An automatic disk testing apparatus and method for testing flexible disks is disclosed. The apparatus includes a gravity feed disk hopper and vacuum disk plate which sequentially present a series of disks for test. Each disk drops by gravity from the vacuum disk plate to a test position including a drive mechanism. The drive mechanism rotates the disk, in its disk jacket, at a predetermined rotational speed for testing. Each disk is tested and the test results are stored in memory. After testing, the disk is automatically sorted and moved to an output location based on the test results. The sorting is accomplished by dropping the tested disk into a motor driven shuttle which conveys the disk to the proper output location and drops the disk at that location.