NetApp® Storage Software Growth Outpaces Market for Fourth Consecutive Year

Sunnyvale, Calif. - March 19, 2007 -- Network Appliance, Inc. (NASDAQ: NTAP) announced today that it continues to gain momentum in the storage software market, growing the fastest among the top 10 leading storage software providers in 2006. According to IDC's Worldwide Quarterly Storage Software Tracker Q4 20061, NetApp grew six times faster than the overall storage software market from 2005 to 2006, and posted share gains across each submarket segment in which it provides offerings. According to IDC, the company also maintained the number-two market share position in the storage replication software market, gaining five market share points from 2005 to 2006 and closing the gap on the market leader.

This marks the fourth consecutive year that NetApp has outpaced the overall storage software market. For overall storage software market revenues, NetApp achieved 9.0% market share in 2006 and grew at 50.1%, while the market grew at 8.3% year over year.

Also according to IDC, NetApp grew fastest among the top five storage replication software vendors and is currently in the number two position, narrowing the gap on the current replication market leader. Specifically, NetApp grew almost three times the market rate, and 36 times the rate of the market leader in this subsegment. This also marks the fourth consecutive year in which NetApp grew greater than 50%, year over year, in the software replication market, growing from 17.8% to 22.8% market share between 2005 and 2006.

"Customers today are making purchase decisions based on simplicity and manageability of enterprise-class software capabilities," said Elisa Steele, vice president of Corporate Marketing at Network Appliance. "By combining powerful software into robust systems, NetApp is continuing to deliver data management solutions across all segments of our business that can solve a variety of customer needs."

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. 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 Storage Software Tracker, March 2007

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Network Appliance, Inc.
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jodi@netapp.com

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