Epson 10020, 100 Therefore, data created by MS-DOSis not destroyed, Note, Write, Read Check, diagnostics, and is never used for storage by MS-DOS

Write, Read Check

This check tests the ability of the hard disk drive to read and write data. The test writes to and reads from each sector of the innermost cylinder of the disk, using each head.

Note

This test destroys all data on the innermost cylinder of the

selected hard disk drive. This cylinder is reserved for

diagnostics, and is never used for storage by MS-DOS.

Therefore, data created by MS-DOS is not destroyed.

Select option 2 from the menu to start this test. You see these messages:

The data on the highest physical cylinder may be destroyed by this check.

Enter Y to start this check. Enter N to return to the menu.

Press Y and then Enter to continue with the test. You do not see a cylinder count during the test. If no errors occur, the program returns to the menu.

If an error is reported, make a note of the code and message. Then use the Non-destructive surface analysis (option 4 on the HARD DISK FORMAT MENU) to check the condition of the hard disk. If this analysis shows no other problems with the disk, follow these steps:

1.Rack up all the files on your hard disk with the BACKUP command, described in your MS-DOS Reference Manual.

2.Re-format the disk using option 2, Format hard disk, on the OPERATION MENU. See Appendix E for instructions.

3.Prepare the hard disk for use with FDISK and SELECT. See Appendix F for instructions.

Performing System Diagnostics D-33