EMC Extends Cash Tender Offer to Acquire Data Domain

HOPKINTON, Mass., June 26 /PRNewswire/ -- EMC Corporation (NYSE: EMC) today
announced an extension of its all-cash tender offer to purchase all
outstanding shares of Data Domain, Inc. (Nasdaq: DDUP) common stock for $30
per share. To provide additional time to satisfy closing conditions, the
offering period now expires at 12:00 midnight Eastern Daylight Time (EDT) on
July 10, 2009. The initial offering period, which began on June 2, 2009, was
previously scheduled to expire at 12:00 midnight EDT on June 29, 2009.

Joe Tucci, EMC Chairman, President and CEO, said, "EMC's $30 per share
all-cash offer remains superior to NetApp's stock and cash offer and, very
importantly, delivers to Data Domain stockholders the price certainty and
price protection its management team and board stated as important priorities
during their negotiations with NetApp. We continue to anticipate a routine
review by the FTC resulting in a timely regulatory approval. We look forward
to the execution of the definitive agreement and closing of the transaction
with EMC."

The tender offer is being transacted through Envoy Merger Corporation, a
wholly owned subsidiary of EMC formed for the purpose of making the offer.
Approximately 174,645 shares of Data Domain common stock, representing
approximately 0.28% of the common stock outstanding, have been tendered as of
3:30 p.m. EDT on June 26, 2009.

Important Information about the Tender Offer

This press release is neither an offer to purchase nor a solicitation of an
offer to sell shares of Data Domain, Inc. EMC Corporation and Envoy Merger
Corporation have filed with the SEC a tender offer statement on Schedule TO
containing an offer to purchase, forms of letters of transmittal and other
documents relating to the tender offer, and these documents have been mailed
to the stockholders of Data Domain, Inc. These documents contain important
information about the tender offer and stockholders of Data Domain, Inc. are
urged to read them. Investors and stockholders of Data Domain, Inc. are able
to obtain a free copy of these documents and other documents filed by EMC
Corporation and Envoy Merger Corporation with the SEC at the website
maintained by the SEC at www.sec.gov. In addition, the tender offer statement
and related materials may be obtained for free by directing such requests to
EMC Corporation at Attention: Office of the General Counsel, 176 South Street,
Hopkinton, MA 01748.

About EMC

EMC Corporation (NYSE: EMC) is the world's leading developer and provider of
information infrastructure technology and solutions that enable organizations
of all sizes to transform the way they compete and create value from their
information. Information about EMC's products and services can be found at
www.EMC.com.

EMC is a registered trademark of EMC Corporation. All other trademarks used
are the property of their respective owners.

Forward-Looking Statements

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) our ability to protect our proprietary technology; (iv) risks
associated with managing the growth of our business, including risks
associated with acquisitions and investments and the challenges and costs of
integration, restructuring and achieving anticipated synergies; (v)
fluctuations in VMware, Inc.'s operating results and risks associated with
trading of VMware stock; (vi) competitive factors, including but not limited
to pricing pressures and new product introductions; (vii) the relative and
varying rates of product price and component cost declines and the volume and
mixture of product and services revenues; (viii) component and product quality
and availability; (ix) the transition to new products, the uncertainty of
customer acceptance of new product offerings and rapid technological and
market change; (x) insufficient, excess or obsolete inventory; (xi) war or
acts of terrorism; (xii) the ability to attract and retain highly qualified
employees; (xiii) fluctuating currency exchange rates; (xiv) litigation that
we may be involved in; and (xv) 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. These statements are forward-looking,
and actual results may differ materially. EMC disclaims any obligation to
update any forward-looking statements in this release after the date of this
release.

SOURCE EMC Corporation

Dave Farmer of EMC Corporation, +1-508-293-7206, farmer_dave@emc.com