SANTA CLARA, CA–( EMWPresswire – March 31, 2008) – Data Domain (NASDAQ: DDUP), the leading

provider of deduplication storage systems for disk backup and network-based

disaster recovery, today announced that it is shipping the Data Domain

OpenStorage software option, its first product in support of the new

Veritas NetBackup OpenStorage (OST) API by Symantec. IT administrators

utilizing Data Domain storage systems in conjunction with Veritas NetBackup

6.5 will benefit from new levels of management simplicity and flexibility.

Veritas NetBackup OpenStorage disk option is designed to allow

administrators to easily manage key elements of Data Domain operation from

within the NetBackup interface. Additionally, NetBackup eliminates the

system management overhead of virtual tape libraries (VTLs) and their

associated provisioning of imaginary tape drives, slots and cartridges.

“Veritas NetBackup 6.5 OpenStorage API presents a radical idea: What if

there could be an interface between an advanced backup application and an

advanced disk-based storage infrastructure, where both could leverage each

other’s capabilities?” said Brian Biles, vice president of product

management at Data Domain. “It could be simpler and much more feature-rich

than a VTL interface, and NetBackup operators could use best practices to

manage combined interactions more directly. Data Domain is very excited to

be the first to market with storage products that integrate well with OST,

and we look forward to many future possibilities in this partnership.”

The new Data Domain OpenStorage software release consists of a software

plug-in to the OpenStorage API that runs on the NetBackup Media Manager,

which manages an optimized connection to Data Domain storage systems. The

integration between these two products allows administrators to control the

replication of the backup images between multiple Data Domain systems

simply and with a high degree of flexibility from the NetBackup console.

Unlike existing interfaces, this paradigm is designed to provide

familiarity to NetBackup users, so vaulting of data using WAN replication

is an experience similar to vaulting a copy to tape. This consolidated

view benefits customers when replicating between two or more remotely

located Data Domain systems using Data Domain’s deduplicated, network

efficient replication software.

Interwoven, Inc., a global leader in enterprise content management

solutions, has implemented Veritas NetBackup 6.5 by Symantec, and is using

the OpenStorage API with its Data Domain deduplication storage systems.

Raymond Lockley, core systems manager for Interwoven, said, “We completed a

successful and stable upgrade to Veritas NetBackup 6.5 this past December

and installed the Data Domain OST software option. We can now control our

backups, restores, and replication from within the NetBackup interface, and

can manage backup services from within the new Data Domain interface. This

makes managing these processes incredibly fast and simple. The integration

of our Data Domain systems with the OpenStorage platform is transparent,

and the cost- and time-saving benefits will be very significant for us.”

“The successful partnership between Data Domain and Veritas NetBackup

offers customers a flexible and powerful solution for data protection,”

said Matt Kixmoeller, vice president of product management, Symantec.

“Data Domain is the first vendor in the Symantec Technology Enabled Program

to deliver a qualified NetBackup 6.5 OpenStorage plug-in. The synergy

allows Symantec and Data Domain solutions to take another significant step

forward in terms of management, performance and simplicity.”

For more information about Data Domain’s partnership efforts with Symantec

Corporation, please see the Technology Partners section of the Data Domain

web site at www.datadomain.com. Formal certification of the industry’s

first OpenStorage API solution is posted at the Symantec web site at:

http://ftp.support.veritas.com/pub/support/products/NetBackup_Enterprise_Server/284599.pdf.

Data Domain’s OST software option is available immediately for Solaris and

Linux based media servers. US list pricing starts at $350 for an

entry-level Data Domain system.

ABOUT DATA DOMAIN

Data Domain® is the leading provider of Deduplication Storage systems for

disk backup and network-based disaster recovery. Over 1,500 companies

worldwide have purchased Data Domain’s storage systems to reduce costs and

simplify data management. Data Domain delivers the performance, reliability

and scalability to address the data protection needs of enterprises of all

sizes. Data Domain’s products integrate into existing customer

infrastructures and are compatible with leading enterprise backup software

products. To find out more about Data Domain, visit www.datadomain.com.

Data Domain is headquartered at 2421 Mission College Blvd., Santa Clara, CA

95054 and can be contacted by phone at 1-866-933-3873 or by e-mail at

sales@datadomain.com.

Forward-Looking Statements

This press release contains forward-looking statements regarding our

products’ ability to reduce the amount of stored back-up data and

associated storage costs and to provide faster access to data and advanced

levels of data protection, integration of Data Domain systems with the Open

Storage platform and associated benefits, and other statements identified

by forward-looking words such as “anticipated,” “believed,” “could,”

“estimate,” “expect,” “intend,” “may,” “should,” “will” and “would” or

similar words. These forward-looking statements involve risks and

uncertainties, as well as assumptions that, if they do not fully

materialize or prove incorrect, could cause our results to differ

materially from those expressed or implied by such forward-looking

statements. The risks and uncertainties include unforeseen difficulties in

realizing the benefits of this integration, our ability to react to trends

and challenges in our business and the markets in which we operate; our

ability to anticipate market needs or develop new or enhanced products to

meet those needs; market acceptance of our products; our ability to scale

our distribution channels; our ability to recruit and retain personnel; our

ability to compete in our industry; our ability to maintain and expand

relationships with technology partners; our ability to protect our

intellectual property; shortages or price fluctuations in our supply chain

and the performance of our contract manufacturer; general political,

economic and market conditions and events; and other risks and

uncertainties described more fully in our documents filed with or furnished

to the Securities and Exchange Commission. All forward-looking statements

in this press release are based on information available to us as of the

date hereof, and we assume no obligation to update these forward-looking

statements.

Data Domain, the Data Domain logo and Global Compression are trademarks or

registered trademarks of Data Domain, Inc. All other trademarks used or

mentioned herein belong to their respective owners.

Terry Frechette Lois Paul & Partners 1.781.782.5791 tfrechette@lpp.com