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, Steven J. Gomo, 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 Network Appliance, Inc., on Form 10-Q for the quarterly
period ended July 30, 2004 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
Network Appliance, Inc.


                                                 /s/ STEVEN J. GOMO
                                         ------------------------------------
                                            Steven J. Gomo
                                            Senior Vice President of Finance
                                            and Chief Financial Officer

Date:  August 31, 2004