Data Domain Joins SNIA

Market Wire, April, 2008

Data Domain (NASDAQ: DDUP), the leading provider of deduplication storage systems for enterprise disk backup and network-based disaster recovery, today announced that it has joined the Storage Networking Industry Association (SNIA). Data Domain will work with SNIA and its member companies to help define, implement, qualify and teach improved and reliable methods for the protection, retention and lifecycle management of electronic data and information.

Data Domain has also joined SNIA's Data Management Forum (DMF) and is a founding member of the DMF's new Data Deduplication and Space Reduction Special Interest Group (DDSR SIG). With other DDSR SIG member companies, Data Domain is participating in advancing market adoption of deduplication technology and is educating end-users regarding its ROI and related best practices. For example, SNIA veteran Devin Hamilton, Principal Systems Engineer and Storage Architect at Data Domain, was recently elected co-chairman of the DMF's Data Protection Initiative (DPI). Hamilton recently delivered a deduplication tutorial on behalf of the DDSR SIG at Storage Networking World in April. His history of work with the SNIA spans several companies over seven years, and he has been appointed to the Board of Directors of the DMF and is coordinating the participation of additional Data Domain resources across the organization.

"It is important that vendors, resellers and end users work together to collaborate on ideas and share knowledge with the common goal of developing, promoting and marketing innovative storage technologies," said Devin Hamilton, Data Domain Principal Systems Engineer and co-chairman of SNIA's DMF Data Protection Initiative. "As a technology, Data Deduplication holds out so many opportunities for the simplification of storage processes and data management. Still, best practices and ongoing education will be necessary to ensure that its promise is fully realized by the end user community. We look forward to actively contributing to SNIA's efforts."

SNIA leads the storage industry worldwide in developing and promoting standards, technologies, and educational services to empower organizations in the management of information. Data Domain was a pioneer in the development of data deduplication technologies and is now shipping its fifth generation of deduplication storage systems.

"We are pleased to welcome Data Domain as a new member, especially given their experience with data deduplication solutions," said Jeff Porter, Chair of SNIA Data Management Forum. "The Data Deduplication and Space Reduction Special Interest Group is a new and exciting effort for the SNIA DMF. We welcome all vendors in the data deduplication market who take an active role in this committee."

About the SNIA's Data Management Forum

The SNIA Data Management Forum is a cooperative initiative of IT professionals, vendors, integrators, and service providers working together to conduct market education, develop best practices and promote standardization activities that help organizations become Information-Centric enterprises. Areas of focus include the technologies and services that support information lifecycle management, data protection, information security, and long-term digital information retention and preservation. For more information, visit www.snia-dmf.org .

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 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 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 .

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 Ed Luboja Data Domain, Inc. 1.914.698.1346 edward.luboja@datadomain.com