saturday, Sunday or
legal holiday.

11.  Adjustments  of  Exercise  Price and  Number of Warrant  Shares.  (a) Stock
Splits, etc. The number and kind of securities  purchasable upon the exercise of
this Warrant and the Exercise Price shall be subject to adjustment  from time to
time upon the happening of any of the  following.  In case the Company shall (i)
pay a dividend  in shares of Common  Stock or make a  distribution  in shares of
Common Stock to holders of its  outstanding  Common  Stock,  (ii)  subdivide its
outstanding  shares of Common  Stock  into a greater  number of shares of Common
Stock,  (iii)  combine  its  outstanding  shares of Common  Stock into a smaller
number of shares of Common  Stock or (iv) issue any shares of its capital  stock
in a  reclassification  of the Common Stock,  then the number of Warrant  Shares
purchasable  upon  exercise of this Warrant  immediately  prior thereto shall be
adjusted  so that the holder of this  Warrant  shall be  entitled to receive the
kind and number of Warrant  Shares or other  securities  of the Company which he
would  have  owned or have  been  entitled  to  receive  had such  Warrant  been
exercised in advance  thereof.  Upon each such adjustment of the kind and number
of Warrant  Shares or other  securities  of the  Company  which are  purchasable
hereunder,  the holder of this Warrant shall  thereafter be entitled to purchase
the number of Warrant Shares or other securities  resulting from such adjustment
at an Exercise Price per Warrant Share or other security obtained by multiplying
the Exercise Price in effect  immediately prior to such adjustment by the number
of  Warrant  Shares  purchasable  pursuant  hereto  immediately  prior  to  such
adjustment and dividing by the number of Warrant  Shares or other  securities of
the Company resulting from such adjustment.  An adjustment made pursuant to this
paragraph shall become  effective  immediately  after the effective date of such
event retroactive to the record date, if any, for such event.

(b) Reorganization,  Reclassification,  Merger,  Consolidation or Disposition of
Assets. In case the Company shall reorganize its capital, reclassify its capital
stock, consolidate or merge with or into another corporation,  or sell, transfer
or  otherwise  dispose  of all or  substantially  all its  property,  assets  or
business   to  another   corporation   and,   pursuant  to  the  terms  of  such
reorganization,   reclassification,  merger,  consolidation  or  disposition  of
assets, shares of common stock of the successor or acquiring corporation, or any
cash,  shares of stock or other securities or property of any nature  whatsoever
(including  warrants or other subscription or purchase rights) in addition to or
in lieu of  common  stock of the  successor  or  acquiring  corporation  ("Other
Property"),  are to be received by or distributed to the holders of Common Stock
of the Company,  then Holder shall have the right  thereafter  to receive,  upon
exercise of this Warrant,  the number of shares of common stock of the successor
or acquiring corporation or of the Company, if it is the surviving  corporation,
and  Other  Property  receivable  upon or as a  result  of such  reorganization,
reclassification,  merger, consolidation or disposition of assets by a holder of
the  number of shares of Common  Stock for which  this  Warrant  is  exercisable
immediately   prior  to  such  event.  In  case  of  any  such   reorganization,
reclassification,  merger, consolidation or disposition of assets, the successor
or acquiring  corporation (if other than the Company) shall expressly assume the
due and  punctual  observance  and  performance  of each and every  covenant and
condition of this  Warrant to be  performed  and observed by the Company and all
the obligations and liabilities hereunder,  subject to such modifications as may
be deemed appropriate (as determined in good faith by resolution of the Board of
Directors  of the  Company)  in order to provide  for  adjustments  of shares of
Common  Stock for which this  Warrant is  exercisable  which  shall be as nearly
equivalent as  practicable to the  adjustments  provided for in this Section 11.
For purposes of this  Section 11,  "common  stock of the  successor or acquiring
corporation"  shall include stock of such  corporation of any class which is not
preferred  as to  dividends  or  assets  over any  other  class of stock of such
corporation  and which is not subject to  redemption  and shall also include any
evidences  of  indebtedness,  shares  of  stock or other  securities  which  are
convertible into or exchangeable for any such stock,  either immediately or upon
the arrival of a specified  date or the  happening of a specified  event and any
warrants  or other  rights to  subscribe  for or purchase  any such  stock.  The
foregoing  provisions  of this Section 11 shall  similarly  apply to  successive
reorganizations,  reclassifications,  mergers,  consolidations or disposition of
assets.

12. Voluntary  Adjustment by the Company. The Company may at any time during the
term of this Warrant,  reduce the then current  Exercise Price to any amount and
for any  period of time  deemed  appropriate  by the Board of  Directors  of the
Company.

13.  Notice of  Adjustment.  Whenever the number of Warrant  Shares or number or
kind of  securities  or other  property  purchasable  upon the  exercise of this
Warrant or the Exercise Price is adjusted, as herein provided, the Company shall
promptly mail by registered or certified mail, return receipt requested,  to the
holder of this Warrant notice of such  adjustment or  adjustments  setting forth
the number of Warrant Shares (and other securities or property) purchasable upon
the exercise of this Warrant and the Exercise  Price of such Warrant Shares (and
other  securities  or property)  after such  adjustment,  setting  forth a brief
statement  of  the  facts  requiring  such  adjustment  and  setting  forth  the
computation by which such  adjustment was made.  Such notice,  in the absence of
manifest  error,  shall  be  conclusive  evidence  of the  correctness  of  such
adjustment.

14.  Notice of Corporate Action.  If at any time:

                (a) the Company shall take a record of the holders of its Common
Stock  for the  purpose  of  entitling  them to  receive  a  dividend  or  other
distribution,  or any right to subscribe  for or purchase  any  evidences of its
indebtedness,  any  shares  of stock of any  class or any  other  securities  or
property, or to receive any other right, or

                (b) there shall be any capital  reorganization  of the  Company,
any  reclassification or recapitalization of the capital stock of the Company or
any consolidation or merger of the Company with, or any sale,  transfer or other
disposition of all or substantially all the property,  assets or business of the
Company to, another corporation or,

                (c)   there  shall be a voluntary or  involuntary
dissolution, liquidation or winding up of the Company;

then, in any one or more of such cases,  the Company shall give to Holder (i) at
least 30 days' prior written  notice of the date on which a record date shall be
selected for such dividend,  distribution or right or for determining  rights to
vote  in  respect  of  any  such   reorganization,   reclassification,   merger,
consolidation, sale, transfer, disposition,  liquidation or winding up, and (ii)
in the case of any such reorganization, reclassification, merger, consolidation,
sale, transfer, disposition, dissolution, liquidation or winding up, at least 30
days'  prior  written  notice of the date when the same shall take  place.  Such
notice in accordance  with the foregoing  clause also shall specify (i) the date
on which  any such  record  is to be taken  for the  purpose  of such  dividend,
distribution  or right,  the date on which the holders of Common  Stock shall be
entitled  to any such  dividend,  distribution  or  right,  and the  amount  and
character  thereof,  and  (ii)  the  date  on  which  any  such  reorganization,
reclassification,    merger,   consolidation,   sale,   transfer,   disposition,
dissolution,  liquidation  or winding  up is to take place and the time,  if any
such  time is to be fixed,  as of which the  holders  of Common  Stock  shall be
entitled  to  exchange  their  shares of Common  Stock for  securities  or other
property deliverable upon such disposition,  dissolution, liquidation or winding
up. Each such written notice shall be sufficiently  given if addressed to Holder
at the  last  address  of  Holder  appearing  on the  books of the  Company  and
delivered in accordance with Section 16(d).

          15.  Authorized  Shares.  The Company covenants that during the period
the Warrant is  outstanding,  it will reserve from its  authorized  and unissued
Common  Stock a  sufficient  number of shares to provide for the issuance of the
Warrant Shares upon the exercise of any purchase rights under this Warrant.  The
Company  further  covenants  that its issuance of this Warrant shall  constitute
full authority to its officers who are charged with the duty of executing  stock
certificates  to execute and issue the  necessary  certificates  for the Warrant
Shares upon the exercise of the purchase rights under this Warrant.  The Company
will take all such  reasonable  action as may be  necessary  to assure that such
Warrant  Shares  may be issued  as  provided  herein  without  violation  of any
applicable law or regulation,  or of any  requirements  of the Principal  Market
upon which the Common Stock may be listed.

                The  Company  shall  not  by  any  action,  including,   without
limitation,   amending  its   certificate  of   incorporation   or  through  any
reorganization, transfer of assets, consolidation, merger, dissolution, issue or
sale of securities  or any other  voluntary  action,  avoid or seek to avoid the
observance or performance  of any of the terms of this Warrant,  but will at all
times in good  faith  assist in the  carrying  out of all such  terms and in the
taking of all such  actions as may be necessary  or  appropriate  to protect the
rights of Holder  against  impairment.  Without  limiting the  generality of the
foregoing,  the  Company  will (a) not  increase  the par value of any shares of
Common  Stock  receivable  upon the  exercise of this  Warrant  above the amount
payable  therefor upon such exercise  immediately  prior to such increase in par
value, (b) take all such action as may be necessary or appropriate in order that
the Company may validly and legally issue fully paid and nonassessable shares of
Common Stock upon the  exercise of this  Warrant,  and (c) use all  commercially
reasonable  efforts to obtain all such  authorizations,  exemptions  or consents
from any public regulatory body having jurisdiction  thereof as may be necessary
to enable the Company to perform its obligations under this Warrant.

                Before  taking  any  action  which  would  cause  an  adjustment
reducing  the current  Exercise  Price below the then par value,  if any, of the
shares of Common Stock issuable upon exercise of the Warrants, the Company shall
take any  corporate  action which may be necessary in order that the Company may
validly and legally  issue fully paid and  non-assessable  shares of such Common
Stock at such adjusted Exercise Price.

                Before  taking any action which would result in an adjustment in
the number of shares of Common Stock for which this Warrant is exercisable or in
the  Exercise  Price,  the  Company  shall  obtain  all such  authorizations  or
exemptions  thereof,  or consents  thereto,  as may be necessary from any public
regulatory body or bodies having jurisdiction thereof.

16.  Miscellaneous.

(a)  Jurisdiction.  This Warrant shall be binding upon any successors or assigns
of the Company.  This  Warrant  shall  constitute  a contract  under the laws of
Delaware  without  regard to its  conflict of law  principles  or rules,  and be
subject  to  arbitration  pursuant  to the  terms  set  forth  in  the  Purchase
Agreement.

(b)  Restrictions.  The  holder  hereof  acknowledges  that the  Warrant  Shares
acquired  upon the  exercise  of this  Warrant,  if not  registered,  will  have
restrictions upon resale imposed by state and federal securities laws.

(c)  Nonwaiver  and  Expenses.  No course of  dealing or any delay or failure to
exercise any right  hereunder on the part of Holder shall operate as a waiver of
such  right  or  otherwise  prejudice  Holder's  rights,   powers  or  remedies,
notwithstanding  all rights hereunder  terminate on the Termination Date hereof.
If the Company  willfully  fails to comply with any  material  provision of this
Warrant,  the Company shall pay to Holder such amounts as shall be sufficient to
cover  any  costs  and  expenses  including,  but  not  limited  to,  reasonable
attorneys' fees, including those of appellate proceedings, incurred by Holder in
collecting any amounts due pursuant hereto or in otherwise  enforcing any of its
rights, powers or remedies hereunder.

(d) Notices.  Any notice,  request or other document required or permitted to be
given or  delivered  to the holder  hereof by the Company  shall be delivered in
accordance with the notice provisions of the Purchase Agreement.

(e) Limitation of Liability.  No provision hereof, in the absence of affirmative
action by Holder to purchase shares of Common Stock,  and no enumeration  herein
of the rights or privileges of Holder  hereof,  shall give rise to any liability
of Holder for the purchase  price of any Common Stock or as a stockholder of the
Company,  whether  such  liability is asserted by the Company or by creditors of
the Company.

(f)  Remedies.  Holder,  in  addition to being  entitled to exercise  all rights
granted by law,  including  recovery  of  damages,  will be entitled to specific
performance  of its rights under this Warrant.  The Company agrees that monetary
damages would not be adequate  compensation for any loss incurred by reason of a
breach by it of the  provisions  of this Warrant and hereby  agrees to waive the
defense  in any action for  specific  performance  that a remedy at law would be
adequate.

(g) Successors and Assigns.  Subject to applicable securities laws, this Warrant
and the rights and  obligations  evidenced  hereby shall inure to the benefit of
and be  binding  upon the  successors  of the  Company  and the  successors  and
permitted  assigns of Holder.  The provisions of this Warrant are intended to be
for the  benefit of all Holders  from time to time of this  Warrant and shall be
enforceable by any such Holder or holder of Warrant Shares.

(h)  Amendment.  This Warrant may be modified or amended or the
provisions hereof waived with the written consent of the Company
and the Holder.

(i)  Severability.  Wherever  possible,  each provision of this Warrant shall be
interpreted  in such manner as to be effective and valid under  applicable  law,
but if any  provision of this Warrant  shall be  prohibited  by or invalid under
applicable  law,  such  provision  shall be  ineffective  to the  extent of such
prohibition or invalidity, without invalidating the remainder of such provisions
or the remaining provisions of this Warrant. (j) Headings.  The headings used in
this Warrant are for the  convenience  of reference  only and shall not, for any
purpose, be deemed a part of this Warrant.

          IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its officer thereunto duly authorized.

Dated: May 4, 2000
                         NSTOR TECHNOLOGIES, INC.

                         By:  /s/  H. Irwin Levy
                          H. Irwin Levy, Chairman


                               NOTICE OF EXERCISE

To:  nStor Technologies, Inc.



          (1) The  undersigned  hereby  elects to  purchase  ________  shares of
Common Stock (the "Common Stock"), of nStor  Technologies,  Inc. pursuant to the
terms of the  attached  Warrant,  and tenders  herewith  payment of the exercise
price in full, together with all applicable transfer taxes, if any.

          (2) Please  issue a  certificate  or  certificates  representing  said
shares of Common Stock in the name of the  undersigned  or in such other name as
is specified below:

               -------------------------------
               (Name)

               -------------------------------
               (Address)
               -------------------------------


Dated:


                                   ------------------------------
                                   Signature

                                 ASSIGNMENT FORM

         (To assign the foregoing warrant, execute this form and supply
                              required information.

                 Do not use this form to exercise the warrant.)

            FOR VALUE RECEIVED, the foregoing Warrant and all rights
evidenced thereby are hereby assigned to


_______________________________________________ whose address is

---------------------------------------------------------------.



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

                                   Dated:  ______________, _______


               Holder's Signature: _____________________________

               Holder's Address:   _____________________________

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



Signature Guaranteed:  ___________________________________________


NOTE: The signature to this  Assignment Form must correspond with the name as it
appears on the face of the Warrant,  without  alteration or  enlargement  or any
change whatsoever,  and must be guaranteed by a bank or trust company.  Officers
of  corporations  and  those  acting  in an  fiduciary  or other  representative
capacity  should  file  proper  evidence of  authority  to assign the  foregoing
Warrant.



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