EXHIBIT 23.1 REPORT OF INDEPENDENT ACCOUNTANTS ON FINANCIAL STATEMENT SCHEDULE To the Board of Directors and Stockholders HMT Technology Corporation: Our audits of the consolidated financial statements referred to in our report dated April 16, 1999, appearing on page 33 of this Form 10-K also included an audit of the financial statement schedule listed in Item 14(a)(2) of this Form 10-K. In our opinion, this financial statement schedule presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP San Jose, California April 16, 1999