Abstract: A disk drive testing apparatus (20) is disclosed which provides substantially automatic cycling through various tests of disk drive units. A graphical display is provided on a screen (25) to the operator to allow the operator to determine whether the disk drive is performing in or out of specifications which may be read into the apparatus from an EEPROM memory module (26). By pressing a single TEST switch (22) on the tester, the operator can cycle through a preselected series of tests on the drive unit. The tester 20 is controlled by a microcomputer central processing unit (42) to cycle through the tests and to provide a display on the screen (25) for selected tests which includes a graphics field defining a performance reference frame including a geometric target specification position, a geometric pass range, and a geometric fail range.