Release Details

— With CommVault certification, CentricStor from Fujitsu Siemens Computers provides industry-leading storage management solution —

Munich, Germany and Oceanport, N.J. — March 28, 2006 — CommVault Systems, Inc. and Fujitsu Siemens Computers announced today that CentricStor has been certified for use with CommVault® QiNetix™ software. Customers who depend on CommVault to manage their business critical data can now take advantage of CentricStor from Fujitsu Siemens Computers to improve the performance, availability and reliability of their tape processing and to consolidate their tape storage. CentricStor, the leading virtual tape solution, employs disk-to-disk-to-tape (D2D2T) technology to offer outstanding information lifecycle management (ILM) functions for data protection in business-critical environments.

"With QiNetix and CentricStor, users in enterprises of all sizes benefit from scalable, reliable data management," said Dave West, vice president of marketing and business development at CommVault. "CommVault products are designed to provide efficient data management, simplifying storage management and recovery of business-critical data. We are pleased to certify CentricStor from Fujitsu Siemens Computers as a powerful complementary technology to CommVault."

The CommVault QiNetix 6.1 Unified Data Management™ solution provides a unified view of an enterprise's data protection environment, easing management and administration of backups, snapshot management, remote replication, data migration and archiving, email compliance, SRM and SLM reporting. CommVault Galaxy™ backup and recovery software, a component of the QiNetix product suite, supports policy-based actions across storage environments and enables fast, granular backup and recovery in distributed, heterogeneous environments. QiNetix and Galaxy deliver greater data availability and manageability, provide seamless integration with leading operating systems, applications and environments, and are designed to provide superior data protection.

CentricStor, the virtual tape solution developed by Fujitsu Siemens Computers, offers an integrated and efficient virtualization for D2D2T-backup and enables users to consolidate their tape processing across different platforms. This means that all data in heterogeneous server environments can be backed up using a central storage resource.

CentricStor offers integrated functions of Information Lifecycle Management (ILM) for policy based automation of tape operations, such as migration of the cached data from the internal disk system to highly scalable tape libraries. CentricStor's large number of virtual tape drives enables a significant reduction in the time required for backup and recovery. CentricStor provides full control for all physical tape and library operations and eliminates all server dependencies by means of this virtual layer, thus increasing data availability and reliability during backups.

Broad Support
CommVault certification has further expanded the remarkable diversity of CentricStor in supporting a spectrum of current IT landscapes, including mainframes, NAS storage and open systems. With universal interfaces, the CentricStor Virtual Tape Appliance allows complete, transparent integration into existing IT environments.

"The certification by CommVault is a proof point of our commitment that CentricStor will support the greatest depth and breadth of storage systems on the market," said Dr. Helmut Beck, vice president storage at Fujitsu Siemens Computers. "CommVault's certification is an important milestone for CentricStor offering the broadest platform support. We have been focussing on making sure that CentricStor offers industry-leading capabilities, delivering the widest, most complete range of ILM functions for tape processing, by means of its virtualization layer."

CentricStor Success Story
The virtual tape solution, first introduced in 2000, is successfully established with more than 400 CentricStor systems deployed worldwide. The powerful, reliable virtual tape technology is already trusted by some of the world's largest banks, insurance companies and telecommunications companies. CentricStor continues to grow in popularity: Fujitsu Siemens Computers recently expanded the CentricStor production area in its newly-created Solution Center in Augsburg, in order to better serve growing customer demand.

About CentricStor
CentricStor is the trade name for "Virtual Tape Solutions" from Fujitsu Siemens Computers and is offered on various platforms (CentricStor VTA models, CentricStor VTC, CentricStor SBU solution packages). CentricStor virtual tape technology offers an efficient and integrated disk-to-disk-to-tape backup (D2D2T). The unified integration of disk into the data path to tape storage with CentricStor eliminates backup and restore bottlenecks. By combining the speed of disk with the behavior and value of tape storage CentricStor retains the capacity and long-term data protection capabilities for today's backup requirements. The integrated ILM functionality (Information Lifecycle Management) for policy-based automation simplifies administration of the entire tape processing by improving quality of service. The self-contained virtual tape solution can be integrated without any adaptation of proven backup scenarios and upgrading to the latest tape technology happens without affecting host applications. CentricStor supports the most widely-used backup applications on the market-leading system platforms and the most important environments for tape automation. Numerous satisfied customers in Europe, the United States, Japan and Southeast Asia are already using CentricStor for their data protection in a consolidated Nearline environment. Further information on CentricStor is available at www.centricstor.com.

About Fujitsu Siemens Computers
Fujitsu Siemens Computers is the leading European IT provider with a strategic focus on next-generation Mobility and Dynamic Data Center products, services and solutions. With a portfolio of exceptional depth, our offering extends from handhelds through desktops to enterprise-class IT infrastructure solutions. Fujitsu Siemens Computers has a presence in all key markets across Europe, the Middle East and Africa. Leveraging the strengths, innovation and global reach of our joint shareholders, Fujitsu Limited and Siemens AG, we make sure we meet the needs of customers: large corporations, small and medium enterprises and private users. The company is a member of the United Nations Global Compact initiative. For more information on Fujitsu Siemens Computers, please visit: www.fujitsu-siemens.com.

About CommVault
CommVault® provides Unified Data Management™ solutions for high- performance data protection, universal availability and simplified management of data on complex storage networks. The CommVault® QiNetix™ platform, based on CommVault's Common Technology Engine, integrates Galaxy backup and recovery, snapshot management and recovery, active data migration and archiving, e-mail compliance, enterprise service level management and reporting and storage resource management software solutions. The QiNetix unified approach allows customers to add/integrate QiNetix components, at a fraction of the time, effort and money required by separate point products. Information about 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.

About CommVault Galaxy
CommVault Galaxy Backup & Recovery software offers users unified, scalable backup and recovery for distributed, heterogeneous environments. With Galaxy, policy-based actions can be enforced across all operating environments, applications and storage types. The easy-to-use, browser interface allows users to perform high-speed backups and restores to help maintain data access. Galaxy includes a robust reporting capability to ensure easy of management in enterprise data protection environments.

©2006 CommVault Systems, Inc. CommVault Systems, CommVault Galaxy, CommVault QiNetix, DataMigrator, DataArchiver, QNet, CommServe StorageManager, MediaAgent, iDataAgent, CommCell and the CommVault logo are trademarks and may be registered trademarks in some jurisdictions of CommVault Systems, Inc. Product and company names herein may be trademarks of their respective owners.

This press release may contain forward-looking statements, including statements regarding financial projections, which are subject to risks and uncertainties, such as competitive factors, difficulties and delays inherent in the development, manufacturing, marketing and sale of software products and related services, general economic conditions and others. Statements regarding CommVault's beliefs, plans, expectations or intentions regarding the future are forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. All such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from anticipated results. CommVault does not undertake to update its forward-looking statements.