Industry Analyst Reports Demonstrate NetApp Market Success—NetApp® Posts Gains in Storage Software and Hardware Markets

Sunnyvale, Calif. - September 10, 2007 -- Network Appliance, Inc. (NASDAQ: NTAP) announced today that it gained share in both the storage software and hardware markets in the first half of 2007, as reported in IDC's Worldwide Quarterly Storage Software Tracker Q2 20071 and Worldwide Quarterly Disk Storage Systems Tracker Q2 20072.

According to IDC, NetApp grew twice as fast as the overall storage software market from Q1'07 to Q2'07, and posted share gains across each submarket segment in which it provides offerings. This marks the eighth consecutive quarter that NetApp has outpaced the overall storage software market. For overall storage software market revenues, NetApp achieved 10.5% market share in 1H'07 and grew at 34.2% while the market grew at 10.4% year over year (Q2'06-Q2'07). In that time period, NetApp grew the fastest among companies tracked by IDC.

Also in that time period, IDC found that NetApp grew fastest among the top five storage replication software vendors and currently holds the number two position, with 28.0% revenue market share for 1H'07. Specifically, NetApp grew over three times the market rate compared to Q2'06 and seven times the rate of the market leader in this subsegment. This also marks the sixth consecutive quarter in which NetApp grew faster than the replication submarket.

In its Worldwide Quarterly Disk Storage Systems Tracker Q2 2007, IDC found that the NetApp open systems networked storage market3 share grew to 9.9% in 1H'07, from 9.3% in 2006. NetApp continues to lead the iSCSI market in terms of revenue and capacity, with 23.1% revenue share and 30.9% capacity share for 1H'07. Additionally, NetApp gained both revenue and capacity share in the FC SAN market. NetApp continues to lead in its core market of NAS in terms of capacity.

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. Information about Network Appliance™ 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 market and market share trends that benefit the Company, continued customer acceptance, and adoption rates of the Company's solutions. These forward-looking statements involve risks and uncertainties, and actual results could vary. Factors that could impact our ability to achieve our goals include general economic and industry conditions, including expenditure trends for storage-related products; our ability to deliver new product architectures and products that meet market acceptance; our ability to design products that compete effectively from a price and performance perspective; and other important factors as described in Network Appliance, Inc. reports and documents filed from time to time with the Securities and Exchange Commission, including our most recently submitted 10-K and 10-Q.

1 IDC Worldwide Quarterly Storage Software Tracker Q2 2007.
2
IDC Worldwide Quarterly Disk Storage Systems Tracker Q2 2007.
3
Open Systems Networked Storage includes NAS, Fibre Channel SAN, and iSCSI SAN

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