Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - COMMVAULT SYSTEMS INCFinancial_Report.xls
10-K - FORM 10-K - COMMVAULT SYSTEMS INCc15860e10vk.htm
EX-31.2 - EXHIBIT 31.2 - COMMVAULT SYSTEMS INCc15860exv31w2.htm
EX-21.1 - EXHIBIT 21.1 - COMMVAULT SYSTEMS INCc15860exv21w1.htm
EX-32.2 - EXHIBIT 32.2 - COMMVAULT SYSTEMS INCc15860exv32w2.htm
EX-23.1 - EXHIBIT 23.1 - COMMVAULT SYSTEMS INCc15860exv23w1.htm
EX-31.1 - EXHIBIT 31.1 - COMMVAULT SYSTEMS INCc15860exv31w1.htm

Exhibit 32.1

Certification Pursuant To
18 U.S.C. Section 1350
As Adopted Pursuant To
Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report of CommVault Systems, Inc. (the “Company”) on Form 10-K for the period ended March 31, 2011 as filed with the Securities and Exchange Commission (the “Report”), I, N. Robert Hammer, Chairman, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

    (1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

    (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
     
/s/  N. ROBERT HAMMER
   
 
   
N. Robert Hammer
   
Chairman, President and Chief Executive Officer
   
     
May 17, 2011
   

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