Performing the Tests

The diskette Format test checks the format capability of the diskette drive and its controller. In order to run the test, you need a blank diskette that has been formatted using the MS-DOS FORMAT command and that is not write-protected. When the program prompts you to insert a diskette, insert the newly formatted one.

Once the Diskette format test is completed successfully, you must use the test diskette to run any of the tests in the following table. These tests will not run properly unless the diskette has been previously used for the Diskette format diagnostic test.

Tess requiring a specially formatted diskette

Test

Drive speed test

Random R(ead)/VV(rite) test

Sequential R(ead)/W(rite) test

Drive change line test

Function

Verifies how fast the diskette drive rotates a diskette. A 1.2MB, W-inch diskette drive should rotate a 1.2MB diskette at 360 RPM and a 360KB diskette at 300 RPM. A 1.44MB, 31/2-inch drive should rotate a diskette at

300 RPM. (Tolerance allowed: one percent.)

Checks the random seek capability of a diskette drive by performing a random read/write operation.

Checks the sequential seek capability of a diskette drive by performing a sequential read/write operation.

Tests the status of the disk change line that detects when you insert or remove a diskette from a drive.

Performing System Diagnostics

C-21