Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-15111, 333-34103, 333-61907 and 333-93429) of Advanced Digital Information Corporation of our report dated December 7, 1999 relating to the financial statements and financial statement schedule, which appears in this Form 10-K. PricewaterhouseCoopers LLP Seattle, Washington January 18, 2000