EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (Nos. 333-15111, 333-34103 and 333-61907) of Advanced Digital Information Corporation of our report dated December 8, 1998 appearing in this Annual Report on Form 10-K/A. PricewaterhouseCoopers LLP Seattle, Washington September 13, 1999