SECURITIES AND EXCHANGE COMMISSION
                        Washington, D.C.  20579
                          

                                FORM 8-K
                             CURRENT REPORT

                  Pursuant to Section 13 or 15(d) of the
                     Securities Exchange Act of 1934

     Date of Report (Date of earliest event reported) October 25, 1995

                                EMC CORPORATION                            
             (Exact name of registrant as specified in its charter)

       MASSACHUSETTS            1-9853                   04-2680009        
     (State or other          (Commission              (IRS Employer
      jurisdiction of          File Number)          Identification No.)
      incorporation)

         171 SOUTH STREET, HOPKINTON, MASSACHUSETTS             01748-9103
      (Address of principal executive offices)                    (Zip Code)

                              (508) 435-1000                               
             Registrant's telephone number, including area code:

                                   N/A                                     
       (Former name or former address, if changed since last report)


          Item 5.   Other Events.

                    On October 25, 1995, EMC Corporation (the
          "Company") entered into an Agreement and Plan of Merger
          (the "Merger Agreement") by and among the Company, EMC
          Merger Corporation 1995, a Delaware corporation and a
          wholly owned subsidiary of EMC ("Sub"), and McDATA
          Corporation, a Delaware corporation ("McDATA").  Pursuant
          to the Merger Agreement, Sub shall merge with and into
          McDATA and McDATA shall survive such merger as a wholly
          owned subsidiary of the Company.  McDATA, a privately
          held company, specializes in high-bandwidth networking 
          solutions for large-scale computing applications.  

                    Completion of the transaction is subject to
          several conditions, including appropriate regulatory
          review and approval of McDATA's shareholders.  Subject to
          satisfaction of these and other conditions, the closing
          of the transactions contemplated by the Merger Agreement
          is expected to occur during the current quarter.  EMC and
          McDATA intend to treat the Merger as a "pooling of
          interests" for accounting and financial reporting
          purposes.

                    A copy of the October 25, 1995 press release
          announcing the Merger Agreement is attached as Exhibit
          99.1 hereto and is incorporated by reference herein.

          Item 7.   Financial Statements, Pro Forma Financial
                    Information and Exhibits.

               (c)  Exhibits.

          Exhibit No.              Description

               99.1      EMC Corporation Press Release dated
                         October 25, 1995


                                  SIGNATURES

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

                                   EMC CORPORATION

                                   By: /s/ Paul T. Dacier           
                                      Paul T. Dacier
                                      Vice President and
                                        General Counsel

          October 27, 1995



                                Exhibit Index

          Exhibit                                        Sequential
          No.       Description                          Page No.  

          99.1      EMC Corporation Press Release dated
                    October 25, 1995


                                                       EXHIBIT 99.1

          News from EMC Corporation

          FOR IMMEDIATE RELEASE                 Contact:  John Ryan
                                                          508-435-1000

                      EMC ANNOUNCES AGREEMENT TO ACQUIRE
                             MCDATA CORPORATION,
                 LEADING DATA CENTER NETWORKS SWITCH SUPPLIER

          STRATEGIC INVESTMENT IN COLORADO-BASED TECHNOLOGY LEADER
          POSITIONS EMC FOR FUTURE ROLE IN NETWORKED INFORMATION STORAGE

                    HOPKINTON, Mass. -- October 25, 1995 -- EMC
          Corporation, the world's leading independent supplier of
          intelligent storage and retrieval technology, today
          announced an agreement to acquire McDATA Corporation, a
          leader in data center network switching solutions, in a
          pooling-of-interests stock transaction valued at
          approximately $230 million.

                    The transaction includes the acquisition of
          more than $50 million in McDATA working capital, most of
          which is cash and accounts receivable.  The exact number
          of shares of EMC common stock to be issued will be
          determined at the closing.  Based on current market
          conditions, the acquisition of McDATA is expected to be
          accretive to EMC's earnings, adding 8-10 cents per share
          in 1995.  Completion of this transaction is subject to
          several conditions, including appropriate regulatory
          review and approval of McDATA's shareholders.  Subject to
          satisfaction of these conditions, the companies expect to
          complete the transaction during the current quarter.

                    EMC plans to operate McDATA as a wholly owned
          subsidiary.  Jack McDonnell, McDATA President and CEO and
          one of the company's founders, will continue in his
          present role and report to Michael C. Ruettgers, EMC
          President and CEO.

                    Based in Broomfield, Colorado, McDATA
          Corporation is a privately held company specializing in
          high-bandwidth networking solutions for large-scale
          computing applications.  Founded in 1982, McDATA has 150
          employees and expects 1995 revenues to exceed $150
          million.  Its flagship product, the ESCON Director, is a
          high-speed fiber-optic-based network switch designed to
          connect computers and peripherals within today's data
          center.  Marketed by IBM Corporation under an exclusive
          OEM agreement, the ESCON Director has enabled McDATA to
          become the leading supplier of data center network
          switching solutions.  ESCON, or Enterprise Systems
          Connection Architecture, is IBM's fiber-optic-based
          channel architecture for high-speed data communications
          between mainframe computers and associated peripheral
          devices such as storage systems.

                    "This acquisition will position EMC to play an
          even more critical role in helping customers establish
          information-centric computing strategies, as the
          processor-centric models of the past fade away," said
          Ruettgers, EMC President and CEO.  "McDATA's
          communications expertise will help position EMC at the
          center of the networked data center and open systems
          worlds.  We now have the opportunity to extend our market
          leadership in intelligent storage to the network and
          become the premier supplier of networked storage
          solutions for the entire enterprise."

                    "McDATA Corporation is a successful company
          with leading-edge technology, a strong management team,
          impressive technical talent, and significant financial
          strength," Ruettgers continued.  "We believe McDATA's
          strategy complements EMC's.  Like EMC, McDATA's most
          important technical expertise is in software.  We expect
          McDATA to accelerate our growth into new markets as well
          as provide direct, immediate benefits to our revenue and
          profitability."

                    McDATA President and CEO McDonnell said, "This
          acquisition will enable EMC to capitalize on the
          burgeoning market for data center and open systems
          network switching solutions.  McDATA's ESCON Director is
          the leading fiber-optic-based switch on the mainframe
          market today.  EMC will benefit from McDATA's expertise
          in networking.  Our core competencies, developed over the
          past 13 years, in high-bandwidth, high-speed connectivity
          can be leveraged to exploit future opportunities."

                    "Several technology trends are converging to
          drive the market for data center network switching
          solutions," McDonnell continued.  "These trends include
          the explosion in storage capacity requirements; wide
          recognition of the greater need for centralized
          management of information; increased information sharing
          and access; migration to open systems computing; demand
          for higher-speed storage and retrieval solutions; and
          changes in the nature of information.  Collectively,
          these trends point toward tremendous opportunities for
          EMC and McDATA to join together and capitalize on."

                    Ruettgers noted, "EMC has pursued a strategy in
          recent years of complementing its strong, internally
          fueled growth with selected technology acquisitions that
          leverage and extend our own technology and build upon our
          presence in important, growing markets.  This agreement
          is consistent with our strategy."

                    EMC Corporation, based in Hopkinton, Mass., is
          a world leader in enterprise-wide information storage and
          retrieval technology, designing systems for mainframe,
          midrange and open systems environments.  The company has
          offices worldwide and trades on the New York Stock
          Exchange under the symbol EMC.

                                    # # #

           ESCON and Enterprise Systems Connection Architecture are
          trademarks of IBM Corporation.