QLogic InfiniPath InfiniBand Adapters To Support OpenFabrics Enterprise Distribution 1.0

Support of the Open Fabrics Software Stack Helps Enterprises Leverage the Benefits of InfiniBand

ALISO VIEJO, Calif., June 26, 2006 - QLogic® Corp. (Nasdaq:QLGC), the leader in Fibre Channel host bus adapters (HBAs), stackable switches and blade server switches, today announced that its InfiniPath™ InfiniBand Interconnect will support the newly released OpenFabrics Enterprise Distribution (OFED) 1.0 for Linux-based data center fabrics. OFED 1.0 is the first enterprise version of the open source software stack, providing users with a standardized, fully tested and robust tool to develop RDMA-capable datacenter fabrics. By ensuring OFED compliance of its InfiniPath InfiniBand Interconnect, QLogic enables enterprises to leverage the industry’s highest performing cluster interconnect for the most challenging computational tasks in their corporate data centers–without risk to their software investments. QLogic also announced the immediate availability of version 1.3 of the InfiniPath software stack, providing up to 33 percent higher performance on most MPI applications.

“Users of high performance cluster computers in science and engineering organizations are already taking advantage of the cost and performance benefits of the InfiniPath InfiniBand interconnect,” said Scott Metcalf, general manager, Systems Interconnect Group at QLogic. “As an OpenFabrics Alliance member and OFED contributor, we fully support OFED 1.0 as a single, multi-vendor supported software stack, which will now help enterprises realize the same benefits.”

Key to the tremendous performance advantage of the QLogic InfiniPath InfiniBand Interconnect is its unique HyperMessaging Architecture™, which delivers the highest message rate and highest effective bandwidth of any cluster interconnect available. It allows InfiniPath to support more than 10 million messages per second, which is dramatically higher than the message rate of any other cluster interconnect. The InfiniPath InfiniBand interconnect supports both PCI–Express and HyperTransport HTX interfaces for connecting into an AMD or Intel-based server platform.

The OpenFabrics Alliance provides tools, communications and resources for vendors and developers to create and share software stacks for RDMA-capable datacenter fabrics. Current members of the industry consortium include more than 25 suppliers of networking equipment, server and storage silicon, and research institutions. All members support the development, distribution and maintenance of robust software stacks for enterprise datacenter fabrics and high-performance computer clusters that leverage InfiniBand’s and iWARP’s RDMA and hardware transport architecture.

The 1.3 version of the InfiniPath InfiniBand software stack and drivers is now available for download directly from the QLogic web site. This newest release delivers up to 33 percent higher effective bandwidth on typical MPI applications. It is available for free to all existing InfiniPath InfiniBand customers and partners.

About QLogic QLogic is a leading supplier of high performance storage networking solutions including Fibre Channel host bus adapters (HBAs), blade server embedded Fibre Channel switches, Fibre Channel stackable switches, iSCSI HBAs, iSCSI routers and storage services platforms for enabling advanced storage management applications. The company is also a leading supplier of server networking including InfiniBand host channel adapters that accelerate cluster performance. QLogic products are delivered to small-to-medium business and large enterprises around the world via its channel partner community. QLogic's products are also powering solutions from leading companies like Cisco, Dell, EMC, Hitachi Data Systems, HP, IBM, NEC, Network Appliance and Sun Microsystems. QLogic is a member of the S&P 500 Index. For more information go to www.qlogic.com.

Note: All QLogic-issued press releases appear on the Company's website (www.qlogic.com). Any announcement that does not appear on the QLogic website has not been issued by QLogic.

Disclaimer - Forward Looking Statements This press release contains statements relating to future results of the Company (including certain beliefs and projections regarding business trends) that are “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected or implied in the forward-looking statements. The Company advises readers that these potential risks and uncertainties include, but are not limited to: potential fluctuations in operating results; gross margins that may vary over time; revenues may be affected by changes in IT spending levels; the stock price of the Company may be volatile; the Company’s dependence on the storage area network market; the ability to maintain and gain market or industry acceptance of the Company's products; the Company’s dependence on a limited number of customers; seasonal fluctuations and uneven sales patterns in orders from customers; the Company’s ability to compete effectively with other companies; declining average unit sales prices of comparable products; a reduction in sales efforts by current distributors; dependence on sole source and limited source suppliers; the Company’s dependence on relationships with certain silicon chip suppliers; the complexity of the Company's products; sales fluctuations arising from customer transitions to new products; the uncertainty associated with SOX 404 compliance; environmental compliance costs; terrorist activities and resulting military actions; international economic, regulatory, political and other risks; uncertain benefits from strategic business combinations; the ability to attract and retain key personnel; recognition of compensation expenses related to employee stock options and employee stock purchases; the decreased effectiveness of equity compensation; difficulties in transitioning to smaller geometry process technologies; the ability to protect proprietary rights; the ability to satisfactorily resolve any infringement claims; reliance on third party licenses; the use of “open source” software in our products; changes in our tax provisions or adverse outcomes resulting from examination of our income tax returns; computer viruses and other tampering with the Company’s computer systems; charter documents that may discourage a business combination; and facilities of the Company and its suppliers and customers are located in areas subject to natural disasters. More detailed information on these and additional factors which could affect the Company's operating and financial results are described in the Company's Forms 10-K, 10-Q and other reports filed, or to be filed, with the Securities and Exchange Commission. The Company urges all interested parties to read these reports to gain a better understanding of the many business and other risks that the Company faces. The forward-looking statements contained in this press release are made only as of the date hereof, and the Company undertakes no obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise.

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Editors’ Contact: Christine Flavio QLogic Corporation Phone: 650/934-8057 christine.flavio@qlogic.com

Investors’ Contact: Tony Massetti QLogic Corporation Phone: 949/389-7533 tony.massetti@qlogic.com