Release Details

CommVault Wins Diogenes Labs - Storage Magazine Quality Award for

                 Enterprise Backup & Recovery Software

OCEANPORT, N.J.--(BUSINESS WIRE)--Sept. 12, 2007--CommVault(R) (NASDAQ:CVLT) today announced that CommVault Galaxy(R) Data Protection software, one of the five core modules that comprise the CommVault Simpana(TM) 7.0 software suite, has won the third annual Diogenes Labs - Storage magazine Quality Award in the enterprise-class backup and recovery software category, as featured in the September 2007 issue of Storage magazine (www.searchstorage.com). CommVault secured the number one overall ranking against a field of five other enterprise competitors with top marks in four out of five categories, including sales force competence, product features, initial product quality, product reliability and technical support. Additionally, when asked "Would you buy this product again?" most notably, 85.2 percent of those surveyed said they would purchase CommVault Galaxy again, ranking the overall strength of the customer experience with CommVault higher than all five other competitors in the survey.

"The voice of the customer dictates the market, so we are thrilled and honored to be recognized as the enterprise leader in this year's Diogenes Labs - Storage magazine Quality Award for data protection," said Bob Hammer, president and CEO of CommVault. "Delivering value to our customers is the focus of everything that we do at CommVault. This win sends a clear message that end users applaud the innovation and continued advancements that CommVault is making in heterogeneous data protection and information management."

A recognized award program based on objective, empirical and statistically valid assessment of product quality and reliability, the Diogenes Labs - Storage magazine Quality Award program is designed to quantify real-world experience factors by surveying IT professionals directly. For the enterprise backup and recovery software program, more than 500 respondents identified as backup and recovery users were assessed across several categories: sales force competence, product features, initial product quality, product reliability and technical support. Respondents were also asked about their willingness to repurchase the products.

CommVault Galaxy Data Protection simplifies the administration of increasingly complex disk and tape storage environments using a uniquely singular platform approach that helps customers better manage and protect data, while reducing the operational costs associated with IT management. CommVault has consistently built on its history of product innovation to make CommVault Galaxy Data Protection one of the industry's leading data protection software solutions. In addition to winning this year's Diogenes Labs - Storage magazine Quality Award, CommVault Galaxy Data Protection also ranked a "strong positive" - the highest possible rating - by Gartner research in its 2006 MarketScope for Enterprise Backup/Recovery Software(1) report, further underscoring CommVault's leading position in the enterprise backup and recovery market.

For more information about the CommVault Simpana 7.0 software suite, please visit http://www.commvault.com/products/.

About The Diogenes Labs - Storage Magazine Quality Awards

The Diogenes Labs - Storage magazine Quality Awards are designed to identify and recognize products that have proven their quality and reliability in actual use. The results are derived from a survey of qualified Storage subscribers, who assess products in five main categories: sales force competence, product features, initial product quality, product reliability and technical support. Their methodology incorporates statistically valid polling that eliminates market share as a factor. Their objective is to identify the most reliable products on the market regardless of vendor name, reputation or size. Products are rated on a scale from 1.0 to 8.0, where 8.0 is the most favorable possible score. For more information about this awards program, visit www.storagemagazine.com.

About CommVault(R)

A singular vision - a belief in a better way to address current and future data management needs - guides CommVault in the development of Singular Information Management(TM) solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. CommVault's exclusive single-platform architecture gives companies unprecedented control over data growth, costs and risk. CommVault's software was designed to work together seamlessly from the ground up, sharing a single code and common function set, to deliver superlative Data Protection, Archive, Replication, Search and Resource Management. More companies every day join those who have discovered the unparalleled efficiency, performance, reliability, and control only CommVault can offer. Information about CommVault is available at www.commvault.com. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States. (cvlt-co)

Safe Harbor Statement

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.

(C)1999-2007 CommVault Systems, Inc. All rights reserved. CommVault, CommVault and logo, the "CV" logo, CommVault Systems, Solving Forward, SIM, Singular Information Management, Simpana, CommVault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, GridStor, Vault Tracker, QuickSnap, QSnap, Recovery Director, CommServe, CommCell, and InnerVault are trademarks or registered trademarks of CommVault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.

(1) Gartner Research, "Marketscope for Enterprise Backup/Recovery Software, 2006," by Dave Russell, Carolyn DiCenzo, September 16, 2006

    CONTACT: Media Contact:
             CommVault
             Dani Kenison, 732-728-5370
             pr@commvault.com
             or
             Investor Relations Contact:
             CommVault
             Michael Picariello, 732-728-5380
             ir@commvault.com

    SOURCE: CommVault