展览23.1

独立注册会计师事务所之同意

本公司同意在注册声明(表格S-3第333-29525、333-103680及333-109587号)及注册声明(表格S-8第333-30623、333-30627、333-32691、333-58193、333-65043、333-83219、333-84851、333-89249、333-42358、333-44706、333-64350、333-98235、333-108015、333-113098和333-120632)与1986年股票期权计划有关;1993年长期奖励计划;1996年董事会股票期权计划;ATL Products, Inc. 1996股票激励计划;ATL Products, Inc. 1997股票激励计划;员工股票购买计划;Meridian Data, Inc.1987 Meridian Data激励股票期权计划;1988年激励股票计划;1995年董事选择计划; 1997 Incentive Stock plan; 2003 Nonemployee Director Equity Incentive Plan and Supplemental Stock Option Plan of Quantum Corporation of our reports dated June 8, 2005, with respect to the consolidated financial statements and schedule of Quantum Corporation, Quantum Corporation management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of Quantum Corporation, included in this Annual Report (Form 10-K) for the year ended March 31, 2005.

/s/安永会计师事务所

加州帕罗奥多市

6月8日。2005