When you finish running the floppy disk drive check, press 0 and Enter to return to the OPERATION MENU.

Sequential seek check

This test checks the ability of the read/write heads to locate any part of the diskette. This action by a read/write head is called a seek. During this test, each head seeks sequentially from the innermost track to the outermost track. The innermost track is track 79 for 720KB diskettes and track 39 for 360KB diskettes.

Select option 1 from the menu to start this test. The

program displays the number of each track it finds, counting down from 79 or 39 to 0.

The seek is performed by each head, so you see the count twice. If no errors occur, the menu is displayed.

Random seek check

This test is identical to the sequential seek check, except that the seek operation is performed on each track in random order instead of sequential order. Select option 2 from the menu to start this test.

Write, read check

This test checks the ability of the selected disk drive to read and write data from a diskette. The test writes to and reads from each cylinder on the diskette, starting at the center.

Note

This test destroys all data on the diskette in the selected drive.

Select option 3 from the menu to start this test.

If you have only one diskette drive, you are prompted to replace the reference diskette with a blank diskette before running the test. You see the following messages.

Performing System Diagnostics

D-15