Network Appliance Receives ISO 14001 Certification

Sunnyvale, Calif. - December 15, 2004 - Network Appliance, Inc. (NASDAQ: NTAP), the leader in advanced networked storage solutions for today's data-intensive enterprise, today announced that it has received International Organization for Standardization (ISO) 14001 Environmental Management System Certification. ISO 14001 is a management system that helps companies develop and execute a policy that ultimately reduces harmful effects on the environment. NetApp has also maintained ISO 9001 certification since May 1997.

"Superior environmental practices have always been a top priority for Network Appliance, and ISO standards represent the highest quality in environmental management practice," said Dan Warmenhoven, CEO for Network Appliance. "We are committed to compliance with relevant environmental legislation, regulations, and other requirements to meet customer and community needs and expectations and are proud of our certification to ISO 14001."

By achieving this certification, NetApp is making commitments to continually improve internal environmental objectives, prevent pollution, and conserve natural resources for future generations and comply with regulatory legislation.

Network Appliance also won the Outstanding Environmental Achievement award from the city of Sunnyvale, California, for its on-site environmentally friendly cogeneration system. The cogeneration system produces its own electricity and uses the heat that comes out as waste to power the cooling system for its data center. Network Appliance received a congressional letter from a member of the United States House of Representatives recognizing this achievement.

About ISO
ISO (International Organization for Standardization) is the world's largest developer of standards. The organization consists of a network of national standards instituted from 148 countries working in partnership with international organizations, governments, industries, businesses and consumer representatives. ISO standards are technical agreements, which provide the framework for compatible technology worldwide.

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 continue to drive "The evolution of storage.™" Information about Network Appliance™ solutions and services is available at www.netapp.com.

Press Contacts:
Jodi Baumann
Network Appliance, Inc.
(408) 822-3974
jodi@netapp.com