UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

                                    FORM 8-K

                                 CURRENT REPORT
                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

        Date of Report (date of earliest event reported): August 2, 2007

                              --------------------

                             Network Appliance, Inc.
             (Exact name of Registrant as specified in its charter)

              Delaware                  0-27130             77-0307520
  (State or other jurisdiction of     (Commission        (I.R.S. Employer
   incorporation or organization)     File Number)    Identification Number)

                               495 East Java Drive
                               Sunnyvale, CA 94089
               (Address of principal executive offices) (Zip Code)

                                 (408) 822-6000
              (Registrant's telephone number, including area code)

- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------

Item 2.02.

      On August 2, 2007, Network Appliance, Inc. issued a press release
announcing its preliminary results for first quarter fiscal year 2008. The press
release is attached as an exhibit to this Form 8-K, and the information set
forth therein is hereby incorporated by reference into this Item 2.02.

Item 9.01(c).

      Network Appliance, Inc.'s August 2, 2007 press release is hereby furnished
as Exhibit 99.1 to this Form 8-K in connection with the disclosures under Item
2.02 of this Form 8-K.


                                   SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.


August 2, 2007                                 By:   /s/    Steven Gomo
                                                     ---------------------------
                                                            Steven J. Gomo
                                                       Chief Financial Officer



- --------------------------------------------------------------------------------

                                Index to Exhibits

Exhibit      Description
- -------      -----------

   99.1      Press release of Network Appliance, Inc. issued on August 2, 2007.

- --------------------------------------------------------------------------------
                                                                    Exhibit 99.1

 Network Appliance Announces Preliminary First Quarter Fiscal Year 2008 Results

     SUNNYVALE, Calif.--(BUSINESS WIRE)--Aug. 2, 2007--Network Appliance, Inc.
(NASDAQ:NTAP), the leader in advanced networked storage solutions, today
announced preliminary results for the first quarter of FY2008. Revenues are
expected to be in the range of $684 to $688 million, down approximately 14% to
15% sequentially from the fourth quarter of FY2007 and up approximately 10% to
11% over the same quarter one year ago. GAAP net income per share is expected to
be in the range of $0.08 to $0.09 and non-GAAP(1) net income per share is
expected to be in the range of $0.19 to $0.20.

     These preliminary results are below the company's previously stated targets
issued on May 23, 2007 for a sequential revenue decrease of 6% to 7%, which
equates to approximately $745 to $753 million in revenue, and for GAAP net
income per share of $0.14 and $0.15, and non-GAAP net income per share of $0.24
to $0.25. Network Appliance will host a conference call this afternoon to
discuss these preliminary results. The final results of the first quarter of
fiscal year 2008 will be announced on August 15, 2007, after the close of
market.

     "We are disappointed with our Q1 results. We believe our performance was
impacted by some continued softness in enterprise storage spending, most notably
in our existing customer accounts in the U.S. and parts of Europe," said Dan
Warmenhoven, CEO of Network Appliance. "However, these same enterprise customers
who have slowed their spending tell us that our value proposition remains the
best in the industry and we did not see any decline in our competitive win
rates."

     Webcast and Conference Call Information

     --   The NetApp(R) preliminary results conference call will be broadcast
          live via the Internet at http://investors.netapp.com on Thursday,
          August 2, at 2:00 p.m. Pacific time. This press release and any other
          information related to the call will also be posted on the Website at
          that location.

     --   The conference call will also be available live in a listen-only
          format at (800) 599-9829 in the United States and (617) 847-8703
          outside the United States. The pass code for both numbers is 84263943.

     --   A replay will be available for 72 hours following the completion of
          the live call by dialing (888) 286-8010 in the United States and (617)
          801-6888 outside the United States, using replay code 16526483. The
          Webcast replay will be posted on our Website for at least one year.

     About Network Appliance

     Network Appliance is a world leader in unified storage solutions for
today's data-intensive enterprise. Since its inception in 1992, Network
Appliance has delivered technology, product, and partner firsts that simplify
data management. Information about Network Appliance(TM) solutions and services
is available at www.netapp.com.

     "Safe Harbor" Statement under U.S. Private Securities Litigation Reform Act
of 1995

     This press release contains forward-looking statements within the meaning
of the Private Securities Litigation Reform Act of 1995. These statements
include the statements related to the final financial results that we expect to
report for our first quarter of fiscal 2008. These forward-looking statements
involve risks and uncertainties, and actual results could vary. Important
factors that could cause actual results to differ materially from those in the
forward-looking statements include the fact that final results for our first
quarter of fiscal 2008 could vary materially because of any accounting
adjustments made during our quarterly close. We disclaim any obligation to
update information contained in these forward-looking statements whether as a
result of new information, future events, or otherwise.

     (1) Non-GAAP results exclude amortization of intangible assets, in-process
research and development, stock compensation, other acquisition-related cost,
restructuring charges/recoveries, gain/loss on sales of assets and investments,
certain other nonrecurring events, and the related effects on income taxes as
well as certain discrete GAAP provisions for income tax matters recognized
ratably for non-GAAP purposes.

     Network Appliance Usage of non-GAAP Financials

     The Company refers to the non-GAAP financial measures cited above in making
operating decisions because they provide meaningful supplemental information
regarding the Company's operational performance. These non-GAAP financial
measures exclude amortization of intangible assets, in-process research and
development, stock compensation, other acquisition-related cost, restructuring
charges/recoveries, gain/loss on sales of assets and investments, certain other
nonrecurring events, and the related effects on income taxes as well as certain
discrete GAAP provisions for income tax matters recognized ratably for non-GAAP
purposes. We have excluded these items in order to enhance investors'
understanding of our ongoing operations. The use of these non-GAAP financial
measures has material limitations because they should not be used to evaluate
our company without reference to their corresponding GAAP financial measures. As
such, we compensate for these material limitations by using these non-GAAP
financial measures in conjunction with GAAP financial measures.

     These non-GAAP financial measures facilitate management's internal
comparisons to the Company's historical operating results and comparisons to
competitors' operating results. We include these non-GAAP financial measures in
our earnings announcement because we believe they are useful to investors in
allowing for greater transparency with respect to supplemental information used
by management in its financial and operational decision making, such as employee
compensation planning. In addition, we have historically reported similar
non-GAAP financial measures to our investors and believe that the inclusion of
comparative numbers provides consistency in our financial reporting at this
time.

     NetApp is a registered trademark and Network Appliance is a trademark of
Network Appliance, Inc. in the U.S. and other countries. All other brands or
products are trademarks or registered trademarks of their respective holders and
should be treated as such.


                       NETWORK APPLIANCE, INC.
        RECONCILIATION OF NON GAAP PRELIMINARY RESULTS TO GAAP
                   EXPRESSED AS EARNINGS PER SHARE
                          FIRST QUARTER 2008
                             (Unaudited)


                                                     First Quarter
                                                          2008
                                                  --------------------

Non-GAAP Preliminary Results                         $0.19 - $0.20


Adjustments of Specific Items to
     Earnings Per Share for the First
     Quarter 2008:


   Amortization of intangible assets                     (0.01)
   Stock based compensation expense                      (0.11)
   Prior acquisition-related costs                       (0.01)
   Income tax effect                                      0.02
                                                  --------------------
Total Adjustments                                        (0.11)

GAAP Preliminary Results - Earnings Per Share        $0.08 - $0.09


     CONTACT: Network Appliance, Inc.
              Jodi Baumann, 408-822-3974 (Press Contact)
              jodi@netapp.com
              Ingemar Lanevi, 919-476-5750 (Investor Contact)
              Ingemar@netapp.com
              Billie Fagenstrom, 408-822-6428 (Investor Contact)
              billief@netapp.com