MCDATA CORP
S-1, 2000-05-31
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<PAGE>   1

      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 31, 2000

                                                     REGISTRATION NO. 333-
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------

                                    FORM S-1
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------

                               MCDATA CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

<TABLE>
<S>                                <C>                                <C>
             DELAWARE                             3669                            84-1421844
 (STATE OR OTHER JURISDICTION OF      (PRIMARY STANDARD INDUSTRIAL             (I.R.S. EMPLOYER
  INCORPORATION OR ORGANIZATION)      CLASSIFICATION CODE NUMBER)           IDENTIFICATION NUMBER)
</TABLE>

                            310 INTERLOCKEN PARKWAY
                              BROOMFIELD, CO 80021
                                 (303) 460-9200
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
                            ------------------------

                               JOHN F. MCDONNELL
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                               MCDATA CORPORATION
                            310 INTERLOCKEN PARKWAY
                              BROOMFIELD, CO 80021
                                 (303) 460-9200
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
                            ------------------------

                                   COPIES TO:

<TABLE>
<S>                                <C>                                <C>
     MARGARET A. BROWN, ESQ.              PAUL T. DACIER, ESQ.          WILLIAM J. SCHNOOR, JR., ESQ.
 SKADDEN, ARPS, SLATE, MEAGHER &       SENIOR VICE PRESIDENT AND       TESTA, HURWITZ & THIBEAULT, LLP
             FLOM LLP                       GENERAL COUNSEL                   HIGH STREET TOWER
        ONE BEACON STREET                   EMC CORPORATION                    125 HIGH STREET
         BOSTON, MA 02180                  35 PARKWOOD DRIVE                   BOSTON, MA 02110
          (617) 573-4800                  HOPKINTON, MA 01748                   (617) 248-7000
                                             (508) 435-1000
</TABLE>

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

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
As soon as practicable after the effective date of this Registration Statement.
                            ------------------------

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, as amended, check the following box.  [ ]
     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration number of the earlier effective
registration statement for the same offering.  [ ]  ____________
     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement of the same
offering.  [ ]  ____________
     If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement of the same
offering.  [ ]  ____________
     If a delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box.  [ ]
                            ------------------------

                        CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------
                                                                 PROPOSED
               TITLE OF EACH CLASS OF                        MAXIMUM AGGREGATE                   AMOUNT OF
             SECURITIES TO BE REGISTERED                     OFFERING PRICE(1)               REGISTRATION FEE
---------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>                             <C>
Class B Common Stock ($0.01 par value)...............          $100,000,000                       $26,400
---------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------
</TABLE>

(1) Estimated solely for the purpose of computing the amount of the registration
    fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended.
                            -----------------------------

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT WILL
BECOME EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>   2

        The information in this prospectus is not complete and may be changed.
        We may not sell these securities until the registration statement filed
        with the Securities and Exchange Commission is effective. This
        prospectus is not an offer to sell securities, and we are not soliciting
        offers to buy these securities, in any state where the offer or sale is
        not permitted.

                SUBJECT TO COMPLETION, DATED             , 2000

                                            Shares

                              [McData Corp. LOGO]
                              Class B Common Stock

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

     Prior to this public offering, there has been no public market for our
Class B common stock. The initial public offering price of our Class B common
stock is expected to be between $          and $          per share. We have
applied to list the shares on The Nasdaq Stock Market's National Market under
the symbol "MCDT."

     The underwriters have an option to purchase a maximum of
additional shares of Class B common stock to cover over-allotments of shares.

     INVESTING IN OUR CLASS B COMMON STOCK INVOLVES RISKS. SEE "RISK FACTORS" ON
PAGE   .

<TABLE>
<CAPTION>
                                                                 UNDERWRITING
                                                   PRICE TO      DISCOUNTS AND    PROCEEDS TO
                                                    PUBLIC        COMMISSIONS       MCDATA
                                                   --------      -------------    -----------
<S>                                               <C>            <C>              <C>
Per Share.....................................              $               $               $
Total.........................................    $               $               $
</TABLE>

     Delivery of the shares of Class B common stock will be made on or about
            , 2000.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

CREDIT SUISSE FIRST BOSTON
                               DEUTSCHE BANC ALEX. BROWN
                                                     MERRILL LYNCH & CO.

               The date of this prospectus is             , 2000.
<PAGE>   3

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

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
PROSPECTUS SUMMARY....................  2
RISK FACTORS..........................  7
OUR RELATIONSHIP WITH EMC AFTER THE
  OFFERING............................  20
INFORMATION REGARDING FORWARD-LOOKING
  STATEMENTS..........................  22
USE OF PROCEEDS.......................  23
DIVIDEND POLICY.......................  23
CAPITALIZATION........................  24
DILUTION..............................  25
SELECTED CONSOLIDATED FINANCIAL
  DATA................................  26
MANAGEMENT'S DISCUSSION AND ANALYSIS
  OF FINANCIAL CONDITION AND RESULTS
  OF OPERATIONS.......................  27
BUSINESS..............................  37
</TABLE>

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
MANAGEMENT............................  51
RELATIONSHIPS AND RELATED PARTY
  TRANSACTIONS........................  59
ARRANGEMENTS BETWEEN MCDATA AND EMC...  60
PRINCIPAL STOCKHOLDERS................  68
DESCRIPTION OF CAPITAL STOCK..........  70
SHARES ELIGIBLE FOR FUTURE SALE.......  75
UNDERWRITING..........................  77
NOTICE TO CANADIAN RESIDENTS..........  80
LEGAL MATTERS.........................  81
EXPERTS...............................  81
WHERE YOU MAY FIND ADDITIONAL
  INFORMATION.........................  82
INDEX TO CONSOLIDATED FINANCIAL
  STATEMENTS..........................  F-1
</TABLE>

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

     YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS DOCUMENT OR TO
WHICH WE HAVE REFERRED YOU. WE HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH
INFORMATION THAT IS DIFFERENT. THE INFORMATION CONTAINED IN THIS DOCUMENT MAY
ONLY BE ACCURATE ON THE DATE OF THIS DOCUMENT.

                     DEALER PROSPECTUS DELIVERY OBLIGATION

     UNTIL                , 2000 (25 DAYS AFTER THE DATE OF THIS PROSPECTUS) ALL
DEALERS EFFECTING TRANSACTIONS IN THESE SECURITIES, WHETHER OR NOT PARTICIPATING
IN THIS OFFERING, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS DELIVERY
REQUIREMENT IS IN ADDITION TO THE DEALER'S OBLIGATION TO DELIVER A PROSPECTUS
WHEN ACTING AS AN UNDERWRITER AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR
SUBSCRIPTIONS.

                                        1
<PAGE>   4

                               PROSPECTUS SUMMARY

     The following summary highlights information that we present more fully
elsewhere in this prospectus. You should read this entire prospectus, including
"Risk Factors" and the consolidated financial statements and related notes,
before deciding to invest in our Class B common stock. This prospectus contains
forward-looking statements that involve risks and uncertainties. Our actual
results could differ materially from those anticipated in such forward-looking
statements as a result of factors described under "Risk Factors" and elsewhere
in this prospectus.

                               MCDATA CORPORATION

     We are a leading provider of high performance enterprise switches and
related software for connecting servers and storage systems in a storage area
network, or SAN. We combine years of proven enterprise experience in advanced
switching technologies with a knowledge of business critical applications,
service and support to solve complex business problems at the core of an
enterprise's data infrastructure. Our products enable enterprises to cost
effectively deploy a comprehensive, highly available and centrally managed
storage network to support growing storage capacity requirements. We sell our
products through industry leading original equipment manufacturers, such as EMC
Corporation, resellers, such as International Business Machines Corporation, and
systems integrators.

     During the past decade, the volume and value of data created throughout an
enterprise has increased dramatically. As a result, the demand for data storage
capacity has exploded as enterprises increasingly need to access, process and
manipulate data that is critical to their businesses. International Data
Corporation, an independent information technology research firm referred to as
IDC, estimates that multi-user disk storage grew from more than 7,000 terabytes
in 1993 to more than 185,000 terabytes in 1999, and will reach more than 1.9
million terabytes in 2003.

     The growing use of data for fundamental business processes has also greatly
increased the performance required of servers and storage systems. The inability
of traditional server-to-storage connections to provide the needed performance
enhancements has caused a significant performance bottleneck.

     To alleviate this bottleneck, fibre channel technology was introduced in
the early 1990's as a means to facilitate high performance storage connectivity,
accelerating the development of SANs. SANs enable fast, efficient and reliable
transfer of data across multiple storage devices and servers to improve the
management of data within an enterprise. However, to date, many SAN solutions
are being deployed on a distributed or localized basis within the enterprise. As
a result, enterprises have experienced difficulty in accessing and sharing
information on an enterprise-wide basis, preventing them from realizing the full
potential benefits of a SAN.

     Our solutions include hardware and software products, methodologies and
education that enable businesses to scale their operations globally through a
comprehensive, manageable, flexible data infrastructure that is optimized for
rapid application deployment and responsiveness to customer needs.

     The advantages of our solutions include the following:

     - Scalability -- Dynamic Growth.  Our solutions are designed to enable
       users to consolidate, add or reconfigure servers and storage assets
       within a comprehensive enterprise-wide SAN infrastructure. The
       architecture of our products is designed to permit businesses to expand
       their computing and storage resource needs without causing business
       interruption or a decline in overall storage system performance.

     - Connectivity -- Interoperability.  We are at the forefront of providing
       products that interoperate with the majority of popular servers and
       storage devices. Our products are designed to offer customers a high
       level of investment protection in their current infrastructure based on
       our open architecture approach to heterogeneous switching among
       standards-based SAN offerings.
                                        2
<PAGE>   5

     - Availability -- Information Anywhere, Anytime.  Our products are designed
       to provide maximum availability by using fault-tolerant technology and
       internally redundant capabilities that enable customers to run their
       businesses on a 24 x 7 basis with 99.999%, or "five-nines," up-time
       availability.

     - Manageability -- Comprehensive Control for Low Total Cost of
       Ownership.  Our enterprise-wide, fabric management solutions are designed
       to enable customers to manage their entire SAN fabric from a central
       point. Product features simplify the overall administration, service and
       support of the infrastructure, permitting more efficient use of personnel
       and increased data availability.

     - Performance -- High Price to Performance Value.  Our redundant product
       architecture is designed to provide customers with a high port density
       while yielding a lower price-per-port than products offering lower port
       counts in clustered configurations.
                            ------------------------

     We are a Delaware corporation with our principal executive offices at 310
Interlocken Parkway, Broomfield, Colorado, 80021, and our telephone number is
(303) 460-9200. We maintain a Web site at www.mcdata.com. We do not, however,
intend for our Web site to be part of this prospectus. In this prospectus,
"McDATA," "we," "us" and "our" each refers to McDATA Corporation and its
subsidiaries, and not to the underwriters or EMC. "EMC" refers to EMC
Corporation and its subsidiaries, excluding McDATA.

     McDATA and McDATA's logo are trademarks of McDATA Corporation. All other
brand names, logos, copyrights and trademarks appearing in this prospectus are
the property of their respective owners.
                                        3
<PAGE>   6

                           OUR RELATIONSHIP WITH EMC

     We are currently an indirect, majority-owned subsidiary of EMC Corporation.
Since October 1, 1997, EMC, through its direct, wholly-owned subsidiary, McDATA
Holdings Corporation, has owned 100% of our Class A common stock, which will
represent, following this offering, approximately   % of the combined voting
power of both classes of our voting stock on a fully diluted basis. Since
October 1, 1997, we have operated substantially as a separate company from
McDATA Holdings Corporation and EMC under the direction of our board of
directors, a majority of whom are unaffiliated with EMC.

     EMC currently plans to liquidate McDATA Holdings Corporation and distribute
all of the shares of our Class A common stock to the holders of EMC's common
stock on a pro rata basis approximately six to twelve months after the date of
this offering. However, EMC is not obligated to complete this distribution, and
this distribution may not occur by the anticipated time or at all. EMC will, in
its sole discretion, determine whether to complete the distribution, and the
timing, structure and all other terms of its distribution of our Class A common
stock that it owns. EMC's distribution is subject, among other things, to its
receiving a private letter ruling from the Internal Revenue Service that its
distribution of shares of our Class A common stock to its stockholders will be
tax-free to EMC and its stockholders.

     EMC acquired McDATA in December 1995. In October 1997, EMC reorganized
McDATA to separate our fibre channel business from EMC. As part of this
reorganization, we became a company focused on designing, developing,
manufacturing and selling fibre channel switching devices for connecting servers
and storage systems in a SAN or other information infrastructure. We continue to
provide, under a services agreement with McDATA Holdings Corporation,
manufacturing and distribution management services for proprietary mainframe
protocol, or ESCON(TM), switching solutions manufactured for and sold to IBM. In
addition to this services agreement, in 1997 we entered into other agreements
with EMC relating to our business and our relationship with EMC. In connection
with the offering described in this prospectus, we have entered into additional
agreements with EMC relating to the offering and the distribution by EMC of our
Class A common stock to its stockholders and to our relationship with EMC after
the completion of the offering. These agreements provide for, among other
things, various interim and ongoing relationships with EMC. We have also entered
into an OEM Purchase and License Agreement with EMC that governs EMC's purchases
of our products. Each of the agreements between us and EMC is described more
fully in the section of this prospectus titled "Arrangements between McDATA and
EMC." The terms of these agreements, which were negotiated in the context of a
parent-subsidiary relationship, may be less favorable to us than if they had
been negotiated with unaffiliated third parties. See "Risk Factors -- Risks
Related to our Relationship with EMC."
                                        4
<PAGE>   7

                                  THE OFFERING

Class B common stock
offered.......................              shares

Common stock to be outstanding
  after this offering:

  Class A common stock........   81,000,000 shares

  Class B common stock........              shares

Total.........................              shares

Underwriters' over-allotment
option........................              shares

Use of proceeds...............   We intend to use the net proceeds for general
                                 corporate purposes, including repayment of $1.9
                                 million of outstanding indebtedness to McDATA
                                 Holdings Corporation, a wholly-owned subsidiary
                                 of EMC, capital expenditures and working
                                 capital.

Voting Rights:

  Class A common stock........   One (1) vote per share

  Class B common stock........   One-tenth ( 1/10) of one vote per share

Other common stock
provisions....................   The holders of our Class A common stock and
                                 Class B common stock generally have identical
                                 rights, except for the different voting rights
                                 described above.

Proposed Nasdaq National
Market trading symbol for the
  Class B common stock........   MCDT

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

     Unless otherwise indicated, all information contained in this prospectus:

     - assumes no exercise of the underwriters' option to purchase up to
                 additional shares of our Class B common stock to cover
       over-allotments; and

     - reflects a 2-for-1 split of our Class A and Class B common stock to be
       effected prior to the offering.

     The number of shares of our Class B common stock to be outstanding
immediately after the offering:

     - is based upon 12,681,186 shares of our Class B common stock outstanding
       as of March 31, 2000; and

     - does not take into account 12,462,964 shares of our Class B common stock
       issuable upon the exercise of options outstanding as of March 31, 2000,
       at a weighted average exercise price of $2.51 per share.

                            ------------------------
                                        5
<PAGE>   8

                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE>
<CAPTION>
                                                                                    THREE MONTHS ENDED
                                              YEAR ENDED DECEMBER 31,                    MARCH 31,
                                  -----------------------------------------------   -------------------
                                  1995(1)   1996(1)   1997(1)    1998      1999       1999       2000
                                  -------   -------   -------   -------   -------   --------   --------
<S>                               <C>       <C>       <C>       <C>       <C>       <C>        <C>
Consolidated statements of
  operations data:
Product revenue.................  $11,851   $ 5,370   $ 4,035   $ 5,242   $29,466   $ 2,943    $13,760
Product revenue -- Parent.......       --       526     1,336     5,632    48,111     4,764     29,271
Service revenue -- Parent.......   22,438    26,304    27,652    25,674    17,686     5,456      4,103
                                  -------   -------   -------   -------   -------   -------    -------
Total revenue...................  $34,289   $32,200   $33,023   $36,548   $95,263   $13,163    $47,134
Gross profit....................   24,382    24,196    21,753    23,443    45,692     7,073     24,963
                                  -------   -------   -------   -------   -------   -------    -------
Income (loss) from operations...    4,427     8,931    (1,230)   (8,565)     (273)   (2,008)     8,867
                                  -------   -------   -------   -------   -------   -------    -------
Net income (loss)...............  $ 2,805   $ 5,770   $(3,224)  $(2,468)  $(1,033)  $(1,980)   $ 5,312
                                  =======   =======   =======   =======   =======   =======    =======
Basic net income (loss) per
  share.........................  $  0.03   $  0.06   $ (0.04)  $ (0.03)  $ (0.01)  $ (0.02)   $  0.06
                                  =======   =======   =======   =======   =======   =======    =======
Shares used in computing basic
  net income (loss) per
  share(2)......................   91,000    91,000    91,000    91,000    91,638    91,014     93,084
Diluted net income (loss) per
  share(2)......................  $  0.03   $  0.06   $ (0.04)  $ (0.03)  $ (0.01)  $ (0.02)   $  0.05
                                  -------   -------   -------   -------   -------   -------    -------
Shares used in computing diluted
  net income (loss) per
  share(2)......................   91,000    91,000    91,000    91,000    91,638    91,014     99,103
</TABLE>

<TABLE>
<CAPTION>
                                                                   MARCH 31, 2000
                                                              -------------------------
                                                              ACTUAL     AS ADJUSTED(3)
                                                              -------    --------------
<S>                                                           <C>        <C>
Consolidated balance sheet data:
Cash and cash equivalents...................................  $ 8,782       $
Working capital.............................................   22,598
Total assets................................................   57,746
Short-term debt -- Parent...................................    1,900
Long-term portion of capital lease obligations..............    1,137
Total stockholders' equity..................................   36,909
</TABLE>

-------------------------
(1) In October 1997, EMC reorganized McDATA to separate our fibre channel
    devices business from EMC. As part of this reorganization, we became a
    company focused on designing, developing, manufacturing and selling fibre
    channel switching devices. As a result, the historical financial information
    for the three years ended December 31, 1997 has been adjusted to reflect the
    impact of the reorganization as if it occurred at the beginning of 1995.
(2) Per share computations for 1995, 1996 and 1997 have been calculated using
    the actual number of shares issued on October 1, 1997 as the capital
    structure for prior periods was not indicative of the current structure.
(3) The as adjusted balance sheet reflects this offering at an assumed initial
    offering price of $     per share of Class B common stock, the mid-price of
    the filing range, after deducting an assumed underwriting discount and
    estimated offering expenses payable by us and the repayment of the
    short-term debt -- Parent.
                                        6
<PAGE>   9

                                  RISK FACTORS

     You should carefully consider the following risk factors and other
information contained in this prospectus before purchasing our Class B common
stock. Investing in our Class B common stock involves a high degree of risk.
Risks and uncertainties, in addition to those we describe below, that are not
presently known to us or that we currently believe are immaterial, or that may
be disclosed from time to time in our other filings with the Securities and
Exchange Commission, may also impair our business, financial condition and
results of operations. If any of the following risks occur, our business,
financial condition and results of operations could be seriously harmed. In
addition, the trading price of our Class B common stock could decline due to the
occurrence of any of these risks, and you may lose all or part of your
investment.

                         RISKS RELATED TO OUR BUSINESS

WE HAVE INCURRED LOSSES IN THE PAST AND MAY NOT SUSTAIN PROFITABILITY IN THE
FUTURE.

     We have incurred losses in all but the two most recent fiscal quarters
since 1997, when we focused our business on the design, development and
manufacture of fibre channel switching devices. In addition, we may incur losses
in the future. Although our revenues have grown in recent quarters, we cannot be
certain that we can sustain our revenue growth rates or that we can sustain
profitability. Our future operating results will depend on many factors,
including the growth of the fibre channel market, market acceptance of new
products, demand for our products and levels of product and price competition.
In addition, we expect to incur continued significant product development, sales
and marketing, and general and administrative expenses and, as a result, we may
not be able to achieve or sustain profitability.

WE DEPEND ON TWO KEY DISTRIBUTION RELATIONSHIPS FOR A SIGNIFICANT PORTION OF OUR
REVENUE, AND THE LOSS OF EITHER OF THEM COULD SIGNIFICANTLY REDUCE OUR REVENUES.

     We depend on EMC Corporation for a significant portion of our total
revenue. Sales to EMC, which is an original equipment manufacturer, or OEM,
customer, represented approximately 71% of our total revenue for the three
months ended March 31, 2000. In addition, International Business Machines
Corporation, or IBM, represented approximately 19% of our total revenue for the
same period. We anticipate that our future operating results will continue to
depend heavily on sales to EMC and IBM. Therefore, the loss of either EMC or IBM
as a customer, or a significant reduction in sales to either EMC or IBM in any
fiscal period, could significantly reduce our revenue.

A LARGE PERCENTAGE OF OUR QUARTERLY SALES OCCURS AT THE END OF THE QUARTER,
CONTRIBUTING TO POSSIBLE QUARTERLY FLUCTUATIONS IN REVENUE THAT COULD ADVERSELY
AFFECT OUR OPERATING RESULTS AND CAUSE OUR STOCK PRICE TO FLUCTUATE.

     Our quarterly results have historically reflected an uneven pattern in
which a disproportionate percentage of a quarter's total sales occurs in the
last month, weeks or even days of each quarter. This pattern makes the
prediction of revenue, earnings and working capital for each financial period
especially difficult and increases the risk of unanticipated variations from
budgeted quarterly results and financial condition. Additional factors that
affect us which could cause our revenue and operating results to vary in future
periods include:

     - the size, timing, terms and fluctuations of customer orders, particularly
       large orders from our significant OEM or reseller customers;

     - our ability to attain and maintain market acceptance of our products;

     - seasonal fluctuations in customer buying patterns;

                                        7
<PAGE>   10

     - the timing of the introduction or enhancement of products by us, our
       significant OEM or reseller customers or our competitors;

     - our ability to obtain sufficient supplies of single- or limited-source
       components of our products; and

     - increased operating expenses, particularly in connection with our
       strategies to increase brand awareness or to invest in accelerated
       research and development.

     Our uneven sales pattern makes it extremely difficult for our management to
predict near-term demand and adjust manufacturing capacity accordingly. If
orders for our products vary substantially from the predicted demand, our
ability to assemble, test and ship orders received in the last weeks and days of
each quarter may be limited, which could seriously harm quarterly revenue or
earnings.

     Moreover, an unexpected decline in revenue without a corresponding and
timely reduction in expenses could intensify the impact of these factors on our
business, financial condition and results of operations and cause our stock
price to fluctuate.

WE CURRENTLY HAVE LIMITED PRODUCT OFFERINGS AND MUST SUCCESSFULLY INTRODUCE NEW
AND ENHANCED PRODUCTS THAT RESPOND TO RAPID TECHNOLOGICAL CHANGES AND EVOLVING
INDUSTRY STANDARDS.

     In 1999, we derived approximately 43% of our revenue from sales of our
ED-5000 product. We expect that revenue from this product will continue to
account for a substantial portion of our revenue for the foreseeable future.
Therefore, continued market acceptance of this product is critical to our future
success. Factors such as performance, market positioning, the availability and
price of competing products, the introduction of new technologies and the
success of our OEM, reseller and systems integrator customers will affect the
market acceptance of our products.

     In addition, our future success depends upon our ability to address the
changing needs of customers and to transition to new technologies and industry
standards. The introduction of competing products, embodying new technologies or
the emergence of new industry standards could render our products
non-competitive, obsolete or unmarketable and seriously harm our market share,
revenue and gross margin. Risks inherent in this transition include the
inability to expand production capacity to meet demand for new products, the
impact of customer demand for new products on products being replaced, and
delays in the initial shipment of new products. There can be no assurances that
we will successfully manage these transitions.

IF WE FAIL TO EXPAND OUR DISTRIBUTION CHANNELS AND MANAGE OUR DISTRIBUTION
RELATIONSHIPS, OUR REVENUE COULD BE SIGNIFICANTLY REDUCED.

     Our success will depend on our continuing ability to develop and manage
relationships with significant OEMs, resellers and systems integrators, as well
as on the sales efforts and success of these customers. We cannot assure you
that we will be able to expand our distribution channels, manage our
distribution relationships successfully or that our customers will market our
products effectively. Our failure to expand our distribution channels or manage
successfully our distribution relationships or the failure of our customers to
sell our products could reduce our revenue.

WE ARE DEPENDENT ON A SINGLE OR LIMITED NUMBER OF SUPPLIERS FOR CERTAIN KEY
COMPONENTS OF OUR PRODUCTS, AND THE FAILURE OF ANY OF THOSE SUPPLIERS TO MEET
OUR PRODUCTION NEEDS COULD SERIOUSLY HARM OUR ABILITY TO MANUFACTURE OUR
PRODUCTS, RESULT IN DELAYS IN THE DELIVERY OF OUR PRODUCTS AND HARM OUR REVENUE.

     We currently purchase several key components from single or limited
sources. We purchase application specific integrated circuits, or ASICs, printed
circuit boards and power supplies from single sources, and gigabit interface
converters and 1x9 transceivers from limited sources. Additional

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<PAGE>   11

sole- or limited-sourced components may be incorporated into our products in the
future. Delays in the delivery of components for our products could result in
decreased revenue. We do not have any long-term supply contracts to ensure
sources of supply. In addition, our suppliers may enter into exclusive
arrangements with our competitors, stop selling their products or components to
us at commercially reasonable prices or refuse to sell their products or
components to us at any price, which could harm our operating results. If our
suppliers are unable to provide, or we are unable otherwise to obtain these
components for our products on the schedule and in the quantities we require, we
will be unable to manufacture our products. If we fail to effectively manage our
relationships with these key suppliers, or if our suppliers experience delays,
disruptions, capacity constraints or quality control problems in their
manufacturing operations, our ability to manufacture and ship products to our
customers could be delayed, and our competitive position, reputation, business,
financial condition and results of operations could be seriously harmed.

THE LOSS OF OUR CONTRACT MANUFACTURER, OR THE FAILURE TO FORECAST DEMAND
ACCURATELY FOR OUR PRODUCTS OR TO MANAGE OUR RELATIONSHIP WITH OUR CONTRACT
MANUFACTURER SUCCESSFULLY, WOULD NEGATIVELY IMPACT OUR ABILITY TO MANUFACTURE
AND SELL OUR PRODUCTS.

     We rely on a third-party manufacturer to manufacture all of our circuit
boards and to perform extensive testing and assembly of our products. We do not
have a long-term supply contract with this manufacturer and, therefore, it is
not obligated to supply products to us for any specific period, or in any
specific quantity, except as may be provided in a particular purchase order. We
generally place orders for circuit boards with our contract manufacturer
approximately three to four months prior to the anticipated delivery date, with
order volumes based on forecasts of demand for our products. If we fail to
forecast demand for our products accurately, we may be unable to obtain adequate
manufacturing capacity from our contract manufacturer to meet our customers'
delivery requirements, or we may accumulate excess inventories. We may be unable
to respond adequately to unexpected increases in customer purchase orders, and
therefore be unable to benefit from this incremental demand. Our contract
manufacturer has not provided assurances to us that adequate capacity will be
available to us within the time required to meet additional demand for our
products.

     In addition, we coordinate our efforts with those of our component
suppliers and our contract manufacturer in order to rapidly achieve volume
production. If we should fail to manage effectively our relationships with our
component suppliers and our contract manufacturer, or if any of our suppliers or
our manufacturer experiences delays, disruptions, capacity constraints or
quality control problems in its manufacturing operations, our ability to ship
products to our customers could be delayed, and our competitive position and
reputation could be harmed. Qualifying a new contract manufacturer and
commencing volume production can be expensive and time consuming. If we are
required to change or choose to change contract manufacturers, we may lose
revenue and damage our customer relationships.

IF WE FAIL TO SUCCESSFULLY DEVELOP THE MCDATA BRAND, OUR REVENUE MAY NOT GROW
AND OUR STOCK PRICE MAY FALL.

     Our name is not widely recognized as a brand in the marketplace. We have
been engaged in the business of providing connectivity solutions since 1982,
originally as an independent company and since 1995 as an indirect subsidiary of
EMC. We have operated substantially as a separate company from McDATA Holdings
Corporation and EMC since October 1997. EMC, which currently accounts for the
majority of our revenue, markets our products under its own brand name. As a
result, we have not fully established our brand name. We believe that
establishing and maintaining the McDATA brand is a critical component in
maintaining and developing strategic OEM, reseller and systems integrator
relationships, and the importance of brand recognition will increase as the
number of vendors of competitive products increases. Our failure to successfully
develop our brand may prevent

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<PAGE>   12

us from expanding our business and growing our revenue, which could cause the
price of our stock to fall. Similarly, if we incur excessive expenses in an
attempt to promote and maintain the McDATA brand, our business, financial
condition and results of operations could be seriously harmed.

THE STORAGE AREA NETWORK MARKET IN WHICH WE COMPETE IS STILL DEVELOPING AND
UNPREDICTABLE, AND IF THIS MARKET DOES NOT CONTINUE TO DEVELOP AND EXPAND AS WE
ANTICIPATE, OUR BUSINESS WILL SUFFER.

     The market for storage area networks, or SANs, and related products has
only recently begun to develop and is rapidly evolving. Because this market is
new, it is difficult to predict its potential size or future growth rate. Our
ED-5000 product, from which we derived approximately 43% of our total revenues
in 1999, is used extensively in SANs. Accordingly, widespread adoption of SANs
as an integral part of data-intensive enterprise computing environments is
critical to our future success. Potential end-user customers who have invested
substantial resources in their existing data storage and management systems may
be reluctant or slow to adopt a new approach, like SANs. Our success in
generating net revenue in this emerging market will depend on, among other
things, our ability to:

     - educate our potential OEM customers, resellers, systems integrators and
       end users about the benefits of SANs and the use of our products in the
       SAN environment; and

     - predict, develop and base our products on standards that ultimately
       become industry standards.

THE SALES CYCLE FOR OUR PRODUCTS IS LONG, AND WE MAY INCUR SUBSTANTIAL
NON-RECOVERABLE EXPENSES AND DEVOTE SIGNIFICANT RESOURCES TO SALES THAT DO NOT
OCCUR WHEN ANTICIPATED OR AT ALL.

     Our OEM, reseller and systems integrator customers typically conduct
significant evaluation, testing, implementation and acceptance procedures before
they begin to market and sell new solutions that include our products. This
evaluation process is lengthy and may extend up to one year or more. This
process is complex and may require significant sales, marketing and management
efforts on our part. This process becomes more complex as we simultaneously
qualify our products with multiple customers. As a result, we may expend
significant resources to develop customer relationships before we recognize any
revenue from these relationships.

GROWTH IN OUR OPERATIONS MAY PLACE A SIGNIFICANT STRAIN ON OUR MANAGEMENT
SYSTEMS AND RESOURCES.

     Our future operating results will depend on our management's ability to
manage growth, including but not limited to, hiring and retaining significant
numbers of qualified employees, forecasting revenue, controlling expenses,
managing our manufacturing capacity and other assets and executing on our plans.
Growth in our operations may place a significant strain on our management and
information systems and resources as we address issues such as enhancing and
expanding our infrastructure.

OUR OPERATIONS AND CUSTOMER RELATIONSHIPS MAY BECOME STRAINED DUE TO RAPID
EXPANSION.

     We intend to continue to expand our operations in the foreseeable future to
pursue existing and potential market opportunities both inside and outside the
United States. This rapid growth places a significant demand on management and
operational resources. Our management, personnel, systems, procedures, controls
and customer service may be inadequate to support our future operations. To
manage expansion effectively, we must implement and improve our operational
systems, procedures, controls and customer service on a timely basis. If we are
unable to properly manage this growth, our operating results, reputation and
customer relationships could be harmed.

                                       10
<PAGE>   13

OUR BUSINESS COULD BE SERIOUSLY HARMED AS A RESULT OF THE RISKS ASSOCIATED WITH
EXISTING ALLIANCES WE HAVE WITH CERTAIN COMPANIES.

     We have alliances with leading software companies including Microsoft
Corporation and Tivoli, a division of IBM, and plan to continue our strategy of
developing key alliances. We work with these companies to integrate and qualify
our products with their products. There can be no assurance that we will be
successful in our ongoing strategic alliances or that we will be able to find
further suitable business relationships as we develop new products. Any failure
to maintain or continue to expand these relationships could seriously harm our
business, financial condition or results of operations.

     In addition, there can be no assurance that our strategic alliance partners
will not seek similar relationships with our competitors or discontinue their
relationships with us.

WE MAY NOT BE ABLE TO MEET OUR FUTURE CAPITAL REQUIREMENTS, LIMITING OUR ABILITY
TO GROW.

     We believe that the net proceeds of this offering, together with our
existing cash balances and expected cash flow from future operations will be
sufficient to meet our capital requirements at least through the next twelve
months. However, we may be required, or could elect, to seek additional funding
prior to that time. In the event that we are required or elect to raise
additional funds, we may not be able to do so on favorable terms, if at all.
Moreover, if we issue new equity securities, purchasers of those securities may
have rights, preferences or privileges senior to those of holders of our Class B
common stock. If we cannot raise funds on acceptable terms, we may be unable to
develop or enhance our products, take advantage of future opportunities or
respond to competitive pressures or unanticipated future capital requirements.

UNDETECTED SOFTWARE OR HARDWARE DEFECTS IN OUR PRODUCTS COULD RESULT IN LOSS OF
OR DELAY IN MARKET ACCEPTANCE OF OUR PRODUCTS AND COULD INCREASE OUR COSTS OR
REDUCE OUR REVENUE.

     Our products may contain undetected software or hardware errors when first
introduced or when new versions are released. Our products are complex, and we
have from time to time detected errors in existing products, and we may from
time to time find errors in our existing, new or enhanced products. In addition,
our products are combined with products from other vendors. As a result, should
problems occur, it may be difficult to identify the source of the problem. These
errors could result in a loss of or delay in market acceptance of our products
and would increase our costs, reduce our revenue and cause significant customer
relations problems.

IF WE LOSE KEY PERSONNEL OR ARE UNABLE TO HIRE ADDITIONAL QUALIFIED PERSONNEL,
WE MAY NOT BE SUCCESSFUL.

     Our success depends to a significant degree upon the continued
contributions of our key management, technical, sales and marketing, finance and
operations personnel, many of whom would be difficult to replace. In particular,
we believe that our future success is highly dependent on John F. McDonnell, our
President and Chief Executive Officer and the Chairman of our board of
directors. In addition, our engineering and product development teams are
critical in developing our products and have developed important relationships
with customers and their technical staffs. The loss of any of these key
personnel could harm our operations and customer relationships. We do not have
key person life insurance on any of our key personnel.

     We believe our future success will also depend in large part upon our
ability to attract and retain highly skilled managerial, engineering, sales and
marketing, and finance and operations personnel. We are presently engaged in a
search for a replacement for our Chief Financial Officer. As we increase our
production and sales levels, we will need to attract and retain additional
qualified skilled workers for our operations. In recent years there has been
great demand among companies in the technology industry for these personnel. In
particular, competition for these personnel has become increasingly

                                       11
<PAGE>   14

intense in the greater Denver, Colorado metropolitan area, where we have our
headquarters and certain of our manufacturing facilities, and the greater
Toronto, Canada metropolitan area, where we have an engineering group. We cannot
assure you that we will continue to be able to attract and retain qualified
personnel, including a Chief Financial Officer, or that delays in hiring
required personnel, particularly engineers, will not delay the development or
introduction of products or negatively impact our ability to sell our products.

IF WE CANNOT COMPETE SUCCESSFULLY IN THE FUTURE AGAINST EXISTING OR POTENTIAL
COMPETITORS, OUR OPERATING RESULTS WILL SUFFER.

     The market for our fibre channel switching products is competitive, and is
likely to become even more so. Our primary competitor in the fibre channel
switch market is Brocade Communications Systems, Inc. Other companies are also
providing fibre channel switches and other products to the SAN market, including
Ancor Communications, Inc., Gadzoox Networks, Inc. and Vixel Corporation. In the
future, we may also compete with networking companies that may develop SAN
products or other companies in related or other industries for which future
direct participation in the market for switching devices may become strategic.

     EMC, which represented approximately 71% of our total revenue for the three
months ended March 31, 2000, has agreed not to develop or manufacture products
that compete with our products for two years after the completion of this
offering. Upon the expiration of the two-year period, we have no agreement that
would restrict EMC from competing with us in the development or manufacture of
these products. In addition, EMC has recently agreed to resell certain products
offered by two of our competitors. Moreover, under a cross license agreement
between us and EMC, we have granted EMC a license under our patents to make, use
and sell any products that EMC is selling or distributing up to the date of the
offering, including products that compete with ours.

     Continued or increased competition could result in pricing pressures,
reduced sales, reduced margins, reduced profits, reduced market share or the
failure of our products to achieve or maintain market acceptance. Some of our
competitors and potential competitors have longer operating histories, greater
name recognition, access to larger customer bases, more established distribution
channels or substantially greater resources than we have. As a result, they may
be able to respond more quickly than we can to new or changing opportunities,
technologies, standards or customer requirements.

WE MAY ENGAGE IN FUTURE ACQUISITIONS THAT DILUTE OUR STOCKHOLDERS AND CAUSE US
TO INCUR DEBT OR ASSUME CONTINGENT LIABILITIES.

     While we have no current agreements or negotiations underway, in the future
we may buy businesses, products or technologies that would complement our
current products, expand the breadth of our markets or enhance our technical
capabilities. If we make any future purchases, we could issue stock that would
dilute existing stockholders' percentage ownership, incur substantial debt or
assume contingent liabilities.

     These purchases also involve numerous risks, including:

     - problems assimilating the purchased operations, technologies or products;

     - unanticipated costs associated with the acquisition;

     - diversion of management's attention from our core business;

     - adverse effects on existing business relationships with suppliers and
       customers;

     - incorrect estimates made in the accounting for acquisitions;

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<PAGE>   15

     - risks associated with entering markets in which we have no or limited
       prior experience; and

     - potential loss of employees of purchased organizations.

CONSOLIDATION OF OUR COMPETITORS MAY CAUSE US TO LOSE CUSTOMERS AND NEGATIVELY
AFFECT OUR SALES.

     Consolidation in the data storage industry may strengthen our competitors'
positions in our market, cause us to lose customers and hurt our sales. In
addition, acquisitions may strengthen our competitors' financial, technical and
marketing resources and provide access to potential customers, which may harm
our business.

WE DO NOT HAVE SIGNIFICANT EXPERIENCE IN INTERNATIONAL MARKETS AND MAY HAVE
UNEXPECTED COSTS AND DIFFICULTIES IN DEVELOPING INTERNATIONAL REVENUE.

     We intend to expand the marketing and sales of our products
internationally. We have limited experience in marketing, distributing and
supporting our products internationally and may not be able to maintain or
increase international market demand for our products. In addition, our
international operations are generally subject to inherent risks and challenges
that could harm our operating results, including:

     - expenses associated with developing and customizing our products for
       foreign countries;

     - multiple, conflicting and changing governmental laws and regulations;

     - tariffs, quotas and other import restrictions on computer peripheral
       equipment;

     - longer sales cycles for our products;

     - reduced or limited protections of intellectual property rights;

     - compliance with international standards that differ from domestic
       standards; and

     - political and economic instability.

     Any negative effects on our international business could harm our business,
operating results and financial condition as a whole. To date, none of our
international revenue or costs have been denominated in foreign currencies. As a
result, an increase in the value of the U.S. dollar relative to foreign
currencies could make our products more expensive and thus less competitive in
foreign markets. A portion of our international revenue may be denominated in
foreign currencies in the future, which will subject us to risks associated with
fluctuations in those foreign currencies.

IF WE ARE UNABLE TO ADEQUATELY PROTECT OUR INTELLECTUAL PROPERTY, WE MAY NOT BE
ABLE TO COMPETE EFFECTIVELY.

     We rely on a combination of patent, copyright, trademark and trade secret
laws and restrictions on disclosure to protect our intellectual property rights.
We also enter into confidentiality and/or license agreements with our employees,
consultants and corporate partners. Despite our efforts to protect our
proprietary rights, unauthorized parties may copy or otherwise obtain and use
our products or technology. Monitoring unauthorized use of our products is
difficult and the steps we have taken may not prevent unauthorized use of our
technology, particularly in foreign countries where the laws may not protect our
proprietary rights as fully as in the United States. For a more complete
discussion of the protection of our intellectual property, see
"Business -- Intellectual Property."

     Although we are not currently involved in any intellectual property
litigation, we may be a party to litigation in the future either to protect our
intellectual property or as a result of alleged infringements of others'
intellectual property. These claims and any resulting litigation could subject
us to significant liability for damages or could cause our proprietary rights to
be invalidated.

                                       13
<PAGE>   16

Litigation, regardless of the merits of the claim or outcome, would likely be
time consuming and expensive to resolve and would divert management time and
attention. Any potential intellectual property litigation could also force us to
do one or more of the following:

     - stop using the challenged intellectual property or selling our products
       or services that incorporate it;

     - obtain a license to use the challenged intellectual property or to sell
       products or services that incorporate it, which license may not be
       available on reasonable terms, or at all; and

     - redesign those products or services that are based on or incorporate the
       challenged intellectual property.

     If we are forced to take any of these actions, we may be unable to
manufacture and sell our products, and our revenue would be reduced.

     We currently hold a sublicense to certain IBM patents under the terms of a
cross license agreement between IBM and EMC. We have granted IBM a license to
all of our patents under this cross license agreement. Under the terms of that
agreement, if EMC distributes the shares of our Class A common stock indirectly
held by it to its stockholders as it currently contemplates, the sublicense we
hold to those IBM patents will terminate. We are not aware of any issued or
pending IBM patents that are infringed by our products, but if IBM, after the
contemplated distribution by EMC of our Class A common stock to its
stockholders, were to allege any such infringement, we may have difficulty
negotiating a settlement. If we were unable to negotiate a settlement with IBM,
our ability to produce an infringing product could be affected, which could
materially and adversely affect our business.

IF WE BECOME SUBJECT TO UNFAIR HIRING CLAIMS, WE COULD INCUR SUBSTANTIAL COSTS
IN DEFENDING OURSELVES.

     Companies in our industry whose employees accept positions with competitors
frequently claim that their competitors have engaged in unfair hiring practices
or that employees have misappropriated confidential information or trade
secrets. We cannot assure you that we will not receive claims of this kind or
other claims relating to our employees in the future as we seek to hire
qualified personnel or that those claims will not result in material litigation.
We could incur substantial costs in defending ourselves or our employees against
such claims, regardless of their merits. In addition, defending ourselves or our
employees from such claims could divert the attention of our management away
from our operations.

                   RISKS RELATED TO OUR RELATIONSHIP WITH EMC

THE SUPERIOR VOTING RIGHTS OF CLASS A COMMON STOCK RELATIVE TO CLASS B COMMON
STOCK COULD ADVERSELY AFFECT THE STOCK PRICE AND LIQUIDITY OF THE CLASS B COMMON
STOCK YOU PURCHASE IN THE OFFERING.

     The holders of our Class A and Class B common stock generally have
identical rights, except that holders of our Class A common stock are entitled
to one vote per share and holders of our Class B common stock are entitled to
one-tenth of a vote per share on all matters to be voted on by stockholders. You
will be purchasing our Class B common stock if you purchase shares in the
offering. EMC, which currently owns all of the outstanding shares of Class A
common stock through its wholly-owned subsidiary, McDATA Holdings Corporation,
currently plans to distribute all of the shares of Class A common stock it owns
to its stockholders approximately six to twelve months after this offering. The
difference in the voting rights of the Class A and Class B common stock could
diminish the value of the Class B common stock to the extent that investors or
any potential future

                                       14
<PAGE>   17

purchasers of our Class B common stock ascribe value to the superior voting
rights of the Class A common stock. In addition, the existence of two separate
classes of publicly traded common stock after EMC's intended distribution could
result in less liquidity for either class of our common stock than if there were
only one class of common stock. For more information about the rights associated
with owning our Class A and Class B common stock, see "Description of Our
Capital Stock."

WE HAVE ENTERED INTO AGREEMENTS WITH EMC THAT, DUE TO OUR PARENT-SUBSIDIARY
RELATIONSHIP, MAY CONTAIN TERMS LESS BENEFICIAL TO US THAN IF THEY HAD BEEN
NEGOTIATED WITH UNAFFILIATED THIRD PARTIES.

     In October 1997, in connection with the reorganization of our business, we
entered into certain agreements with EMC relating to our business relationship
with EMC after the 1997 reorganization. In addition, we have recently entered
into agreements with EMC relating to our relationship with EMC after the
completion of the offering and distribution. We have also recently entered into
an OEM Purchase and License Agreement with EMC that governs EMC's purchases of
McDATA products and grants EMC rights to use, support and distribute software
for use in connection with these products. These agreements were negotiated and
made in the context of a parent-subsidiary relationship. As a result, some of
these agreements may have terms and conditions, in the case of the OEM
agreement, including the terms of pricing, that are less beneficial to us than
agreements negotiated with unaffiliated third parties. Revenue from EMC
represented approximately 71% of our total revenue for the three month period
ended March 31, 2000. In addition, in some instances, our ability to terminate
these agreements is limited, which may prevent us from being able to negotiate
more favorable terms with EMC after the offering or from entering into similar
agreements with third parties. See "Arrangements between McDATA and EMC."

WE DEPEND HEAVILY ON EMC AS OUR KEY OEM CUSTOMER; IF OUR RELATIONSHIP WITH EMC
ADVERSELY CHANGES AFTER THE OFFERING, OUR REVENUE WILL BE SIGNIFICANTLY REDUCED.

     For the three month period ended March 31, 2000, our product sales to EMC
represented approximately 62% of our total revenue. In addition, during the same
period, revenue under our service agreement with McDATA Holdings Corporation,
pursuant to which we manufacture and supply ESCON switching devices for IBM,
represented approximately 8% of our total revenue. EMC has recently agreed to
resell products offered by two of our competitors, and nothing restricts EMC
from expanding those relationships in a manner that could be adverse to us.
After the offering and the proposed distribution by EMC of our Class A common
stock to its stockholders, if our business relationship with EMC ends or
significantly changes, resulting in reduced sales to EMC, our revenue will be
significantly reduced.

IF EMC DOES NOT COMPLETE ITS DISTRIBUTION OF OUR CLASS A COMMON STOCK, EMC WILL
CONTINUE TO BE IN A POSITION TO EXERCISE CONTROL OVER OUR BUSINESS AND THE
LIQUIDITY OF OUR CLASS B COMMON STOCK IN THE PUBLIC MARKET MAY BE CONSTRAINED.

     EMC currently intends, subject to, among other things, obtaining approval
by the EMC board of directors and a ruling from the Internal Revenue Service
that EMC's proposed distribution of our Class A common stock indirectly held by
it will be tax-free to EMC and its stockholders, to distribute to its
stockholders on a pro rata basis all of our Class A common stock that it owns
approximately six to twelve months after this offering, although it is not
obligated to do so. This distribution may not occur by that time or at all. At
the time of this offering, we will not know what the ruling from the Internal
Revenue Service regarding the tax treatment of the distribution will be. If EMC
does not receive a favorable tax ruling, it is not likely to make the
distribution by the anticipated time or at all. If the distribution is delayed
or not completed, the liquidity of our Class B common stock in the public market
may be constrained unless and until EMC elects to sell some of its significant
ownership of our company. The sale or potential sale by EMC of all or a
significant

                                       15
<PAGE>   18

portion of our Class A common stock in the public market could diminish market
prices for our Class B common stock. Because of the limited liquidity of the
Class B common stock until the proposed distribution occurs, relatively small
trades of our Class B common stock may have a disproportionate effect on the
stock price for our Class B common stock. Until this distribution occurs, the
risks discussed below relating to EMC's control of us and the potential business
conflicts of interest between EMC and us will continue to be relevant to our
stockholders.

WE WILL BE CONTROLLED BY EMC AS LONG AS IT OWNS A MAJORITY OF THE COMBINED
VOTING POWER OF OUR COMMON STOCK, AND OUR OTHER STOCKHOLDERS WILL BE UNABLE TO
AFFECT THE OUTCOME OF STOCKHOLDERS' VOTING DURING THAT TIME.

     After the completion of this offering of shares of our Class B common
stock, EMC will continue to own 100% of our Class A common stock through McDATA
Holdings Corporation, which will represent approximately      % of the combined
voting power of all classes of our voting stock. In addition, EMC is not
prohibited from selling a controlling interest in us to a third-party or to
third parties. As long as EMC controls a majority of the voting power of our
outstanding common stock, EMC will continue to be able to elect our entire board
of directors and to remove any director, with or without cause. Investors in
this offering will not be able to affect the outcome of any stockholder vote
prior to the planned distribution of our stock to the EMC stockholders. As a
result, EMC will control all matters affecting us, including:

     - the composition of our board of directors and, through it, any
       determination with respect to our business direction and policies,
       including the appointment and removal of officers;

     - any determinations with respect to mergers, acquisitions or other
       business combinations;

     - our acquisition or disposition of assets;

     - our financing;

     - the payment of dividends on our common stock; and

     - determinations with respect to our tax returns.

     The ability of EMC to affect the outcome of any stockholder vote could
delay or prevent someone from acquiring or merging with us and could prevent you
from receiving a premium for your shares of Class B common stock.

WE MAY HAVE POTENTIAL BUSINESS CONFLICTS OF INTEREST WITH EMC WITH RESPECT TO
OUR PAST AND ONGOING RELATIONSHIPS, AND BECAUSE OF EMC'S CONTROLLING OWNERSHIP,
WE MAY NOT RESOLVE THESE CONFLICTS ON THE MOST FAVORABLE TERMS TO US.

     Conflicts of interest may arise between EMC and us in a number of areas
relating to our past and ongoing relationships including:

     - tax, indemnification and other matters arising in connection with our
       past and current position as a subsidiary of EMC and as a member of EMC's
       consolidated financial reporting group;

     - intellectual property matters;

     - environmental matters;

     - employee retention and recruiting;

     - sales or distribution by EMC of all or any portion of its ownership
       interest in us; and

     - business opportunities that may be attractive to both EMC and us.

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<PAGE>   19

     Subject to certain exceptions, for a period of two years after the
completion of this offering, EMC has agreed that it will not develop or
manufacture products that are competitive to our products. For the same period
of time and subject to certain exceptions, we have agreed not to develop or
manufacture products that are competitive to EMC's products. Upon the
termination of that non-competition restriction, EMC may compete directly with
us. In addition, EMC has recently entered into reseller relationships with two
of our competitors, and nothing restricts EMC from expanding or extending those
relationships in a manner that could adversely affect our business.

     We may not be able to resolve any potential conflicts, and even if we do,
the resolution may be less favorable than if we were dealing with an
unaffiliated party. The agreements that we have entered into with EMC may be
amended upon agreement between the parties. While we are controlled by EMC, EMC
may be able to require us to agree to amendments to these agreements that may be
less favorable to us than the current terms of the agreements or agreements not
negotiated in a parent-subsidiary context.

SOME OF OUR DIRECTORS AND EXECUTIVE OFFICERS MAY HAVE CONFLICTS OF INTEREST
BECAUSE OF THEIR OWNERSHIP OF EMC CAPITAL STOCK.

     Some of our directors and executive officers own a substantial amount of
EMC common stock and options to purchase EMC common stock. In addition, one of
our directors, David A. Donatelli, is currently employed by EMC. Ownership of
EMC common stock by our directors and officers or the position of employment by
Mr. Donatelli at EMC could create, or appear to create, potential conflicts of
interest when directors and officers are faced with decisions that could have
different implications for EMC and us.

   RISKS RELATING TO THE SECURITIES MARKETS AND OWNERSHIP OF OUR COMMON STOCK

SUBSTANTIAL SALES OF OUR COMMON STOCK MAY OCCUR AFTER THIS OFFERING, WHICH COULD
CAUSE OUR STOCK PRICE TO DECLINE.

     EMC currently intends to distribute the 81 million shares of our Class A
common stock it indirectly owns to EMC stockholders on a pro rata basis
approximately six to twelve months after this offering. Substantially all of
these shares will be eligible for immediate resale in the public market. We are
unable to predict whether significant amounts of our Class B common stock will
be sold in the open market in anticipation of, or following, this distribution.
We are also unable to predict whether a sufficient number of buyers of Class B
common stock will be in the market at that time. In addition, current holders of
our Class B common stock hold a substantial number of shares, which they will be
able to sell in the public market in the near future. Any sales of substantial
amounts of our Class B common stock in the public market, or the perception that
such sales might occur, whether as a result of EMC's distribution of the Class A
common stock or otherwise, could harm the market price of the Class B common
stock being offered by us.

OUR STOCK PRICE MAY BE VOLATILE AND YOU MAY NOT BE ABLE TO RESELL YOUR SHARES AT
OR ABOVE THE INITIAL PUBLIC OFFERING PRICE.

     There has been no public market for our Class B common stock prior to this
offering. The initial public offering price for our Class B common stock will be
determined through negotiations between the underwriters and us. This initial
public offering price may vary from the market price of our Class B common stock
after the offering. If you purchase shares of Class B common stock, you may not
be able to resell these shares at or above the initial public offering price.
The market price of our

                                       17
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Class B common stock may fluctuate significantly in response to factors, some of
which are beyond our control, including the following:

     - actual or anticipated fluctuations in our operating results;

     - changes in market valuations of other technology or other companies;

     - announcements by us or our competitors of significant technical
       innovations, product releases, contracts, acquisitions, strategic
       partnerships, joint ventures or capital commitments;

     - losses of major OEM customers, value added resellers or distributors;

     - additions or departures of key personnel; and

     - the distribution of our Class A common stock by EMC to its stockholders.

     In addition, the stock market has experienced extreme volatility that often
has been unrelated to the performance of particular companies. These market
fluctuations may cause the stock price of our Class B common stock to fall
regardless of our performance.

     You should read "Underwriting" for a more complete discussion of the
factors which were considered in determining the initial public offering price
of our Class B common stock.

OUR BUSINESS MAY BE HARMED BY CLASS ACTION LITIGATION DUE TO STOCK PRICE
VOLATILITY.

     In the past, securities class action litigation often has been brought
against companies following periods of volatility in the market price of their
securities. We may in the future be the target of similar litigation. Securities
litigation could result in substantial costs and divert management's attention
and resources and seriously harm our business, financial condition and results
of operations.

PROVISIONS IN OUR CHARTER DOCUMENTS AND DELAWARE LAW COULD PREVENT OR DELAY A
CHANGE IN CONTROL OF McDATA AND MAY REDUCE THE MARKET PRICE OF OUR COMMON STOCK.

     Provisions of our certificate of incorporation and by-laws may discourage,
delay or prevent a merger, acquisition or other business combination that a
stockholder may consider favorable. These provisions include:

     - authorizing the issuance of preferred stock without stockholder approval;

     - providing for a classified board of directors with staggered three year
       terms;

     - limiting the persons who may call special meetings of stockholders;

     - requiring super-majority voting for stockholder action by written
       consent;

     - establishing advance notice requirements for nominations for election to
       the board of directors and for proposing other matters that can be acted
       on by stockholders at stockholder meetings;

     - prohibiting cumulative voting for the election of directors; and

     - requiring super-majority voting to effect certain amendments to our
       certificate of incorporation and by-laws.

     We are incorporated in Delaware and certain provisions of Delaware law may
also discourage, delay or prevent someone from acquiring or merging with us,
which may cause the market price of our Class B common stock to decline.

CERTAIN PROVISIONS OF OUR AGREEMENTS WITH EMC RELATING TO OUR RELATIONSHIP WITH
EMC AFTER THE DISTRIBUTION BY EMC OF OUR CLASS A COMMON STOCK INDIRECTLY HELD BY
IT TO ITS STOCKHOLDERS MAY AFFECT THE OPERATION OF OUR BUSINESS, LIMIT OUR
ABILITY TO FINANCE OUR OPERATIONS, PREVENT A CHANGE IN CONTROL OF OUR COMPANY
AND REDUCE THE MARKET PRICE OF OUR CLASS B COMMON STOCK.

     Pursuant to the Tax Sharing Agreement between EMC and us, until 27 months
after the date of EMC's distribution of our Class A common stock indirectly held
by it to its stockholders, we may

                                       18
<PAGE>   21

not, without the consent of EMC or the receipt by EMC of a private letter ruling
from the Internal Revenue Service that the tax treatment of the distribution
will not be adversely affected:

     - enter into any transaction that would result in any person acquiring a
       50% or greater interest in us;

     - take or fail to take any other action which would cause the distribution
       to be taxable to EMC stockholders;

     - issue stock or other equity interests in us, or redeem or repurchase any
       of our capital stock which would involve the acquisition by one or more
       persons of more than 35% of our stock; or

     - undertake any transaction which would be treated as a liquidation or
       reorganization for tax purposes.

     These restrictions may prevent us from being acquired, either in a
negotiated transaction or otherwise, from using shares of our common stock as
payment in the acquisition by us of other companies, or from financing our
operations through sales of securities.

     In addition, we have agreed to indemnify EMC from taxes relating to the
failure of the distribution by EMC of our Class A common stock indirectly held
by it to its stockholders to be tax free if that failure results from, among
other things, any act or omission by us, any acquisition by a third party of any
of our stock or assets or any issuance by us of stock or any change in ownership
of our stock. As a result, we may be liable to EMC under the Tax Sharing
Agreement upon the occurrence of events that are beyond our control.

     Pursuant to the Master Confidential Disclosure and License Agreement
between EMC and us, EMC has granted us a license under existing EMC patents. If
we are acquired, our acquiror will retain this license as long as our acquiror
grants to EMC a license under all of the acquiror's patents for all products
licensed under the agreement under the same terms as the license we have granted
to EMC under the agreement. The loss of the license from EMC may make an
acquisition of us by a third party unlikely.

                                       19
<PAGE>   22

                  OUR RELATIONSHIP WITH EMC AFTER THE OFFERING

OVERVIEW

     After the completion of the offering described in this prospectus, EMC,
through its wholly-owned subsidiary, McDATA Holdings Corporation, will continue
to own 100% of our outstanding Class A common stock, which will represent,
following this offering, approximately      % of the combined voting power of
our Class A and Class B common stock, which are all classes of our voting stock.
Until EMC holds less than a majority of the combined voting power of our
outstanding common stock, EMC will be able to control the vote on all matters
submitted to stockholders, including the election of directors and the approval
of extraordinary corporate transactions. In addition, in the event that we issue
any securities of any class, or any other event occurs that would result in EMC
having less than 50% of the combined voting power of our capital stock, EMC has
the right to acquire a portion of those securities such that it will retain
greater than 50% of the combined voting power of our capital stock. As a result,
EMC can effectively retain, in its discretion, at least 50% of the combined
voting power of all our capital stock.

THE DISTRIBUTION BY EMC OF OUR CLASS A COMMON STOCK

     EMC currently plans to liquidate McDATA Holdings Corporation and to
distribute all of the shares of our Class A common stock to the holders of its
common stock approximately six to twelve months after the offering. However, EMC
is not obligated to complete the distribution, and we cannot assure you as to
whether or when it will occur.

     EMC has advised us that it will not complete the distribution if its board
of directors determines that the distribution is no longer in the best interests
of EMC and its stockholders. EMC has further advised us that it currently
expects that the principal factors it would consider in determining whether and
when to complete the distribution include:

     - the issuance by the Internal Revenue Service of a ruling that the
       proposed distribution would be tax-free to EMC and its stockholders;

     - the relative market prices of our Class B common stock and EMC's common
       stock;

     - the absence of any court orders or regulations prohibiting or restricting
       the completion of the distribution; and

     - other conditions affecting our business or that of EMC.

ANTICIPATED BENEFITS OF THE OFFERING AND DISTRIBUTION

     We believe that our contemplated complete separation from EMC will benefit
us by, among other things:

     - Facilitating future partnerships, combinations and other arrangements
       with other companies. As a separate company, we will have a greater
       ability to partner with other companies. In particular, certain companies
       that compete with EMC directly in the development and sale of products
       not currently developed and sold by us may be more willing to enter into
       arrangements with us as a separate company than they would with us prior
       to the separation.

     - Providing more direct access to capital markets.  As a public company, we
       will have more direct access to the capital markets to issue debt or
       equity securities and to grow through acquisitions.

                                       20
<PAGE>   23

     - Allowing us greater ability to develop the McDATA brand name.  As a
       separate company, we will be better able to build awareness of our McDATA
       brand as we position ourselves as the leading provider of enterprise-wide
       SAN switching solutions.

AGREEMENTS BETWEEN MCDATA AND EMC

     In October 1997, in connection with the reorganization of our business, we
entered into agreements with EMC relating to our business, our relationship with
EMC after the 1997 reorganization and the manufacture and supply of ESCON
switching devices for IBM. In addition, we have recently entered into agreements
with EMC in connection with this offering and EMC's contemplated distribution of
our Class A common stock to its stockholders that govern various ongoing
relationships between EMC and us, including agreements with respect to future
purchases of our products by EMC, information management, intellectual property,
tax sharing and other matters.

     These agreements were made in the context of a parent-subsidiary
relationship and were negotiated in the overall context of the 1997
reorganization, this offering and the proposed distribution by EMC of the shares
of our Class A common stock owned by it to its stockholders. The terms of these
agreements may be less favorable than those we could have negotiated with
unaffiliated third parties. For more information regarding the separation
arrangements, see "Arrangements between McDATA and EMC."

                                       21
<PAGE>   24

                INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

     This prospectus contains forward-looking statements. The forward-looking
statements are contained principally in the sections entitled "Prospectus
Summary," "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and "Business." These statements involve known and
unknown risks, uncertainties and other factors that may cause our actual
results, performance or achievements to be materially different from any future
results, performances or achievements expressed or implied by the
forward-looking statements.

     In some cases, you can identify forward-looking statements by terms such as
"may," "will," "should," "could," "would," "expects," "plans," "anticipates,"
"believes," "estimates," "projects," "predicts," "potential" and similar
expressions intended to identify forward-looking statements. These statements
reflect our current views with respect to future events and are based on
assumptions and subject to risks and uncertainties. Given these uncertainties,
you should not place undue reliance on these forward-looking statements. We
discuss many of these risks in greater detail in "Risk Factors." Also, these
forward-looking statements represent our estimates and assumptions only as of
the date of this prospectus.

     You should read this prospectus and the documents that we incorporate by
reference in this prospectus completely and with the understanding that our
actual future results may be materially different from what we expect. We
qualify all of our forward-looking statements by these cautionary statements.

                                       22
<PAGE>   25

                                USE OF PROCEEDS

     We estimate that our net proceeds from the sale of the      shares of our
Class B common stock that we are offering will be approximately $     , or
$     if the underwriters exercise their over-allotment option in full, at an
assumed initial public offering price of $     per share and after deducting
estimated underwriting discounts, commissions and our estimated offering
expenses.

     We expect to use $1.9 million of the net proceeds from the offering to
repay a promissory note in favor of McDATA Holdings Corporation in the principal
amount of $1.9 million, which bears interest at the prime rate and matures upon
the completion of this offering. We intend to use the remainder of the net
proceeds from this offering primarily for general corporate purposes, such as
working capital, capital expenditures, including a possible expenditure of
approximately $12.0 million to acquire approximately 90 acres of land in
Broomfield, Colorado, increased marketing expenses to establish the McDATA brand
and increased capital expenditures to support anticipated growth in operations.
Finally, we may use a portion of the net proceeds from this offering to acquire
or invest in businesses, technologies or services that are complementary to our
business. However, we have no present plans or commitments and are not engaged
in any negotiations with respect to any transaction of this type.

     We will retain broad discretion in the allocation and use of the net
proceeds of this offering. We intend to invest the remainder of the net proceeds
in short-term, interest bearing investment-grade securities.

                                DIVIDEND POLICY

     We have never declared or paid cash dividends on shares of our capital
stock. We intend to retain any future earnings to finance growth and do not
anticipate paying cash dividends in the foreseeable future.

                                       23
<PAGE>   26

                                 CAPITALIZATION

     The following table sets forth our capitalization as of March 31, 2000:

     - on an actual basis;

     - on an as adjusted basis to reflect the sale of shares of Class B common
       stock in this offering at an assumed initial public offering price of
       $          per share and the application of the net proceeds, after
       deducting estimated underwriting discounts and commissions, our estimated
       offering expenses and the repayment of short-term debt due parent.

     You should read this table together with "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and our consolidated
financial statements and the related notes appearing elsewhere in this
prospectus.

     The outstanding share information excludes 12,462,964 shares of our Class B
common stock issuable on exercise of options outstanding at March 31, 2000, with
a weighted average exercise price of $2.51 per share. In addition, as of March
31, 2000, 3,855,850 shares of our Class B common stock have been reserved for
issuance under our stock option plan.

<TABLE>
<CAPTION>
                                                               AS OF MARCH 31, 2000
                                                              -----------------------
                                                               ACTUAL     AS ADJUSTED
                                                              --------    -----------
                                                               (IN THOUSANDS, EXCEPT
                                                                    SHARE DATA)
<S>                                                           <C>         <C>
Short-term debt -- Parent...................................  $  1,900     $
                                                              --------
Long-term portion of capital lease obligations..............     1,137     $
Stockholders' equity:
  Preferred stock, $0.01 par value, no shares authorized and
     outstanding, actual; 25,000,000 shares authorized; and
     no shares issued or outstanding, as adjusted...........        --
  Common stock, Class A, $0.01 par value, 81,000,000 shares
     authorized; 81,000,000 shares issued and outstanding,
     actual; 250,000,000 shares authorized; and 81,000,000
     shares issued and outstanding, as adjusted.............       810
  Common stock, Class B, $0.01 par value; 29,000,000 shares
     authorized, actual; 12,681,186 shares issued and
     outstanding, actual; 200,000,000 shares authorized; and
            shares issued and outstanding, as adjusted......       127
  Additional paid-in capital................................    53,804
  Deferred compensation.....................................   (16,401)
  Accumulated deficit.......................................    (1,431)
                                                              --------
     Total stockholders' equity.............................    36,909
                                                              --------
     Total capitalization...................................  $ 38,046     $
                                                              ========
</TABLE>

                                       24
<PAGE>   27

                                    DILUTION

     The pro forma net tangible book value of all of our common stock as of
March 31, 2000 was approximately $36,025,000, or $0.38 per share of common
stock. Pro forma net tangible book value per share represents the amount of our
total tangible assets reduced by the amount of our total liabilities, divided by
93,681,186 shares of common stock outstanding at March 31, 2000. After giving
effect to our sales of           shares of Class B common stock in this offering
at an assumed initial offering price of $          per share and after deducting
the estimated underwriting discounts and commissions and our estimated offering
expenses, our net tangible book value at March 31, 2000 would have been
$          million or $          per share. This represents an immediate
increase in net tangible book value of $          per share to existing
stockholders and an immediate dilution in net tangible book value of $
per share to purchasers of common stock in this offering, as illustrated in the
following table:

<TABLE>
<S>                                                           <C>      <C>
Assumed initial public offering price per share of our Class
  B common stock............................................           $
  Net tangible book value per share as of March 31, 2000....  $0.38
  Increase in net tangible book value per share attributable
     to new investors.......................................
                                                              -----
Net tangible book value per share after this offering.......
                                                                       ----
Dilution per share to new investors.........................           $
                                                                       ====
</TABLE>

     The following table summarizes, on a pro forma basis, as of March 31, 2000,
the differences between the number of shares of common stock purchased from us,
the aggregate cash consideration paid to us and the average price per share paid
by existing stockholders and new investors purchasing shares of our Class B
common stock in this offering. The calculation below is based on an assumed
initial public offering price of $          per share, before deducting
estimated underwriting discounts and commissions and estimated offering expenses
payable by us:

<TABLE>
<CAPTION>
                                SHARES PURCHASED        TOTAL CONSIDERATION       AVERAGE
                             ----------------------    ----------------------    PRICE PER
                               NUMBER       PERCENT      AMOUNT       PERCENT      SHARE
                             -----------    -------    -----------    -------    ---------
<S>                          <C>            <C>        <C>            <C>        <C>
Existing stockholders......   93,681,186          %    $32,338,000                $ 0.35
New stockholders...........
                             -----------     -----     -----------     -----
  Total....................                  100.0%                    100.0%
                                             =====                     =====
</TABLE>

     As of March 31, 2000, there were options outstanding to purchase a total of
12,462,964 shares of our Class B common stock at a weighted average exercise
price of $2.51 per share. To the extent outstanding options are exercised, there
will be further dilution to new investors. For more information, see
"Management -- Employee Benefit Plans" and the notes to our consolidated
financial statements.

                                       25
<PAGE>   28

                      SELECTED CONSOLIDATED FINANCIAL DATA

     You should read the following selected consolidated financial data in
conjunction with our consolidated financial statements and related notes and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations," and other financial information appearing elsewhere in this
prospectus. The consolidated statements of operations data set forth below with
respect to the years ended December 31, 1997, 1998 and 1999, and the
consolidated balance sheets data as of December 31, 1998 and 1999 are derived
from our audited financial statements appearing elsewhere in this prospectus.
The consolidated statements of operations data set forth below with respect to
the years ended December 31, 1995 and 1996 and the consolidated balance sheets
data at December 31, 1995, 1996 and 1997 are derived from unaudited consolidated
financial statements not included in this prospectus. The consolidated
statements of operations data for the three months ended March 31, 1999 and 2000
and the consolidated balance sheet data as of March 31, 2000 are derived from
unaudited consolidated financial statements appearing elsewhere in this
prospectus, which, in the opinion of our management, reflect all normal
recurring adjustments that we consider necessary for a fair presentation of such
information in accordance with generally accepted accounting principles.
Historical results are not necessarily indicative of the results of any future
period.

<TABLE>
<CAPTION>
                                                                                                        THREE MONTHS
                                                                                                            ENDED
                                                               YEARS ENDED DECEMBER 31,                   MARCH 31,
                                                    -----------------------------------------------   -----------------
                                                    1995(1)   1996(1)   1997(1)    1998      1999      1999      2000
                                                    -------   -------   -------   -------   -------   -------   -------
                                                                   (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                 <C>       <C>       <C>       <C>       <C>       <C>       <C>
CONSOLIDATED STATEMENTS OF OPERATIONS DATA:
Product revenue...................................  $11,851   $ 5,370   $ 4,035   $ 5,242   $29,466   $ 2,943   $13,760
Product revenue -- Parent.........................       --       526     1,336     5,632    48,111     4,764    29,271
Service revenue -- Parent.........................   22,438    26,304    27,652    25,674    17,686     5,456     4,103
                                                    -------   -------   -------   -------   -------   -------   -------
Total revenue.....................................  $34,289   $32,200   $33,023   $36,548   $95,263   $13,163   $47,134
Total cost of revenue.............................    9,907     8,004    11,270    13,105    49,571     6,090    22,171
                                                    -------   -------   -------   -------   -------   -------   -------
Gross profit......................................   24,382    24,196    21,753    23,443    45,692     7,073    24,963
                                                    -------   -------   -------   -------   -------   -------   -------
Operating expense.................................   19,955    15,265    22,983    32,008    45,965     9,081    16,096
                                                    -------   -------   -------   -------   -------   -------   -------
Income (loss) from operations.....................    4,427     8,931    (1,230)   (8,565)     (273)   (2,008)    8,867
                                                    -------   -------   -------   -------   -------   -------   -------
Net income (loss).................................  $ 2,805   $ 5,770   $(3,224)  $(2,468)  $(1,033)  $(1,980)  $ 5,312
                                                    =======   =======   =======   =======   =======   =======   =======
Basic net income (loss) per share.................  $  0.03   $  0.06   $ (0.04)  $ (0.03)  $ (0.01)  $ (0.02)  $  0.06
                                                    =======   =======   =======   =======   =======   =======   =======
Shares used in computing basic net income (loss)
  per share(2)....................................   91,000    91,000    91,000    91,000    91,638    91,014    93,084
                                                    =======   =======   =======   =======   =======   =======   =======
Diluted net income (loss) per share(2)............  $  0.03   $  0.06   $ (0.04)  $ (0.03)  $ (0.01)  $ (0.02)  $  0.05
                                                    =======   =======   =======   =======   =======   =======   =======
Shares used in computing diluted net income (loss)
  per share(2)....................................   91,000    91,000    91,000    91,000    91,638    91,014    99,103
</TABLE>

<TABLE>
<CAPTION>
                                                                             DECEMBER 31,
                                                            -----------------------------------------------   MARCH 31,
                                                             1995      1996      1997      1998      1999       2000
                                                            -------   -------   -------   -------   -------   ---------
                                                                            (IN THOUSANDS)
<S>                                                         <C>       <C>       <C>       <C>       <C>       <C>
CONSOLIDATED BALANCE SHEET DATA:
Total assets..............................................  $22,558   $26,593   $36,813   $39,383   $48,350    $57,746
Working capital...........................................    7,853    13,092    22,016    14,028    15,739     22,598
Debt payable to parent....................................       --        --     1,900     1,900     1,900      1,900
Long-term portion of capital lease obligations............      550       388       335     1,262     1,175      1,137
Total stockholders' equity................................   10,660    16,431    28,465    25,999    29,550     36,909
</TABLE>

-------------------------
(1) In October 1997, EMC reorganized McDATA to separate our fibre channel
    devices business from EMC. As part of this reorganization, we became a
    company focused on designing, developing, manufacturing and selling fibre
    channel switching devices. As a result, the historical financial information
    for the three years ended December 31, 1997 has been adjusted to reflect the
    impact of the reorganization as if it occurred at the beginning of 1995.
(2) Per share computations for 1995, 1996 and 1997 have been calculated using
    the actual number of shares issued on October 1, 1997 as the capital
    structure for prior periods was not indicative of the current structure.

                                       26
<PAGE>   29

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     You should read the following discussion and analysis in conjunction with
"Selected Consolidated Financial Data" and our consolidated financial statements
and the related notes appearing elsewhere in this prospectus.

OVERVIEW

     We were acquired by EMC in December 1995. In October 1997, EMC reorganized
our company to separate our fibre channel switching devices business from EMC.
At that time we were re-incorporated in Delaware and became an indirect,
majority-owned subsidiary of EMC through its direct, wholly-owned subsidiary,
McDATA Holdings Corporation. As part of the reorganization, we became a company
focused on designing, developing, manufacturing and selling fibre channel
switching devices that enable enterprise-wide high performance SANs. We also
continue to provide services for McDATA Holdings Corporation's ESCON switch
business under a services agreement. Since 1997, when we focused our business on
fibre channel switching devices, we have incurred losses in all but the two most
recent fiscal quarters.

     We are a provider of fibre channel switching solutions for enterprise
storage applications. We sell our switching solutions through leading OEMs, such
as EMC, and resellers, such as IBM. In addition, we have recently entered into a
distribution agreement with Hitachi Data Systems. We also sell our products and
services to distribution channel partners, including solutions providers and
systems integrators, who combine our switching products with other system
elements and services for enterprise data centers. In addition, we provide
manufacturing and distribution management services to McDATA Holdings
Corporation for ESCON switching solutions manufactured for and sold exclusively
to IBM. In 1998 and 1999, revenues from EMC were approximately 86% and 69% of
our total revenues, respectively; revenues from Hewlett-Packard were
approximately 3% and 13% of our total revenues, respectively, and revenues from
IBM were approximately 2% and 11% of our total revenues, respectively. Although
we plan to expand our target customer base in 2000 and 2001, we may not be
successful in our efforts to diversify our product offerings and introduce these
products to a larger number of customers.

     We currently derive substantially all of our revenues from a limited number
of products. During 1998 and 1999, substantially all of our revenues were
derived from sales of our ED-5000 Enterprise Fibre Channel Director, our ES-2500
Enterprise Fibre Channel Switch and the FICON Bridge card sold exclusively to
IBM.

     We generally recognize product revenue when products are shipped to
customers. We do not provide our customers with product return programs.
Reserves for warranty repairs are provided based upon historical warranty
repairs experience. Service and maintenance revenues are recognized as earned.

     We do not have long term purchase commitments from our customers. Our
customer contracts typically contain provisions regarding pricing, rescheduling,
order cancellation, warranties, licensing, limitations of liability and field
support. In addition, our OEM customer contracts typically contain further
provisions regarding product specifications, manufacturing, labeling, shipping
arrangements and forecasts.

     Our gross profit percentage may be impacted by changes in average unit
selling prices due to competitive pressures, fluctuations in manufacturing
volumes, the mix of products sold and the introduction of new products.
Additionally, our future gross profit percentage may be impacted by the mix of
distribution channels through which our products are sold. We expect our gross
profit

                                       27
<PAGE>   30

percentage from product sales to EMC to decline in future periods as a result of
recently negotiated pricing on future products, partially offset by expected
declines in unit manufacturing costs.

     We currently outsource a significant portion of the manufacturing of the
components that are used in our products to SCI Systems, Inc., a third-party
manufacturer. A significant portion of our cost of revenues consists of payments
to SCI. Our agreement with SCI provides for rolling purchase orders and rolling
six month forecasts. Component purchase prices are typically negotiated on an
ongoing basis. We are liable for materials that SCI purchases on our behalf that
are not consumed in preparing components for us and cannot be redirected to
other uses by SCI. We conduct final test and assembly, manufacturing,
engineering, quality assurance and repair at our primary manufacturing facility
in Louisville, Colorado.

     Research and development expenses consist primarily of salaries and related
personnel expenses, materials used in fabrication of prototype equipment, fees
paid to consultants, testing agencies and other service providers, design tools
and equipment, and computer support services expenses. We believe that continued
investment in research and development is critical to the success of our future
operations.

     Selling and marketing expenses consist primarily of salaries, commissions
and related personnel expenses, fees paid to consultants, advertisers and other
service providers, and travel expenses. We expect selling and marketing expenses
to increase as we add field sales personnel in order to expand market awareness
and generate increased sales of our products. However, we cannot give any
assurances that increased expenditures will result in higher net revenues.

     General and administrative expenses consist primarily of salaries and
related personnel expenses, fees paid for legal, accounting and other
professional services, and other general corporate expenses. We expect general
and administrative expenses to increase as we add personnel and incur costs
related to the anticipated growth of our business and the infrastructure
required to operate as a public company.

                                       28
<PAGE>   31

                             RESULTS OF OPERATIONS

     The following table sets forth certain financial data for the periods
indicated as a percentage of total revenues.

<TABLE>
<CAPTION>
                                                         YEARS ENDED            THREE MONTHS
                                                         DECEMBER 31,          ENDED MARCH 31,
                                                   ------------------------    ---------------
                                                   1997      1998     1999      1999     2000
                                                   -----    ------    -----    ------    -----
<S>                                                <C>      <C>       <C>      <C>       <C>
Revenue:
  Product revenue................................   12.2%     14.3%    30.9%     22.4%    29.2%
  Product revenue -- Parent......................    4.0      15.4     50.5      36.2     62.1
  Service revenue -- Parent......................   83.8      70.3     18.6      41.4      8.7
                                                   -----    ------    -----    ------    -----
     Total revenue...............................  100.0     100.0    100.0     100.0    100.0
Cost of revenue:
  Cost of product revenue........................   13.0      10.4     22.1      16.8     16.3
  Cost of product revenue -- Parent..............    2.1       8.8     24.0      18.8     28.3
  Cost of service revenue -- Parent..............   19.0      16.7      5.9      10.7      2.5
                                                   -----    ------    -----    ------    -----
     Total cost of revenue.......................   34.1      35.9     52.0      46.3     47.1
                                                   -----    ------    -----    ------    -----
Gross profit.....................................   65.9      64.1     48.0      53.7     52.9
                                                   -----    ------    -----    ------    -----
Operating expenses:
  Research and development.......................   50.0      50.1     25.2      36.0     16.2
  Selling and marketing..........................   11.4      28.2     16.6      25.4     12.4
  General and administrative.....................    8.2       9.3      4.1       6.5      2.9
  Amortization of deferred compensation..........     --        --      2.4       1.1      2.6
                                                   -----    ------    -----    ------    -----
     Total operating expenses....................   69.6      87.6     48.3      69.0     34.1
                                                   -----    ------    -----    ------    -----
Income (loss) from operations....................   (3.7)    (23.4)    (0.3)    (15.3)    18.8
Interest income (expense), net...................    1.0       0.8     (0.9)     (1.4)    (0.1)
                                                   -----    ------    -----    ------    -----
Income (loss) before income taxes................   (2.7)    (22.6)    (1.2)    (16.7)    18.7
Income tax expense (benefit).....................    7.1     (15.8)      --      (1.6)     7.5
                                                   -----    ------    -----    ------    -----
Net income (loss)................................   (9.8)%    (6.8)%   (1.2)%   (15.1)%   11.2%
                                                   =====    ======    =====    ======    =====
</TABLE>

  Three Months ended March 31, 1999 and 2000

     Revenue

     Total revenue increased by approximately 258% to $47.1 million for the
three months ended March 31, 2000 from $13.2 million for the three months ended
March 31, 1999. This increase was primarily due to increased unit sales of
McDATA's ED-5000 Enterprise Fibre Channel Director sold primarily to EMC and of
the FICON Bridge card sold exclusively to IBM. This increase was offset in part
by a decline in revenue under the ESCON service agreement of 30% from the first
three months of 1999 compared to the comparable period in 2000 due to reduced
sales of ESCON switch products by McDATA Holdings Corporation. We anticipate
that service revenue from McDATA Holdings Corporation, which relate to sales of
ESCON products to IBM, will continue to decrease in the future. As ESCON revenue
continues to decrease we anticipate that they will represent an increasingly
smaller percentage of total revenue.

     Gross Profit

     Gross profit increased by approximately 253% to $25.0 million for the three
months ended March 31, 2000 from $7.1 million for the three months ended March
31, 1999. Gross profit

                                       29
<PAGE>   32

percentages were relatively unchanged between the periods. Gross profit
percentages on product sales were approximately 51% in the three months ended
March 31, 2000, compared to approximately 39% in the comparable period of 1999,
reflecting much higher proportion from sales of our ED-5000 product in the
current year period, which has earned significantly higher profits than the mix
of products sold in the prior year period. The increase in gross profit
percentage reflects increased sales of fibre channel products in the first three
months of 2000, partially offset by increased manufacturing expenses and reduced
gross profit attributable to the decline in ESCON service contract fee revenue.
We expect our gross profit percentage from product sales to EMC to decline in
future periods as a result of recently negotiated pricing on future products
partially offset by expected declines in unit manufacturing costs. Manufacturing
expenses increased in the first three months of 2000 compared to the comparable
period in 1999 due to expenses associated with reengineering production
processes and increased manufacturing staffing levels to accommodate production
of multiple fibre channel product lines simultaneously.

     Operating Expenses

     Research and Development.  Research and development expenses increased by
approximately 61% to $7.6 million for the first three months of 2000 from $4.7
million for the first three months of 1999. The increase was due primarily to
increased staffing levels and higher expenditures for prototype materials and
design consulting services in the 2000 period.

     Selling and Marketing.  Selling and marketing expenses increased by
approximately 75% to $5.9 million for the first three months of 2000 from $3.3
million for the first three months of 1999. This increase was due primarily to
increases in field sales personnel and the costs of equipment for product
demonstration facilities, system integration activities, customer educational
facilities and compensation plans for field sales personnel.

     General and Administrative.  General and administrative expenses increased
by approximately 58% to $1.4 million for the first three months of 2000 from
$0.9 million for the first three months of 1999. This increase primarily
resulted from increased staffing levels and costs associated with the
implementation of a new business system.

     Amortization of Deferred Compensation.  During 1999, we recorded deferred
compensation of $19.8 million in connection with stock option grants. We are
amortizing this amount on a straight-line basis over the vesting period of the
applicable options, resulting in amortization expense of $0.1 million and $1.2
million in the three months ended March 31, 1999 and 2000, respectively.

     Provision for Income Taxes.  The effective tax rates for the three months
ended March 31, 2000 and 1999 were 39.9% and 9.8%, respectively. The effective
tax rate in 2000 increased primarily due to the amortization of deferred
compensation, which is not deductible for income tax purposes. As we become
independent of the consolidated EMC group for tax filing purposes, we expect our
tax rates to approximate statutory federal and state income tax rates.

  Years Ended December 31, 1997, 1998 and 1999

     Revenue

     Product revenue, including sales to EMC, increased approximately 613% to
$77.6 million for the year ended December 31, 1999 from $10.9 for the year ended
December 31, 1998. Product revenue, including unit sales to EMC, increased
approximately 102% to $10.9 million for the year ended December 31, 1998 from
$5.4 million for the year ended December 31, 1997. These increases primarily
reflect increased sales of our ED-5000 Fibre Channel Director to EMC and the
FICON Bridge card to IBM during 1998 and 1999. Service revenue from McDATA
Holdings Corporation, which consist of fees earned under McDATA's service fee
arrangement for producing ESCON director products, decreased approximately 31%
to $17.7 million for the year ended December 31, 1999 from $25.7 million for the
year ended December 31, 1998. Service revenue from EMC

                                       30
<PAGE>   33

decreased by approximately 7% to $25.7 million for the year ended December 31,
1998 from $27.7 million in the year ended December 31, 1997. Actual revenue
realized from McDATA's service fee arrangement have declined due to reduced
shipments of ESCON director products in 1998 and 1999 in comparison to 1997. We
anticipate that service fees from McDATA Holdings Corporation will continue to
decrease.

     Gross Profit

     Our gross profit increased approximately 95% to $45.7 million for the year
ended December 31, 1999 from $23.4 million for the year ended December 31, 1998.
Our gross profit increased approximately 8% to $23.4 million for the year ended
December 31, 1998 from $21.8 million for the year ended December 31, 1997. Our
gross profit percentage decreased to 48% in 1999, from 64% in 1998. This
decrease in gross profit percentage is primarily due to the change in mix
between products and sales service fees. Gross profit percentage on the service
fee arrangement has exceeded those earned from product sales. Gross profit
percentage on product revenue in 1999 of approximately 43% increased from 1998,
reflecting a larger component of 1999 activity attributable to sales of McDATA's
director class product; the gross profit percentage on the director class
product is higher than the margins earned on non-director class products
manufactured by third parties and resold by McDATA. We expect our gross profit
percentage from product sales to EMC to decline as a result of recently
negotiated pricing on future products, partially offset by expected declines in
unit manufacturing costs. Our gross profit percentage decreased to 64% for the
year ended December 31, 1998 from 66% for the year ended December 31, 1997. This
decrease primarily reflects reductions in both service fees earned and in gross
profit percentage realized from the service fee arrangement. The decline in
gross profit percentage from the service fee arrangement partially reflects
generally higher manufacturing expenses incurred by McDATA in preparation for
the simultaneous production of multiple fibre channel product lines.

     Operating Expenses

     Research and Development.  Research and development expenses increased
approximately 31% to $24.0 million in the year ended December 31, 1999 from
$18.3 million in year ended December 31, 1998. Research and development
increased approximately 11% to $18.3 million in the year ended December 31, 1998
from $16.5 million in the year ended December 31, 1997. These increased expenses
primarily reflect increased staffing levels and expenses related to the
completion of development for fibre channel products introduced during 1998 and
1999.

     Selling and Marketing.  Selling and marketing expenses increased
approximately 53% to $15.8 million in the year ended December 31, 1999 from
$10.3 million in year ended December 31, 1998. Selling and marketing expenses
increased approximately 175% to $10.3 million in the year ended December 31,
1998 from $3.7 million in the year ended December 31, 1997. The increase in 1998
reflects increased staffing and increased use of market data and public
relations consultants. The increased expenditures in 1999 primarily reflect
increased staffing levels, establishment of compensation plans related to field
sales and support activities and investments in demonstration equipment and
facilities.

     General and Administrative.  General and administrative expenses increased
approximately 16% to $3.9 million in the year ended December 31, 1999 from $3.4
million in the year ended December 31, 1998. General and administrative expenses
increased approximately 25% to $3.4 million in the year ended December 31, 1998
from $2.7 million in the year ended December 31, 1997. The increase in
expenditures from 1997 to 1998 reflected expenses incurred during 1998 related
to implementing a new business system and redeploying personnel and fixtures
within our facilities. The

                                       31
<PAGE>   34

increased expenditures in 1999 primarily reflected increased staffing levels and
increased expenditures in facilities and networking equipment to support our
overall expansion in staffing levels.

     Amortization of Deferred Compensation.  During 1999, we recorded deferred
compensation of $19.8 million in connection with stock option grants. We are
amortizing this amount on a straight-line basis over the vesting period of the
applicable options, resulting in amortization expense of $2.2 million in 1999.
No compensation was recorded in 1997 or 1998.

     Provision for Income Taxes.  The effective tax rates for 1997, 1998 and
1999, were (261.8)%, 70.1%, and 9.8%, respectively. These rates are not
indicative of our future expected effective tax rates. At December 31, 1997, we
had recorded a valuation allowance for the full amount of estimated deferred tax
assets. Management estimated that it was more likely than not that such benefits
would not be realized based upon our operating history, thus negating the impact
of tax benefits for 1997. As of December 31, 1998, management determined that a
valuation allowance was no longer required (see Note 10 to the Consolidated
Financial Statements). The effective tax rate for 1999 was significantly reduced
by the portion of the pre-tax loss associated with amortization of deferred
compensation, a portion of which is not deductible for income tax purposes.
Following EMC's contemplated distribution of all of its shares of our Class A
common stock, with the exception of the effects related to deferred
compensation, we anticipate that our effective federal tax rate will approximate
the statutory tax rate.

                                       32
<PAGE>   35

QUARTERLY RESULTS OF OPERATIONS

     The following tables set forth certain unaudited statement of operations
data for each of the five quarters ended March 31, 2000, as well as such data
expressed as a percentage of our total revenue for the quarters presented. This
unaudited quarterly information has been prepared on the same basis as our
audited financial statements and, in management's opinion, reflects all normal
recurring adjustments that we consider necessary for a fair presentation of the
information for the periods presented. Operating results for any quarter are not
necessarily indicative of results for any future period.

<TABLE>
<CAPTION>
                                                                THREE MONTHS ENDED
                                               -----------------------------------------------------
                                               MAR. 31,   JUN. 30,   SEPT. 30,   DEC. 31,   MAR. 31,
                                                 1999       1999       1999        1999       2000
                                               --------   --------   ---------   --------   --------
                                                                  (IN THOUSANDS)
<S>                                            <C>        <C>        <C>         <C>        <C>
Revenue:
  Product revenue............................  $ 2,943    $ 6,615     $ 6,550    $13,358    $13,760
  Product revenue -- Parent..................    4,764      8,500      13,211     21,636     29,271
  Service revenue -- Parent..................    5,456      5,912       2,900      3,418      4,103
                                               -------    -------     -------    -------    -------
     Total revenue...........................  $13,163    $21,027     $22,661    $38,412    $47,134
Cost of revenue:
  Cost of product sales......................    2,210      4,852       4,449      9,529      7,675
  Cost of product sales -- Parent............    2,477      3,922       6,099     10,399     13,329
  Cost of services -- Parent.................    1,403      1,413       1,401      1,417      1,167
                                               -------    -------     -------    -------    -------
     Total cost of revenue...................    6,090     10,187      11,949     21,345     22,171
                                               -------    -------     -------    -------    -------
Gross profit.................................    7,073     10,840      10,712     17,067     24,963
                                               -------    -------     -------    -------    -------
Operating expenses:
  Research and development...................    4,739      5,582       6,529      7,151      7,644
  Selling and marketing......................    3,341      3,760       3,723      4,963      5,856
  General and administrative.................      859        974       1,081      1,026      1,357
  Amortization of deferred compensation......      142        300         676      1,119      1,239
                                               -------    -------     -------    -------    -------
     Total operating expenses................    9,081     10,616      12,009     14,259     16,096
                                               -------    -------     -------    -------    -------
Income (loss) from operations................   (2,008)       224      (1,297)     2,808      8,867
Net interest expense.........................     (186)      (239)       (284)      (163)       (35)
                                               -------    -------     -------    -------    -------
Income (loss) before income taxes............   (2,194)       (15)     (1,581)     2,645      8,832
Income tax expense (benefit).................     (214)        (2)       (155)       259      3,520
                                               -------    -------     -------    -------    -------
Net income (loss)............................  $(1,980)   $   (13)    $(1,426)   $ 2,386    $ 5,312
                                               =======    =======     =======    =======    =======
</TABLE>

                                       33
<PAGE>   36

<TABLE>
<CAPTION>
                                                     AS A PERCENTAGE OF TOTAL REVENUES
                                      ---------------------------------------------------------------
                                      MARCH 31,   JUNE 30,   SEPTEMBER 30,   DECEMBER 31,   MARCH 31,
                                        1999        1999         1999            1999         2000
                                      ---------   --------   -------------   ------------   ---------
<S>                                   <C>         <C>        <C>             <C>            <C>
Revenue:
  Product revenue...................     22.4%      31.5%         28.9%          34.8%         29.2%
  Product revenue -- Parent.........     36.2       40.4          58.3           56.3          62.1
  Service revenue -- Parent.........     41.4       28.1          12.8            8.9           8.7
                                        -----      -----         -----          -----         -----
     Total revenue..................    100.0      100.0         100.0          100.0         100.0
Cost of revenue:
  Cost of product revenue...........     16.8       23.1          19.6           24.8          16.3
  Cost of product
     revenue -- Parent..............     18.8       18.7          26.9           27.1          28.3
  Cost of service
     revenue -- Parent..............     10.7        6.7           6.2            3.7           2.5
                                        -----      -----         -----          -----         -----
     Total cost of revenue..........     46.3       48.4          52.7           55.6          47.1
                                        -----      -----         -----          -----         -----
Gross profit........................     53.7       51.6          47.3           44.4          52.9
                                        -----      -----         -----          -----         -----
Operating expenses:
  Research and development..........     36.0       26.6          28.8           18.6          16.2
  Sales and marketing...............     25.4       17.9          16.4           12.9          12.4
  General and administrative........      6.5        4.6           4.8            2.7           2.9
  Amortization of deferred
     compensation...................      1.1        1.4           3.0            2.9           2.6
                                        -----      -----         -----          -----         -----
     Total operating expenses.......     69.0       50.5          53.0           37.1          34.1
                                        -----      -----         -----          -----         -----
Loss from operations................    (15.3)       1.1          (5.7)           7.3          18.8
Interest (expense), net.............     (1.4)      (1.2)         (1.3)          (0.4)         (0.1)
                                        -----      -----         -----          -----         -----
Loss before income taxes............    (16.7)      (0.1)         (7.0)           6.9          18.7
Income tax expense (benefit)........     (1.6)        --          (0.7)           0.7           7.5
                                        -----      -----         -----          -----         -----
Net income (loss)...................    (15.1)%     (0.1)%        (6.3)%          6.2%         11.2%
                                        =====      =====         =====          =====         =====
</TABLE>

     Revenue.  The increases in our total product revenue in each of the five
quarters presented above primarily reflect quarterly increases in unit shipment
volumes of our ED-5000 Fibre Channel Director and FICON Bridge card products.
The quarter-to-quarter changes in service revenue from McDATA Holdings
Corporation reflect changes in the shipments of ESCON products to IBM.

     Gross Profit.  Our gross profit in the three months ended June 30, 1999 and
September 30, 1999 increased to $10.8 million and $10.7 million, respectively,
from $7.1 million in the three months ended March 31, 1999 primarily due to
increased product revenue, including sales to EMC. Our gross profit in the three
months ended December 31, 1999 increased to $17.1 million, primarily due to
increased product revenues, including sales to EMC. Our gross profit percentage
in the three months ended December 31, 1999 of approximately 44% was less than
the prior quarters due to costs associated with inventory writeoffs and order
cancellation fees for a discontinued product. Our gross profit in the three
months ended March 31, 2000 increased to $25.0 million, primarily reflecting
increased products sold to EMC. We expect our gross profit percentage from
product sales to EMC to decline in future periods as a result of recently
negotiated pricing on future products, partially offset by expected declines in
unit manufacturing costs.

                                       34
<PAGE>   37

     Operating Expenses.  Operating expenses increased each of the last five
quarters primarily due to increased staffing levels and other expenditures in
research and development and sales and marketing. We expect costs in these areas
to continue to increase.

LIQUIDITY AND CAPITAL RESOURCES

     We have funded our operations through first quarter 2000 primarily through
funds received from McDATA Holdings Corporation and John F. McDonnell in
exchange for our capital stock in connection with our reorganization in October
1997, and borrowings from EMC. Cash generated from operations was $7.6 million
for the year ended December 31, 1999, reflecting improved results from
operations during the second half of 1999. Cash provided by operations in the
three months ended March 31, 2000 of $3.5 million funded our expenditures for
personnel, equipment and services to continue expansion of our fibre channel
business.

     Our principal sources of liquidity at March 31, 2000 consisted of our
equipment financing arrangements and further borrowings from EMC. These
borrowings are unsecured, bear interest at the prime rate as published in the
Wall Street Journal, which was 9.0% at March 31, 2000. Borrowings under our
equipment financing arrangements are secured by the related capital equipment
and are payable through March 31, 2003. We intend to repay $1.9 million borrowed
from McDATA Holdings Corporation with a portion of the net proceeds of this
offering.

     We believe the net proceeds of this offering, together with existing cash
balances and borrowing facilities to be negotiated with a bank, will be
sufficient to meet our capital and operating requirements at least through the
next twelve months, although we could be required, or could elect, to seek
additional funding prior to that time. We have signed a letter of intent to
acquire approximately 90 acres of land in Broomfield, Colorado for a cost of
approximately $12.0 million. We may use proceeds from this offering to complete
the purchase of this property. Our future capital requirements will depend on
many factors, including our rate of revenue growth, the timing and extent of
spending to support development of new products and expansion of sales and
marketing, the timing of new product introductions and enhancements to existing
products, and market acceptance of our products.

YEAR 2000 COMPLIANCE

     The year 2000 issue arises from the ability of computer programs to
distinguish 21st century dates from 20th century dates due to the two digit date
fields used by many systems. Failure to distinguish these dates properly could
result in system failures or disruptions of operations for companies using these
computer programs or hardware. Many companies' computer systems may still need
to be upgraded or replaced in order to avoid year 2000 issues.

     We, our suppliers, our customers and other third parties we rely upon use a
wide variety of information technologies, computer systems and other equipment
containing computer chips dedicated to a specific task. As of May 24, 2000,
neither we nor, to our knowledge, any of the third parties we depend upon, have
experienced any material problems associated with the year 2000 issue. If we or
these third parties experience problems in the future as a result of any year
2000-related issues, our operations could be adversely affected. We will face
year 2000 risks if we encounter undetected errors or defects in systems used by
us to run our business, including information systems, equipment and facilities
or if our suppliers encounter undetected errors or defects in systems used by
them. We currently are unable to estimate the duration and extent of any
potential year 2000 issues that may affect us, or estimate the effect that any
such issues may have on our future revenue. We cannot be certain that year 2000
issues will not have a material adverse impact on us.

                                       35
<PAGE>   38

INFLATION

     We believe that our revenue and results of operations have not been
significantly impacted by inflation during the last three fiscal years.

RECENT ACCOUNTING PRONOUNCEMENT

     In December 1999, the Securities and Exchange Commission issued Staff
Accounting Bulletin No. 101 "Revenue Recognition in Financial Statements", as
amended. SAB 101 summarizes certain of the Securities and Exchange Commission's
views in applying generally accepted accounting principles to revenue
recognition in financial statements. McDATA has applied the provisions of SAB
101 in the consolidated financial statements. The adoption of SAB 101 did not
have a material impact on McDATA's financial condition or results of operations.

QUALITATIVE AND QUANTITATIVE DISCLOSURE ABOUT MARKET RISK

     Our interest income is sensitive to changes in the general level of U.S.
interest rates, as all of our investments are in cash equivalents. Due to the
nature of our short-term investments, we do not believe that we have had
material exposure to market risk. Therefore, no quantitative tabular disclosures
are presented.

                                       36
<PAGE>   39

                                    BUSINESS

OVERVIEW

     We are the leading provider of high availability director class switching
solutions for connecting servers and storage systems. We design, develop,
manufacture and sell switching devices that enable enterprise-wide high
performance storage area networks, or SANs. Our products enable enterprises to
cost-effectively manage growth in storage capacity requirements, improve the
networking performance of their servers and storage systems, and scale the size
and scope of their SAN or other information infrastructure while allowing them
to operate data-intensive applications on the SAN. We sell our products through
industry leading original equipment manufacturers, or OEMs, and resellers,
including EMC Corporation and International Business Machines Corporation, or
IBM, as well as systems integrators. We are focused on becoming the leading
provider of enterprise-wide SAN switching solutions.

INDUSTRY BACKGROUND

  Significant growth in critical data requirements

     During the past decade, the volume and value of data created throughout the
enterprise has increased dramatically. As a result, the demand for data storage
capacity has exploded as enterprises increasingly need to access, process and
manipulate data. International Data Corporation, an independent information
technology research firm referred to as IDC, estimates that multi-user disk
storage grew from more than 7,000 terabytes in 1993 to more than 185,000
terabytes in 1999, and will reach more than 1.9 million terabytes in 2003. This
growth in the volume of data storage has been driven by a number of factors
including:

     - the rapid expansion of data intensive applications such as e-mail, data
       mining and enterprise resource planning, or ERP;

     - the increase in complexity of enterprise computing environments and use
       of multiple, incompatible servers and operating systems;

     - the need to store redundant copies of enterprise data for business
       continuance applications;

     - the increase in the number of users accessing the network;

     - the growth of e-commerce;

     - the rapid growth of web hosting, digital video and other multimedia
       applications; and

     - the decline in the cost of storage as a result of advances in storage
       technology.

     In addition, organizations have recognized that rapid and reliable access
to enterprise data 24 hours a day, 7 days a week, 365 days a year (24 X 7) is
essential to operating a business. The growing dependence on data for
fundamental business processes has greatly increased the number of input-output
transactions, or I/O's, required of storage servers and systems. The continued
deployment of client-server and Internet-based applications combined with the
rapid growth of enterprise data has placed significant strain on traditional
data storage architectures. Furthermore, the increased use of open-system
computing environments, which link multiple applications, files and databases to
networked computers, makes the task of data management increasingly difficult.
As a result, data storage products and services have accounted for an increasing
percentage of the enterprise's information technology budgets and management
resources.

     Enterprises have historically attempted to support and manage data
requirements by directly attaching storage devices to the individual servers on
a local area network, or LAN. Servers communicate in this direct attached
environment using the small computer systems interface, or SCSI. The SCSI
protocol, however, has several drawbacks, including a short transport distance,

                                       37
<PAGE>   40

limited performance and capacity of the connection, limited configuration
flexibility, low reliability and inability to support more than a limited number
of connections. According to IDC, advances in technology increased LAN
transmission speeds by 100 times during the 1990's, while storage-to-server data
transmission speeds utilizing the SCSI I/O interface have increased less than 20
times during this period. The result has been a significant bandwidth bottleneck
between storage systems and servers.

     To address the limitations of traditional server-to-storage connections,
fibre channel technology and interconnect standards evolved in the early 1990's
to enable new high-performance storage connectivity. Fibre channel connectivity
enables the efficient and reliable transfer of data from one network device to
another, allowing access from any server to any storage device on the network.
Fibre channel offers the connectivity, distance and access benefits of a
network, combined with the high performance and increased capacity of a channel.
Since its introduction, fibre channel technology has earned widespread
acceptance from industry and independent testing organizations. IDC forecasts
that the market for fibre channel host bus adapters, hubs and switches will
exceed $4 billion by 2003.

  The emergence of storage area networks (SANs)

     The introduction of fibre channel technology to facilitate high performance
storage connectivity has enabled the development of SANs. SANs enable fast,
efficient and reliable transfer of data between multiple storage devices and
servers to improve the management of data within an enterprise. SANs also enable
the traffic from storage applications to be handled independently from a local
area network, which enhances the LAN's performance. SANs advance the traditional
SCSI-based direct attached storage and server configuration to a network of
storage devices that can be accessed by multiple servers and network users,
significantly increasing the performance and availability of enterprise data
storage.

     SAN's are typically configured in either a switched fabric or arbitrated
loop topology. Fabric configurations enable full network bandwidth for every
device on the network. Additionally, fabric configurations enable enterprises to
connect any device on the network to any other device on the network. Arbitrated
loop configurations share network bandwidth among all devices on the network,
resulting in performance degradation as the number of devices in the loop
increases.

     A SAN incorporates one or more classes of networking devices that enable
the interconnection of the SAN with server and storage devices. These devices
are:

     - Storage Director -- the backbone device that enables the broadest
       connectivity of servers and storage devices in a SAN configuration. It
       has the highest bandwidth performance and provides the highest number of
       ports per size of device (which is referred to as port density) of all
       SAN networking devices. A director class switch, unlike other types of
       SAN networking devices, has fault tolerant technology and redundancy
       built throughout its design. Storage directors support a fabric
       configuration and provide a highly available platform for a centralized
       SAN management system. Directors can be used in configurations that
       connect large numbers of servers with multi-terabyte storage arrays in
       either a fabric or arbitrated loop configuration.

     - Storage Switch -- a device that addresses typical department level
       requirements to connect a range of server and storage devices with less
       capability than a director. Storage switches provide increased
       flexibility in building larger SAN configurations and higher performance
       than storage hubs. Typical configurations connect a limited number of
       servers with multi-hundred gigabyte storage arrays.

                                       38
<PAGE>   41

     - Storage Hub -- a networking device that addresses entry level, or
       workgroup, performance requirements. Storage hubs link servers with
       storage devices in an arbitrated loop configuration in which all devices
       on the network share available bandwidth. Some hubs offer basic device
       level management but do not offer fabric or centralized SAN management.
       Typical workgroup configurations use a hub to connect one to four servers
       with one or two storage array devices.

     The following diagram depicts a configuration of servers and storage
devices using the three types of networking devices in a SAN that are referenced
above.

                        EDGAR DESCRIPTION, SEE FOLLOWING
[The diagram depicts a SAN configuration showing a storage director linked to
enterprise UNIX servers, enterprise disk storage devices, a tape library and to
storage switches. In addition, the diagram depicts storage switches linked to
departmental UNIX servers, departmental disk storage devices, a LAN, NT servers
and a storage hub which, in turn, is linked to a tape library.]

     Although still in its early stages of development, the SAN market is
expected to grow rapidly. According to Dataquest, an independent industry
research company, more than 70% of newly installed shared storage in networked
environments is projected to be SANs by the year 2002. IDC forecasts that
worldwide SAN storage systems market revenue will grow from an estimated $3.4
billion in 1999 to over $13.8 billion in 2003, representing a compound annual
growth rate of approximately 42%. This includes SAN systems shipped both with
and without mainframe servers.

     Many fibre channel SAN solutions being installed today are deployed on a
distributed and localized basis across an end-user's enterprise. Consequently,
isolated "islands" of information are created throughout the enterprise, each of
which must be administered and managed locally. As a result of this localized
approach, enterprises have experienced difficulty in protecting and sharing
information on an enterprise-wide basis, preventing them from realizing the full
SAN benefits of managing a centralized data network.

     As organizations deploy SANs across the enterprise, they seek to address
the following requirements:

     - Provide the ability to scale.  Enterprises deploy SANs in order to
       provide the ability to scale servers and storage capacity independently,
       connecting hundreds of storage devices or

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       subsystems to multiple servers, allowing users to scale and upgrade the
       capabilities of their information infrastructures for demanding
       enterprise data needs.

     - Ensure interoperability.  Enterprises require SAN infrastructure
       interoperability, which allows them to integrate SAN products into
       existing storage architectures, thereby preserving investments in legacy
       equipment.

     - Offer on-demand access to data.  Enterprises demand SAN products that are
       designed with significant high availability, functionality and features
       that address the demand for information infrastructures with substantial
       fault tolerance and higher availability of data.

     - Promote cost effective use and management of data.  Enterprises require
       SAN products designed to provide centralized monitoring and control of
       storage and networking devices across the enterprise. This enables
       enterprise users to minimize downtime by monitoring, detecting, isolating
       and troubleshooting faults as they occur, thereby lowering the total cost
       of ownership as SAN resources are utilized more efficiently.

     - Optimize performance in an increasingly complex information
       infrastructure.  Enterprises rely on SANs to provide multiple users
       simultaneous access to stored data over independent paths within the SAN.
       This permits access to data by more users than is possible with
       traditional storage architectures. SAN switches need to provide high port
       count and throughput capability. These features enable higher performance
       and more cost effective scaling because more devices can be connected
       than with clustered switches.

     In order to address these requirements, organizations are increasingly
adopting an enterprise-wide strategy to SAN deployment, requiring SAN
infrastructure providers to adopt features and practices that deliver on the
full promise of SANs.

THE McDATA SOLUTION

     We are the leading provider of high availability director class switching
solutions for connecting servers and storage devices. We combine years of proven
enterprise-level experience in advanced switching technologies with a knowledge
of business critical applications, service and support to solve complex business
problems at the core of the enterprise's data infrastructure. Our solutions
include hardware and software products, methodologies and education that enable
businesses to scale their operations globally through a comprehensive,
manageable, flexible data infrastructure that is optimized for rapid application
deployment and responsiveness to customer needs. The completeness of our
end-to-end fabric ready solutions gives us an important first-mover advantage in
offering enterprise-wide SAN products. The advantages of our solutions include
the following:

     - Scalability -- Dynamic Growth.  Our solutions are designed to enable
       users to consolidate, add or reconfigure servers and storage assets
       within a comprehensive enterprise-wide SAN infrastructure. The
       architecture of our products is designed to permit businesses to expand
       their computing and storage resource needs without causing business
       interruption or a decline in overall storage system performance.

     - Connectivity -- Interoperability.  We are at the forefront of providing
       products that interoperate with the majority of popular servers and
       storage devices. Our products are designed to offer customers a high
       level of investment protection in their current infrastructure based on
       our open architecture approach to heterogeneous switching among
       standards-based SAN offerings.

     - Availability -- Information Anywhere, Anytime.  Our SAN solutions are
       based on high availability features and functionality that offer users a
       reliable and a highly available information infrastructure. Our products
       are designed to provide maximum availability by

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using fault-tolerant technology and internally redundant capabilities that
enable customers to run their businesses on a 24 X 7 basis with 99.999%, or
"five-nines," up-time availability.

     - Manageability -- Comprehensive Control for Low Total Cost of
       Ownership.  Our enterprise-wide, fabric management solutions are designed
       to enable customers to manage their entire SAN fabric from a central
       point. For example, our Enterprise Fabric Connectivity Manager Software,
       or EFCM, is designed to minimize downtime by proactively monitoring,
       detecting and isolating fabric conditions that may interrupt the access
       to or availability of data. Our products are easy to install and operate,
       have powerful, built-in diagnostic capabilities designed to enhance
       troubleshooting methods that reduce the time it takes to restore a fabric
       to full operation. Product features simplify the overall administration,
       service and support of the infrastructure, permitting more efficient use
       of personnel and increased data availability.

     - Performance -- High Price to Performance Value.  Our products are
       designed to offer maximum performance throughout a fabric as the increase
       in business applications drives growth in storage and server connections.
       Our redundant product architecture is designed to provide customers with
       high port density to achieve a lower price-per-port than products
       offering lower port counts in clustered configurations.

THE MCDATA STRATEGY

     We are focused on becoming the leading provider of enterprise-wide SAN
switching solutions. The key elements of our strategy are the following:

     - Capitalize on our market leadership.  We intend to capitalize on our
       market leadership in providing director class switching solutions through
       continual enhancement of our existing products and the development of new
       products. We have extensive experience in developing high availability
       switching solutions that are essential to business computing, including
       SAN solutions and other information infrastructures.

     - Leverage technology leadership to provide an enterprise-wide
       solution.  We intend to leverage our data center technology and backbone
       infrastructure experience to expand our common application specific
       integrated circuit, or ASIC, architecture into products that are suitable
       for other segments of the enterprise. To extend the industry leading data
       center technology of our director class switch, we plan to offer a
       complete portfolio of managed switching solutions for the entire
       enterprise. We will leverage our backbone infrastructure experience to
       enable customers to architect, design and deploy large scale, centrally
       managed, enterprise-wide SAN solutions with a high level of
       infrastructure availability, performance and manageability. The key
       attributes of our director class product, our experience in the
       enterprise and our expanded hardware and software products will provide
       customers with a complete line of solutions for their entire enterprise
       SAN infrastructure requirements.

     - Extend leadership in interoperability.  We intend to lead the development
       and establishment of the next generation of standards for the SAN and
       information infrastructure industry. We pioneered and currently chair the
       Open Standards Fabric Initiative (OSFI), which focuses on the development
       and deployment of industry standards to advance interoperability among
       fibre channel switch products. In addition, we have developed and operate
       a state-of-the-art interoperability lab that enables us to develop
       products that we certify as interoperable with a wide variety of SAN and
       other information infrastructures. Our leadership of OSFI and our
       continued investment in our interoperability efforts will enable us to
       define and support standards for new SAN market opportunities.

     - Develop and deploy a fabric management system.  We intend to leverage our
       EFCM installed base to deploy a fabric management system that enables
       multi-device, multi-vendor software-

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based management. We will combine the capabilities of our ASIC technology with
our management software products to achieve high availability through the
fabric. We will invest in our fabric management software tools to continuously
      improve overall fabric performance. Our fabric management software works
      in conjunction with McDATA management software tools and other system and
      storage management platforms to provide a proactive, single system view
      capability that is required to provide the highest availability of data.

     - Expand multi-channel distribution capability across the enterprise.  We
       will continue to develop and expand our direct assist sales model with
       our existing and future OEM, reseller and systems integrator customers.
       With these new relationships, we intend to develop new markets both in
       the United States and abroad. We have recently entered into renewed
       arrangements with EMC and IBM. Our future success depends in part on the
       successful creation of an open market channel through distributors and
       resellers. To this end, we have developed a network of leading
       distributor and reseller partners. We intend to enter into agreements
       with additional distributors and resellers, both in the United States and
       abroad, to increase our geographic coverage and address new vertical
       markets.

     - Increase brand awareness.  We plan to actively build awareness of our
       brand to position ourselves as the leading provider of high performance,
       highly available SAN and information infrastructure products for
       enterprise business applications. We will extend our brand through our
       distribution and OEM partners. We intend to promote our brand through
       increased investment in a range of marketing programs, including
       advertising in industry print publications, trade show participation,
       direct marketing and public relations.

McDATA PRODUCTS

     McDATA designs, develops, manufactures and sells switching devices and
related software that enable enterprise-wide high performance SANs. We are a
technology and market leader for director class SAN switching products. We are
developing a comprehensive suite of SAN switching products that leverage the
core technology advantages of our hardware and software design architecture to
address enterprise connectivity needs.

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<PAGE>   45

     The following table summarizes the key features and functions of our
primary products:

                            [PRIMARY PRODUCTS GRAPH]

* We are conducting final systems verification testing on the ECS-1000 with
  plans to initiate initial beta customer activities in the third quarter of
  2000. We expect the ECS-1000 to be commercially available in the second half
  of 2000.

     ED-5000 Enterprise Fibre Channel Director.  The ED-5000 provides high
performance switching for mass storage clusters and client-server environments.
The ED-5000 is a 32-port fibre channel switch that offers high-performance
connectivity and high availability as well as shared network management protocol
support in high-end open systems, such as those using UNIX, Windows2000 and
Linux. The product is a high-end solution for applications requiring gigabit
performance and 24x7 operation. The ED-5000 provides full redundancy in a
non-blocking, any-to-any, 32-port, configuration within the switch. The major
sub-assemblies of the ED-5000 are "hot-swappable", thereby allowing customers to
replace and service the unit without interrupting the basic operation of the
switch.

     ECS-1000 Fibre Channel Switch.  The ECS-1000 is an entry level fibre
channel switching device that, when combined with the ED-5000 Director, enables
an end-to-end switching solution for the consolidation of workgroup and
department level storage and servers. High availability features include
redundant fans, power supplies and other components. The ECS-1000 switch is
equipped to be managed with our enterprise software products, providing a
centralized, fabric-wide statistical view of the entire storage network.

     Software Products.  Our management software products, branded Enterprise
Fabric Connectivity Manager, or EFCM, which are licensed separately from our
other products, leverage our director class experience to provide open-systems
network management capabilities. The EFCM platform utilizes standards-based and
proprietary technologies to provide user-friendly distributed network management
configuration and control capabilities. Using Java-based and client-server
technologies, we have designed the EFCM management architecture to be operating
system independent.

     FabricReady Solutions.  Our FabricReady solutions are comprised of our
director products and other SAN networking devices and form comprehensive
enterprise storage connectivity solutions. These FabricReady offerings are
preconfigured and qualified with hardware, software and services necessary to
provide interoperable SAN solutions. FabricReady offerings provide customers and

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<PAGE>   46

channel partners with an integrated, application based SAN solution for solving
business critical problems across the enterprise. It offers customers a
predictable and reliable way to deploy SAN solutions into their production
environments while substantially minimizing overall risks and the costs
associated with new technologies. FabricReady services combine our long standing
commitment and investments in interoperability with the capability to provide
complete end-to-end SAN infrastructure solutions based on the integration and
rigorous testing of applications. We currently provide FabricReady solutions for
NT and Sun consolidation and LAN-free back-up applications.

     Protocol routers and host bus adapters, or HBAs, represent significant
enabling technologies that provide an essential part of a total FabricReady
solution. HBAs are required to provide the fibre channel interface on the server
platforms. We offer the majority of popular interfaces from leading vendors such
as Emulex Corporation, Jaycor and QLogic Corporation as part of a qualified
packaged solution to end-user and systems integrator channels.

     The SCSI to fibre channel router devices are another key element in our
FabricReady solutions portfolio. The EB-1200 is sold as part of a bundled
solution to end-user and systems integrator channels. The EB-1200 provides two
16-bit SCSI ports and one 1.062 gigabit fibre channel port connection for
customers requiring fibre channel connectivity to existing SCSI devices.
Additionally, we are working with router companies, including Crossroads
Systems, Inc. and Chaparral Network Storage, Inc. to integrate and qualify third
party software to enable serverless back-up.

     FICON Bridge.  We designed and manufacture the FICON(TM) feature card
within IBM's 9032 Model 5 Director that functions as a bridge between FICON and
ESCON protocols. FICON is designed to provide fibre channel connectivity to
mainframe storage devices. FICON takes advantage of the ANSI fibre channel
standard transport with the introduction of IBM's performance-enhancing S/390
layer. The FICON Bridge card helps provide customers with investment protection
for currently installed ESCON control units, such as disk storage and tape
control units.

TECHNOLOGY

     We have developed ASIC technology that serves as the foundation for the
development of a complete family of SAN products. Our ASICs provide building
blocks at the circuit level for implementing fibre channel switches. These ASICs
combine a number of fibre channel functions in a single chip that substantially
reduces the number of components needed in our fibre channel switches. Our years
of design expertise in fibre channel technology and large scale switching
solutions allows us to deploy high availability SAN fabrics.

     These ASICs are used in our next generation switch products, which are
currently undergoing testing. The implementation of our new switch architecture
is based on a common hardware and software design. The architecture enables
product designs that span the high-end and mid-range storage computing
environments with gigabit performance and 24x7 operation. Our next generation of
fibre channel SAN products provides the highest port density, non-blocking,
single stage switch that enables a fabric to scale beyond 8000 ports. In
addition to the support for full duplex 1.0625 Gbps ports at very low latencies,
the design supports 2.125 Gbps and future 10 Gbps links.

     As with our first generation fibre channel products, the superior
reliability, availability, manageability and serviceability characteristics of
the product are key design elements of our next generation switch products.
These characteristics include the following:

     - system status monitoring;

     - automatic fail-over to redundant components;

     - non-disruptive serviceability;

     - component failure detection and reporting;

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<PAGE>   47

     - user friendly operation;

     - automated call home facilities;

     - network management that supports both in-band and out-of-band systems;
       and

     - management via our EFCM software management products.

     Our software product architecture is based on a McDATA-developed embedded
real-time operating system which provides state-of-the-art characteristics.
Coupled with hardware architecture, the software design delivers fibre channel
services for the entire family of SAN products, using a single, common code
image.

CUSTOMERS

     Our major customers represent significant providers of enterprise storage
systems, including EMC, IBM, Hitachi Data Systems, Amdahl Corporation and
Hewlett-Packard Company. We currently market our products primarily through one
key original equipment manufacturer, EMC, and one key reseller, IBM. In 1999,
EMC accounted for approximately 69% and IBM accounted for approximately 11% of
our total revenue, respectively.

     As of March 31, 2000, we had core product placements with over 400 end
users purchasing directly from us and our OEM and reseller customers in the
United States and internationally. The following is a list of end users based on
billings in excess of $70,000 in fiscal 1999:

International Business Machines   Corporation
EMC Corporation
Hewlett-Packard Company
Comparex Informationsystems GmbH
Comdisco, Inc.
Amdahl Corporation
Williams Communications Group, Inc.
Corporate Express, Inc.
People's Bank
Netmarks Inc.
Northpoint Communications Group, Inc.
Brocade Communications Systems, Inc.
Citibank (South Dakota), N.A.
Futurelink Distributors
21st Century Insurance Group
Pfizer Inc.
Computer Sales International, Inc.
GE Capital Information Technology
  Solutions, Inc.
Edward Jones

     Our investment in building a world-class sales organization has been a
critical component of growing our installed base of products and end user
deployment in a direct-assist sales model with our OEM and systems integrator
partners. Our close contact with our OEM and systems integrator partners
provides us with direct feedback on our products and solutions and helps
accelerate our sales cycle.

     Our success with our partners and with the market for our products is based
on our solution offerings, including professional, education and FabricReady
solutions. Over the past 18 months, we have enabled our partners to accelerate
the time to deploy their SAN solutions by leveraging our expertise with hundreds
of installations and by training over 1300 people with our education.

     Our goal is to enhance our current OEM partnerships, increase the
proportion of our revenue from additional OEM and reseller relationships and to
attract additional customers. We anticipate, however, that a significant
percentage of our future revenue may continue to be derived from a limited
number of OEM and reseller customers.

     In addition to our OEM and reseller customers, we also have relationships
with systems integrators, including Berkshire Computer Products, Netmarks, Inc.,
Ciber, Inc., Arraid, Inc., HPS Ltd., the Salem Computer Group and Vion
Corporation. These and our other systems integrator

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partners will continue to be a strategic focus for us as we continue to expand
our business and deploy our FabricReady solutions.

SALES AND MARKETING

     Our sales and marketing approach is focused on an indirect sales model
executed through OEMs, resellers and systems integrator partners. These
distribution partners are supported in a direct assist model by our field sales
and service personnel. In addition, our professional and educational services
teams are recognized within the industry as technical experts with proven
deployment methodologies and a comprehensive fibre channel education curricula.

     Our OEM and reseller customers incorporate our switches into their end-user
products that are installed and field-serviced by the OEM's technical support
organizations. IBM Global Services provides our first level of field support for
all products that are sold directly or through our indirect channel partners.
The sales cycle used in selling to an OEM customer can vary significantly in
terms of its length and complexity. Often, it involves the use of our testing
labs or those of our strategic partners, where substantial testing takes place.
It also often involves the submission of proposal documentation and
presentations to the customer. This sales process generally involves the
combined efforts of our sales and marketing, engineering and management teams
and can take from several weeks to more than one year.

     We also intend to continue to sell our products to a limited number of
systems integrators who combine our products with products of other vendors to
provide complete SAN solutions. Systems integrators typically provide
installation, service and technical support to their end-user customers.

     As of March 31, 2000, our sales organization consisted of nine sales
regions, including six in North America and one in each of Germany, the United
Kingdom and Japan. Our sales organization consisted of 73 people, including
field sales personnel, systems engineers, channel sales professionals,
professional and educational services providers and sales operations
professionals.

CUSTOMER SERVICE AND SUPPORT

     We believe that superior customer service and support are critical to
maintain successful long-term relationships with our customers and enhance our
leadership position in the SAN market. This service and support will also
contribute to building our brand, as our products are introduced and integrated
with products of other manufacturers and resellers.

     We provide technical support to our OEM customers and systems integrators,
enabling them to provide technical support to their end users. We do this by
providing training and documentation together with 24x7 support. When a customer
issue originates from our call center, we remain in contact with the customer
until the issue is resolved. Our customer support includes a comprehensive array
of full-service support elements, including:

     - 24x7 call home monitoring;

     - spare parts depots;

     - direct support through IBM Global Services; and

     - field engineers, manufacturer-based technical support specialists and
       regional support specialists available to handle on-site requirements.

MANUFACTURING

     Our manufacturing facility, located in Louisville, Colorado, is
approximately 91,000 square feet. We perform final assembly and testing,
finished goods distribution, customer service repair and

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logistics in this facility. We currently anticipate that this facility will be
adequate for us to meet demand for our products for the foreseeable future. In
addition, we have available additional manufacturing floor space, multiple
shifts and outsourcing options to provide significantly higher volume
manufacturing capability if required.

     We subcontract a majority of our production activities, including the
manufacture, assembly and testing of a substantial part of our products. We
currently utilize SCI Systems as the primary contract manufacturer for printed
circuit board assembly and testing and box build. SCI has multiple sites in
multiple countries that can be used for disaster recovery or to significantly
expand their manufacturing capacity. We currently depend upon LSI Logic for the
production of our ASICs.

     We depend on SCI, LSI Logic and our other subcontractors to deliver
high-quality products in a timely manner, but we cannot assure you that they
will be able to do so. We currently do not have a long-term supply contract with
any of our subcontractors.

     We control all external test processes. We utilize comprehensive
qualification and test methodologies. Our product qualification includes the
performance of Highly Accelerated Life Testing (HALT), which seeks to extend
product performance and operation margins, reduce field issues due to component
drift, tolerance stack-up or changing environments over time. We utilize Highly
Accelerated Stress Screening (HASS) as part of our manufacturing test process.
HASS seeks to remove manufacturing and component defects from our products prior
to shipping.

RESEARCH AND DEVELOPMENT

     The SAN and other information infrastructure markets are characterized by
rapid technological change, including changes in customer requirements, frequent
new product introductions and enhancements, and evolving industry standards. We
believe that continued research and development efforts are an important factor
in our ability to maintain technological competitiveness. As of March 31, 2000,
we employed 164 individuals in engineering and development efforts that are
focused on the development, enhancement and testing of switches, ASICs and the
associated software offerings that address the needs of the SAN market. We
intend to dedicate resources to the continued development of the fibre channel
standards and to achieve interoperability with the fibre channel devices of
other companies. Finally, our Systems Integration Lab is the industry's foremost
fibre channel switched fabric interoperability lab and is staffed by fibre
channel and open systems experts.

     Our research and development expenditures were approximately $17 million in
1997, approximately $18 million in 1998 and approximately $24 million in 1999.
Expenses associated with our Systems Integration Lab are incorporated in our
marketing expenditures and are not included in our research and development
costs.

COMPETITION

     Although the competitive environment in the SAN market has not yet
developed fully, we anticipate that the current and potential market for our
products will be highly competitive, continually evolving and subject to rapid
technological change. New SAN products are being introduced by various server
and storage providers and existing products will be continually enhanced. Our
primary competitor in the fibre channel switch market is Brocade Communications
Inc. Other companies are also providing fibre channel switches and other
products to the SAN market, including Ancor Communications, Inc., Gadzoox
Networks, Inc. and Vixel Corporation. In addition, a number of companies,
including Emulex Corporation, Interphase Corporation, JNI Corporation, QLogic
Corporation and Crossroads Systems, Inc. are developing, or have developed,
fibre channel products other than switches, including adapters and hubs. We
anticipate that these and other manufacturers of network equipment may introduce
new fibre channel switch products in the near future. In the

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future, we may also compete with networking companies or other companies in
related or other industries for which future direct participation in the market
for switching devices may become strategic. In addition, although EMC has agreed
for a period of two years after the completion of this offering not to develop
or manufacture products that compete with our products, upon the expiration of
that two-year period, EMC may directly compete with us. Moreover, we have
granted EMC a license under our patents to make, use and sell any products that
EMC is selling or distributing up to the date of the offering, including
products that compete with ours.

     It is also possible that our existing or potential customers could develop
and introduce products competitive with our product offerings. We believe the
competitive factors in this market segment include:

     - product performance and features;

     - product reliability and interoperability;

     - price;

     - ability to meet delivery schedules;

     - customer service and technical support; and

     - systems management.

     Some of our current and potential competitors have established operating
histories, greater resources and name recognition, and a larger installed base
of customers than we have. As a result, these competitors may have greater
credibility with our existing and potential customers. They also may be able to
adopt more aggressive pricing policies and devote greater resources to the
development, promotion and sale of their products than we can to ours. This may
allow them to respond more quickly than we can to new or emerging technologies
and changes in customer requirements. In addition, some of our current and
potential customers have already established supplier or joint development
relationships to discourage these customers from purchasing additional products
from us or persuade them to replace our products with their products. Increased
competition could result in pricing pressures, reduced sales, reduced margins,
reduced profits, reduced market share or the failure of our products to achieve
or maintain market acceptance. We may not have the financial resources,
technical expertise or marketing, manufacturing, distribution and support
capabilities to compete successfully in the future. Additionally, we may not be
able to compete successfully against current or future competitors and
competitive pressures may materially harm our business.

INTELLECTUAL PROPERTY

     Our success depends on our ability to protect our proprietary technology
and to operate without infringing the proprietary rights of third parties. We
rely on a combination of patents, copyrights, trademarks and trade secrets, as
well as confidentiality agreements and other contractual restrictions with
employees and third parties, to establish and protect our proprietary rights. We
cannot be certain that the steps we take to protect our intellectual property
will adequately protect our proprietary rights, that others will not copy or
otherwise obtain and use our products and technology without authorization,
independently develop or otherwise acquire equivalent or superior technology or
that we can maintain such technology as trade secrets. In addition, the laws of
some of the countries in which our products are or may be sold may not protect
our proprietary rights as fully as the laws of the United States.

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     As of March 31, 2000, we held 18 U.S. patents and had 16 additional U.S.
patents pending. We are seeking additional patent protection for certain
additional aspects of our technology. However, it is possible that patents may
not be issued for these applications.

     It is possible that litigation may be necessary in the future to enforce
our intellectual property rights, to protect our trade secrets or to determine
the validity and scope of the proprietary rights of others. Litigation could
result in substantial costs and diversion of our resources and could materially
harm our business. From time to time, we have received, and may receive in the
future, notice of claims of infringement of other parties' proprietary rights.
Infringement or other claims could be asserted or prosecuted against us in the
future, and it is possible that past or future assertions or prosecutions could
harm our business. Any such claims, with or without merit, could be time-
consuming, result in costly litigation and diversion of technical and management
personnel, cause delays in the development and release of our products, or
require us to develop non-infringing technology or enter into royalty or
licensing arrangements. Such royalty arrangements, if required, may not be
available on terms acceptable to us, or at all. For these reasons, infringement
claims could materially harm our business.

     Pursuant to the Master Confidential Disclosure and License Agreement
between EMC and us, EMC has granted us a license under existing EMC patents. If
we are acquired, our acquiror will retain this license as long as our acquiror
grants to EMC a license under all of the acquiror's patents for all products
licensed under the agreement under the same terms as the license we have granted
to EMC under the agreement. The loss of the license from EMC may make an
acquisition of us by a third party unlikely.

     EMC and IBM entered into a cross license agreement on March 19, 1999, and
amended that agreement on May 12, 2000, under which each party, on behalf of
itself and its subsidiaries, granted the other a license under patents issued or
issuing on applications entitled to an effective filing date through December
31, 2005. Pursuant to this cross license agreement, patents held by us were
licensed to IBM and patents held by IBM were sublicensed to us by EMC. Each
party released the other and its subsidiaries from claims of patent infringement
committed prior to the date of the cross license. In the event of the
distribution of our Class A common stock as currently contemplated by EMC, IBM,
pursuant to the cross license agreement, will retain the benefit of a license to
our patents with an effective filing date through the date of such distribution,
but the sublicense to us under IBM patents will terminate upon such date in
accordance with the terms of the cross license agreement. We are not aware of
any issued or pending IBM patents that are infringed by our products, nor have
we received any notice of alleged infringement from IBM. However, in the event
that IBM were to allege any such infringement following the distribution of our
Class A common stock by EMC, our ability to negotiate a settlement may be
impaired either by the absence of any incentive for IBM to negotiate a
cross-license arrangement or otherwise.

     The cross license agreement further provides that if either party transfers
a product line after the effective date of the cross license agreement, either
as part of or separate from a disposition of a subsidiary to any third party,
and if such transfer includes patents and tangible assets having a net value of
at least $100,000,000, relating to the product line being transferred with the
subsidiary, then after written request by the transferring party and, if
applicable, by such third party, to the other party within 60 days following the
transfer, the other party will grant to the ex-subsidiary, in the case of a
disposition of a subsidiary, a royalty free license under its licensed patents,
subject to the following limitations: (1) the field would be limited to only the
particular product line being transferred, including subsequent versions under
development by the Transferring Party at the time of the disposition, (2) the
license would only cover, in any twelve month period, a volume of licensed
products generating revenue equal to 110% of product revenue for the preceding
twelve month period, (3) the ex-subsidiary would be required to grant IBM a
royalty-free cross license under its patents

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and (4) the license to the ex-subsidiary would terminate should the license from
IBM to EMC terminate. Although we believe that the foregoing provision would
apply to us following the distribution of our Class A common stock by EMC, there
can be no assurance that IBM will agree with our interpretation. In addition,
even if IBM accepts our interpretation, the cross-license agreement does not
specify the consequences if a transferred subsidiary exceeds the limit of 10%
annual increases in product revenue.

EMPLOYEES

     At March 31, 2000, we had 419 full-time employees. Of these employees, 164
were engaged in engineering and development, 118 in sales, marketing and
customer support, 77 in manufacturing and 60 in finance and administration. None
of our employees are represented by a labor union. We have not experienced any
work stoppages and consider our relations with our employees to be good.

     Our future performance depends in significant part upon the continued
service of our key technical, sales and senior management personnel, several of
whom are not bound by an employment agreement requiring service for any defined
period of time. The loss of the services of one or more of our key employees
could have a material adverse effect on our business, financial condition and
results of operations. Our future success also depends on our continuing ability
to attract, train and retain highly qualified technical, sales and managerial
personnel. We face rigorous competition for such personnel in the greater
metropolitan Denver and metropolitan Toronto areas, where our main facilities
are located. We may not be able to retain our key personnel in the future.

LITIGATION

     From time to time, we may become involved in various lawsuits and legal
proceedings that arise in the ordinary course of business. Litigation is subject
to inherent uncertainties and an adverse result in a matter that may arise from
time to time may harm our business, financial condition or results of operation.

FACILITIES

     Our principal facilities for administration, sales, marketing, customer
support, manufacturing, research and development are located in two facilities
in the greater Broomfield, Colorado area. We currently occupy 122,000 square
feet of office space under a lease that expires in December 2003 and
approximately 91,000 square feet of manufacturing space under a lease that
expires in February 2003. We also occupy 10,400 square feet of office space in
Toronto, Ontario under a lease that expires in June 2003. We believe our current
facilities will be adequate to meet our needs for the next twelve months. If our
growth continues, we will need larger facilities at that time. There can be no
assurance that suitable additional facilities will be available as needed on
commercially reasonable terms. We have signed a letter of intent to acquire
approximately 90 acres of land in Broomfield, Colorado for a cost of
approximately $12.0 million.

                                       50
<PAGE>   53

                                   MANAGEMENT

EXECUTIVE OFFICERS AND DIRECTORS

     The following table sets forth certain information regarding our executive
officers and directors as of the date of this prospectus:

<TABLE>
<CAPTION>
NAME                                        AGE                        POSITION
----                                        ---                        --------
<S>                                         <C>   <C>
John F. McDonnell.........................  55    Chairman of the Board of Directors, Chief Executive
                                                    Officer and President
Richard A. Carlson........................  47    Vice President of Quality and Customer Support
Michael B. Gustafson......................  33    Vice President of Worldwide Sales and Services
James E. Kuenzel..........................  46    Vice President of Engineering
Dee J. Perry..............................  48    Chief Financial Officer and Vice President of
                                                  Finance and Administration
Jeffery O. Vogel..........................  44    Vice President of Marketing and Systems Integration
                                                    Services
David M. Weishaar.........................  48    Vice President of Manufacturing and Customer
                                                  Service
David A. Donatelli........................  35    Director
John W. Gerdelman.........................  47    Director
Charles C. Johnston.......................  65    Director
D. Van Skilling...........................  66    Director
Thomas M. Uhlman..........................  53    Director
Laurence G. Walker........................  51    Director
</TABLE>

EXECUTIVE OFFICERS AND DIRECTORS

     John F. McDonnell is a founder of McDATA and has served as Chief Executive
Officer and President of McDATA since its inception in 1982, and has served as
Chairman of the Board of Directors since 1998. Mr. McDonnell has more than 31
years of experience in the data communications field, including 26 years in
corporate and technical management and 5 years in engineering. Prior to founding
McDATA, he held various corporate management and engineering positions at
Storage Technology Corporation and Computer Communications, Inc. Mr. McDonnell
attended California State University at Long Beach.

     Richard A. Carlson has been Vice President of Corporate Quality and
Customer Support since May 1995. Mr. Carlson joined McDATA as a support
technician in 1986 and served in a variety of support and management positions
until 1995, most recently as Director of Customer Support from October 1992 to
May 1995. Mr. Carlson received his associate degree in management from Front
Range Community College in Colorado.

     Michael B. Gustafson has been Vice President of Worldwide Sales and
Services since March 1999. From May 1998, when he joined McDATA, until March
1999, Mr. Gustafson served as a regional sales manager of McDATA. Prior to
joining McDATA, Mr. Gustafson spent 9 years with IBM serving in various sales
management positions, including most recently as Business Unit Executive and
Director of U.S. Channel Field Sales of IBM from June 1997 until May 1998. Mr.
Gustafson received his Bachelor of Science degree in business administration
from Washington University in St. Louis.

     James E. Kuenzel has been Vice President of Engineering since joining
McDATA in November 1999. He was previously Vice President of Engineering at
Cabletron Systems Inc. from February 1998 until October 1999 and held a variety
of engineering management positions at Digital Equipment Corporation over a
period of twenty years, including having served as the Vice President

                                       51
<PAGE>   54

of Engineering from January 1997 until February 1998 and as a Director of
Engineering from March 1994 until January 1997. Mr. Kuenzel received his
associate degree in electronics from the Philco Ford Technical Institute.

     Dee J. Perry has been the Chief Financial Officer and Vice President of
Finance and Administration since May 2000. Ms. Perry also served in this
capacity from January 1991 until April 2000. Ms. Perry was previously Controller
at Celestial Seasonings from April 1989 to September 1990 and Controller at NBI,
Inc. from April 1985 to March 1989. Ms. Perry received her Bachelor of Arts and
Master of Science degrees in accounting from the University of Colorado and her
Master of Business Administration degree from Arizona State University.

     Jeffery O. Vogel has been the Vice President of Marketing and System
Integration Services since joining McDATA in December 1998. He served as Vice
President of Marketing and Business Development at Vixel Corporation from
November 1993 until November 1998. Previously, he held sales, marketing and IT
management positions at Hitachi Data Systems, Seagate Technology, Inc., Western
Digital Corporation and Bank of America. Mr. Vogel received his Bachelor of
Science degree in engineering from the DeVry Institute.

     David M. Weishaar has been the Vice President of Manufacturing since
joining McDATA in July 1999. From November 1994 to December 1998 Mr. Weishaar
served as Vice President of Manufacturing and Customer Service, and Chief
Quality Officer for Stratus Computer and from June 1993 to November 1994 he
served as the Vice President of Manufacturing at Stratus Computer. He has also
held executive management positions at Sun Microsystems, Sequoia Systems, and
ZTEL, Inc, and management positions at Digital Equipment Corporation. He
received his Bachelor of Science degree in Electrical Engineering from the
University of Wyoming and his Master of Business Administration degree from
Northeastern University.

     David A. Donatelli, Senior Vice President, New Business Development, EMC
Corporation, has served as a director of McDATA since May 1999. Mr. Donatelli
has been employed by EMC for 12 years, serving in a number of senior management
positions, most recently as Vice President and General Manager, EMC Data Manager
group from February 1998 to March 1999 and Senior Vice President, New Business
Development of EMC from April 1999 to present. He is a graduate of Boston
College and received his Master of Business Administration degree from
Northwestern University's Kellogg School of Management.

     John W. Gerdelman, Managing Member, Mortonsgroup LLC, has served as a
director of McDATA since May 1998. Mr. Gerdelman has been Managing Member of
Mortonsgroup LLC, an early stage venture firm, since October 1999. From April
1999 to October 1999, Mr. Gerdelman was Chief Executive Officer of USA.NET. Mr.
Gerdelman was employed by MCI Telecommunications Corporation as an Executive
Vice President from 1986 through 1999. He received his Bachelor of Science
degree in chemistry from the College of William and Mary. Mr. Gerdelman is also
a director of Sycamore Networks, Inc.

     Charles C. Johnston, Chairman, Ventex Technology, Inc., AFD Technologies
and J & C Resources, has served as a director of McDATA since May 1998. Mr.
Johnston was founder, Chairman and CEO of ISI Systems from 1990 to 1992 before
it was sold to Teleglobe Corporation of Montreal, Canada. He served in various
capacities at IBM Corporation from 1959 until 1965 and served as Director of
Grumman Corporation and Teleglobe Corporation from 1989 to 1994. He received his
Bachelor of Science degree in 1957 from the Worcester Polytechnic Institute. He
currently serves as a director of Bitwise Designs, Inc., Hydron Technologies,
Inc., Internet Commerce Corporation and Waste Systems International, Inc.

     D. Van Skilling, President, Skilling Enterprises, Chairman Emeritus,
Experian, has served as a director of McDATA since May 1998. Mr. Skilling
retired as Chairman and Chief Executive Officer

                                       52
<PAGE>   55

of Experian Information Solutions, Inc., formerly TRW Information Systems &
Services, in April 1999. From September 1996 until April 1999, Mr. Skilling was
Chairman and Chief Executive Officer of Experian. From March 1970 until
September 1996, Mr. Skilling was the Executive Vice President of TRW Information
Systems and Services. He received his Bachelor of Science degree in chemistry
from Colorado College and his Master of Business Administration degree in
International Business from Pepperdine University. He currently serves on the
Boards of Directors of The Lamson & Sessions Company and First American
Financial Corporation.

     Thomas M. Uhlman, President, New Ventures Group, Lucent Technologies, Inc.,
has served as a director of McDATA since May 1998. Mr. Uhlman has been
President, New Ventures Group of Lucent Technologies since 1997. From 1996 to
1997, Mr. Uhlman was Senior Vice President, Corporate Strategy, Business
Development and Public Affairs of Lucent Technologies. From 1995 to 1996 Mr.
Uhlman was the Vice President, Corporate Development of AT&T Corp. Prior to
joining AT&T, he was with Hewlett-Packard Company in various advisory and
management roles. He received his Ph.D. in Political Science from the University
of North Carolina, his Masters Degree in management from Stanford University and
his Bachelor of Arts degree in political science and psychology from the
University of Rochester.

     Laurence G. Walker, Chief Executive Officer, C-Port Corporation, which
recently became a wholly-owned subsidiary of Motorola, has served as a director
of McDATA since May 1998. Prior to co-founding C-Port in 1997, Mr. Walker served
as Chief Executive Officer of CertCo, a digital certification supplier. Prior to
that, he was Vice President and General Manager, Network Product Business Unit,
Digital Equipment Corporation from January 1994 to July 1996. From 1981 to 1994,
he held a variety of other management positions at Digital Equipment
Corporation. He received his Ph.D. and Master of Science degree in electrical
engineering from the Massachusetts Institute of Technology and his BSEE from
Princeton.

     We are presently engaged in a search for a replacement for our Chief
Financial Officer. In May 2000, a candidate we had retained for this position
determined that he would be unable to serve in that capacity for personal
reasons. Ms. Perry has agreed to serve in her current position until a
replacement candidate has been hired and to assist in any transition process.

     All of our directors hold office until the first annual meeting of
stockholders following this offering and until their successors are duly elected
and qualified or their earlier resignation, retirement, disqualification or
removal from office. After election at the annual meeting following this
offering, the directors will then serve for three year terms expiring at each
successive annual meeting of the stockholders and until they or their successors
are duly elected and qualified.

     Our officers serve at the discretion of the board of directors. There are
no family relationships among our directors and officers.

BOARD OF DIRECTORS COMMITTEES AND OTHER INFORMATION

     Our board of directors has an audit committee and a compensation committee.
The audit committee, currently comprised of Messrs. Gerdelman, Johnston and
Skilling, determines our accounting policies and practices and financial
reporting and internal control structures, recommends to our board of directors
the appointment of independent auditors to audit our financial statements each
year and confers with the auditors and our officers for purposes of reviewing
our internal controls, accounting practices, financial structures and financial
reporting. The compensation committee, currently comprised of Messrs. Donatelli,
Uhlman and Walker determines salaries, incentives and other forms of
compensation for our executive officers and administers our incentive
compensation plan.

                                       53
<PAGE>   56

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     No interlocking relationship exists between our board of directors or
compensation committee and the board of directors or compensation committee of
any other entity, nor has any interlocking relationship existed in the past.

DIRECTOR COMPENSATION

     With the exception of John F. McDonnell and David A. Donatelli, all of our
directors are compensated for their services as board or committee members. Each
director other than Mr. McDonnell and Mr. Donatelli currently receives an annual
director's fee of $10,000, plus $1,000 for each board meeting and $1,000 for
each committee meeting. Our practice has been to grant directors options to
purchase 25,000 shares of our Class B common stock when they became directors
and to grant them options to purchase an additional 10,000 shares of our Class B
common stock each year thereafter. In October 1997, before he became a director,
Mr. McDonnell was granted an option to purchase 500,000 shares of our Class B
common stock and has not been granted options since. Mr. Donatelli has not been
granted any options to purchase our common stock.

LIMITATION OF LIABILITY AND INDEMNIFICATION

     Pursuant to the Delaware General Corporation Law, we have adopted
provisions in our amended and restated certificate of incorporation and amended
and restated by-laws that limit or eliminate the personal liability of our
directors for a breach of their fiduciary duty of care as a director. The duty
of care generally requires that, when acting on behalf of the corporation,
directors exercise an informed business judgment based on all material
information reasonably available to them. Consequently, a director will not be
personally liable to us or our stockholders for monetary damages or breach of
fiduciary duty as a director, except for liability for:

     - any breach of the director's duty of loyalty to us or our stockholders;

     - acts or omissions not in good faith or that involve intentional
       misconduct or a knowing violation of law;

     - unlawful payments of dividends or unlawful stock purchases, redemptions
       or other distributions; or

     - any transaction from which the director derived an improper personal
       benefit.

     Our amended and restated certificate of incorporation also allows us to
indemnify our officers, directors and other agents to the full extent permitted
by Delaware law.

     The limited liability and indemnification provisions in our amended and
restated certificate of incorporation and amended and restated by-laws may
discourage stockholders from bringing a lawsuit against our directors for breach
of their fiduciary duty and may reduce the likelihood of derivative litigation
against our directors and officers, even though a derivative action, if
successful, might otherwise benefit us and our stockholders. Moreover, a
stockholder's investment in McDATA may be adversely affected to the extent we
pay the costs of settlement or damage awards against our directors and officers
under these indemnification provisions.

     At present, there is no pending litigation or proceeding involving any of
our directors, officers, or employees in which indemnification is sought, nor
are we aware of any threatened litigation that may result in claims for
indemnification.

                                       54
<PAGE>   57

EXECUTIVE COMPENSATION

     The following table sets forth information for the fiscal year ended
December 31, 1999 concerning the compensation paid to our Chief Executive
Officer and our four other most highly compensated executive officers and one
former executive officer whose total salary and bonus for such fiscal year
exceeded $100,000, collectively referred to below as the Named Executive
Officers:

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                         LONG-TERM
                                                                        COMPENSATION
                                                                           AWARDS
                                                                        ------------
                                                 ANNUAL COMPENSATION     SECURITIES       OTHER
                                                 --------------------    UNDERLYING    COMPENSATION
NAME AND PRINCIPAL POSITION                      SALARY($)   BONUS($)    OPTIONS(#)        ($)
---------------------------                      ---------   --------   ------------   ------------
<S>                                              <C>         <C>        <C>            <C>
John F. McDonnell..............................  $268,008    $ 35,131          --        $ 9,525(1)
  Chief Executive Officer and President
Michael A. Klayko(2)...........................   200,000      91,047      60,000         22,968(3)
  Executive Vice President of Sales and
  Marketing
Dee J. Perry...................................   139,466      14,785          --          4,503(4)
  Chief Financial Officer and Vice President of
  Finance and Administration
Paul F. Lilly(5)...............................   124,645       9,802          --          4,481(6)
  Vice President of Engineering
Michael B. Gustafson...........................    99,230     112,916     120,000         45,547(7)
  Vice President of Worldwide Sales and
  Services
Jeffery O. Vogel...............................    98,846      78,750     200,000         69,871(8)
  Vice President of Marketing and Systems
  Integration Services
</TABLE>

-------------------------
(1) Includes $1,806 for term life insurance premiums, $2,000 paid to Mr.
    McDonnell's account in our 401(k) plan and $5,719 for reimbursement of
    travel expenses.

(2) Mr. Klayko became Senior Vice President of Business Development in January
    2000 and ceased to be an executive officer on April 25, 2000.

(3) Includes $6,630 for term life insurance premiums, $3,000 paid to Mr.
    Klayko's account in our 401(k) plan, $1,906 for reimbursement of travel
    expenses and $11,432 for financial planning advice.

(4) Includes $412 for term life insurance premiums and $4,091 paid to Ms.
    Perry's account in our 401(k) plan.

(5) Mr. Lilly resigned as Vice President of Engineering effective November 4,
    1999.

(6) Includes $448 for term life insurance premiums and $4,033 paid to Mr.
    Lilly's account in our 401(k) plan.

(7) Includes $96 for term life insurance premiums for Mr. Gustafson, $4,765 paid
    to Mr. Gustafson's account in our 401(k) plan and $40,686 for reimbursement
    of relocation expenses.

(8) Includes $180 for term life insurance premiums and $69,691 for reimbursement
    of relocation expenses.

OPTIONS GRANTS IN LAST FISCAL YEAR

     The following table sets forth certain information for each grant of stock
options during the year ended December 31, 1999 to each of the Named Executive
Officers. All of these options granted by

                                       55
<PAGE>   58

us were granted under our 1997 Stock Option Plan and have a term of 10 years,
subject to earlier termination in the event an optionee's services to us cease.
For more information, see "Employee Benefit Plans" for descriptions of the
material terms of these options. During the year ended December 31, 1999, we
granted options to purchase an aggregate of 3,646,700 shares of Class B common
stock under the 1997 Stock Option Plan. Options were granted at an exercise
price equal to the fair market value of our Class B common stock on the date of
grant, as determined in good faith by our board of directors. Our board of
directors determined the fair market value based on our financial results and
prospects and evaluations conducted by valuation experts and by management.
Potential realizable values are net of exercise prices before taxes, and are
based on the assumption that our Class B common stock appreciates at the annual
rate shown, compounded annually, from the date of grant until the expiration of
the ten-year term and that the option is exercised at the exercise price and
sold on the last day of its term at the appreciated price. These numbers are
calculated based on Securities and Exchange Commission requirements and do not
reflect any projection or estimate of future stock price growth. No stock
appreciation rights were granted during the fiscal year ended December 31, 1999.

<TABLE>
<CAPTION>
                                             INDIVIDUAL GRANTS                        POTENTIAL
                            ---------------------------------------------------       REALIZABLE
                                          PERCENT OF                               VALUE AT ASSUMED
                              NUMBER        TOTAL                                  ANNUAL RATES OF
                                OF         OPTIONS                                   STOCK PRICE
                            SECURITIES    GRANTED TO    EXERCISE                   APPRECIATION FOR
                            UNDERLYING    EMPLOYEES     PRICE PER                    OPTION TERM
                             OPTIONS          IN          SHARE      EXPIRATION    ----------------
NAME                         GRANTED         1999       ($/SHARE)       DATE         5%       10%
----                        ----------    ----------    ---------    ----------    ------    ------
<S>                         <C>           <C>           <C>          <C>           <C>       <C>
John F. McDonnell.........        --           --            --            --          --        --
Michael A. Klayko.........    60,000         1.65%        $2.00       4/27/09
Dee J. Perry..............        --           --            --            --          --        --
Paul F. Lilly.............        --           --            --            --          --        --
Michael B. Gustafson......   120,000         3.29          1.62        2/1/09
Jeffery O. Vogel..........   200,000         5.50          1.62        2/2/09
</TABLE>

AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR

     The following table sets forth information with respect to the Named
Executive Officers concerning exercisable and unexercisable options held as of
December 31, 1999. The dollar value of in-the-money options at December 31, 1999
is calculated by determining the difference between the fair market value of
$10.65 per share and the option exercise price.

<TABLE>
<CAPTION>
                                                        NUMBER OF SECURITIES                VALUE OF
                                                             UNDERLYING                    UNEXERCISED
                                                             UNEXERCISED                  IN-THE-MONEY
                                                             OPTIONS AT                    OPTIONS AT
                           SHARES                         DECEMBER 31, 1999             DECEMBER 31, 1999
                         ACQUIRED ON      VALUE      ---------------------------   ---------------------------
NAME                     EXERCISE(#)   REALIZED($)   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
----                     -----------   -----------   -----------   -------------   -----------   -------------
<S>                      <C>           <C>           <C>           <C>             <C>           <C>
John F. McDonnell......     60,000     $  579,000      440,000        500,000      $4,246,000     $4,825,000
Michael A. Klayko......    250,000      2,412,500           --        560,000              --      5,344,000
Dee J. Perry...........    300,000      2,895,000      100,000        400,000         965,000      3,860,000
Paul F. Lilly..........    400,000      3,860,000           --        400,000              --      3,860,000
Michael B. Gustafson...         --             --       20,000        380,000         190,600      1,655,400
Jeffery O. Vogel.......         --             --           --        200,000              --      1,806,000
</TABLE>

                                       56
<PAGE>   59

MANAGEMENT BONUS PROGRAM

     All of our executive officers and many of our other senior employees are
eligible for a bonus based upon achievement of specified annual or quarterly
objectives. There is no formal agreement with respect to this program and
objectives for bonuses are set annually by the board of directors. Currently the
bonus is calculated as a percentage of base compensation and can range from 10%
to 35% for non-executive officers and from 25% to 50% for executive officers.
For non-executive officers, the bonus is tied to achievement of quarterly
objectives agreed to by the employee and their manager. For executive officers,
the bonus is tied to achievement of annual planned operating profit or revenue
and achievement of quarterly objectives. Typically, 70% of an executive
officer's bonus is tied to achievement of annual planned profit and 30% to
achievement of quarterly objectives. To date, no executive officer has received
any portion of a bonus tied to operating profitability.

EMPLOYMENT AGREEMENTS

     All of our executive officers have entered into severance agreements and
key employee agreements with us. Our severance agreements grant our executive
officers a payment, in a lump sum or according to our normal payroll timetable,
equal to four times the average of their quarterly compensation over the
preceding eight calendar quarters, payment for all accrued but unused vacation
days, the provision of health benefits for a period of time and automatic
acceleration of the vesting of all stock options held if we terminate their
employment upon a change in control and provide that our executive officers will
not engage in any activity that conflicts with their obligations to us, induce
other employees to leave us, or compete with us for a period of one year after
termination of their employment. Pursuant to the key employee agreement, all
confidential, proprietary or other trade secret information and all other
discoveries, inventions, processes, methods and improvements made by the
employee are our property. In addition, pursuant to the agreement, employees may
not compete with us for one year after termination of their employment.

EMPLOYEE BENEFIT PLANS

  1997 Stock Option Plan

     Our board of directors and our stockholders approved and adopted our 1997
Stock Option Plan in October 1997. As of March 31, 2000, approximately 3.9
million shares of our Class B common stock were reserved for issuance under the
1997 Stock Option Plan. Under the terms of the 1997 Stock Option Plan, our board
of directors may grant incentive stock options and non-qualified stock options
to our employees and non-qualified stock options to our directors, provided that
certain eligibility requirements are satisfied. Our board of directors
administers the 1997 Stock Option Plan, but has the authority to delegate the
administration of the plan to a committee that may include non-employee
directors and outside directors, within the meaning of the Plan.

     Subject to the provisions of the 1997 Stock Option Plan, our board of
directors or committee has the authority to select eligible persons to whom
options will be granted and determine the terms of each option, including:

     - the duration of the option, which may not exceed 10 years;

     - whether an option will be an incentive stock option or a non-qualified
       stock option;

     - the number of shares of Class B common stock covered by the option; and

     - when the option becomes exercisable.

                                       57
<PAGE>   60

     The exercise price per share of Class B common stock for:

     - non-qualified options must be no less than 85% of the fair market value
       per share of the Class B common stock subject to the option on the date
       of grant;

     - incentive stock options must be no less than the fair market value of the
       Class B common stock subject to the option on the date of the grant; and

     - incentive stock options granted to an employee owning more than 10% of
       the total combined voting power of all classes of our capital stock, or
       of any related company, must not be less than 110% of the fair market
       value per share of the Class B common stock on the date of the grant.

     Initially, each incentive stock option granted is exercisable over a period
determined by the board of directors in its discretion, not to exceed ten years
from the date of the grant as required by the Internal Revenue Code of 1986. In
addition, the exercise period for an incentive stock option may not exceed five
years from the date of the grant if the option is granted to an individual who,
at the time of the grant, owns more than 10% of the total combined voting power
of all classes of our capital stock. The board of directors generally has the
right to accelerate the exercisability of any options granted under the 1997
Stock Option Plan that would otherwise be unexercisable. In the event of certain
changes in control, the acquiring or successor corporation may assume or grant
substitute options for options then outstanding under the 1997 Stock Option
Plan, or such options shall terminate.

     The 1997 Stock Option Plan expires on September 30, 2007, except as to
options or awards outstanding on that date. Subject to the terms of the 1997
Stock Option Plan, the board of directors may terminate or amend the 1997 Stock
Option Plan at any time.

     As of March 31, 2000, options for the purchase of an aggregate of
12,462,964 shares of Class B common stock at a weighted average exercise price
of $2.51 were outstanding under the 1997 Stock Option Plan.

  401(k) Plan

     Effective January 1, 1999, we adopted a 401(k) Plan. Participants in our
401(k) plan may contribute up to 15% of their total annual compensation, not to
exceed the specified statutory limit, which was $10,000 in calendar year 1999.
The 401(k) plan permits, but does not require, us to make contributions to the
401(k) plan on behalf of our employees. Our current practice is to match $.50 on
each dollar of an employee's contributions up to the first 6% of an employee's
compensation with a total maximum matching contribution of 3% of an employee's
compensation. All contributions to the 401(k) plan by or on behalf of employees
are subject to the aggregate annual limits prescribed by the Internal Revenue
Service. Under our 401(k) plan, our participants received full and immediate
vesting of their contributions and are vested in matching contributions over a
three year period.

                                       58
<PAGE>   61

                  RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

     Since January 1, 1999, there has not been nor is there currently proposed
any transaction or series of similar transactions to which we were or are a
party in which the amount involved exceeds $60,000 and in which any director,
executive officer, holder of more than 5% of our common stock or any member of
the immediate family of any of the foregoing persons had or will have a direct
or indirect material interest other than (1) compensation agreements and other
arrangements, which are described in "Management" and (2) the transactions
described below and in "Arrangements Between McDATA and EMC."

TRANSACTIONS WITH 5% SHAREHOLDERS

     Pursuant to the Services Agreement dated October 1, 1997 by and among EMC,
McDATA Holdings Corporation and us, we provide manufacturing and distribution
management services to McDATA Holdings Corporation for ESCON switching solutions
manufactured for and sold exclusively to IBM in return for a service fee payable
by McDATA Holdings Corporation. The Services Agreement is described more fully
in "Arrangements between McDATA and EMC." This fee amounted to $17,337,000 for
the year ended December 31, 1999, $25,674,000 for the year ended December 31,
1998 and $7,848,000 for the three month period ended December 31, 1997. One of
our directors, David A. Donatelli, is the Senior Vice President, New Business
Development of EMC. McDATA Holdings Corporation is a direct, wholly-owned
subsidiary of EMC.

INDEMNIFICATION OF DIRECTORS AND EXECUTIVE OFFICERS

     Our amended and restated certificate of incorporation and amended and
restated by-laws provide that we will indemnify each of our directors and
officers to the fullest extent permitted by the Delaware General Corporation
Law. For more information, see "Limitation of Liability and Indemnification."

                                       59
<PAGE>   62

                      ARRANGEMENTS BETWEEN McDATA AND EMC

     We have provided below a summary description of our continuing rights and
obligations with respect to certain agreements entered into in connection with
the 1997 restructuring of McDATA by EMC and with respect to certain agreements
entered into with EMC in connection with the offering and the distribution. This
summary is not complete. You should read the full text of these agreements,
which have been filed with the Securities and Exchange Commission as exhibits to
the registration statement of which this prospectus is a part.

                              THE 1997 AGREEMENTS

ASSET TRANSFER AGREEMENT

     Pursuant to the Asset Transfer Agreement dated as of October 1, 1997 by and
among EMC, McDATA Holdings Corporation and us, McDATA Holdings Corporation
agreed, among other things, to transfer to us substantially all of its tangible
and intangible assets, except for certain assets relating to its ESCON business,
including its exclusive manufacturing and marketing contracts with IBM. In
consideration for the transfer, we agreed to issue 81,000,000 shares of Class A
common stock to, and to assume all liabilities (excluding, among other things,
certain tax and accrued liabilities) of, McDATA Holdings Corporation related to
the transferred assets.

INVESTORS' RIGHTS AGREEMENT

     Pursuant to the Investors' Rights Agreement dated as of October 1, 1997 by
and among us, EMC, McDATA Holdings Corporation and John F. McDonnell, as
amended, we agreed to certain protective provisions in favor of McDATA Holdings
Corporation, a wholly-owned subsidiary of EMC and the holder of all of the
outstanding shares of our Class A common stock. In particular, we agreed that in
the event that we issue any of our equity securities, or any other event occurs,
that would result in McDATA Holdings Corporation's percentage interest in the
voting power or value of all of our outstanding capital stock to fall below 50%,
then McDATA Holdings Corporation would have the right to purchase shares of
those equity securities for the price and upon the terms and conditions in the
proposed issuance, in an amount sufficient to enable it to maintain a 50%
interest in the voting power or value of all of our outstanding capital stock.
EMC presently intends to terminate this right at the time of its contemplated
distribution of our Class A common stock to its stockholders.

     In addition, McDATA Holdings Corporation has, in certain circumstances, a
right of first refusal with respect to transfers of Class B common stock held by
John McDonnell. McDATA Holdings Corporation has the right to purchase Mr.
McDonnell's Class B common stock if Mr. McDonnell is no longer employed by us
and wishes to sell his Class B common stock in a private sale. In such instance,
McDATA Holdings Corporation has the right to purchase Mr. McDonnell's Class B
common stock at the same price and upon the same terms and conditions offered by
the third party in the private sale.

     We have also agreed to maintain certain basic financial and information
reporting standards and have agreed to allow McDATA Holdings Corporation and
John McDonnell to inspect our books. We have also agreed, for the benefit of
McDATA Holdings Corporation and John McDonnell and their assignees, to make and
keep available certain information concerning us at all times after the
effective date of the registration statement of which this prospectus is a part;
and to file all reports and documents required of us under the Securities
Exchange Act of 1934.

     We have also agreed to require that all our employees enter into
non-competition agreements prohibiting them from competing with us for one year
after termination of their employment for any reason and have agreed to require
all our employees and consultants to enter into assignment of

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<PAGE>   63

inventions agreements which state that all confidential, proprietary or other
trade secret information and all other discoveries, inventions, processes,
methods and improvements made by them are our property.

SERVICES AGREEMENT

     Pursuant to the Services Agreement entered into on October 1, 1997 by and
among EMC, McDATA Holdings Corporation and us, we have agreed to continue the
ESCON business on behalf of McDATA Holdings Corporation and to perform all of
McDATA Holdings Corporation's duties and responsibilities under the ESCON
contracts for a specified service fee. All revenues from IBM under the ESCON
contracts flow directly to McDATA Holdings Corporation, with the exception of
any and all revenues generated by the sale of the FICON Bridge card to IBM,
which flow directly to us. McDATA Holdings Corporation has retained all
liability for (1) costs for the purchase of materials and supplies for the
production of ESCON products and (2) any royalty costs related to the ESCON
contracts. Under the Services Agreement, we are responsible for all obligations
incurred in the ordinary course of its business, including performance
obligations incurred under the Services Agreement. McDATA Holdings Corporation
has agreed to reimburse us for raw materials used in the production of such
goods. We share liability with McDATA Holdings Corporation, in proportion to the
respective amounts of revenue we receive pursuant to the Services Agreement, for
certain liabilities and costs that may arise in connection with the ESCON
contracts, including claims for intellectual property infringement, breach of
warranty claims, and other liabilities not incurred in the ordinary course.

     In addition, we have agreed not to perform any work that would conflict in
any material way with our performance under the Services Agreement or the ESCON
contracts. The Services Agreement may only be terminated by the mutual consent
of EMC, McDATA Holdings Corporation and us. In addition, pursuant to a letter
agreement dated April 19, 1999 by and between us and McDATA Holdings
Corporation, all revenues generated from the sale of the FICON Bridge card will
be paid directly to us.

TECHNOLOGY RIGHTS AGREEMENT

     In connection with our reorganization in October 1997, we entered into a
Technology Rights Agreement with EMC and McDATA Holdings Corporation on October
1, 1997. Pursuant to the Technology Rights Agreement, McDATA Holdings
Corporation transferred to us all its right, title and interest to its high
performance connectivity products including ESCON and fibre channel used
primarily in information switching applications, except for any connectivity
technology related to storage products owned by EMC. EMC retained all rights,
title and interest in enterprise storage products, including ICDA and software
applications used primarily in computer and network based applications.

     McDATA Holdings Corporation and EMC retained the right and license
(including the right to sublicense) to make, use and sell all high performance
connectivity products used primarily in information switching applications
transferred to us, including ESCON and fibre channel products. However, except
for ESCON connectivity products, McDATA Holdings Corporation and EMC and their
sublicensees may only embed the high performance connectivity products to which
EMC and McDATA Holdings Corporation retained rights and licenses pursuant to the
Technology Rights Agreement as additional functionality into EMC's current and
future storage products. Additionally, McDATA Holdings Corporation and EMC have
no license under the Technology Rights Agreement to any of the trademark or
service mark rights assigned to us.

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<PAGE>   64

     We have also agreed that if the obligation to sell ESCON products
exclusively to IBM terminates or expires, we will work exclusively with McDATA
Holdings Corporation to make available any ESCON products for sale or lease to
third parties.

     Should we fail to supply products which fulfill the contractual commitments
of McDATA Holdings Corporation to IBM, we have agreed to:

     - grant McDATA Holdings Corporation and IBM a license to all of our
       intellectual property rights necessary to fulfill McDATA Holdings
       Corporation's contractual commitments to IBM pursuant to manufacturing
       rights provisions in McDATA Holdings Corporation's contracts with IBM;
       and

     - provide McDATA Holdings Corporation and IBM all documentation and
       information necessary to manufacture the products and fulfill McDATA
       Holdings Corporation's obligations and IBM's requirements pursuant to
       manufacturing rights provisions and within the contractual time frame in
       McDATA Holdings Corporation's contracts with IBM.

     Pursuant to the Technology Rights Agreement, EMC and McDATA Holdings
Corporation agreed to certain non-competition covenants, which have been amended
and superceded by the Master Confidential Disclosure and License Agreement.

                          THE PRE-OFFERING AGREEMENTS

     We have provided below a summary description of the agreements that we have
entered into with EMC in connection with the offering and the distribution. This
description, which summarizes the material terms of such agreements, is not
complete. You should read the full text of these agreements, which have been
filed with the Securities and Exchange Commission as exhibits to the
registration statement of which this prospectus is a part.

MASTER TRANSACTION AGREEMENT

     We recently entered into a Master Transaction Agreement with EMC that
contains key provisions relating to the offering, to our relationship with EMC
after the offering and to the proposed distribution of our shares of Class A
common stock owned by EMC to stockholders of EMC.

     The Distribution.  EMC currently intends to, approximately six to twelve
months following the consummation of the offering, distribute the shares of our
Class A common stock held by it to its stockholders on a pro rata basis. Under
the terms of the Master Transaction Agreement, we agree to prepare an
information statement with EMC and send it to EMC stockholders before the
distribution becomes effective. The information statement will inform the
stockholders of the distribution. EMC may, in its sole discretion, delay the
distribution date for any period of time. EMC intends to consummate the
distribution only if the following conditions, among others, are met, any of
which may be waived by EMC:

     - the Internal Revenue Service must issue a ruling that the distribution of
       our Class A common stock by EMC to EMC stockholders will be tax-free to
       EMC and its stockholders;

     - all required governmental approvals must be in effect;

     - no legal restraints must exist preventing this distribution; and

     - nothing must have happened in the intervening time between this offering
       and the distribution that makes the distribution harmful to EMC or its
       stockholders.

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<PAGE>   65

     Information Exchange.  We have agreed with EMC to share information with
each other, for a variety of purposes, unless the sharing would be commercially
detrimental. In connection with this, we and EMC have agreed as follows:

     - to maintain adequate internal accounting to allow the other party to
       satisfy its own reporting obligations and prepare its own financial
       statements;

     - to retain records beneficial to the other party for a specified period of
       time. If the records are going to be destroyed, the destroying party will
       give the other party an opportunity to retrieve all relevant information
       from the records, unless the records are destroyed in accordance with
       adopted record retention policies; and

     - to use commercially reasonable efforts to provide the other party with
       directors, officers, employees, other personnel and agents who may be
       used as witnesses in and books, records and other documents which may
       reasonably be required in connection with legal, administrative or other
       proceedings.

     Auditing Practices.  So long as EMC is required to consolidate our results
of operations and financial position, we have agreed to:

     - not select a different independent accounting firm from that used by EMC
       without EMC's written consent;

     - use commercially reasonable efforts to enable our auditors to date their
       opinion on our audited annual financial statements on or earlier than the
       date provided by EMC;

     - exchange all relevant information needed to prepare financial statements;

     - grant each other's internal auditors access to each other's records as
       may be reasonably necessary; and

     - notify each other of any change in accounting principles.

     Dispute Resolution.  If disagreements arise between us and EMC regarding
the interpretation or performance of the Master Transaction Agreement, we have
agreed to the following procedures:

     - the parties agree to submit the dispute to binding arbitration; and
       nothing prevents either party acting in good faith from initiating
       litigation at any time if failure to do so would cause serious and
       irreparable injury to one of the parties or to others.

     Expenses.  We will bear all of the costs and expenses related to this
offering as well as the costs and expenses related to distribution, or any costs
and expenses related to any actions taken in furtherance of either of them.

     Termination of the Master Transaction Agreement.  EMC in its sole
discretion can terminate the Master Transaction Agreement and all ancillary
agreements and abandon the distribution at any time prior to the closing of this
offering. Both EMC and we must agree to terminate the Master Transaction
Agreement and all ancillary agreements at any time between the closing of this
offering and the distribution.

INDEMNIFICATION AND INSURANCE MATTERS AGREEMENT

     General Release of Pre-Closing Claims.  Effective as of the date of the
offering, we have released EMC and its affiliates, agents, successors and
assigns, and EMC has released us, and our affiliates, agents, successors and
assigns, from any liabilities arising from events occurring on or before the
offering date, including events occurring in connection with the activities to
implement the initial public offering and the distribution. This provision will
not impair EMC or us from enforcing the

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<PAGE>   66

Master Transaction Agreement, any ancillary agreement or any arrangement
specified in any of these agreements.

     Indemnification.  The Indemnification and Insurance Matters Agreement also
contains provisions governing indemnification. In general, we have agreed to
indemnify EMC and its affiliates, agents, successors and assigns from all
liabilities arising from:

     - our business, any of our liabilities or any of our contracts; and

     - any breach by us of the Master Transaction Agreement or any ancillary
       agreement.

     EMC has agreed to indemnify us and our affiliates, agents, successors and
assigns from all liabilities arising from:

     - EMC's business; and

     - any breach by EMC of the Master Transaction Agreement or any ancillary
       agreement.

     The indemnifying party will make all indemnification payments net of
insurance proceeds that the indemnified party receives. The agreement also
contains provisions governing indemnification procedures.

     Liability Arising From This Prospectus.  We have agreed to bear any and all
liability arising from or relating to any untrue statement of a material fact or
any omission of a material fact in any version of this prospectus or in the
registration statement of which this prospectus forms a part.

     Insurance Matters.  The agreement also contains provisions governing our
insurance coverage during the period between the effective date of this offering
until the earlier of the distribution date or a date specified by EMC upon at
least 90 days notice. We agree to reimburse EMC for premium expenses related to
insurance coverage during this period. In addition, we agree to reimburse EMC
for all amounts necessary to exhaust or satisfy uninsured retention, deductible
and similar amounts in connection with our liabilities that are covered under
such insurance, as well as for all amounts incurred by EMC to pursue insurance
recoveries on our behalf. Prior to the date that the insurance coverage
terminates, EMC will maintain insurance policies on our behalf that are
generally comparable to those maintained generally by EMC on behalf of itself
and its subsidiaries, if at all. EMC is not prohibited, however, from presenting
claims on its own behalf that exhaust such insurance coverage. There can be no
guarantee that the amount, terms or scope of any such coverage will not be
materially inferior to the level of coverage maintained by EMC immediately prior
to this offering.

     Environmental Matters.  We and EMC have generally assumed environmental
liabilities associated with the operation of our respective businesses. This
would include, for example, liabilities associated with non-compliance with
environmental laws prior to the date of the offering. In addition, we agree to
indemnify EMC and its affiliates, subsidiaries, agents, successors and assigns
from claims, investigations or other allegations of liabilities associated with
environmental contamination at any property other than that owned, leased or
used by EMC.

     Each party will be responsible for all liabilities associated with any
environmental contamination caused by that party after the offering.

     Assignment.  The indemnification and insurance matters agreement is not
assignable by either party without prior written consent.

MASTER CONFIDENTIAL DISCLOSURE AND LICENSE AGREEMENT

     Pursuant to the Master Confidential Disclosure and License Agreement, we
and EMC agree not to disclose confidential information of the other party except
in specific circumstances. We and EMC

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<PAGE>   67

also agree not to use this information in violation of any use restrictions in
one of the other written agreements between us.

     Technology.  We agree to grant EMC a fully paid up, unrestricted,
non-exclusive, non-assignable license under our existing patents to manufacture
or sell those products being sold or otherwise distributed by EMC as of the
effective date of this offering, including products existing as of the effective
date of the offering or in development as of that date and first sold or
distributed within one year after that date.

     EMC agrees to grant us a fully paid up, unrestricted, non-exclusive,
non-assignable license under existing EMC patents to manufacture or sell those
products being sold or otherwise distributed by us as of the effective date of
this offering, including products existing as of the effective date of the
offering or in development as of that date and first sold or distributed within
one year after that date. EMC's license to us expires automatically in the event
of an acquisition of us, even though our license to EMC will survive any
acquisition of us or EMC.

     Subject to certain exceptions, EMC has agreed that, for a period of two
years after the effective date of this offering, it will not develop or
manufacture products competitive to our products sold or distributed by us at
any time prior to the effective date of this offering.

     For the same period and subject to certain exceptions, we have agreed not
to develop or manufacture products competitive to EMC products sold or
distributed by EMC at any time prior to the effective date of this offering.

TAX SHARING AGREEMENT

     In general, we will be included in EMC's consolidated group for federal
income tax purposes for so long as EMC beneficially owns at least 80% of the
total voting power and value of our outstanding stock. Each member of a
consolidated group is jointly and severally liable for the federal income tax
liability of each other member of the consolidated group. We have entered into a
tax sharing agreement with EMC, McDATA Holdings Corporation and the other
members of EMC's consolidated group that allocates tax liabilities between us
and the other members of the consolidated group during the period in which we
are included in EMC's consolidated group. We could, however, be liable in the
event that any federal income tax liability is incurred, but not discharged, by
other members of EMC's consolidated group.

     For periods during which we are included in EMC's consolidated group, we
and EMC will make payments to each other such that the amount of taxes to be
paid by us will generally be determined as though we had filed separate federal,
state and local income tax returns. We will be responsible for any taxes with
respect to tax returns that include us and our subsidiaries. In determining the
amount of our tax-sharing payments, EMC will prepare for us pro forma returns
with respect to federal and applicable state and local income taxes.

     The tax sharing agreement provides special rules for determining our share
of any tax liability of EMC's consolidated group for the first year in which we
are no longer included in the consolidated group.

     The tax sharing agreement provides that EMC shall be entitled to any
potential tax benefits attributable to exercises by our employees of options to
acquire shares of EMC common stock, as well as with respect to certain
disqualifying dispositions by our employees of EMC common stock obtained on
exercise of incentive stock options.

     The tax sharing agreement provides that we shall indemnify EMC for any
taxes arising out of the failure of the distribution of our stock by EMC to
EMC's shareholders to qualify as tax-free as a result of actions taken, or the
failure to take action, by us or our subsidiaries. Among other things, we

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<PAGE>   68

are required under the tax sharing agreement to comply with representations made
to the Internal Revenue Service in connection with the request for a private
letter ruling regarding the tax-free nature of the distribution of our stock by
EMC to EMC's shareholders. Moreover, we could have liability to EMC as a result
of events beyond our control, such as a successful tender for our stock.

     In addition, we will agree in the tax sharing agreement not to take or fail
to take any action that would cause the distribution of our stock by EMC to
EMC's shareholders to fail to qualify as a tax-free distribution under the
Internal Revenue Code, undertake any transaction that is treated as a
liquidation or reorganization under the Internal Revenue Code, or issue more
than 35% of our stock in acquisitions or offerings within the 27-month period
following a tax-free distribution of our stock by EMC to EMC's shareholders
unless (1) EMC consents to such action, which consent would not be unreasonably
withheld if we provide EMC with an opinion of nationally recognized counsel or
"Big 5" accounting firm, satisfactory to EMC, that such action will not
adversely affect the tax treatment of the distribution, or (2) EMC obtains, at
our expense, a private letter ruling from the IRS that such action will not
adversely affect the tax treatment of the distribution. The limitations on the
issuance of shares of our stock and other restrictions discussed above could
have a negative impact on our ability to finance our operations and/or prevent
us from being acquired following a tax-free distribution of our stock by EMC to
EMC's shareholders. If the distribution of our stock fails to qualify as a
tax-free distribution, EMC would incur tax liability as if our stock that was
distributed by EMC had been sold by EMC for its fair market value in a taxable
transaction. In the event that we are required to indemnify EMC because the
distribution of our Class A common stock fails to qualify as a tax-free
distribution, our liability could exceed 35% of the value of the Class A common
stock distributed by EMC determined as of the date of the distribution.

     Under the tax sharing agreement, EMC is entitled to all potential tax
benefits relating to (1) exercises by our employees of options to acquire EMC
common stock, and (2) disqualifying dispositions (within the meaning of Section
421(b) of the Internal Revenue Code of 1986) by our employees of EMC common
stock obtained on exercise of incentive stock options. As of July 2000, our
employees will hold vested options to acquire approximately 788,000 shares of
EMC common stock. These options will generally be permitted to be exercised
until the day before the date EMC can no longer include us in its consolidated
federal income tax return. Disqualifying dispositions of EMC common stock by our
employees which occur after that date could result in the availability of
deductions to us equal to the difference between the fair market value of our
stock on the date the options are exercised and their exercise price, and the
tax sharing agreement will require us to pay EMC an amount equal to 37 percent
of those deductions regardless of whether our tax liability is actually reduced
by them.

     For periods during which we are included in EMC's consolidated group, (1)
EMC will be the sole and exclusive agent for us in any and all matters relating
to tax liabilities covered by the tax sharing agreement, (2) EMC will have sole
responsibility for the preparation and filing of consolidated federal and
consolidated or combined or unitary state income tax returns or amended returns,
and (3) EMC will have the power, in its sole discretion, to contest, compromise
or settle any asserted tax adjustment or deficiency and to file, litigate or
compromise any claim for refund on our behalf. For periods after we are no
longer members of EMC's consolidated group, and for any taxes which are not
covered by the tax sharing agreement, we will have sole responsibility for
preparing and filing tax returns and contesting, compromising or settling any
audits or controversies relating thereto.

                               EMC OEM AGREEMENT

     We recently entered into an OEM Purchase and License Agreement with EMC
that governs EMC's purchases of our products and the grant to EMC of rights to
use and support, and to distribute software for use in connection with, these
products. Except for EMC's grant to us of

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<PAGE>   69

trademark licenses for the private labeling of the products and for the
ownership of certain EMC custom features, which will remain in EMC, the
agreement does not transfer any intellectual property. The agreement does not
commit EMC to purchase any products from us. For as long as the agreement is
effective, we have agreed to ensure that the products it sells to EMC are
compliant with Fibre Channel industry standards.

     The agreement has an initial term of five years and may be extended for
additional one-year periods at the request of either party. EMC may terminate
the agreement on sixty days' prior written notice. Either party may terminate in
the event of an uncured material breach or in the event of any insolvency or
cessation of operations. With respect to us, such an event would give EMC a
right to a source code escrow and manufacturing rights license.

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<PAGE>   70

                             PRINCIPAL STOCKHOLDERS

     The following table sets forth certain information concerning the
beneficial ownership of our common stock as of April 30, 2000. Unless otherwise
indicated, the address of each listed shareholder is c/o McDATA Corporation, 310
Interlocken Parkway, Broomfield, CO 80021.

     We have determined beneficial ownership in accordance with the rules of the
Securities and Exchange Commission. Except as indicated by the footnotes below,
we believe, based on the information furnished to us, that the persons and
entities named in the tables below have sole voting and investment power with
respect to all shares of common stock that they beneficially own, subject to
applicable community property laws. We have based our calculation of the
percentage of beneficial ownership on 93,774,810 shares of common stock
outstanding on April 30, 2000 and           shares of common stock outstanding
upon completion of this offering.

     In computing the number of shares of common stock beneficially owned by a
person and the percentage ownership of that person, we deemed outstanding shares
of common stock subject to options held by that person that are currently
exercisable or exercisable within 60 days of April 30, 2000. We did not deem
these shares outstanding, however, for the purpose of computing the percentage
ownership of any other person. Asterisks represent beneficial ownership of less
than one percent.

<TABLE>
<CAPTION>
                                               NUMBER OF SHARES OF      PERCENT OF SHARES OF
                                                  COMMON STOCK              COMMON STOCK
                                               BENEFICIALLY OWNED        BENEFICIALLY OWNED
                                               BEFORE THE OFFERING     -----------------------
                                              ---------------------    BEFORE THE    AFTER THE
NAME AND ADDRESS OF THE BENEFICIAL OWNER       CLASS       NUMBER       OFFERING     OFFERING
----------------------------------------      -------    ----------    ----------    ---------
<S>                                           <C>        <C>           <C>           <C>
5% STOCKHOLDER
McDATA Holdings Corporation.................  Class A    81,000,000       86.4%            %
EXECUTIVE OFFICERS AND DIRECTORS
John F. McDonnell(1)........................  Class B    10,500,000       11.2%
Richard A. Carlson..........................  Class B       400,000          *
Michael B. Gustafson(2).....................  Class B        50,000          *
James E. Kuenzel............................  Class B            --         --           --
Dee J. Perry................................  Class B       400,000          *
Jeffery O. Vogel(3).........................  Class B        50,000          *
David M. Weishaar...........................  Class B            --         --           --
David A. Donatelli..........................  Class B            --         --           --
John W. Gerdelman(4)........................  Class B        30,000          *
Charles C. Johnston(5)......................  Class B        30,000          *
D. Van Skilling(6)..........................  Class B        30,000          *
Thomas M. Uhlman(7).........................  Class B        30,000          *
Laurence G. Walker(8).......................  Class B        30,000          *
All Executive Officers and Directors as a
  group (13 persons)(9).....................  Class B     11,550,00       12.3%
</TABLE>

-------------------------
(1)  Includes 20,000 shares held by the McDonnell Family Partnership, L.L.L.P.,
     a limited liability limited partnership of which Mr. McDonnell is the
     general partner; 2,000,000 shares held by Patricia L. McDonnell, Mr.
     McDonnell's wife; 25,000 shares held by Patricia L. McDonnell, as

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<PAGE>   71

     custodian for a custodial account; and 440,000 shares subject to stock
     options exercisable within 60 days after April 30, 2000. Mr. McDonnell
     disclaims beneficial ownership of the shares of Class B common stock held
     by Mrs. McDonnell personally and as custodian.

(2)  Includes 50,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(3)  Includes 50,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(4)  Includes 30,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(5)  Includes 30,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(6)  Includes 30,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(7)  Includes 30,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(8)  Includes 30,000 shares subject to stock options exercisable within 60 days
     after April 30, 2000.

(9) Includes an aggregate of 690,000 shares subject to stock options exercisable
    within 60 days after April 30, 2000.

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<PAGE>   72

                          DESCRIPTION OF CAPITAL STOCK

     The following is a description of our capital stock and certain provisions
of our amended and restated certificate of incorporation and our amended and
restated by-laws. Statements contained in this prospectus relating to such
provisions are not necessarily complete, and reference is made to the amended
and restated certificate of incorporation and the amended and restated by-laws
that will be in effect upon the completion of this offering, copies of which
have been filed with the Securities and Exchange Commission as exhibits to our
registration statement of which this prospectus constitutes a part. The amended
and restated certificate of incorporation and the amended and restated by-laws
described below will become effective at the time of completion of this
offering.

     Upon completion of this offering, our authorized capital stock will consist
of 250,000,000 shares of Class A common stock, par value $.01 per share,
200,000,000 shares of Class B common stock, par value $0.01 per share, and
25,000,000 shares of preferred stock, par value $0.01 per share.

COMMON STOCK

     As of April 30, 2000, there were 81,000,000 shares of Class A common stock
outstanding and held of record by one stockholder and   shares of Class B common
stock outstanding and held of record by   stockholders. Upon completion of this
offering, there will be 81,000,000 shares of our Class A common stock
outstanding and   shares of our Class B common stock outstanding. As of March
31, 2000, there were no outstanding stock options for the purchase of shares of
Class A common stock, and there were outstanding options for the purchase of a
total of 12,462,964 shares of our Class B common stock. We are not offering for
sale to the public any shares of our Class A common stock. No shares of our
Class A common stock will be issued pursuant to this offering. Shares of our
Class A and Class B common stock have the following rights, preferences and
privileges:

     - Voting Rights.  Each outstanding share of Class A common stock entitles
       its holder to one vote on all matters submitted to a vote of our
       stockholders, including the election of directors. Each outstanding share
       of Class B common stock entitles its holder to one-tenth ( 1/10) of one
       vote on all matters submitted to a vote of our stockholders, including
       the election of directors. There are no cumulative voting rights. Our
       Class A common stock and Class B common stock vote together as one class
       on all matters. Based on the number of shares of our Class A and Class B
       common stock outstanding as of April 30, 2000 and proposed to be
       outstanding after the offering, the holders of a plurality of the shares
       of Class A common stock voting for the election of directors may elect
       all of our directors standing for election.

     - Dividends.  Subject to the rights of the holders of preferred stock if
       any, the holders of Class A and Class B common stock are entitled to
       receive dividends at the same rate, as, when and if dividends are
       declared by our board of directors out of assets legally available for
       the payment of dividends. No dividends shall be paid on or declared and
       set apart for the shares of Class A or Class B common stock unless at the
       same time an equal dividend shall be paid on or declared or set apart for
       the shares of the other class of common stock.

     - Liquidation.  In the event of a liquidation, dissolution or winding up of
       our affairs, whether voluntary or involuntary, after payment of our
       liabilities and obligations to creditors and any holders of preferred
       stock, our remaining assets will be distributed ratably among the holders
       of shares of Class A common stock and Class B common stock on a per share
       basis, regardless of class.

     - Rights and Preferences.  The Class A and Class B common stock have no
       preemptive, redemption, conversion or subscription rights. The rights,
       powers, preferences and privileges of holders of our common stock are
       subject to, and may be adversely affected by, the rights of

                                       70
<PAGE>   73

the holders of shares of any series of preferred stock that we may designate and
issue in the future.

     - Merger.  In the event of a merger or consolidation of us with or into
       another entity, holders of each share of Class A common stock and Class B
       common stock will be entitled to receive the same per share
       consideration. However, if the consideration is voting securities,
       holders of Class A common stock may receive ten times the number of such
       securities as given to the holders of Class B common stock.

PREFERRED STOCK

     The board of directors is authorized to issue preferred stock with voting,
conversion and other rights and preferences that could adversely affect the
voting power or other rights of the holders of Class B common stock. We have no
current plans to issue any preferred stock. However, the issuance of preferred
stock or of rights to purchase preferred stock could have the effect of making
it more difficult for a third party to acquire, or of discouraging a third party
from attempting to acquire, a majority of our outstanding common stock.

PREEMPTIVE RIGHTS

     Pursuant to the terms of the Investors Rights Agreement dated as of October
1, 1997 by and among us, EMC and the holders of our Class A common stock and
Class B common stock, we agreed to certain protective provisions in favor of
McDATA Holdings Corporation, a subsidiary of EMC and the holder of all of the
outstanding shares of our Class A common stock. In particular, we agreed that in
the event that we issue any equity securities, or any other event occurs, that
would result in McDATA Holdings Corporation's percentage interest in the voting
power or value of all of our outstanding capital stock to fall below 50%, then
McDATA Holdings Corporation would have the right to purchase equity securities
(for the price and upon the terms and conditions in the proposed issuance) in an
amount sufficient to enable it to maintain a 50% interest in the voting power or
value of all of our outstanding capital stock. EMC presently intends to
terminate this right at the time of its contemplated distribution of our Class A
common stock to its stockholders.

RIGHT OF FIRST REFUSAL

     Pursuant to the terms of the Investors Rights Agreement, McDATA Holdings
Corporation also has, in certain circumstances, a right of first refusal with
respect to common stock held by Mr. McDonnell. McDATA Holdings Corporation has
the right to purchase Mr. McDonnell's Class B common stock if Mr. McDonnell is
no longer employed by us and wishes to sell his Class B common stock in a
private sale. McDATA Holdings Corporation has the right to purchase Mr.
McDonnell's Class B common stock at the price and upon the terms and conditions
offered by the third party in the private sale.

ANTI-TAKEOVER EFFECTS OF PROVISIONS OF OUR CHARTER AND BY-LAWS

     Our amended and restated certificate of incorporation and amended and
restated by-laws contain certain provisions that could discourage, delay or
prevent a change in control of McDATA or an acquisition of McDATA at a price
that many stockholders may find attractive. The existence of these provisions
could limit the price that investors might be willing to pay in the future for
shares of common stock.

     Blank Check Preferred Stock.  As noted above, our board of directors,
without stockholder approval, will have the authority under our amended and
restated certificate of incorporation to issue preferred stock with rights
superior to the rights of the holders of Class B common stock. As a result,
preferred stock could be issued quickly and easily, could adversely affect the
rights of holders of

                                       71
<PAGE>   74

Class B common stock and could be issued with terms calculated to delay or
prevent a change of control or make removal of management more difficult.

     Staggered Board -- Election and Removal of Directors.  Our amended and
restated certificate of incorporation provides for the division of the board of
directors into three classes as nearly equal in size as possible with staggered
three-year terms. Newly created directorships resulting from an increase in the
authorized number of directors may be filled by a majority of the Board of
Directors then in office, provided a quorum is present and any other vacancy
occurring on the board of directors may be filled only by a majority of the
directors then in office, even though less than a quorum may then be in office.
These provisions may have the effect of discouraging a third-party from
initiating a proxy contest, making a tender offer or otherwise attempting to
gain control of us, or attempting to change the composition or policies of the
board of directors.

     Stockholder Meetings and Action.  Our amended and restated by-laws provide
that special meetings of stockholders may be called by (1) the Chairman of the
Board of Directors, (2) the Chief Executive Officer, (3) the Board of Directors
pursuant to a resolution adopted by a majority of the total number of authorized
directors (whether or not there exist any vacancies in previously authorized
directorships at the time any such resolution is presented to the board of
directors for adoption), or (4) stockholders who are entitled to cast at least
seventy percent (70%) of the total number of votes entitled to be cast at an
election of directors; and shall be held at such place, on such date, and at
such time as the board of directors, shall fix. Our amended and restated by-laws
also provide that stockholder action may be taken at a duly called and convened
annual or special meeting of the stockholders or by written consent of
stockholders who are entitled to cast at least seventy percent (70%) of the
total number of votes entitled to be cast. These provisions, taken together, may
in the future prevent stockholders from forcing consideration by the
stockholders of stockholder proposals over the opposition of the board of
directors, except at an annual meeting.

     Requirement for Advance Notification of Stockholder Nominations and
Proposals.  Our amended and restated by-laws provide that a stockholder seeking
to bring business, including action to nominate candidates for election as
directors at an annual meeting of stockholders, must provide timely notice of
this intention in writing. To be timely, a stockholder notice must be delivered
to our principal executive officers not less than sixty (60) days nor more than
ninety (90) days prior to the anniversary date of the immediately preceding
annual meeting of stockholders. However, if no annual meeting of stockholders
was held the previous year or the date of the annual meeting of stockholders has
been changed more than thirty (30) days from the date contemplated at the time
of the previous year's proxy statement, then the notice by stockholder must be
received not earlier than ninety (90) days prior to the annual meeting of
stockholders and no later than sixty (60) days prior to the annual meeting of
stockholders or, in the event that public announcement of the date of the annual
meeting is first made by us fewer than seventy (70) days prior to the date of
such annual meeting, the notice by stockholder must be received within ten (10)
days from the public announcement. These provisions can delay stockholder
action. The Delaware General Corporation Law provides generally that the
affirmative vote of a majority of the shares issued and outstanding is required
to amend a corporation's certificate of incorporation or by-laws, unless a
corporation's certificate of incorporation or by-laws, as the case may be,
requires a greater percentage. Our amended and restated certificate of
incorporation requires the affirmative vote of stockholders who are entitled to
cast at least seventy percent (70%) of the total number of votes entitled to be
cast at an election of directors to amend or repeal any of the foregoing
provisions.

DELAWARE ANTI-TAKEOVER STATUTE

     We are a Delaware corporation subject to Section 203 of the Delaware
General Corporation Law. Under Section 203, some "business combinations" between
a Delaware corporation whose stock

                                       72
<PAGE>   75

generally is publicly traded or held of record by more than 2,000 stockholders
and an "interested stockholder" are prohibited for a three-year period following
the date that the stockholder became an interested stockholder, unless:

     - the corporation has elected in its certificate of incorporation not to be
       governed by Section 203;

     - the transaction which resulted in the stockholder becoming an interested
       stockholder was approved by the board of directors of the corporation
       before the stockholder became an interested stockholder;

     - upon consummation of the transaction which resulted in the stockholder
       becoming an interested stockholder, the interested stockholder owned at
       least 85% of the voting stock of the corporation outstanding at the
       commencement of the transaction, excluding voting stock owned by
       directors who are also officers or held in employee benefit plans in
       which the employees do not have a confidential right to tender stock held
       by the plan in a tender or exchange offer; or

     - the business combination is approved by the board of directors of the
       corporation and authorized at a meeting by two-thirds of the voting stock
       which the interested stockholder did not own.

We have not made an election in our amended and restated certificate of
incorporation to opt-out of Section 203.

     In addition to the above exceptions to Section 203, the three-year
prohibition does not apply to some business combinations proposed by an
interested stockholder following the announcement or notification of an
extraordinary transaction involving the corporation and a person who had not
been an interested stockholder during the previous three years or who became an
interested stockholder with the approval of a majority of the corporation's
directors. The term "business combination" is defined generally to include
mergers or consolidations, transactions involving the assets or stock of the
corporation or its majority-owned subsidiaries and transactions which increase
an interested stockholder's percentage ownership of stock. The term "interested
stockholder" is defined generally as a stockholder who becomes beneficial owner
of 15% or more of a Delaware corporation's voting stock, or is an affiliate or
associate of the corporation and was the owner of 15% or more of the outstanding
voting stock of the corporation at any time within the three year period
immediately prior to the date on which it is sought to be determined whether
such person is an interested stockholder, together with the affiliates or
associates of that stockholder.

LIMITATION OF LIABILITY AND INDEMNIFICATION

     Our amended and restated certificate of incorporation and amended and
restated by-laws provide that we shall indemnify our directors and officers to
the fullest extent that Delaware law permits. Delaware law permits a corporation
to indemnify any director, officer, employee or agent made or threatened to be
made a party to any pending or completed proceeding if the person acted in good
faith and in a manner that the person reasonably believed to be in the best
interests of the corporation and, with respect to any criminal proceeding, had
no reasonable cause to believe that his or her conduct was unlawful.

     Our amended and restated certificate of incorporation limits the liability
of our directors to the maximum extent permitted by Delaware law. Delaware law
provides that directors will not be

                                       73
<PAGE>   76

personally liable for monetary damages for breach of their fiduciary duties as
directors, except liability for:

     - any breach of their duty of loyalty to the corporation or its
       stockholders;

     - acts or omissions not in good faith or which involve intentional
       misconduct or a knowing violation of law;

     - unlawful payments of dividends or unlawful stock repurchases or
       redemptions; or

     - any transaction from which the director derived an improper personal
       benefit.

     This provision has no effect on any non-monetary remedies that may be
available to us or our stockholders, nor does it relieve us or our officers or
directors from compliance with federal or state securities laws.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers, or persons controlling us under
the provisions that we describe above or otherwise, we have been informed that
in the opinion of the Securities and Exchange Commission, this indemnification
is against public policy as expressed in the Securities Act of 1933 and is
therefore unenforceable.

     Our amended and restated by-laws also permit us to purchase and maintain
insurance on behalf of any officer or director for any liability arising out of
his or her actions in that capacity, regardless of whether our by-laws would
otherwise permit indemnification for that liability. We currently have liability
insurance for our officers and directors.

     At the present time, there is no pending litigation or proceeding involving
any of our directors, officers, employees or agents in which indemnification
will be required or permitted. We are not aware of any threatened litigation or
proceeding which may result in a claim for indemnification.

TRANSFER AGENT AND REGISTRAR

     The transfer agent and registrar for the Class B common stock is         .

                                       74
<PAGE>   77

                        SHARES ELIGIBLE FOR FUTURE SALE

     All of the shares of our Class B common stock sold in this offering will be
freely tradable without restriction under the Securities Act of 1933, except for
any shares that may be acquired by an affiliate of McDATA, as that term is
defined in Rule 144 under the Securities Act of 1933. Persons who may be deemed
to be affiliates generally include individuals or entities that control, are
controlled by, or are under common control with, us and may include our
directors and officers as well as our significant stockholders, if any.

     The shares of our Class A common stock held by EMC before the distribution
are deemed "restricted securities" as defined in Rule 144, and may not be sold
other than through registration under the Securities Act of 1933 or under an
exemption from registration, such as the exemptions provided by Rule 144, Rule
144(k) or Rule 701.

     EMC currently plans approximately six to twelve months following this
offering to distribute all of the shares of our Class A common stock indirectly
owned by EMC, or 81 million shares, which is 100% of our Class A common stock,
to the holders of EMC's common stock. Shares of our Class A common stock
distributed to EMC stockholders in the distribution generally will be freely
transferable, except for shares of Class A common stock received by persons who
may be deemed to be affiliates. Persons who are affiliates will be permitted to
sell the shares of common stock that are issued in this offering or that they
receive in the distribution only through registration under the Securities Act
of 1933, or under an exemption from registration, such as the exemptions
provided by Rule 144, Rule 144(k) or Rule 701 under the Securities Act of 1933.

     In general, under Rule 144, commencing 90 days after the date of this
prospectus, a person who has beneficially owned shares of our common stock for
at least one year, including persons who are affiliates, is entitled to sell
within any three-month period a number of shares that does not exceed the
greater of:

     - 1% of the number of shares of common stock then outstanding, which is
       expected to be approximately        shares upon completion of this
       offering; or

     - the average weekly trading volume of the common stock on The Nasdaq
       National Market during the four calendar weeks preceding the filing of a
       notice on Form 144 with respect to a sale, subject to restrictions
       specified in Rule 144.

     Sales under Rule 144 are also subject to manner of sale provisions and
notice requirements and to the availability of current public information about
us. Commencing 90 days after the date of this prospectus,        shares of our
Class B common stock not subject to lock-up agreements will be available for
resale to the public in accordance with Rule 144.

     Under Rule 144(k), a person who has not been one of our affiliates at any
time during the three months preceding a sale, and who has beneficially owned
the shares proposed to be sold for at least two years, is entitled to sell those
shares without regard to the volume, manner-of-sale or other limitations
contained in Rule 144. Upon completion of this offering,           shares of our
Class B common stock may be sold under Rule 144(k).

     In general, any of our employees who purchase shares from us in connection
with a compensatory stock plan or other written agreement in a transaction
exempt under Rule 701 of the Securities Act of 1933 is eligible to resell the
shares 90 days after the effective date of this offering in reliance on Rule
144, but without compliance with various restrictions, including the holding
period, contained in Rule 144.

     Our directors, officers and other stockholders have agreed, with certain
limited exceptions, not to offer, sell, contract to sell or, with limited
exception, otherwise dispose of any shares of Class B common stock or any
security convertible into Class B common stock for a period of 180 days from
                                       75
<PAGE>   78

the date of this prospectus without the prior written consent of Credit Suisse
First Boston Corporation. These directors, officers and other stockholders will
own        shares of Class B common stock, based upon their beneficial ownership
as of December 31, 1999. Upon expiration of the lock-up period, 180 days after
the date of this prospectus,        shares of Class B common stock will be
available for resale to the public in accordance with Rule 144.

     We will grant options to purchase shares of our Class B common stock
pursuant to our 1997 Stock Option Plan, subject to certain restrictions. See the
section of this prospectus titled "Employee Benefit Plans." Upon completion of
this offering, we intend to file a registration statement under the Securities
Act of 1933 to register shares reserved for issuance under the 1997 Stock Option
Plan. That registration statement will become effective immediately upon filing.
Accordingly, shares covered by that registration statement will become eligible
for sale in the public markets, subject to vesting restrictions, Rule 144 volume
limitations applicable to our affiliates or the lock-up agreements with Credit
Suisse First Boston Corporation.

                                       76
<PAGE>   79

                                  UNDERWRITING

     Under the terms and subject to the conditions contained in an underwriting
agreement dated           , 2000, we have agreed to sell to the underwriters
named below, for whom Credit Suisse First Boston Corporation, Deutsche Bank
Securities Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated are
acting as representatives, the following respective numbers of shares of Class B
common stock:

<TABLE>
<CAPTION>
UNDERWRITERS                                                  NUMBER OF SHARES
------------                                                  ----------------
<S>                                                           <C>
Credit Suisse First Boston Corporation......................
Deutsche Bank Securities Inc. ..............................
Merrill Lynch, Pierce, Fenner & Smith
             Incorporated...................................
                                                                   ------
  Total.....................................................
                                                                   ======
</TABLE>

     The underwriting agreement provides that the underwriters are obligated to
purchase all the shares of Class B common stock in the offering if any are
purchased, other than those shares covered by the over-allotment option
described below. The underwriting agreement also provides that if an underwriter
defaults the purchase commitments of non-defaulting underwriters may be
increased or the offering of Class B common stock may be terminated.

     We have granted to the underwriters a 30-day option to purchase on a pro
rata basis up to        additional shares at the initial public offering price
less the underwriting discounts and commissions. The option may be exercised
only to cover any over-allotments of Class B common stock.

     The underwriters propose to offer the shares of Class B common stock
initially at the public offering price on the cover page of this prospectus and
to selling group members at that price less a concession of $       per share.
The underwriters and selling group members may allow a discount of $       per
share on sales to other broker/dealers. After the initial public offering, the
public offering price and concession and discount to broker/dealers may be
changed by the representatives.

     The following table summarizes the compensation and estimated expenses we
will pay:

<TABLE>
<CAPTION>
                                           PER SHARE                           TOTAL
                                -------------------------------   -------------------------------
                                   WITHOUT            WITH           WITHOUT            WITH
                                OVER-ALLOTMENT   OVER-ALLOTMENT   OVER-ALLOTMENT   OVER-ALLOTMENT
                                --------------   --------------   --------------   --------------
<S>                             <C>              <C>              <C>              <C>
Underwriting Discounts and
  Commissions paid by us......      $                $                $                $
Expenses payable by us........
</TABLE>

     The underwriters have informed us that they do not expect discretionary
sales to exceed 5% of the shares of Class B common stock being offered.

     We have agreed not to offer, sell, contract to sell, pledge or otherwise
dispose of, directly or indirectly, or file with the Securities and Exchange
Commission a registration statement under the Securities Act of 1933 relating
to, any shares of our Class B common stock or securities convertible into or
exchangeable or exercisable for any shares of our Class B common stock, or
publicly disclose the intention to make any such offer, sale, pledge,
disposition or filing, without the prior written consent of Credit Suisse First
Boston Corporation for a period of 180 days after the date of this prospectus.

     EMC, our officers, directors and other stockholders have agreed not to
offer, sell, contract to sell, pledge or otherwise dispose of, directly or
indirectly, any shares of our Class B common stock or securities convertible
into or exchangeable or exercisable for any shares of our Class B common

                                       77
<PAGE>   80

stock, enter into a transaction which would have the same effect, or enter into
any swap, hedge or other arrangement that transfers, in whole or in part, any of
the economic consequences of ownership or our Class B common stock, whether any
such aforementioned transaction is to be settled by delivery of our Class B
common stock or such other securities, in cash or otherwise, or publicly
disclose the intention to make any such offer, sale, pledge or disposition, or
to enter into any such transaction, swap, hedge or other arrangement, without,
in each case, the prior written consent of Credit Suisse First Boston
Corporation for a period of 180 days after the date of this prospectus.

     We have agreed to indemnify the underwriters against liabilities under the
Securities Act of 1933, or contribute to payments that the underwriters may be
required to make in that respect.

     We have applied to list the shares of Class B common stock on The Nasdaq
National Market under the symbol "MCDT".

     Prior to this offering, there has been no public market for the Class B
common stock. The initial public offering price has been determined by
negotiation between us and the representatives. The principal factors considered
in determining the public offering price included:

     - the information set forth in this prospectus and otherwise available to
       the representatives;

     - the history and the prospects for the industry in which we will compete;

     - the ability of our management;

     - the prospects for our future earnings;

     - the present state of our development and our current financial condition;

     - the general condition of the securities markets at the time of this
       offering; and

     - the recent market prices of, and the demand for, publicly-traded common
       stock of generally comparable companies.

     The initial offering price may not correspond to the price at which our
Class B common stock will trade in the initial market subsequent to this
offering, and an active trading market for our Class B common stock may not
develop or continue after this offering.

     The representatives may engage in over-allotment, stabilizing transactions,
syndicate covering transactions and penalty bids in accordance with Regulation M
under the Securities Exchange Act of 1934.

     - Over-allotment involves syndicate sales in excess of the offering size,
       which creates a syndicate short position.

     - Stabilizing transactions permit bids to purchase the underlying security
       so long as the stabilizing bids do not exceed a specified maximum.

     - Syndicate covering transactions involve purchases of the Class B common
       stock in the open market after the distribution has been completed in
       order to cover syndicate short positions.

     - Penalty bids permit the representatives to reclaim a selling concession
       from a syndicate member when the Class B common stock originally sold by
       such syndicate member is purchased in a stabilizing or syndicate covering
       transaction to cover syndicate short positions.

These stabilizing transactions, syndicate covering transactions and penalty bids
may cause the price of the Class B common stock to be higher than it would
otherwise be in the absence of these transactions. These transactions may be
effected on The Nasdaq National Market or otherwise and, if commenced, may be
discontinued at any time.

                                       78
<PAGE>   81

     A prospectus in electronic format will be made available on the Web sites
maintained by one or more of the underwriters participating in this offering.
The representatives may agree to allocate a number of shares to underwriters for
sale to their online brokerage account holders. Internet distributions will be
allocated by the underwriters that will make internet distributions on the same
basis as other allocations.

                                       79
<PAGE>   82

                          NOTICE TO CANADIAN RESIDENTS

RESALE RESTRICTIONS

     The distribution of the Class B common stock in Canada is being made only
on a private placement basis exempt from the requirement that we prepare and
file a prospectus with the securities regulatory authorities in each province
where trades of Class B common stock are effected. Accordingly, any resale of
the Class B common stock in Canada must be made in accordance with applicable
securities laws which will vary depending on the relevant jurisdiction, and
which may require resales to be made in accordance with available statutory
exemptions or pursuant to a discretionary exemption granted by the applicable
Canadian securities regulatory authority. Purchasers are advised to seek legal
advice prior to any resale of the Class B common stock.

REPRESENTATIONS OF PURCHASERS

     Each purchaser of Class B common stock in Canada who receives a purchase
confirmation will be deemed to represent to us and the dealer from whom such
purchase confirmation is received that (1) such purchaser is entitled under
applicable provincial securities laws to purchase such common stock without the
benefit of a prospectus qualified under such securities laws; (2) where required
by law, that such purchaser is purchasing as principal and not as agent, and (3)
such purchaser has reviewed the text above under "Resale Restrictions."

RIGHTS OF ACTION (ONTARIO PURCHASERS)

     The securities being offered are those of a foreign issuer and Ontario
purchasers will not receive the contractual right of action prescribed by
Ontario securities law. As a result, Ontario purchasers must rely on other
remedies that may be available, including common law rights of action for
damages or rescission or rights of action under the civil liability provisions
of the U.S. federal securities laws.

ENFORCEMENT OF LEGAL RIGHTS

     All of the issuer's directors and officers as well as the experts named
herein may be located outside of Canada and, as a result, it may not be possible
for Canadian purchasers to effect service of process within Canada upon the
issuer or such persons. All or a substantial portion of the assets of the issuer
and such persons may be located outside of Canada and, as a result, it may not
be possible to satisfy a judgment against the issuer or such persons in Canada
or to enforce a judgment obtained in Canadian courts against such issuer or
persons outside of Canada.

NOTICE TO BRITISH COLUMBIA RESIDENTS

     A purchaser of Class B common stock to whom the Securities Act (British
Columbia) applies is advised that such purchaser is required to file with the
British Columbia Securities Commission a report within ten days of the sale of
any Class B common stock acquired by such purchaser in this offering. Such
report must be in the form attached to British Columbia Securities Commission
Blanket Order BOR #95/17, a copy of which may be obtained from us. Only one such
report must be filed in respect of Class B common stock acquired on the same
date and under the same prospectus exemption.

TAXATION AND ELIGIBILITY FOR INVESTMENT

     Canadian purchasers of Class B common stock should consult with their own
legal and tax advisors with respect to the United States, Canadian and other tax
consequences of an investment in

                                       80
<PAGE>   83

the Class B common stock in their particular circumstances and with respect to
the eligibility of the Class B common stock for investment by the purchaser
under relevant Canadian legislation.

                                 LEGAL MATTERS

     The validity of the shares of common stock offered hereby will be passed
upon for us by Paul T. Dacier, Esq., Senior Vice President and General Counsel
of EMC. Certain other legal matters in connection with this offering will be
passed upon for us by Mr. Dacier and Skadden, Arps, Slate, Meagher & Flom LLP,
Boston, Massachusetts. Certain legal matters in connection with this offering
will be passed upon for the underwriters by Testa, Hurwitz & Thibeault, LLP.

                                    EXPERTS

     The consolidated financial statements as of December 31, 1998 and 1999 and
for each of the three years in the period ended December 31, 1999 included in
this Prospectus have been included in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.

                                       81
<PAGE>   84

                   WHERE YOU MAY FIND ADDITIONAL INFORMATION

     We have filed with the Securities and Exchange Commission a registration
statement on Form S-1 under the Securities Act of 1933 with respect to the Class
B common stock we propose to sell in this offering. This prospectus, which
constitutes part of the registration statement, does not contain all of the
information set forth in the registration statement. For further information
about us and the Class B common stock we propose to sell in this offering, we
refer you to the registration statement and the exhibits and schedules filed as
a part of the registration statement. Statements contained in this prospectus as
to the contents of any contract or other document filed as an exhibit to the
registration statement are not necessarily complete. If a contract or document
has been filed as an exhibit to the registration statement, we refer you to the
copy of the contract or document that has been so filed.

     You may read or copy any contract, agreement or other document referred to
in this prospectus and any portion of our registration statement at the
Securities and Exchange Commission's public reference room at 450 Fifth Street,
N.W., Judiciary Plaza, Room 1024, Washington, D.C. 20549, and at the
Commission's regional offices located at Citicorp Center, 500 West Madison
Street, Suite 1400, Chicago Illinois 60661-2511 and 7 World Trade Center, Suite
1300, New York, New York 10048. Copies of such material can also be obtained at
prescribed rates by mail from the Securities and Exchange Commission's public
reference room at 450 Fifth Street, N.W., Washington, D.C. 20549. You may obtain
more information about the public reference room by calling the Securities and
Exchange Commission at 1-800-SEC-0330. In addition, the Securities and Exchange
Commission maintains a Web site (http://www.sec.gov) that contains reports,
proxy and information statements and other information regarding registrants
that file electronically with the Securities and Exchange Commission. As a
result of this offering, we will become subject to the information and reporting
requirements of the Securities Exchange Act of 1934, and we will file periodic
reports, proxy statements, and other information with the Securities and
Exchange Commission.

     We intend to furnish our stockholders with annual reports containing
audited financial statements and make available to our stockholders quarterly
reports for the first three quarters of each fiscal year containing unaudited
interim financial information.

                                       82
<PAGE>   85

                               McDATA CORPORATION

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Report of Independent Accountants...........................  F-2
Consolidated Balance Sheets.................................  F-3
Consolidated Statements of Operations.......................  F-4
Consolidated Statements of Changes in Stockholders'
  Equity....................................................  F-5
Consolidated Statements of Cash Flows.......................  F-6
Notes to Consolidated Financial Statements..................  F-7
</TABLE>

                                       F-1
<PAGE>   86

                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Stockholders
of McDATA Corporation:

     The stock split, the increase in the number of authorized shares of the
Company's Class A and B common stock, and the authorization of undesignated
preferred shares described in Note 14 to the notes to consolidated financial
statements have not been consummated at May 26, 2000. When these transactions
are consummated, we will be in a position to furnish the following report:

     "In our opinion, the accompanying consolidated balance sheets and the
related consolidated statements of operations, changes in stockholders' equity
and cash flows present fairly, in all material respects, the financial position
of McDATA Corporation and its subsidiaries at December 31, 1998 and 1999, and
the results of their operations and their cash flows for each of the three years
in the period ended December 31, 1999 in conformity with accounting principles
generally accepted in the United States. These financial statements are the
responsibility of the Company's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with auditing standards generally
accepted in the United States, which require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above."

PricewaterhouseCoopers LLP

Broomfield, Colorado
April 19, 2000

                                       F-2
<PAGE>   87

                               McDATA CORPORATION

                          CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)

<TABLE>
<CAPTION>
                                                               DECEMBER 31,
                                                            -------------------     MARCH 31,
                                                             1998        1999         2000
                                                            -------    --------    -----------
                                                                                   (UNAUDITED)
<S>                                                         <C>        <C>         <C>
ASSETS
Current assets:
  Cash and cash equivalents...............................  $ 2,111    $  6,897     $  8,782
  Accounts receivable, net of allowance for doubtful
     accounts of $65, $95 and $104 (unaudited),
     respectively.........................................    2,636       9,993        6,679
  Receivable from Parent..................................   10,531       3,591       15,784
  Inventories.............................................    4,494       6,952        5,477
  Deferred tax asset......................................    2,046       2,541        3,250
  Prepaid expenses and other current assets...............    2,025       3,115        2,051
                                                            -------    --------     --------
Total current assets......................................   23,843      33,089       42,023
Property and equipment, net...............................   12,120      13,800       14,494
Other assets, net.........................................    3,420       1,461        1,229
                                                            -------    --------     --------
          Total Assets....................................  $39,383    $ 48,350     $ 57,746
                                                            =======    ========     ========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Short term debt -- Parent...............................  $    --    $  1,900     $  1,900
  Accounts payable........................................    3,896       9,013        8,757
  Accrued liabilities.....................................    4,842       4,851        6,998
  Obligations under capital leases........................    1,077       1,586        1,770
                                                            -------    --------     --------
Total current liabilities.................................    9,815      17,350       19,425
Note payable -- Parent....................................    1,900          --           --
Obligations under capital leases..........................    1,262       1,175        1,137
Deferred tax liability....................................      407         275          275
Commitments and contingencies (Note 12)
Stockholders' equity:
  Common stock, Class A, $0.01 par value, 81,000,000
     shares authorized, issued and outstanding............      810         810          810
  Common stock, Class B, $0.01 par value, 29,000,000
     shares authorized, 10,002,000, 11,980,936 and
     12,681,186 (unaudited) shares issued and outstanding
     at December 31, 1998 and 1999 and March 31, 2000,
     respectively.........................................      100         120          127
  Additional paid-in capital..............................   30,799      52,930       53,804
  Deferred compensation...................................       --     (17,567)     (16,401)
  Accumulated deficit.....................................   (5,710)     (6,743)      (1,431)
                                                            -------    --------     --------
Total stockholders' equity................................   25,999      29,550       36,909
                                                            =======    ========     ========
          Total liabilities and stockholders' equity......  $39,383    $ 48,350     $ 57,746
                                                            =======    ========     ========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       F-3
<PAGE>   88

                               McDATA CORPORATION

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE>
<CAPTION>
                                                                           THREE MONTHS
                                                                              ENDED
                                          YEAR ENDED DECEMBER 31,           MARCH 31,
                                       -----------------------------    ------------------
                                        1997       1998       1999       1999       2000
                                       -------    -------    -------    -------    -------
                                                                           (UNAUDITED)
<S>                                    <C>        <C>        <C>        <C>        <C>
Revenues:
Product revenue......................  $ 4,035    $ 5,242    $29,466    $ 2,943    $13,760
Product revenue -- Parent............    1,336      5,632     48,111      4,764     29,271
Service revenue -- Parent............   27,652     25,674     17,686      5,456      4,103
                                       -------    -------    -------    -------    -------
          Total revenue..............   33,023     36,548     95,263     13,163     47,134
Cost of revenues:
Cost of product revenue..............    4,296      3,786     21,040      2,210      7,675
Cost of product revenue -- Parent....      705      3,208     22,897      2,477     13,329
Cost of service revenue -- Parent....    6,269      6,111      5,634      1,403      1,167
                                       -------    -------    -------    -------    -------
          Gross profit...............   21,753     23,443     45,692      7,073     24,963
Operating expenses:
Research and development.............   16,512     18,298     24,001      4,739      7,644
Selling and marketing................    3,747     10,305     15,787      3,341      5,856
General and administrative...........    2,724      3,405      3,940        859      1,357
Amortization of deferred
  compensation.......................       --         --      2,237        142      1,239
                                       -------    -------    -------    -------    -------
          Operating expenses.........   22,983     32,008     45,965      9,081     16,096
                                       -------    -------    -------    -------    -------
Income (loss) from operations........   (1,230)    (8,565)      (273)    (2,008)     8,867
Interest income (expense), net.......      339        323       (872)      (186)       (35)
                                       -------    -------    -------    -------    -------
Income (loss) before income taxes....     (891)    (8,242)    (1,145)    (2,194)     8,832
Income tax expense (benefit).........    2,333     (5,774)      (112)      (214)     3,520
                                       -------    -------    -------    -------    -------
Net income (loss)....................  $(3,224)   $(2,468)   $(1,033)   $(1,980)   $ 5,312
                                       =======    =======    =======    =======    =======
Basic net income (loss) per share....  $ (0.04)   $ (0.03)   $ (0.01)   $ (0.02)   $  0.06
                                       =======    =======    =======    =======    =======
Shares used in computing basic net
  income (loss) per share............   91,000     91,000     91,638     91,014     93,084
                                       =======    =======    =======    =======    =======
Diluted net income (loss) per
  share..............................  $ (0.04)   $ (0.03)   $ (0.01)   $ (0.02)   $  0.05
                                       =======    =======    =======    =======    =======
Shares used in computing diluted net
  income (loss) per share............   91,000     91,000     91,638     91,014     99,103
                                       =======    =======    =======    =======    =======
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       F-4
<PAGE>   89

                               McDATA CORPORATION

           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
                       (IN THOUSANDS, EXCEPT SHARE DATA)
<TABLE>
<CAPTION>
                                        COMMON STOCK
                          -----------------------------------------
                                CLASS A               CLASS B         ADDITIONAL
                          -------------------   -------------------    PAID-IN     DIVISIONAL     DEFERRED     ACCUMULATED
                            SHARES     AMOUNT     SHARES     AMOUNT    CAPITAL       EQUITY     COMPENSATION     DEFICIT
                          ----------   ------   ----------   ------   ----------   ----------   ------------   -----------
<S>                       <C>          <C>      <C>          <C>      <C>          <C>          <C>            <C>
Balances at December 31,
  1996..................          --    $ --            --    $ --     $    --      $ 16,431      $     --       $    --
Net income from January
  1, 1997 to September
  30, 1997..............          --      --            --      --          --            18            --            --
Stock issued in exchange
  for net contributed
  assets................  81,000,000     810            --      --      20,897       (16,449)           --            --
Sale of common stock,
  Class B...............          --      --    10,000,000     100       9,900            --            --            --
Net loss from October 1,
  1997 to December 31,
  1997..................          --      --            --      --          --            --            --        (3,242)
                          ----------    ----    ----------    ----     -------      --------      --------       -------
Balances at December 31,
  1997..................  81,000,000     810    10,000,000     100      30,797            --            --        (3,242)
Issuance of common
  stock, Class B upon
  exercise of stock
  options...............          --      --         2,000      --           2            --            --            --
Net loss................          --      --            --      --          --            --            --        (2,468)
                          ----------    ----    ----------    ----     -------      --------      --------       -------
Balances at December 31,
  1998..................  81,000,000     810    10,002,000     100      30,799            --            --        (5,710)
Issuance of common
  stock, Class B upon
  exercise of stock
  options...............          --      --     1,978,936      20       1,960            --            --            --
Deferred compensation...          --      --            --      --      19,804            --       (19,804)           --
Amortization of deferred
  compensation..........          --      --            --      --          --            --         2,237            --
Tax benefit of stock
  options...............          --      --            --      --         367            --            --            --
Net loss................          --      --            --      --          --            --            --        (1,033)
                          ----------    ----    ----------    ----     -------      --------      --------       -------
Balances at December 31,
  1999..................  81,000,000     810    11,980,936     120      52,930            --       (17,567)       (6,743)
Issuance of common
  stock, Class B upon
  exercise of stock
  options (unaudited)...          --      --       700,250       7         706            --            --            --
Deferred compensation
  (unaudited)...........          --      --            --      --          73            --           (73)           --
Amortization of deferred
  compensation
  (unaudited)...........          --      --            --      --          --            --         1,239            --
Tax benefit of stock
  options (unaudited)...          --      --            --      --          95            --            --            --
Net income
  (unaudited)...........          --      --            --      --          --            --            --         5,312
                          ----------    ----    ----------    ----     -------      --------      --------       -------
Balances at March 31,
  2000 (unaudited)......  81,000,000    $810    12,681,186    $127     $53,804      $     --      $(16,401)      $(1,431)
                          ==========    ====    ==========    ====     =======      ========      ========       =======

<CAPTION>

                              TOTAL
                          STOCKHOLDERS'
                             EQUITY
                          -------------
<S>                       <C>
Balances at December 31,
  1996..................     $16,431
Net income from January
  1, 1997 to September
  30, 1997..............          18
Stock issued in exchange
  for net contributed
  assets................       5,258
Sale of common stock,
  Class B...............      10,000
Net loss from October 1,
  1997 to December 31,
  1997..................      (3,242)
                             -------
Balances at December 31,
  1997..................      28,465
Issuance of common
  stock, Class B upon
  exercise of stock
  options...............           2
Net loss................      (2,468)
                             -------
Balances at December 31,
  1998..................      25,999
Issuance of common
  stock, Class B upon
  exercise of stock
  options...............       1,980
Deferred compensation...          --
Amortization of deferred
  compensation..........       2,237
Tax benefit of stock
  options...............         367
Net loss................      (1,033)
                             -------
Balances at December 31,
  1999..................      29,550
Issuance of common
  stock, Class B upon
  exercise of stock
  options (unaudited)...         713
Deferred compensation
  (unaudited)...........          --
Amortization of deferred
  compensation
  (unaudited)...........       1,239
Tax benefit of stock
  options (unaudited)...          95
Net income
  (unaudited)...........       5,312
                             -------
Balances at March 31,
  2000 (unaudited)......     $36,909
                             =======
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       F-5
<PAGE>   90

                               McDATA CORPORATION

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                         THREE MONTHS
                                                                                            ENDED
                                                          YEAR ENDED DECEMBER 31,         MARCH 31,
                                                        ---------------------------   ------------------
                                                         1997      1998      1999      1999       2000
                                                        -------   -------   -------   -------   --------
                                                                                         (UNAUDITED)
<S>                                                     <C>       <C>       <C>       <C>       <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss).....................................  $(3,224)  $(2,468)  $(1,033)  $(1,980)  $  5,312
Adjustments to reconcile net loss to cash flows from
  operating activities:
    Depreciation and amortization.....................    2,738     4,213     5,734     1,479      2,057
    Inventory provision...............................    2,476     1,326     1,907       165        302
    Noncash compensation expense......................       --        --     2,237       142      1,239
    Changes in current assets and liabilities:
      Accounts receivable.............................      739    (2,344)   (7,357)       (2)     3,314
      Receivable from parent..........................   (5,868)    9,318     7,185     6,480    (12,098)
      Inventories.....................................   (3,009)   (4,693)   (6,054)   (2,897)     1,023
      Deferred tax asset..............................    1,259    (2,046)     (495)     (222)      (709)
      Prepaid expenses and other current assets.......      509    (1,145)   (1,090)       80      1,064
      Other assets....................................      (16)   (1,946)    1,605       120        124
      Accounts payable................................     (201)    1,922     5,117        47       (256)
      Accrued liabilities.............................   (3,685)    1,438         9      (304)     2,147
      Deferred tax liability..........................       --       407      (132)     (114)        --
                                                        -------   -------   -------   -------   --------
Net cash provided by (used in) operating activities...   (8,282)    3,982     7,633     2,994      3,519
                                                        -------   -------   -------   -------   --------
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment...................   (3,495)   (6,238)   (3,305)   (1,095)    (1,641)
Acquisition of assets.................................   (4,972)       --        --        --         --
                                                        -------   -------   -------   -------   --------
Net cash used in investing activities.................   (8,467)   (6,238)   (3,305)   (1,095)    (1,641)
                                                        -------   -------   -------   -------   --------
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment of obligations under capital leases...........     (879)   (1,054)   (1,522)     (261)      (706)
Proceeds received from issuance of debt to parent
  company.............................................    1,900        --        --        --         --
Stock exchanged for net assets contributed and
  proceeds from sale of common stock..................   15,258         2     1,980        14        713
                                                        -------   -------   -------   -------   --------
Net cash provided by (used in) financing activities...   16,279    (1,052)      458      (247)         7
                                                        -------   -------   -------   -------   --------
Net increase (decrease) in cash and cash
  equivalents.........................................     (470)   (3,308)    4,786     1,652      1,885
Cash and cash equivalents, beginning of period........    5,889     5,419     2,111     2,111      6,897
                                                        -------   -------   -------   -------   --------
Cash and cash equivalents, end of period..............  $ 5,419   $ 2,111   $ 6,897   $ 3,763   $  8,782
                                                        =======   =======   =======   =======   ========
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest incurred, expensed and paid..................  $   119   $   309   $ 1,113   $   239   $    144
Income taxes received from (paid to) parent...........       --      (202)    4,302        --        942
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND
  FINANCING ACTIVITIES:
Capital lease obligations incurred....................  $   826   $ 2,323   $ 1,944   $   391   $    852
Transfer of inventory to fixed assets.................       --        --     1,357       119        150
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                       F-6
<PAGE>   91

                               McDATA CORPORATION

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1 -- OVERVIEW AND BASIS OF PRESENTATION

     On October 1, 1997 EMC Corporation (EMC or the Parent) formed McDATA
Corporation (McDATA or the Company) which is incorporated in Delaware. The
Company was formed when McDATA Holdings Corporation, a wholly-owned subsidiary
of EMC, transferred cash and net assets to McDATA pursuant to an Asset Transfer
Agreement. In exchange, EMC received 81,000,000 shares of the Company's Class A
common stock. Concurrently, with the Asset Transfer Agreement, minority
shareholders contributed $10,000,000 in cash in exchange for 10,000,000 shares
of the Company's Class B common stock. As a result of these transactions, EMC
owned 89% of the Company and the minority shareholders owned 11% of the Company.
As McDATA was under the control of EMC, there was no change in the accounting
basis of the Company's assets and liabilities in the consolidated financial
statements.

     McDATA was formed to continue the design, development, manufacturing and
selling of EMC's fibre channel switching devices that enable enterprise-wide
high performance storage area networks. The Company continues to provide
services for EMC's ESCON switch business under a service agreement with EMC.

     The consolidated financial statements include the assets, liabilities,
operating results and cash flows of McDATA and have been prepared using EMC's
historical bases in the assets and liabilities and the historical results of
operations of McDATA. The Company has operated substantially as a separate
entity and, accordingly, the consolidated financial statements do not include
any allocations for corporate expenses incurred by EMC. The consolidated
financial statements do include certain allocations of interest income and
expense from participation in EMC's cash management system (see Note 11).

NOTE 2 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

  Principles of Consolidation

     The consolidated financial statements include the assets, liabilities,
results of operations, cash flows and changes in stockholders' equity of the
Company and its wholly-owned subsidiaries. All material intercompany
transactions and balances have been eliminated.

  Unaudited Interim Financial Data

     The unaudited interim consolidated financial statements as of March 31,
2000 and for the three months ended March 31, 1999 and 2000 have been prepared
on the same basis as the audited financial statements and, in the opinion of
management, reflect all normal recurring adjustments necessary to present fairly
the financial information set forth therein, in accordance with generally
accepted accounting principles. The results of operations for the interim
periods are not necessarily indicative of the results to be expected for future
periods.

  Use of Estimates

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that effect the reported amounts of assets, liabilities, revenues
and expenses and disclosure of contingent assets and liabilities. Actual results
could differ from these estimates.

                                       F-7
<PAGE>   92
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

  Revenue Recognition

     The Company generally recognizes revenue from product sales upon shipment
provided that (a) evidence of an arrangement exists (b) delivery has occurred
(c) the price to the customer is fixed and determinable and (d) collectibility
is assured. The Company accrues for warranty costs at the time of shipment based
on its experience. In transactions that include multiple products and/or
services, the Company allocates the sales value among each of the deliverables
based on their relative fair values. Revenue from the service agreement with EMC
(see Note 11) is recorded as earned pursuant to the terms of the servicing
contract.

  Concentration of Credit Risk

     The Company performs ongoing evaluations of its customers' financial
condition and, generally, requires no collateral from its customers. The
Company's customers include its Parent, as well as original equipment
manufacturers, distributors, systems integrators and end users. The majority of
the Company's customers operate in the computer industry.

     The Company had the following customers which accounted for greater than
10% of each respective period's revenue:

<TABLE>
<CAPTION>
                                                              YEARS ENDED DECEMBER 31,
                                                              -------------------------
                                                              1997      1998      1999
                                                              -----     -----     -----
<S>                                                           <C>       <C>       <C>
Customer A (Parent).........................................   88%       86%       69%
Customer B..................................................   --        --        13%
Customer C..................................................   --        --        11%
</TABLE>

     At December 31, 1999, these customers accounted for 26%, 31% and 18%,
respectively, of the Company's gross accounts receivable, which is comprised of
accounts receivable and receivable from Parent. At December 31, 1998, Customer A
accounted for 80% of the Company's gross accounts receivable.

     Financial instruments which potentially subject the Company to
concentrations of credit risk are accounts receivable and cash equivalents. The
Company has a cash investment policy which generally restricts investments to
ensure preservation of principal and maintenance of liquidity.

  Cash Equivalents

     Cash equivalents are short-term, highly liquid investments that are readily
convertible to cash and have remaining maturities of three months or less.

  Fair Value of Financial Instruments

     The carrying value of financial instruments, including cash equivalents,
gross accounts receivable, accounts payable and accrued liabilities, approximate
fair value due to their short maturities. Based upon borrowing rates currently
available to the Company, with similar terms, the carrying value of debt and
capital lease obligations approximate their fair value.

  Impairment of Long-Lived Assets

     The Company periodically evaluates the carrying value of long-lived assets
when events and circumstances warrant such a review. The carrying value of a
long-lived asset is considered impaired when the anticipated undiscounted cash
flows from such asset is separately identifiable and is less

                                       F-8
<PAGE>   93
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

than its carrying value. In that event, a loss is recognized to the extent that
the carrying value exceeds the fair value of the long-lived asset. Fair value is
determined primarily using the anticipated cash flows discounted at a rate
commensurate with the risk involved.

  Earnings and Loss Per Share

     Basic net income or loss per share is computed using the weighted average
number of common shares outstanding during the period. Diluted net income per
share is computed using the weighted average number of common and dilutive
common equivalent shares outstanding during the period. Dilutive common
equivalent shares consist of stock options. Prior to October 1, 1997, the
Company's capital structure was not indicative of the current structure. As
such, earnings per share for 1997 has been calculated using the actual number of
shares distributed on October 1, 1997.

     Potentially dilutive securities totaling 8,799,000, 11,262,750 and
11,940,514 for the years ended December 31, 1997, 1998 and 1999, respectively,
were excluded from historical diluted loss per common share because of their
anti-dilutive effect.

     Following is a reconciliation between basic and diluted earnings per share
for the period ended March 31, 2000 (unaudited) (in thousands except per share
information):

<TABLE>
<CAPTION>
                                                            PERIOD ENDED MARCH 31, 2000
                                                           -----------------------------
                                                                                   PER
                                                                                  SHARE
                                                           INCOME      SHARES     AMOUNT
                                                           -------    --------    ------
<S>                                                        <C>        <C>         <C>
Net income -- basic EPS..................................  $5,312      93,084     $0.06
Effect of stock options..................................               6,019
                                                                      -------
Net income -- diluted EPS................................              99,103     $0.05
                                                                      =======
</TABLE>

  Stock-Based Compensation

     The Company accounts for grants of stock options and common stock purchase
rights according to Accounting Principles Board Opinion No. 25, Accounting for
Stock Issues to Employees (APB 25), and related interpretations. Any deferred
stock compensation calculated pursuant to APB 25 is amortized ratably over the
vesting period of the individual options, generally four years.

  Advertising

     The Company expenses advertising costs as incurred. Advertising expenses
for the periods ended December 31, 1997, 1998 and 1999 were approximately
$439,000, $696,000 and $531,000, respectively.

  Research and Development

     Research and development costs are expensed as incurred.

  Software Development Costs

     In accordance with Statement of Financial Accounting Standards No. 86,
Accounting for the Costs of Computer Software to be Sold, Leased, or Otherwise
Marketed, the Company capitalizes eligible computer software development costs
upon the establishment of technological feasibility, which it has defined as
completion of designing, coding and testing activities. For the years ended

                                       F-9
<PAGE>   94
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

December 31, 1997, 1998 and 1999, the amount of costs eligible for
capitalization, after consideration of factors such as realizable value, were
not material and, accordingly, all software development costs have been charged
to research and development expenses in the consolidated statements of
operations.

  Internal-Use Software Development Costs

     The Company accounts for its development and implementation of internal-use
software according to Statement of Position No. 98-1, Accounting for the Cost of
Computer Software Developed or Obtained for Internal Use. This statement
provides guidance regarding the conditions under which the costs of internal-use
software should be capitalized. Costs of developing and implementing software
for internal use, which meet certain criteria, were capitalized and are being
amortized over a five-year period. The Company capitalized approximately
$1,913,000 and $401,000 during 1998 and 1999, respectively, of which
approximately $0 and $424,000 was amortized to expense, respectively.

  Comprehensive Income

     Effective January 1, 1998, the Company adopted the provisions of Statement
of Financial Accounting Standards No. 130, Reporting Comprehensive Income. This
statement established standards for reporting comprehensive income and its
components in financial statements. Comprehensive income includes all changes in
equity during a period from non-owner sources. During each of the three years
ended December 31, 1999 and the three-month periods ended March 31, 1999 and
2000, the Company did not have any significant transactions that were required
to be reported as adjustments to determine comprehensive income.

  Reclassifications

     Certain prior year amounts have been reclassified to conform with the 1999
presentation.

  Recent Accounting Pronouncement

     In December 1999, the Securities and Exchange Commission issued Staff
Accounting Bulletin No. 101, Revenue Recognition in Financial Statements, as
amended. SAB 101 summarizes certain of the Securities and Exchange Commission's
views in applying generally accepted accounting principles to revenue
recognition in financial statements. The Company has applied the provisions of
SAB 101 in the consolidated financial statements. The adoption of SAB 101 did
not have a material impact on the Company's financial condition or results of
operations.

NOTE 3 -- INVENTORIES

     Inventories, which include material, labor and factory overhead, are stated
at the lower of cost (first-in, first-out method) or market. The Company
evaluates the need for reserves associated with

                                      F-10
<PAGE>   95
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

obsolete, slow-moving and nonsalable inventory by reviewing net realizable
values on a quarterly basis. The components of inventory were as follows (in
thousands):

<TABLE>
<CAPTION>
                                                       DECEMBER 31,
                                                     ----------------    MARCH 31,
                                                      1998      1999       2000
                                                     ------    ------    ---------
<S>                                                  <C>       <C>       <C>
Raw materials......................................  $4,086    $6,450     $4,378
Work-in-progress...................................     231     1,081      1,198
Finished goods.....................................     817     1,485      2,545
                                                     ------    ------     ------
                                                      5,134     9,016      8,121
Less reserves......................................    (640)   (2,064)    (2,644)
                                                     ------    ------     ------
                                                     $4,494    $6,952     $5,477
                                                     ======    ======     ======
</TABLE>

NOTE 4 -- PROPERTY AND EQUIPMENT

     Property and equipment is stated at cost. For financial reporting purposes,
depreciation is recorded principally on a straight-line method over the
estimated useful lives of the asset as follows:

<TABLE>
<S>                                       <C>
Equipment and furniture...............    3-5 years
Computer software.....................    3-5 years
Capital lease equipment...............    The shorter of the useful life of 3-5
                                          years or lease term
Leasehold improvements................    The shorter of the useful life of 3-5
                                          years or lease term
</TABLE>

     Accelerated depreciation methods are generally used for income tax
purposes. Expenditures that substantially extend the useful life of an asset are
capitalized. Ordinary repair and maintenance expenditures are expensed as
incurred.

     Property and equipment consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                         DECEMBER 31,
                                                      ------------------
                                                       1998       1999
                                                      -------    -------
<S>                                                   <C>        <C>
Equipment and furniture.............................  $19,947    $24,290
Computer software...................................    4,760      5,992
Leasehold improvements..............................    1,244      1,748
                                                      -------    -------
                                                       25,951     32,030
Less accumulated depreciation and amortization......  (13,831)   (18,230)
                                                      -------    -------
                                                      $12,120    $13,800
                                                      =======    =======
</TABLE>

     Equipment and furniture at December 31, 1998 and 1999 includes assets under
capitalized leases of $4,314,000 and $5,896,000, respectively, with related
accumulated amortization of $1,882,000 and $3,168,000, respectively.

                                      F-11
<PAGE>   96
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The minimum future lease payments under capital leases as of December 31,
1999 are as follows (in thousands):

<TABLE>
<S>                                                       <C>
2000....................................................  $1,752
2001....................................................   1,062
2002....................................................     205
2003....................................................      --
2004....................................................      --
                                                          ------
                                                           3,019
Less amount representing interest.......................    (258)
                                                          ------
Present value of minimum lease payments (including
  $1,586 classified as current).........................  $2,761
                                                          ======
</TABLE>

NOTE 5 -- PREPAID EXPENSES AND OTHER ASSETS

     Prepaid expenses and other assets consisted of the following (in
thousands):

<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                        ----------------
                                                         1998      1999
                                                        ------    ------
<S>                                                     <C>       <C>
Prepaid technology license fees.......................  $1,336    $1,702
Other.................................................     689     1,413
                                                        ------    ------
                                                        $2,025    $3,115
                                                        ======    ======
</TABLE>

     Prepaid technology license fees are amortized over the shorter of
consumption per unit or estimated period to be benefited.

     Other assets consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                        ----------------
                                                         1998      1999
                                                        ------    ------
<S>                                                     <C>       <C>
Intangible assets and goodwill........................  $2,636    $2,408
Prepaid technology license fees (non-current
  portion)............................................   1,811        --
Other.................................................     278       485
                                                        ------    ------
                                                         4,725     2,893
Less accumulated amortization.........................  (1,305)   (1,432)
                                                        ------    ------
                                                        $3,420    $1,461
                                                        ======    ======
</TABLE>

     On March 20, 1997, the Company purchased certain assets and assumed certain
liabilities of Hewlett-Packard Canada Ltd. The purchase price was $4,970,000 and
was allocated to the net assets acquired based on their estimated fair market
value and the excess purchase price was allocated to identifiable intangible
assets and goodwill that are being amortized over five years.

                                      F-12
<PAGE>   97
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

NOTE 6 -- ACCRUED LIABILITIES

     Accrued liabilities consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                        ----------------
                                                         1998      1999
                                                        ------    ------
<S>                                                     <C>       <C>
Wages and employee benefits...........................  $1,269    $2,104
Warranty reserves.....................................   1,485       986
Other taxes...........................................     772       612
Technology purchase obligation........................   1,000        --
Other accrued liabilities.............................     316     1,149
                                                        ------    ------
                                                        $4,842    $4,851
                                                        ======    ======
</TABLE>

NOTE 7 -- NOTE PAYABLE TO PARENT COMPANY

     On October 1, 1997, the Company entered into an unsecured term note with
the Parent in the amount of $1,900,000. The note requires quarterly payments of
interest in arrears, with principle to be paid in 2007 or upon the consummation
of a sale of all or part of the Company, including an initial public offering.
As the Company anticipates consummating its initial public offering in 2000, the
note has been classified as a current liability as of December 31, 1999. The
note bears simple interest at the prime rate as published in the Wall Street
Journal (8.5% at December 31, 1999). Interest expense incurred and paid to the
Parent for the periods ended December 31, 1997, 1998 and 1999 totaled $63,000,
$161,000 and $154,000, respectively.

NOTE 8 -- STOCKHOLDERS' EQUITY

     The Company has both Class A and Class B common stock. Holders of Class A
and Class B common stock have voting rights equal to one vote and one-tenth
vote, respectively, for each share held. Holders of Class A and Class B common
stock share equal rights as to dividends. No dividends attributable to common
stock were declared or paid during the years ended December 31, 1997, 1998 or
1999.

NOTE 9 -- EMPLOYEE BENEFIT PLANS AND STOCK OPTIONS

  Defined Contribution Plan

     The Company has a defined contribution plan that covers eligible employees.
Effective January 1, 1998, the Board of Directors authorized the Company to
prospectively provide a matching contribution to the McDATA Retirement Savings
Plan at a rate of 50% of an employee's contribution up to 6% of the employee's
compensation. Such Company contributions are made in cash, and amounted to
$393,000 and $550,000 in 1998 and 1999, respectively.

  Profit Sharing Plan

     Effective October 1, 1997, the Board of Directors authorized a profit
sharing plan whereby the Company contributes a portion of each year's profits to
a profit sharing pool. The profit sharing amount is determined annually by the
Board of Directors and is distributed to employees 50% in cash and 50% in the
employees' behalf as contributions to the McDATA Retirement Savings Plan.

                                      F-13
<PAGE>   98
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Expense recognized under the profit sharing plan during the period ended
December 31, 1997 approximated $988,000. No expense was recognized in 1998 or
1999 as no Company contributions were approved by the Board of Directors.

  Stock Option Plan

     The 1997 Stock Option Plan (the Plan), adopted on October 1, 1997, provides
for the grant of either incentive or nonstatutory options to employees for the
purchase of Class B common stock. The Company has reserved 19,000,000 shares for
issuance under the Plan. Options under the Plan become exercisable over a
four-year period with one-fourth exercisable on each annual anniversary of grant
date and expire ten years from the date of grant. All options are granted at an
exercise price equal to the fair value of the common stock at the date of grant
as determined by the Company's Board of Directors.

     The following summarizes option transactions for the period from December
31, 1996 to March 31, 2000:

<TABLE>
<CAPTION>
                                                         WEIGHTED-                   WEIGHTED-
                                             SHARES       AVERAGE                     AVERAGE
                                            COVERED      EXERCISE       OPTIONS      EXERCISE
                                           BY OPTIONS      PRICE      EXERCISABLE      PRICE
                                           ----------    ---------    -----------    ---------
<S>                                        <C>           <C>          <C>            <C>
Outstanding at December 31, 1996.........          --     $   --              --       $  --
Granted..................................   8,883,000       1.00
Forfeited or expired.....................     (84,000)      1.00
                                           ----------
Outstanding at December 31, 1997.........   8,799,000       1.00              --          --
Granted..................................   2,725,600       1.06
Exercised................................      (2,000)      1.00
Forfeited or expired.....................    (259,850)      1.00
                                           ----------
Outstanding at December 31, 1998.........  11,262,750       1.02       2,173,938        1.00
Granted..................................   3,646,700       2.29
Exercised................................  (1,978,936)      1.00
Forfeited or expired.....................    (990,000)      1.10
                                           ----------
Outstanding at December 31, 1999.........  11,940,514       1.40       2,584,690        1.02
Granted (unaudited)......................   1,331,450      11.54
Exercised (unaudited)....................    (700,250)      1.02
Forfeited or expired (unaudited).........    (108,750)      1.32
                                           ----------
Outstanding at March 31, 2000
  (unaudited)............................  12,462,964     $ 2.51       2,358,876       $1.07
                                           ==========
</TABLE>

     At December 31, 1999 and March 31, 2000, there were 5,078,550 and 3,855,850
(unaudited) options available for grant under the Plan, respectively.

                                      F-14
<PAGE>   99
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The status of total stock options outstanding and exercisable at December
31, 1999 was as follows:

<TABLE>
<CAPTION>
                       OPTIONS OUTSTANDING
               -----------------------------------   OPTIONS EXERCISABLE
                             WEIGHTED                --------------------
                              AVERAGE     WEIGHTED               WEIGHTED
                             REMAINING    AVERAGE                AVERAGE
EXERCISE         NUMBER     CONTRACTUAL   EXERCISE    NUMBER     EXERCISE
PRICES         OF SHARES       LIFE        PRICE     OF SHARES    PRICE
--------       ----------   -----------   --------   ---------   --------
<S>            <C>          <C>           <C>        <C>         <C>
$1.00           7,504,376    7.8 years     $1.00     2,373,626    $1.00
$1.13 - 1.25      856,438    8.7 years     $1.17       211,064    $1.17
$1.63             927,000    9.1 years     $1.63            --       --
$2.00             375,250    9.3 years     $2.00            --       --
$2.50 - 2.75    2,277,450    9.7 years     $2.61            --       --
               ----------                            ---------
$1.00 - 2.75   11,940,514    8.4 years     $1.40     2,584,690    $1.02
               ==========                            =========
</TABLE>

     The status of total stock options outstanding and exercisable at March 31,
2000 was as follows (unaudited):

<TABLE>
<CAPTION>
                        OPTIONS OUTSTANDING
                -----------------------------------   OPTIONS EXERCISABLE
                              WEIGHTED                --------------------
                               AVERAGE     WEIGHTED               WEIGHTED
                              REMAINING    AVERAGE                AVERAGE
EXERCISE          NUMBER     CONTRACTUAL   EXERCISE    NUMBER     EXERCISE
PRICE           OF SHARES       LIFE        PRICE     OF SHARES    PRICE
--------        ----------   -----------   --------   ---------   --------
<S>             <C>          <C>           <C>        <C>         <C>
$1.00            6,801,376    7.6 years     $ 1.00    1,960,126    $1.00
$1.13 - 1.25       794,188    8.4 years     $ 1.17      185,938    $1.17
$1.63              906,750    8.8 years     $ 1.63      212,812    $1.63
$2.00              355,250    9.1 years     $ 2.00           --       --
$2.50 - 2.75     2,273,950    9.4 years     $ 2.61           --       --
$11.54           1,331,450   10.0 years     $11.54           --       --
                ----------                            ---------
$1.00 - 11.54   12,462,964    8.4 years     $ 2.51    2,358,876    $1.07
                ==========                            =========
</TABLE>

     The Company applies APB 25 and related interpretations in accounting for
its stock-based compensation plan. During the year ended December 31, 1999 and
the three months ended March 31, 2000, in connection with the grant of certain
stock options to employees, the Company recorded deferred stock-based
compensation of $19,804,000 and $73,000 (unaudited), respectively, representing
the difference between the exercise price and the deemed fair market value of
the Company's common stock on the dates these stock options were granted.
Deferred compensation is included as a reduction of stockholders' equity and is
being amortized on a straight-line basis over the vesting periods of the related
options, which is generally four years. During the year ended December 31, 1999
and the three months ended March 31, 2000, the Company recorded amortization of
$2,237,000 and $1,239,000 (unaudited), respectively.

                                      F-15
<PAGE>   100
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The Company has adopted the disclosure provisions of Statement of Financial
Accounting Standards No. 123, Accounting for Stock-Based Compensation. The pro
forma impact on the company's net loss and net loss per share as reported for
the years ended December 31 pursuant to SFAS 123 to reflect the fair value
method of accounting for stock-based compensation plans would have been as
follows (in thousands):

<TABLE>
<CAPTION>
                                                      YEARS ENDED DECEMBER 31,
                                                    -----------------------------
                                                     1997       1998       1999
                                                    -------    -------    -------
<S>                                                 <C>        <C>        <C>
Net income (loss):
  As reported.....................................  $(3,224)   $(2,468)   $(1,033)
  Pro forma.......................................  $(3,299)   $(2,823)   $(1,452)
Net income (loss) per share:
  As reported.....................................  $ (0.04)   $ (0.03)   $ (0.01)
  Pro forma.......................................  $ (0.04)   $ (0.03)   $ (0.02)
</TABLE>

     The fair value of each option is estimated as of the date of grant using
the Black Scholes valuation pricing model with the following assumptions: (i)
dividend yield of 0%; (ii) expected volatility of 0%; (iii) weighted-average
risk-free rate of 5.985% in 1997, 5.4% in 1998 and 5.5% in 1999; and (iv)
expected life of four years in 1997, 1998 and 1999. The weighted-average per
share fair value of options granted was $0.21, $0.21 and $5.94 per share during
1997, 1998 and 1999, respectively.

NOTE 10 -- INCOME TAXES

     The Company is included in a consolidated Federal and Colorado income tax
return with EMC. Pursuant to a tax sharing agreement entered into with EMC, the
Company will be compensated by EMC for the use of its United States net
operating losses at 35%, and its tax credits, including research and development
credits, utilized by the Parent. The tax sharing agreement with EMC approximates
the amount of taxes to be paid by the Company as though it had filed separate
federal, state and local income tax returns, with the exception of any tax
benefit attributable to the exercise of options to acquire shares of EMC stock.
The Company will also pay EMC for tax resulting from its United States taxable
income.

                                      F-16
<PAGE>   101
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Income tax expense (benefit) consisted of the following (in thousands):

<TABLE>
<CAPTION>
                                                       YEARS ENDED DECEMBER 31,
                                                      --------------------------
                                                       1997      1998      1999
                                                      ------    -------    -----
<S>                                                   <C>       <C>        <C>
Current:
  Federal...........................................  $  257    $(3,918)   $ 508
  State.............................................      12       (217)       7
                                                      ------    -------    -----
                                                         269     (4,135)     515
Deferred:
  Federal...........................................   1,900     (1,625)    (605)
  State.............................................     164        (14)     (22)
                                                      ------    -------    -----
                                                       2,064     (1,639)    (627)
                                                      ------    -------    -----
Total expense (benefit).............................  $2,333    $(5,774)   $(112)
                                                      ======    =======    =====
</TABLE>

     The total income tax expense (benefit) differs from the amount computed
using the federal income tax rate of 35% for the following reasons (in
thousands):

<TABLE>
<CAPTION>
                                                       YEARS ENDED DECEMBER 31,
                                                      --------------------------
                                                       1997      1998      1999
                                                      ------    -------    -----
<S>                                                   <C>       <C>        <C>
Federal income tax benefit at statutory rate........  $ (312)   $(2,885)   $(401)
Research and development credit.....................      --       (100)    (300)
State taxes, net of federal benefit.................     (12)      (107)     (15)
Change in valuation allowance.......................   2,650     (2,650)      --
Stock-based compensation............................      --         --      613
Other...............................................       7        (32)      (9)
                                                      ------    -------    -----
Income tax expense (benefit)........................  $2,333    $(5,774)   $(112)
                                                      ======    =======    =====
</TABLE>

     Deferred income taxes reflect the tax effect of temporary differences
between the amount of assets and liabilities for financial reporting purposes
and income tax purposes. The tax effects of each

                                      F-17
<PAGE>   102
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

type of temporary difference that give rise to a significant portion of the
deferred tax assets are as follows (in thousands):

<TABLE>
<CAPTION>
                                                          DECEMBER 31,
                                                        ----------------
                                                         1998      1999
                                                        ------    ------
<S>                                                     <C>       <C>
Deferred tax asset:
  Inventory reserves and costs........................  $1,126    $1,329
  Warranty reserves...................................     539       358
  Reserves related to employee benefits...............     354       597
  Stock-based compensation............................      27       199
  Other...............................................      --        58
                                                        ------    ------
                                                         2,046     2,541
Deferred tax (liability):
  Difference between book and tax depreciation........    (407)     (275)
Net deferred income tax asset.........................  $1,639    $2,266
                                                        ======    ======
</TABLE>

     The Internal Revenue Service (IRS) has begun its examination of the EMC
consolidated Federal income tax return for the periods ended December 31, 1996,
1997 and 1998.

     The Company evaluates a variety of factors in determining the amount of the
deferred income tax assets to be recognized pursuant to SFAS No. 109, including
the number of years the Company's operating loss and tax credits can be carried
forward, the existence of taxable temporary differences, the Company's earnings
history, the Company's near-term earnings expectations and the existence of any
tax sharing agreements. At December 31, 1997 the Company had recorded a
valuation allowance for the full amount of the deferred tax assets because it
was more likely than not that such benefits would not be realized based upon the
Company's recent loss and short operating history. At December 31, 1998, the
Company determined that a valuation allowance was no longer required based on
its tax sharing agreement with EMC.

     Changes in the ownership of the Company may affect the ability of the
Company to be included in EMC's consolidated Federal and State income tax
returns. Such changes in ownership could also affect the tax sharing agreement
and thus the realizability of the deferred tax assets.

NOTE 11 -- TRANSACTIONS WITH PARENT

     McDATA, as EMC's majority-owned subsidiary, has engaged in several
related-party transactions with EMC and its subsidiaries. These included
benefiting from a service agreement to provide services for the Parent's ESCON
switch business, making direct sales of fibre channel products to the Parent,
participating in the Parent's cash management system and filing as a member of
the Parent's consolidated tax return (see Note 10). The terms of these
arrangements, which were negotiated in the context of a parent-subsidiary
relationship, may be more or less favorable to us than if they had been
negotiated with unaffiliated third parties.

     Under the terms of the service agreement with the Parent, the Company
provides management, manufacturing, research, development, sales, support and
administrative services with respect to specified customers of the Parent. The
amount of such service fee is subject to annual revision based on the review and
concurrence of both parties. Such service fee revenue totaled $27,652,000,

                                      F-18
<PAGE>   103
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

$25,674,000 and $17,337,000 for the years ended December 31, 1997, 1998 and
1999, respectively. Additionally, the Company provided $349,000 of consulting
services to the Parent for the year ended December 31, 1999. No such services
were provided to the Parent in 1997 or 1998.

     The Company sells fibre channel products to the Parent. Such sales
comprised 4%, 15% and 51% of Company revenue for the years ended December 31,
1997, 1998 and 1999, respectively.

     The Company participates in EMC's cash management program, in which it
deposits excess operating funds with EMC for short-term investment when funds in
excess of operating requirements are available or borrows funds from EMC during
periods of cash needs. Such funds are repaid on demand and earn simple interest,
calculated monthly (5.6% at December 31, 1999). Interest income (expense)
includes $68,000, $312,000 and $(740,000) earned (paid) from participation in
EMC's cash management program for the years ended December 31, 1997, 1998 and
1999, respectively.

NOTE 12 -- COMMITMENTS AND CONTINGENCIES

  Operating Leases

     The Company had various operating leases in effect at December 31, 1999, or
which were entered into shortly after year-end, for certain buildings, office
space and machinery and equipment. Future minimum lease payments under
non-cancelable operating leases with terms of one year or more are as follows at
December 31, 1999 (in thousands):

<TABLE>
<S>                                                       <C>
2000....................................................  $2,573
2001....................................................   2,635
2002....................................................   2,675
2003....................................................   1,905
2004 and thereafter.....................................       9
                                                          ------
                                                          $9,797
                                                          ======
</TABLE>

     Rent expense the years ended December 31, 1997, 1998 and 1999 totaled
approximately $1,540,000, $2,115,000 and $2,218,000, respectively.

     The Company has various commitments for sales, purchases and employee
benefit plans in the ordinary course of business. In the aggregate, such
commitments do not differ significantly from current market prices or
anticipated usage requirements.

  Contingencies

     From time to time, the Company is subject to claims arising in the ordinary
course of business. In the opinion of management, no such matter, individually
or in the aggregate, exists which is expected to have a material effect on the
results of operations, financial position or cash flows of the Company.

NOTE 13 -- SEGMENT INFORMATION

     The Company has one reporting segment relating to the manufacturing and
marketing of computer-based hardware systems. The Company's operations are
conducted in the United States and in certain foreign countries, none of which
are individually significant to the Company's overall operations. The Company
has not incurred any foreign currency translation adjustments as all of its

                                      F-19
<PAGE>   104
                               McDATA CORPORATION

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

sales are settled in U.S. dollars. In addition, all of its subsidiaries' books
are maintained in U.S. dollars.

     Certain information related to the Company's operations by geographic area
is presented below (in thousands). Long-lived assets include property and
equipment and other non-current assets.

<TABLE>
<CAPTION>
                                                       NET      LONG-LIVED
                                                      SALES       ASSETS
                                                     -------    ----------
<S>                                                  <C>        <C>
1997
United States......................................  $30,547     $ 5,404
Foreign countries..................................    2,476       3,280
                                                     -------     -------
          Total....................................  $33,023     $ 8,684
                                                     =======     =======
1998
United States......................................  $34,463     $13,126
Foreign countries..................................    2,085       2,414
                                                     -------     -------
          Total....................................  $36,548     $15,540
                                                     =======     =======
1999
United States......................................  $80,055     $13,755
Foreign countries..................................   15,208       1,506
                                                     -------     -------
          Total....................................  $95,263     $15,261
                                                     =======     =======
</TABLE>

NOTE 14 -- SUBSEQUENT EVENTS

     On May 23, 2000 the Board of Directors approved a 2 for 1 stock split of
the Company's Class A and B common stock. All share and per share amounts have
been adjusted for all periods presented to give retroactive effect to this stock
split. The Board of Directors also authorized, after giving effect to the stock
split, an increase in the authorized shares of the Company's Class A common
stock to 250,000,000 shares and an increase in the Class B common stock to
200,000,000 shares. In addition, the Board of Directors authorized 25,000,000
shares of undesignated preferred stock. All of these transactions will be
effected prior to the closing of the Company's initial public offering.

                                      F-20
<PAGE>   105

                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The expenses, other than underwriting discounts and commissions, expected
to be incurred by us in connection with the issuance and distribution of the
securities being registered under this registration statement are estimated to
be as follows:

<TABLE>
<S>                                                             <C>
Securities and Exchange Commission registration fee.........    $
NASD filing fees............................................
The Nasdaq National Market listing fee......................
Printing and engraving expenses.............................
Legal fees and expenses.....................................
Accounting fees and expenses................................
Blue Sky fees and expenses (including legal fees)...........            *
Registrar and Transfer agent fees...........................            *
Miscellaneous...............................................            *
                                                                --------
  Total.....................................................    $       *
                                                                ========
</TABLE>

-------------------------
* To be filed by Amendment.

ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Section 145 of the Delaware General Corporate Law permits indemnification
of officers, directors and other corporate agents under certain circumstances
and subject to certain limitations. Our amended and restated certificate of
incorporation and our amended and restated by-laws, provide that we shall
indemnify our directors and officers to the fullest extent authorized or
permitted by law.

     Our amended and restated certificate of incorporation further provides that
our directors will not be personally liable to us or any stockholder for
monetary damages for breach of fiduciary duty, except to the extent such
exemption is not permitted by law. Section 102 of the Delaware General Corporate
Law provides that officers and directors will not be personally liable for
monetary damages for breach of their fiduciary duties as directors, except
liability for:

     - any breach of their duty of loyalty to the corporation or its
       stockholders;

     - acts or omissions not in good faith or which involve intentional
       misconduct or a knowing violation of law; or

     - unlawful payments of dividends or unlawful stock repurchases or
       redemption.

     This provision has no effect on any non-monetary remedies that may be
available to us or our stockholders, nor does it relieve us or our officers or
directors from compliance with federal or state securities laws.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers or persons controlling us
pursuant to the foregoing provisions or otherwise, we have been informed that in
the opinion of the Securities and Exchange Commission, such indemnification is
against public policy as expressed in the Securities Act of 1933 and is
therefore unenforceable.

     Our amended and restated by-laws also permit us to purchase and maintain
insurance on behalf of any officer or director for any liability arising out of
his or her actions in such capacity, regardless

                                      II-1
<PAGE>   106

of whether our by-laws would otherwise permit indemnification for that
liability. We currently have directors' and officers' liability insurance which
would indemnify our directors and officers against damages arising out of claims
which might be made against them based on their negligent acts or omissions
while acting in their capacity as officers and directors.

     The underwriting agreement provides that the underwriters are obligated,
under certain circumstances, to indemnify our directors, officers and
controlling persons against some liabilities, including liabilities under the
Securities Act of 1933. Reference is made to the form of underwriting agreement
filed as Exhibit 1.1 hereto.

ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES.

     In the three years preceding the filing of this registration statement, we
have issued the securities set forth below that were not registered under the
Securities Act of 1933. The share amounts and option exercise prices set forth
below have been adjusted to give effect to the 2-for-1 stock split of the common
stock to be effected prior to the closing of this offering.

  (a) Issuance of Capital Stock.

     On October 1, 1997, we sold 81,000,000 shares of our Class A common stock
in exchange for substantially all of the assets of McDATA Holdings Corporation
pursuant to the Asset Transfer Agreement among us, McDATA Holdings Corporation
and EMC Corporation dated as of October 1, 1997.

     On October 1, 1997, we sold 10,000,000 shares of our Class B common stock
for an aggregate purchase price of $10,000,000.

     No underwriters were involved in the foregoing sales of securities. The
sales of capital stock were made in reliance upon an exemption from registration
under the Securities Act of 1933 provided by Section 4(2) of the Securities Act,
and its related rules and regulations, regarding sales by an issuer not
involving a public offering. All of the foregoing securities are deemed
restricted securities for purposes of the Securities Act of 1933.

  (b) Grants and Exercises of Stock Options.

     From inception through April 30, 2000, we granted stock options to purchase
17,910,700 shares of our Class B common stock at exercise prices ranging from
$1.00 to $13.75 per share to employees and directors pursuant to our 1997 Stock
Option Plan.

     From inception through April 30, 2000, we issued and sold an aggregate of
2,774,810 shares of our Class B common stock to employees and directors for
aggregate consideration of $2,808,000 pursuant to exercises of options granted
under our 1997 Stock Option Plan.

     The issuance of options and the issuance of Class B common stock upon the
exercise of these options was exempt from registration under the Securities Act
of 1933 either pursuant to Rule 701 under the Securities Act of 1933, as a
transaction pursuant to a compensatory benefit plan, or pursuant to Section 4(2)
of the Securities Act of 1933, as a transaction by an issuer not involving a
public offering. All of the foregoing securities are deemed restricted
securities for purposes of the Securities Act of 1933.

                                      II-2
<PAGE>   107

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

     (a) EXHIBITS.

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                      DESCRIPTION OF DOCUMENT
-------                     -----------------------
<C>       <S>
  1.1*    Form of Underwriting Agreement
  3.1*    Amended and Restated Certificate of Incorporation of the
          Registrant, to be effective upon the closing of the offering
          made pursuant to this Registration Statement
  3.2*    Amended and Restated Bylaws of the Registrant, to be
          effective upon the closing of the offering made pursuant to
          this Registration Statement
  4.1*    Form of Registrant's Class B Common Stock Certificate
  4.2     Investors' Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation, McDATA Holdings
          Corporation and certain Investors
  4.3*    Amendment No. 1 to the Investor's Rights Agreement dated May
          23, 2000 by and among the Registrant, McDATA Holdings
          Corporation and certain Investors
  5.1*    Opinion of Paul T. Dacier, Esq.
 10.1     Asset Transfer Agreement dated as of October 1, 1997 by and
          among the Registrant, EMC Corporation, and McDATA Holdings
          Corporation
 10.2     Investors' Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation, McDATA Holdings
          Corporation and certain investors (See Exhibit 4.2)
 10.3     Amendment No. 1 to the Investors' Rights Agreement dated May
          23, 2000 by and among the Registrant, McDATA Holdings
          Corporation and certain Investors (see Exhibit 4.3)
 10.4     Services Agreement dated as of October 1, 1997 by and among
          EMC Corporation, McDATA Holdings Corporation and the
          Registrant
 10.5     Letter Agreement dated April 19, 1999 by and between the
          Registrant and McDATA Holdings Corporation
 10.6     Technology Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation and McDATA
          Holdings Corporation
 10.7*    Form of Amended and Restated Tax Sharing Agreement to be
          entered into by and among EMC Corporation, McDATA Holdings
          Corporation and the Registrant
 10.8     Form of Master Transaction Agreement to be entered into by
          and among the Registrant and EMC Corporation
 10.9     Form of Indemnification and Insurance Matters Agreement to
          be entered into by and among the Registrant and EMC
          Corporation
 10.10*   Form of Master Confidential Disclosure and License Agreement
          to be entered into by and among the Registrant and EMC
          Corporation
 10.11+   Reseller Agreement dated as of February 22, 2000 by and
          between IBM and the Registrant
10.12*+   OEM Purchase Agreement to be entered into by and between EMC
          Corporation and the Registrant
 10.13+   Manufacturing Agreement dated as of June 17, 1996 by and
          between SCI Systems, Inc. and the Registrant, Addendum
          Number 1 thereto, dated as of May 23, 1996 and Addendum
          Number 2 thereto, dated as of April 30, 1998
 10.14+   OEM and License Agreement dated as of April 27, 1999 by and
          between Brocade Communication Systems, Inc. and the
          Registrant
</TABLE>

                                      II-3
<PAGE>   108

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                      DESCRIPTION OF DOCUMENT
-------                     -----------------------
<C>       <S>
 10.15    Lease dated September 12, 1997 by and between the Registrant
          and WHLNF Real Estate Limited Partnership
 10.16    Lease dated November 2, 1999 by and between the Registrant
          and the Mills Family LLC
 10.17    Lease dated May 28, 1997 by and between the Registrant and
          1211486 Ontario Limited
 10.18    Form of Severance Agreement
 10.19*   1997 Stock Option Plan
 10.20*   Form of Stock Option Agreement for 1997 Stock Option Plan
 10.21    Description of Registrant's Management Bonus Program
 21.1     List of Subsidiaries of the Registrant
 23.1     Consent of PricewaterhouseCoopers LLP, Independent
          Accountants
 23.2     Consent of Counsel (included in Exhibit 5.1)
 24.1     Power of Attorney (included on the signature page to this
          registration statement)
 27.1     Financial Data Schedule
</TABLE>

-------------------------
* To be filed by amendment.

+ Portions of this exhibit have been omitted and filed separately with the
  Securities and Exchange Commission pending a request for confidential
  treatment.

     (b) FINANCIAL STATEMENT SCHEDULE(S).

     Schedule II -- Valuation and Qualifying Accounts.

     Schedules not listed above have been omitted because the information
required to be set forth therein is not applicable or it is shown in the
consolidated financial statements or notes thereto.

ITEM 17.  UNDERTAKINGS.

     The undersigned Registrant hereby undertakes to provide to the underwriter
at the closing specified in the underwriting agreement, certificates in the
denominations and registered in the names as required by the underwriter to
permit prompt delivery to each purchaser.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act of 1933 and will be governed by the final adjudication of such issue.

                                      II-4
<PAGE>   109

     The Registrant hereby undertakes:

          (1) That for purposes of determining any liability under the
     Securities Act of 1933, the information omitted from the form of prospectus
     filed as part of this registration statement in reliance upon Rule 430A and
     contained in a form of prospectus filed by the Registrant pursuant to Rule
     424(b)(1) or (4) or 497(h) under the Securities Act of 1933 is deemed to be
     part of this registration statement as of the time it was declared
     effective.

          (2) That for the purpose of determining any liability under the
     Securities Act of 1933, each post-effective amendment that contains a form
     of prospectus is deemed to be a new registration statement relating to the
     securities offered therein, and the offering of such securities at that
     time will be deemed to be the initial bona fide offering thereof.

                                      II-5
<PAGE>   110

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Broomfield, County of
Boulder, State of Colorado, on the 30th day of May, 2000.

                                          McDATA CORPORATION

                                          By:     /s/ JOHN F. MCDONNELL
                                            ------------------------------------
                                              John F. McDonnell
                                              President and Chief Executive
                                              Officer

                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that the persons whose signatures
appear below, constitute and appoint John F. McDonnell, President and Chief
Executive Officer, and Dee J. Perry, Chief Financial Officer and Vice President
of Finance and Administration, and each of them individually, as their true and
lawful attorneys-in-fact and agents, with full power of substitution and
resubstitution, for them in their names, places and steads, in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement and any subsequent registration statement filed
pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and to
file the same, with all exhibits thereto, and the other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
connection therewith, as fully to all intents and purposes as they might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, or their or his or her substitute
or substitutes, may lawfully do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities indicated and on the dates indicated.

<TABLE>
<CAPTION>
                     SIGNATURE                                        TITLE                         DATE
                     ---------                                        -----                         ----
<C>                                                  <S>                                        <C>
               /s/ JOHN F. MCDONNELL                 Chairman of the Board, President and       May 30, 2000
---------------------------------------------------    Chief Executive Officer (Principal
                 John F. McDonnell                     Executive Officer)

                 /s/ DEE J. PERRY                    Chief Financial Officer and Vice           May 30, 2000
---------------------------------------------------    President of Finance and
                   Dee J. Perry                        Administration (Principal Financial
                                                       and Chief Accounting Officer)

              /s/ DAVID A. DONATELLI                 Director                                   May 30, 2000
---------------------------------------------------
                David A. Donatelli

               /s/ JOHN W. GERDELMAN                 Director                                   May 30, 2000
---------------------------------------------------
                 John W. Gerdelman

              /s/ CHARLES C. JOHNSTON                Director                                   May 30, 2000
---------------------------------------------------
                Charles C. Johnston
</TABLE>

                                      II-6
<PAGE>   111

<TABLE>
<CAPTION>
                     SIGNATURE                                        TITLE                         DATE
                     ---------                                        -----                         ----
<C>                                                  <S>                                        <C>
                /s/ D. VAN SKILLING                  Director                                   May 30, 2000
---------------------------------------------------
                  D. Van Skilling

               /s/ THOMAS M. UHLMAN                  Director                                   May 30, 2000
---------------------------------------------------
                 Thomas M. Uhlman

              /s/ LAWRENCE G. WALKER                 Director                                   May 30, 2000
---------------------------------------------------
                Lawrence G. Walker
</TABLE>

                                      II-7
<PAGE>   112

       REPORT OF INDEPENDENT ACCOUNTANTS ON FINANCIAL STATEMENT SCHEDULE

To the Board of Directors
  of McDATA Corporation:

     Our audits of the consolidated financial statements referred to in our
report dated April 19, 2000 appearing in this Registration Statement on Form S-1
of McDATA Corporation also included an audit of the consolidated financial
statement schedule listed in Item 16(b) of this Registration Statement. In our
opinion, this consolidated financial statement schedule presents fairly, in all
material respects, the information set forth therein when read in conjunction
with the related consolidated financial statements.

PRICEWATERHOUSECOOPERS LLP

Broomfield, Colorado
April 19, 2000

                                       S-1
<PAGE>   113

                                                                      SCHEDULE 2

                               McDATA CORPORATION
                          FINANCIAL STATEMENT SCHEDULE

                       VALUATION AND QUALIFYING ACCOUNTS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                               COLUMN B       COLUMN C       COLUMN D      COLUMN E
                                             ------------   ------------   ------------   -----------
                                              BALANCE AT     CHARGED TO                     BALANCE
COLUMN A                                      BEGINNING      COSTS AND                      AT END
DESCRIPTION                                   OF PERIOD       EXPENSES      DEDUCTIONS     OF PERIOD
-----------                                  ------------   ------------   ------------   -----------
                                                              (THOUSANDS OF DOLLARS)
<S>                                          <C>            <C>            <C>            <C>
Year ended December 31, 1997:
Allowance for doubtful accounts............     $   42         $   12         $    6        $   48
Year ended December 31, 1998:
Allowance for doubtful accounts............     $   48         $   18         $    1        $   65
Year ended December 31, 1999:
Allowance for doubtful accounts............     $   65         $   30         $   --        $   95
</TABLE>

                                       S-2
<PAGE>   114

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                      DESCRIPTION OF DOCUMENT
-------                     -----------------------
<C>       <S>
  1.1*    Form of Underwriting Agreement
  3.1*    Amended and Restated Certificate of Incorporation of the
          Registrant, to be effective upon the closing of the offering
          made pursuant to this Registration Statement
  3.2*    Amended and Restated Bylaws of the Registrant, to be
          effective upon the closing of the offering made pursuant to
          this Registration Statement
  4.1*    Form of Registrant's Class B Common Stock Certificate
  4.2     Investors' Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation, McDATA Holdings
          Corporation and certain Investors
  4.3*    Amendment No. 1 to the Investors' Rights Agreement dated May
          23, 2000 by and among the Registrant, McDATA Holdings
          Corporation and certain Investors
  5.1*    Opinion of Paul T. Dacier, Esq.
 10.1     Asset Transfer Agreement dated as of October 1, 1997 by and
          among the Registrant, EMC Corporation, and McDATA Holdings
          Corporation
 10.2     Investors' Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation, McDATA Holdings
          Corporation and certain investors (See Exhibit 4.2)
 10.3     Amendment No. 1 to the Investors' Rights Agreement dated May
          23, 2000 by and among the Registrant, McDATA Holdings
          Corporation and certain Investors (see Exhibit 4.3)
 10.4     Services Agreement dated as of October 1, 1997 by and among
          EMC Corporation, McDATA Holdings Corporation and the
          Registrant
 10.5     Letter Agreement dated April 19, 1999 by and between the
          Registrant and McDATA Holdings Corporation
 10.6     Technology Rights Agreement dated as of October 1, 1997 by
          and among the Registrant, EMC Corporation and McDATA
          Holdings Corporation
 10.7*    Form of Amended and Restated Tax Sharing Agreement to be
          entered into by and among EMC Corporation, McDATA Holdings
          Corporation and the Registrant
 10.8     Form of Master Transaction Agreement to be entered into by
          and among the Registrant and EMC Corporation
 10.9     Form of Indemnification and Insurance Matters Agreement to
          be entered into by and among the Registrant and EMC
          Corporation
 10.10*   Form of Master Confidential Disclosure and License Agreement
          to be entered into by and among the Registrant and EMC
          Corporation
 10.11+   Reseller Agreement dated as of February 22, 2000 by and
          between IBM and the Registrant
10.12*+   OEM Purchase Agreement to be entered into by and between EMC
          Corporation and the Registrant
 10.13+   Manufacturing Agreement dated as of June 16, 1992 by and
          between SCI Systems, Inc. and the Registrant, Addendum
          Number 1 thereto, dated as of May 23, 1996 and Addendum
          Number 2 thereto, dated as of April 30, 1998
 10.14+   OEM and License Agreement dated as of April 27, 1999 by and
          between Brocade Communication Systems, Inc. and the
          Registrant
 10.15    Lease dated September 12, 1997 by and between the Registrant
          and WHLNF Real Estate Limited Partnership
 10.16    Lease dated November 2, 1999 by and between the Registrant
          and the Mills Family LLC
 10.17    Lease dated May 28, 1997 by and between the Registrant and
          1211486 Ontario Limited
</TABLE>
<PAGE>   115

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                      DESCRIPTION OF DOCUMENT
-------                     -----------------------
<C>       <S>
 10.18    Form of Severance Agreement
 10.19*   1997 Stock Option Plan
 10.20*   Form of Stock Option Agreement for 1997 Stock Option Plan
 10.21    Description of Registrant's Management Bonus Program
 21.1     List of Subsidiaries of the Registrant
 23.1     Consent of PricewaterhouseCoopers LLP, Independent
          Accountants
 23.2     Consent of Counsel (included in Exhibit 5.1)
 24.1     Power of Attorney (included on the signature page to this
          registration statement)
 27.1     Financial Data Schedule
</TABLE>

-------------------------
* To be filed by amendment.

+ Portions of this exhibit have been omitted and filed separately with the
  Securities and Exchange Commission pending a request for confidential
  treatment.


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