Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Advanced Digital Information Corporation (the “Company”) on Form 10-Q for the period ended July 31, 2005 as filed with the Securities and Exchange Commission on the date hereof (the “Form 10-Q”), I, Jon W. Gacek, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Form 10-Q 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 78o(d)); and

2. The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: September 8, 2005	/s/ JON W. GACEK
	Jon W. Gacek, Chief Financial Officer and Executive Vice President, Finance and Operations (Principal Financial and Accounting Officer)

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the report or as a separate disclosure document.