Sunnyvale, Calif. - March 2, 2006 -- Network Appliance, Inc. (NASDAQ: NTAP) today announced that in the 4th quarter 2005, it has maintained its position as the market leader in iSCSI in both revenue and capacity for the past 11 quarters and continued its leadership in capacity market share in network-attached storage (NAS).

According to IDC's Worldwide Quarterly Disk Storage Systems Tracker Q4 2005,¹ NetApp demonstrated continued leadership in the iSCSI storage market, with number-one market share in capacity shipped (34.6%) and revenue (32.0%) for the full year 2005. In FC SAN, NetApp nearly doubled its year-end 2005 revenue market share to 1.6%, up from 0.9% in 2004, doubled its unit share to 2.2% from 1.1%, and grew capacity shipped by 230%. Finally, NetApp maintained leadership in its core NAS market, with a 42.6% capacity market share, and grew capacity shipped by 56% from year end 2004.

"Our continued success in NAS, iSCSI, and FC SAN further demonstrates the strong customer demand for NetApp simplified data management solutions across all major storage segments," said Patrick Rogers, vice president of Products and Partners at Network Appliance. "With our commitment to innovation and customer partnerships, NetApp continues to lead in the markets that represent the future of data management."

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™ 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.'s reports and documents filed from time to time with the Securities and Exchange Commission, including our most recently submitted 10-K and 10-Q.

¹IDC's Worldwide Quarterly Disk Storage Systems Tracker Q4 2005.

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Network Appliance, Inc.
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Jodi.Baumann@netapp.com

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