NetApp (NTAP) 10-Q 2013 Q2 Quarterly report

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Nicholas R. Noviello, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of NetApp, Inc., on Form 10-Q for the quarterly period ended October 26, 2012 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that information contained in such Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of NetApp, Inc.

/s/ NICHOLAS R. NOVIELLO

Nicholas R. Noviello

Executive Vice President and Chief Financial Officer

(Principal Financial Officer and Principal Accounting Officer)

Dated: November 30, 2012