X0201 4 2004-02-20 0000770403 ADVANCED DIGITAL INFORMATION CORP ADIC 0001199514 BAYLEY CHRISTOPHER T 1411 4TH AVENUE #1430 SEATTLE WA 98101 1 0 0 0 Common Stock 2004-02-20 4 S 0 3000 12.99 D 104000 D Common Stock 1988-08-08 4 J 0 0 D 4000 I By Spouse Shares sold pursuant to a 10b5-1 trading plan entered into in December 2003. Not applicable. Linda A. Schoemaker Power of Attorney for Christopher T. Bayley 2004-02-24