OCEANPORT, N.J. — March 12, 2003 — CommVault Systems Inc., announced today integration of CommVault^® Galaxy™ backup and recovery software with EMC Corporation's (NYSE: EMC) CLARiiON^® with ATA, the world's first storage system with integrated ATA and Fibre Channel disk drives. This integration pairs Galaxy software's high performance backup and recovery capabilities, with CLARiiON with ATA's availability and functionality, resulting in a faster, cheaper way for customers to protect their data.

This stride in disk backup delivers a high-speed storage option for critical data access, a cornerstone of most data protection strategies. The combination of CommVault software and cost-effective CLARiiON with ATA storage systems allows customers to better match their data access and availability needs with the cost of storing data. In addition, CommVault Galaxy's ability to seamlessly pool secondary storage into a single shareable resource means that customers can save time, money and the overhead normally associated with deploying and implementing information lifecycle management solutions.

"Customers are continually exploring new ways to bring more information online and extend to it all of the rich functionality of CLARiiON CX networked storage," said Chuck Hollis, vice president of storage platforms marketing at EMC. "With CommVault's Galaxy backup and recovery software and EMC CLARiiON with ATA, we can offer our joint customers the highest levels of data protection and availability at an affordable price."

"CommVault is proud to team with EMC to provide another break-through in fast data backup and recovery", said Dave West, vice president of business development. "The ability to backup customer data to CLARiiON with ATA provides our customers with a trusted solution to incorporate disk into their data protection strategy, helping them match cost and performance to data availability needs."

About CommVault Systems
CommVault Systems, Inc. provides unified enterprise data management solutions to ensure high-performance data protection, universal availability and simplified management of complex storage networks. The company's focus is to deliver simple, fast and scalable products that fit seamlessly into SAN, NAS or LAN-based infrastructures. The CommVault QiNetix platform, based on CommVault's Common Technology Engine, integrates Galaxy backup and recovery, data migration, data high availability, storage resource and SAN management software solutions. Customers can deploy individual products or seamlessly integrate new elements into an existing CommVault solution, at a fraction of the time, effort and money required by separate point products. Information on CommVault is available on the World Wide Web at www.commvault.com or by calling (732) 870-4000. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

CommVault, CommVault Systems, CommVault Galaxy, CommServe StorageManager, MediaAgent, iDataAgent, CommCell and the CommVault logo are trademarks and may be registered trademarks in some jurisdictions of CommVault Systems, Inc.

EMC and CLARiiON are registered trademarks, and SnapView is a trademarks of EMC Corporation. Other trademarks are the property of their respective owners.

Microsoft is either a registered trademark or trademark of Microsoft Corp. in the United States and/or other countries. Other product and company names herein may be trademarks of their respective owners.