EMC Extended Lead in Worldwide External Disk Storage Systems Factory Revenue in Second Quarter, Analyst Firm Reports.

HOPKINTON, Mass. -- #1 EMC Only External Disk Storage Systems Supplier Among the Five Largest to Achieve Year-Over-Year Share Gain in Second Quarter

EMC Corporation, the world leader in information storage and management, extended its lead in worldwide factory revenue for external disk storage systems in the second quarter, according to a new report from IDC (1). The market research firm also reported that revenue from EMC's family of external disk storage systems grew faster on a year-over-year basis than external disk storage systems from any of the next four largest suppliers (Hewlett-Packard, IBM, Sun Microsystems, and Hitachi) during the first half of 2004.

Howard Elias, EMC Executive Vice President, Corporate Marketing and Office of Technology, said, "Customers today are focused on integrated solutions that help them solve business problems, rather than just point products. Our expanding market share leadership is the direct result of EMC's broad portfolio of best-of-breed storage platforms combined with our leading software and services that help customers better manage their information as its value changes throughout its lifecycle. We continue to win over customers who are eager to take advantage of the most feature-rich, cost-effective storage solutions available anywhere."

According to IDC, in the second quarter, #1 EMC delivered its fourth consecutive quarter of year-on-year share gains in the worldwide external RAID disk storage systems market. In the second quarter, EMC grew its lead, both year over year and sequentially, in worldwide networked storage, which includes Fibre Channel SANs, iSCSI SANs and network-attached storage (NAS), to 28.3% factory revenue share. EMC also had the fastest external RAID disk storage systems revenue growth among the five largest suppliers in both Asia Pacific and Western Europe.

EMC delivered major new systems and software innovations across the entire lineup of EMC tiered storage platforms during the first half of 2004. In the first quarter, EMC unveiled new EMC Symmetrix(R) DMX(TM), CLARiiON(R) CX, Celerra(R) and Centera(TM) systems and software during the most extensive storage platforms launch in EMC's history. During the second quarter, EMC introduced two new, low-cost entry-level storage solutions -- EMC CLARiiON AX100 ("Piranha") and EMC NetWin 110 -- as well as EMC CLARiiON Disk Library, which extends backup-to-disk benefits to traditional backup environments.

About EMC

EMC Corporation (NYSE:EMC) is the world leader in products, services and solutions for information storage and management that help organizations extract the maximum value from their information, at the lowest total cost, across every point in the information lifecycle. Information about EMC's products and services can be found at www.EMC.com.

This release contains "forward-looking statements" as defined under the Federal Securities Laws. Actual results could differ materially from those projected in the forward-looking statements as a result of certain risk factors, including but not limited to: (i) adverse changes in general economic or market conditions; (ii) delays or reductions in information technology spending; (iii) risks associated with acquisitions and investments, including the challenges and costs of integration, restructuring and achieving anticipated synergies associated with the acquisitions of LEGATO Systems, Inc., Documentum, Inc. and VMware, Inc.; (iv) competitive factors, including but not limited to pricing pressures; (v) the relative and varying rates of product price and component cost declines and the volume and mixture of product and services revenues; (vi) component quality and availability; (vii) the transition to new products, the uncertainty of customer acceptance of new product offerings and rapid technological and market change; (viii) insufficient, excess or obsolete inventory; (ix) war or acts of terrorism; (x) the ability to attract and retain highly qualified employees; (xi) fluctuating currency exchange rates; and (xii) other one-time events and other important factors disclosed previously and from time to time in EMC's filings with the U.S. Securities and Exchange Commission. EMC disclaims any obligation to update any such forward-looking statements after the date of this release.

(1) IDC "Worldwide Quarterly Disk Storage Systems Tracker, September 2004,"; EMC share includes revenue from "EMC" branded storage systems only and excludes sales of re-branded EMC systems sold by EMC partners including Dell, Fujitsu-Siemens, Samsung and Langchao Electronic Information Industry Corp., Ltd.