1

                                EMC CORPORATION
                               35 PARKWOOD DRIVE
                      HOPKINTON, MASSACHUSETTS 01748-9103

                                                                January 25, 2001

Dear EMC Stockholder:

     I am pleased to report that EMC Corporation's previously announced
distribution of shares of Class A common stock of McDATA Corporation will occur
on February 7, 2001. To effect the distribution, EMC is distributing all of its
shares of the Class A common stock of McDATA to EMC stockholders on a pro rata
basis. McDATA has filed an application to list the Class A common stock on The
Nasdaq National Market under the symbol "MCDTA". McDATA's Class B common stock
currently trades on The Nasdaq National Market under the symbol "MCDT."

     The enclosed information statement describes the distribution of shares of
McDATA's Class A common stock and contains important information about McDATA,
including:

        - the U.S. federal income tax treatment as a result of your receipt of
          shares of McDATA Corporation Class A common stock;

        - how we will determine the number of shares you will receive;

        - how fractional shares will be treated;

        - a brief description of the background and business of McDATA
          Corporation; and

        - how you can obtain additional information about these matters.

     We believe that the distribution of shares of Class A common stock of
McDATA will benefit EMC, McDATA and you, our stockholders. Thank you for your
investment in EMC.

                                          Sincerely,

                                          /s/ Michael C. Ruettgers
                                          MICHAEL C. RUETTGERS
                                          Executive Chairman of the Board of
                                          Directors
   2

                             INFORMATION STATEMENT

                                DISTRIBUTION OF
                              81,000,000 SHARES OF
                              CLASS A COMMON STOCK
                                       OF
                               MCDATA CORPORATION
                                       BY
                                EMC CORPORATION
                        TO EMC CORPORATION STOCKHOLDERS

     We are sending you this Information Statement because we are distributing
an aggregate of 81,000,000 shares of McDATA Corporation Class A common stock
held by us to the holders of our common stock on a pro rata basis. We are
effecting this distribution by distributing approximately .0368069 of a share of
McDATA Class A common stock as a dividend on each outstanding share of EMC
Corporation common stock. The dividend will be payable on February 7, 2001 to
holders of shares of EMC common stock that are issued and outstanding as of
January 24, 2001, except that certain persons who acquire shares of EMC common
stock subsequent to January 24, 2001, as described in this Information
Statement, may also be entitled to receive the dividend. Following the
distribution, all of the outstanding shares of McDATA Class A common stock will
be held by the stockholders of EMC.

     McDATA is a leading provider of high availability storage director
switching devices that enable business enterprises to connect and centrally
manage large numbers of storage and networking devices. McDATA designs,
develops, manufactures and sells switching devices that enable enterprise-wide
high performance storage area networks. In April 2000, the EMC board of
directors determined that it would be in the best interests of EMC and our
stockholders to separate McDATA from EMC. In August 2000, McDATA completed an
initial public offering of 14,375,000 shares of its Class B common stock.
Following the distribution of all of the McDATA Class A common stock, EMC will
no longer own any shares of McDATA, and McDATA will be a separate, independent,
publicly-traded company. McDATA has filed an application to list the Class A
common stock on The Nasdaq National Market under the symbol "MCDTA." McDATA
Class B common stock currently trades on The Nasdaq National Market under the
symbol "MCDT."

     No vote of EMC stockholders is required in connection with the distribution
of the shares of McDATA Class A common stock. Therefore, you are not required to
take any action. EMC stockholders will not be required to pay for the shares of
McDATA Class A common stock received by them in the distribution, or to
surrender or exchange shares of EMC common stock in order to receive McDATA
Class A common stock in the distribution, or to take any other action in
connection with the distribution. We are sending you this Information Statement,
which contains additional information about the terms of the distribution,
certain tax consequences of the distribution, McDATA and McDATA common stock,
for your information only. If you would like more information, you may refer to
the EMC Corporation website at http://www.emc.com/ir. EMC, however, does not
intend for its website to be considered part of this Information Statement.

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
REGULATORS HAVE APPROVED THE MCDATA CORPORATION CLASS A COMMON STOCK TO BE
ISSUED TO YOU PURSUANT TO THIS DISTRIBUTION OR DETERMINED IF THIS INFORMATION
STATEMENT IS ACCURATE OR ADEQUATE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE. THE DATE OF THIS INFORMATION STATEMENT IS JANUARY 25, 2001.

        THIS INFORMATION STATEMENT DOES NOT CONSTITUTE AN OFFER TO SELL
             OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES.
   3

                               TABLE OF CONTENTS



                            ITEM                              PAGE
                            ----                              ----
                                                           
INFORMATION ABOUT THE DISTRIBUTION OF SHARES OF MCDATA
  CORPORATION
     The Distribution.......................................    3
     The Number of Shares You Will Receive..................    3
     Trading Between the Record Date and the Distribution
      Date..................................................    3
     When and How You Will Receive the Shares...............    4
     U.S. Federal Income Tax Consequences...................    4
INFORMATION ABOUT MCDATA
     McDATA's Business......................................    7
     Background of the Separation of McDATA from EMC
        Corporation.........................................    8
INFORMATION ABOUT MCDATA COMMON STOCK
     McDATA Common Stock....................................    8
     Market for McDATA Common Stock.........................    9
     McDATA Transfer Agent..................................    9
WHERE YOU CAN FIND ADDITIONAL INFORMATION...................    9


                                        2
   4

                INFORMATION ABOUT THE DISTRIBUTION OF SHARES OF
                               MCDATA CORPORATION

THE DISTRIBUTION

     On December 28, 2000, the board of directors of EMC Corporation approved
the distribution of the shares of Class A common stock of McDATA Corporation
held by EMC to the holders of EMC common stock. To effect this distribution, the
EMC board of directors declared a dividend on EMC common stock consisting of
81,000,000 shares of McDATA Class A common stock owned by EMC. These shares
represent all of the shares of McDATA Corporation capital stock beneficially
owned by EMC. The dividend will be distributed after the close of the market on
February 7, 2001, in the amount of approximately .0368069 of a share of McDATA
Class A common stock for each share of EMC common stock outstanding on the
record date as described below.

     You will not be required to pay any cash or other consideration for the
shares of McDATA Class A common stock distributed to you or to surrender or
exchange your shares of EMC common stock to receive the dividend of McDATA Class
A common stock. The McDATA Class A common stock that you will receive has the
same relative rights as the McDATA Class B common stock currently outstanding,
except that each share of Class A common stock is entitled to one vote per share
and each share of Class B common stock is entitled to one-tenth of one vote per
share.

THE NUMBER OF SHARES YOU WILL RECEIVE

     For each share of EMC common stock that you own at 5:00 p.m., eastern time,
on January 24, 2001, the record date for the distribution, you will be entitled
to receive that number of shares of McDATA Class A common stock equal to the
quotient obtained by dividing (a) 81,000,000, the total number of shares of
McDATA Class A common stock to be distributed, by (b) the approximate number of
shares of EMC common stock outstanding at 5:00 p.m., eastern time, on the record
date. Thus, the following equation determines the number of shares of McDATA
Class A common stock you will receive for each share of EMC common stock you
hold:


                                     
Total number of shares of McDATA
Class A common stock to be distributed  =  81,000,000 / 2,200,674,237 = .0368069
Total number of shares of EMC common
stock outstanding as of 5:00 p.m.,
  eastern
time, on January 24, 2001, the record
  date


     Based on the approximate number of shares of EMC common stock outstanding
as of January 24, 2001, you will be entitled to receive approximately .0368069
of a share of McDATA Class A common stock for each share of EMC common stock you
owned at 5:00 p.m., eastern time, on the record date.

TRADING BETWEEN THE RECORD DATE AND THE DISTRIBUTION DATE

     Between the record date and the close of the market on February 7, 2001,
the distribution date, there will be two markets in EMC common stock, a "regular
way" market and an "ex-dividend" market. Shares that trade on the regular way
market will trade with an entitlement to shares of McDATA Class A common stock
that are distributed. Shares that trade on the ex-dividend market will trade
without an entitlement to shares of McDATA Class A common stock that are
distributed. Therefore, if you owned shares of EMC common stock at 5:00 p.m.,
eastern time, on the record date, and sell those shares on the regular way
market prior to the close of the market on February 7, 2001, the distribution
date, you will also be trading the shares of McDATA Class A common stock that
would have been distributed to you pursuant to the distribution. If you sell
those shares of EMC common stock on the ex-dividend market prior to the
distribution date, you will still receive the shares of McDATA Class A common
stock that were to be distributed to you pursuant to your ownership of the
shares of EMC common stock.

     There is not currently a public market for the McDATA Class A common stock.
McDATA's Class B common stock currently trades on The Nasdaq National Market
under the symbol "MCDT." McDATA has

                                        3
   5

filed an application to list the McDATA Class A common stock on The Nasdaq
National Market under the symbol "MCDTA."

WHEN AND HOW YOU WILL RECEIVE THE SHARES

     We will distribute the dividend after the close of the market on February
7, 2001 by releasing to The Bank of New York, N.A., the distribution agent, the
shares of McDATA Class A common stock to be distributed. The Bank of New York,
N.A. will also serve as transfer agent and registrar for the McDATA Class A
common stock. Initially you will have your ownership of McDATA Class A common
stock registered only in book-entry form. Book-entry registration refers to a
method of recording stock ownership in which no share certificates are issued to
stockholders.

     As of 5:00 p.m., eastern time, on February 7, 2001, the distribution date,
each EMC stockholder who held their shares of EMC common stock at 5:00 p.m.,
eastern time, on January 24, 2001, the record date, will be credited through
book-entry in the records of McDATA with the number of whole shares of McDATA
Class A common stock to which that EMC stockholder is entitled in the
distribution. Commencing on or shortly after the distribution date, the
distribution agent will mail to you an account statement indicating the number
of shares of McDATA Class A common stock that have been registered in book-entry
form either in your name, if you physically hold EMC stock certificates and are
the registered holder of the EMC shares represented by those certificates, or in
the "street name" of your brokerage firm, if your brokerage firm is the
registered holder of your EMC common stock. Most EMC stockholders have their EMC
stock certificates held on account by a stock brokerage firm. In such cases, the
brokerage firm is the registered holder or "street name," and the McDATA Class A
common stock being distributed will be registered in the name of the brokerage
firm in book-entry form. Your broker will then electronically credit your
account for the shares of McDATA Class A common stock that you receive in the
distribution and that are registered in the name of the brokerage firm in
book-entry form.

     Following the distribution date, you may obtain at any time without charge
a certificate representing the shares of McDATA Class A common stock registered
in your name in book-entry form by contacting The Bank of New York, N.A., the
transfer agent and registrar for the McDATA Class A common stock, at the address
and telephone number set forth on page 9 of this Information Statement. If you
have any questions concerning the mechanics of having shares of McDATA Class A
common stock registered in book-entry form or how to obtain a certificate
representing the shares of McDATA Class A common stock registered in your name
in book-entry form, we encourage you to contact The Bank of New York, N.A. by
telephone at (800) 432-0140.

     The distribution agent will not deliver any fractional shares of McDATA
Class A common stock in connection with the distribution. Instead, the
distribution agent will aggregate all fractional shares and sell them on behalf
of those holders who otherwise would be entitled to receive a fractional share.
Such holders will then receive a cash payment in an amount equal to their pro
rata share of the total net proceeds of that sale. We estimate that it should
generally take about two weeks from the distribution date for the distribution
agent to complete these mailings.

U.S. FEDERAL INCOME TAX CONSEQUENCES

     TAX-FREE STATUS OF THE DISTRIBUTION.  We have received a private letter
ruling from the Internal Revenue Service stating that our distribution of McDATA
Class A common stock to our common stockholders will be tax-free to us and to
the holders of our common stock for U.S. federal income tax purposes. This means
that for U.S. federal income tax purposes:

        - EMC common stockholders will not recognize a gain or loss by reason of
          the receipt of whole shares of McDATA Class A common stock as a result
          of the distribution; and

        - EMC will not recognize a gain or loss by reason of the distribution.

     Although private letter rulings are generally binding on the IRS, we will
not be able to rely on this ruling if any of the factual representations or
assumptions that we made to obtain this ruling are, or become,
                                        4
   6

incorrect or untrue in any material respect. We are not aware of any facts or
circumstances that would cause any of these representations or assumptions to be
incorrect or untrue in any material respect. Nevertheless, if the IRS
subsequently held our distribution to be taxable, the statements above would not
apply and both we and our stockholders could be subject to U.S. federal income
tax.

     SUBSEQUENT SALE OF STOCK.  If you sell your shares of McDATA Class A common
stock or EMC common stock after the distribution, you will recognize gain or
loss on such sale based on the difference between the proceeds you receive from
the sale and the tax basis allocated to the shares you sold as described below
under "Allocation of Tax Basis." This gain or loss will be a capital gain or
loss, assuming that you held such shares as a capital asset, and will be a
long-term or short-term gain or loss based on your holding period for such
shares as described below under "Holding Period."

     ALLOCATION OF TAX BASIS.  The tax basis in your shares of EMC common stock
immediately prior to the distribution will be allocated between your McDATA
Class A common stock and EMC common stock in proportion to their relative fair
market values on February 7, 2001, the distribution date. Following the
distribution, your aggregate tax basis in your shares of EMC common stock and
McDATA Class A common stock, including any fractional shares sold for cash as
described above, will be the same as your tax basis in your shares of EMC common
stock immediately prior to the distribution.

     To determine your tax basis in your shares of EMC common stock, you must
first determine (1) the date on which you acquired your EMC common stock, and
(2) the cost of your shares on that date. Because EMC has declared stock splits
in the past, your tax basis in any shares of EMC common stock acquired prior to
a stock split must be divided between the shares you held prior to the stock
split and the shares you received pursuant to the stock split. If you acquired
your shares of EMC common stock on more than one occasion, you will need to
allocate your tax basis separately for each group of shares of EMC common stock
you hold.

     HOLDING PERIOD.  The holding period for capital gains purposes of the
shares of McDATA Class A common stock that you receive as a result of the
distribution will include, and be the same as, the holding period for your
shares of EMC common stock with respect to which you received your distribution
of McDATA Class A common stock, provided that your shares of EMC common stock
are held as a capital asset on the distribution date.

     TREATMENT OF FRACTIONAL SHARES.  If you receive cash in lieu of a
fractional share of McDATA Class A common stock as part of the distribution,
such cash will be treated for U.S. federal income tax purposes as paid in
exchange for such fractional share of stock. You will realize a capital gain or
loss, provided that the fractional share is considered to be held as a capital
asset, measured by the difference between the cash you receive for such
fractional share and your tax basis in that fractional share as described above.
This capital gain or loss will be treated as a long-term or short-term gain or
loss based on your holding period for the EMC common stock with respect to which
you received your distribution of McDATA Class A common stock.

     EXAMPLES.  To aid you in calculating the allocation of your tax basis, we
have provided examples below, based on the fictitious Companies P and S. In the
following examples, "Company P" is the name of the parent company distributing
shares of its subsidiary, "Company S." Pursuant to Company P's distribution of
the stock it holds of Company S, each holder of Company P common stock is
entitled to receive .25 of a share of Company S common stock for every share of
Company P common stock held by such holder.

        1.  On April 20, 2000, Stockholder purchased 100 shares of Company P
            common stock at $60 per share for a total of $6,000. Stockholder's
            tax basis in her shares of Company P common stock is $6,000. After
            the distribution, Stockholder receives 25 shares of Company S common
            stock. On June 1, 2001, Stockholder sold her shares of Company P
            common stock for $75 per share and Company S common stock for $50
            per share. Stockholder's proceeds from the sales totaled $8,750.
            Stockholder's aggregate tax basis in the shares of Company P common
            stock and Company S common stock was $6,000. Therefore, Stockholder
            will be subject to long-term capital gains tax on $2,750.

        2. On April 20, 2000, Stockholder purchased 50 shares of Company P
           common stock at $60 per share for a total of $3,000. Upon the
           distribution, Stockholder was entitled to 12.5 shares of
                                        5
   7

           Company S common stock. Stockholder received 12 shares of Company S
           common stock and $20 in cash, one-half of the value of one share of
           Company S common stock. On the distribution date, the fair market
           value of Company P common stock was $70 per share and the fair market
           value of Company S common stock was $40 per share. Stockholder's
           aggregate tax basis in the shares of Company P common stock and
           Company S common stock (including the fractional share) is $3,000.
           Because each holder of Company P common stock was entitled to receive
           .25 of a share of Company S common stock in the distribution for each
           share of Company P common stock held by such holder, the relative
           fair market value of Company S common stock to Company P common stock
           on the distribution date was $10 ($40 per share multiplied by .25).
           Based on these relative fair market values, 12.5% ($10 relative fair
           market value of Company S common stock divided by $80, the sum of the
           relative fair market values of Company P common stock and Company S
           common stock) of Stockholder's aggregate tax basis in her Company P
           common stock must be allocated to her Company S common stock.
           Accordingly, Stockholder's aggregate tax basis in her Company P
           common stock would be reduced to $2,625 (87.5% of $3,000), or $52.50
           per share ($2,625 divided by 50 shares), and Stockholder's aggregate
           tax basis in her Company S common stock (including the fractional
           share) would be $375 (12.5% of $3,000), or $30 per share ($375
           divided by 12.5 shares).

           Because the receipt of cash in lieu of fractional shares results in
           the recognition of gain or loss for U.S. Federal income tax purposes,
           measured by the difference between the cash received for such
           fractional shares and the tax basis in such fractional shares,
           Stockholder will be subject to long-term capital gains tax on $5 ($20
           cash received in lieu of one-half of one share of Company S common
           stock minus $15 tax basis allocated to such fractional share).

     STATE, LOCAL AND FOREIGN TAX CONSEQUENCES.  You should consult your own tax
advisor regarding the state, local and foreign tax consequences of your receipt
of shares of McDATA Class A common stock and any payment for fractional shares.

     TAX RETURN STATEMENT.  U.S. Treasury regulations require you to attach a
detailed statement setting forth certain information regarding the distribution
to your U.S. federal income tax return for the year in which the distribution
occurs. Within a reasonable time after completion of the distribution, we will
provide you with the information necessary to comply with that requirement. You
should retain this statement so that it can be completed and attached to your
tax return.

     The summary of U.S. federal income tax consequences set forth above is for
general information purposes only and may not be applicable to EMC stockholders
who are not citizens or residents of the United States or who are otherwise
subject to special treatment under the Internal Revenue Code. All stockholders
should consult their own tax advisors as to the particular tax consequences to
them of the distribution, including the state, local and (if applicable) foreign
tax consequences.

                                        6
   8

                            INFORMATION ABOUT MCDATA

MCDATA'S BUSINESS

     EMC acquired McDATA in December 1995. In October 1997, EMC reorganized
McDATA to separate its fibre channel switching devices business from EMC. As
part of the reorganization, McDATA became a company focused on designing,
developing, manufacturing and selling fibre channel switching devices that
enable enterprise-wide, high performance storage area networks.

     McDATA is a leading provider of high availability storage director
switching devices that enable business enterprises to connect and centrally
manage large numbers of storage and networking devices. McDATA's products enable
business 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 storage area network or other
information infrastructure while allowing them to operate data-intensive
applications on the storage area network. McDATA sells its switching solutions
through leading original equipment manufacturers, such as EMC, and resellers,
such as IBM. McDATA also sells its products and services to distribution channel
partners, including solutions providers and systems integrators, who combine
McDATA's switching products with other system elements and services for
enterprise data centers. In addition, McDATA provides manufacturing and
distribution management services to EMC for proprietary mainframe protocol, or
ESCON(TM), switching solutions manufactured for, and sold exclusively to, IBM.

     McDATA currently markets its products primarily through one key original
equipment manufacturer, EMC, and one key reseller, IBM. In 1999 and 2000, EMC
accounted for approximately 69% and 71%, respectively, and IBM accounted for
approximately 11% and 14%, respectively, of McDATA's total revenue.

     McDATA's primary products include:

          - ED-5000 Enterprise Fibre Channel Director.  The ED-5000 provides
     high performance switching for mass storage clusters and client-server
     environments.

          - ES-3016 Fibre Channel Switch.  Targeted to the needs of the
     department environment, the ES-3016 provides a foundation from which
     business enterprises can build a department-sized storage area network or
     connect a growing department network into the enterprise-wide storage area
     network.

          - ES-1000 Fibre Channel Switch.  The ES-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.

          - Software Products.  McDATA's management software products, branded
     Enterprise Fabric Connectivity Manager, which are licensed separately from
     McDATA's other products, provide open-systems network management
     capabilities.

          - FabricReady Solutions.  McDATA's FabricReady solutions are comprised
     of McDATA's director switch products and other storage area network
     networking devices and form comprehensive enterprise storage connectivity
     solutions. These FabricReady Solutions offer customers a predictable and
     reliable way to deploy storage area network solutions into their production
     environments.

          - FICON Bridge.  McDATA designed and manufactures 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.

     For the year ended December 31, 2000, McDATA derived a substantial majority
of its product revenues from sales of its ED-5000 Enterprise Fibre Channel
Director sold primarily to EMC and the FICON Bridge card sold exclusively to
IBM.

     In May 2000, McDATA entered into a five-year agreement to sell its products
to EMC under which McDATA will manufacture McDATA products for EMC's internal
use or for delivery directly to EMC's end user customers. Under the terms of
this agreement, McDATA is obligated to provide varying degrees of support for
these products to EMC's end user customers. In May 2000, McDATA also entered
into a Resale
                                        7
   9

Agreement with IBM that governs IBM's purchases of McDATA's products and
appoints IBM as a non-exclusive authorized reselling agent of McDATA to resell
McDATA products and services to IBM reseller and end-user customers.

     As of January 1, 2001, McDATA had approximately 606 full-time employees.
Its principal facilities for administration, sales, marketing, customer support,
manufacturing, research and development are located in two facilities in the
greater Broomfield, Colorado area.

     McDATA maintains a website at www.mcdata.com. McDATA, however, does not
intend for its website to be considered part of this Information Statement.

BACKGROUND OF THE SEPARATION OF MCDATA FROM EMC CORPORATION

     In connection with the October 1997 reorganization of McDATA, McDATA was
re-incorporated in Delaware and became an indirect, majority-owned subsidiary of
EMC through EMC's direct, wholly-owned subsidiary, McDATA Holdings Corporation.
In connection with this reorganization, McDATA issued 81,000,000 shares of
McDATA Class A common stock to McDATA Holdings Corporation. Since October 1,
1997, McDATA has operated substantially as a separate company from EMC and
McDATA Holdings Corporation under the direction of McDATA's board of directors,
a majority of whom are unaffiliated with EMC. Effective December 29, 2000,
McDATA Holdings Corporation was merged into EMC and liquidated, and from that
time EMC has directly held all of the issued and outstanding shares of Class A
common stock of McDATA.

     In April 2000, EMC's board of directors and McDATA's board of directors
approved the initial public offering of shares of McDATA Class B common stock.
After the completion of McDATA's initial public offering in August 2000, EMC
continued to own all of McDATA's Class A common stock, which represented
approximately 74% of McDATA's common stock outstanding and approximately 97% of
the combined voting power of McDATA's common stock outstanding.

     On December 28, 2000, EMC's board of directors approved the distribution of
the 81,000,000 shares of McDATA Class A common stock owned by EMC to the holders
of EMC common stock by means of a dividend as described in this Information
Statement. After the distribution, EMC will not own any shares of McDATA common
stock, and McDATA will be a separate, independent, publicly traded company. On
January 12, 2001, EMC announced that it will distribute on February 7, 2001 all
of the shares of McDATA Class A common stock it owns to the holders of EMC
common stock as of January 24, 2001 on a pro rata basis, except that certain
persons who acquire shares of EMC common stock subsequent to January 24, 2001,
as described in this Information Statement, may also be entitled to receive the
dividend.

                     INFORMATION ABOUT MCDATA COMMON STOCK

MCDATA COMMON STOCK

     Under McDATA's Amended and Restated Certificate of Incorporation, McDATA's
authorized capital stock consists of 250,000,000 shares of Class A common stock,
$0.01 par value per share, 200,000,000 shares of Class B common stock, par value
$0.01 per share, and 25,000,000 shares of undesignated preferred stock, par
value $0.01 per share. As of January 1, 2001, there were 81,000,000 shares of
Class A common stock outstanding, 28,907,689 shares of Class B common stock
outstanding and no shares of preferred stock outstanding.

     Prior to the distribution, EMC will own all of the issued and outstanding
shares of McDATA Class A common stock. Following the distribution, all of the
issued and outstanding shares of McDATA Class A common stock will be held pro
rata by the stockholders of EMC.

     The relative rights of the holders of McDATA Class A common stock and Class
B common stock are identical in all respects except for voting rights. Holders
of McDATA Class A common stock are entitled to

                                        8
   10

one vote per share and holders of McDATA Class B common stock are entitled to
one-tenth of a vote per share on all matters to be voted on by McDATA
stockholders.

MARKET FOR MCDATA COMMON STOCK

     McDATA Class B common stock currently trades on The Nasdaq National Market
under the symbol "MCDT." A public market was established for the McDATA Class B
common stock as a result of McDATA's initial public offering in August 2000.

     There is currently no public market for the McDATA Class A common stock.
McDATA has filed an application to list the Class A common stock on The Nasdaq
National Market under the symbol "MCDTA."

     The following table sets forth, for the periods indicated, the high and low
last sale prices of McDATA Class B common stock as reported on The Nasdaq
National Market. We urge you to obtain current quotations for the McDATA Class B
common stock. Since McDATA's initial public offering in August 2000, the market
price of the McDATA Class B common stock has fluctuated widely. Consequently,
both the historical and current market price of the McDATA Class B common stock
may not be indicative of future market prices for the McDATA Class A common
stock or Class B common stock.



                         2000                             HIGH        LOW
                         ----                             ----        ---
                                                                
Third Quarter (August 9 to September 30)..............    141 3/8     68
Fourth Quarter (October 1 to December 31).............    132 1/2     39 3/8

                         2001
                         ----
                                                                

First Quarter (January 1 to January 24)...............     76 1/4     42 1/4


MCDATA TRANSFER AGENT

     The transfer agent and registrar for the McDATA Class A common stock and
Class B common stock is The Bank of New York, N.A. You may contact the transfer
agent and registrar at the address and telephone number set forth below. All
correspondence should be sent to the following address:

       The Bank of New York, N.A.
       Investor Relations 8W
       101 Barclay Street
       New York, New York 10286
            Telephone Number (800) 432-0140

                   WHERE YOU CAN FIND ADDITIONAL INFORMATION

     McDATA and EMC are each subject to the informational reporting requirements
of the Securities Exchange Act of 1934, as amended, and, accordingly, each
company files registration statements, reports, proxy statements and other
information with the SEC, including financial statements. McDATA has been
subject to the Securities Exchange Act reporting requirements for at least 90
days and is current in its reporting. If you would like more information about
McDATA, we urge you to read McDATA's reports filed with the SEC.

     You may read and copy McDATA's and EMC's reports filed with the SEC at the
public reference facilities of the SEC at 450 Fifth Street, N.W., Washington,
D.C. You may also inspect these reports at the SEC's website at
http://www.sec.gov, or you may obtain copies of these materials at prescribed
rates from the Public Reference Section of the SEC at 450 Fifth Street, N.W.,
Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further
information on the public reference rooms.

                                        9