QLogic (QLGC) 10-Q 2003 Q3 Quarterly report

Exhibit 99.1

Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

I, H.K. Desai, Chief Executive Officer of QLogic Corporation (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1)	the Quarterly Report on Form 10-Q of the Company for the quarterly period ended December 29, 2002 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 780(d)); and
(2)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: February 12, 2003

/s/ H.K Desai

   H.K. Desai, Chief Executive Officer