5 THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE FINANCIAL STATEMENTS OF QUANTUM CORPORATION FOR THE QUARTER ENDED DECEMBER 26, 1999. 1,000 9-MOS MAR-31-2000 APR-1-1999 DEC-26-1999 734,175 16,601 659,698 23,144 195,218 263,359 516,646 283,286 2,413,851 715,864 325,627 0 0 948,693 341,407 2,413,851 3,461,914 3,461,914 2,878,235 2,878,325 539,047 0 21,499 23,133 21,609 1,524 0 0 0 1,524 0 0 DSS GROUP EPS--BASIC 0.75 DSS GROUP EPS--DILUTED 0.72 HDD GROUP EPS--BASIC (1.47) HDD GROUP EPS--DILUTED (1.47)