Disk testing apparatus, disk testing method, computer-readable recording medium that stores a disk testing program, and disk apparatus including a disk to be tested

A disk testing method of setting a predetermined condition of a recording density for a disk apparatus, and conducting a test relating to at least readout of data stored in the disk apparatus, the disk testing method comprising:

• setting initially the predetermined condition of the recording density for the disk apparatus;
• conducting the test on the disk apparatus to which the predetermined condition is set;
• relaxing, 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
• re-conducting 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 relaxing includes relaxing 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.

A computer-readable recording medium that stores a disk testing program for setting a predetermined condition of a recording density for a disk apparatus, and conducting a test relating to at least readout of data stored in the disk apparatus, wherein the disk testing program makes a computer execute

• relaxing, 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
• re-conducting 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.

A disk apparatus on which a test relating to at least readout of data stored in the disk apparatus is conducted under a predetermined condition of a recording density set for the disk apparatus, wherein

• when a result of the test is unsatisfactory, a condition of the recording density currently set for the disk apparatus is relaxed to set a new condition of the recording density,
• the test is re-conducted on the disk apparatus under the new condition,
• the test includes at least one of an error rate test and a side erase test, and
• the condition of a recording density is relaxed:
• 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.