Patent ID: 7248040

Claim:
A disk testing apparatus that sets a predetermined condition of a recording density for a disk apparatus, and conducts a test relating to at least readout of data stored in the disk apparatus, the disk testing apparatus comprising: a condition relaxing unit that relaxes, when a result of the test is unsatisfactory, a condition of the recording density currently set for the disk apparatus to set a new condition of the recording density; and a re-testing unit that re-conducts the test on the disk apparatus to which the new condition is set, wherein the test includes at least one of an error rate test and a side erase test, and the condition relaxing unit relaxes the condition of a recording density: in a direction of circumference of a disk, when the result of the test is unsatisfactory only in the error rate test; in a direction of radius of the disk, when the result of the test is unsatisfactory only in the side erase test; and in the direction of circumference of the disk, when the result of the test is unsatisfactory in both the error rate test and the side erase test.