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 12, 2004
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                                 Date of Report
                        (Date of earliest event reported)



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

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

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

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


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          (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 12, 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 12, 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.

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                                   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 12, 2004

                          Advanced Digital Information Corporation

                          By: /s/ Jon Gacek
                              -------------
                              Jon Gacek
                              Executive Vice President & Chief Financial Officer

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