SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                            -------------------------



                                    Form 8-K

                                 CURRENT REPORT

                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934



                                 August 2, 2004
                  --------------------------------------------
                                 Date of Report
                        (Date of earliest event reported)



                    ADVANCED DIGITAL INFORMATION CORPORATION
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

         Washington                    0-21103                  91-1618616
- ----------------------------  -------------------------  -----------------------
(State or other jurisdiction    (Commission File No.)          (IRS Employer
     of incorporation)                                       Identification No.)

           11431 Willows Road NE, PO Box 97057, Redmond, WA 98073-9757
- --------------------------------------------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)

                                 (425) 881-8004
- --------------------------------------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


- --------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)





Item 7.           Financial Statements and Exhibits

         (c)   Exhibits

         99.1  Press release issued by Advanced Digital Information Corporation,
               dated August 2, 2004

Item 12.       Results of Operations and Financial Condition

         The information in this Form 8-K and the exhibit attached hereto shall
not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act
of 1934, nor shall it be deemed incorporated by reference in any filing under
the Securities Act of 1933, unless expressly set forth by specific reference in
such filing.

         On August 2, 2004, Advanced Digital Information Corporation issued a
press release announcing financial results relating to its third quarter 2004
ended July 31, 2004. A copy of the press release is attached hereto as Exhibit
99.1 and is incorporated herein by reference. The press release should be read
in conjunction with the note regarding forward-looking statements, which is
included in the text of the press release.







                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its behalf
by the undersigned, hereunto duly authorized.

Date:  August 2, 2004

                              Advanced Digital Information Corporation

                              By: /s/ Linda Breard
                                  ----------------------
                              Linda Breard

                              Executive Director Finance