QuickLinks -- Click here to rapidly navigate through this document
CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL
OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
I, Robert N. Stephens, certify that, to the best of my knowledge based upon a review of the Quarterly Report on Form 10-Q/A of Adaptec, Inc. for the period ended September 30, 2002 (the "Form 10-Q/A"), the Form 10-Q/A fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended, and that information contained in the Form 10-Q/A fairly presents, in all material respects, the financial condition and results of operations of Adaptec, Inc. for the quarterly periods covered by the Form 10-Q/A.
Date: January 14, 2003 | By: /s/ ROBERT N. STEPHENS Robert N. Stephens Chief Executive Officer |
I, David A. Young, certify that, to the best of my knowledge based upon a review of the Form 10-Q/A, the Form 10-Q/A fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended, and that information contained in the Form 10-Q/A fairly presents, in all material respects, the financial condition and results of operations of Adaptec, Inc. for the quarterly periods covered by the Form 10-Q/A.
Date: January 14, 2003 | By: /s/ DAVID A. YOUNG David A. Young Chief Financial Officer |
CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002