Epson Y16499100301 - Manual (Page 125)

If you specified to run the hard disk drive check multiple
times, this menu does not display and only the first three tests
are performed.
Seek check
This test checks the ability of the read/write heads to
locate any part of the hard disk. This action by a read/write
head is called a seek. During this test, each head seeks each
cylinder of the disk in sequence, starting from the center.
Select option 1 from the menu to start this test. The
program displays the number of each cylinder it finds, counting
down from 614 (for a 20MB hard disk) to 0.
The seek is performed by the read/write heads
simultaneously, so you see the cylinder numbers only once. If
no errors occur, the menu is displayed.
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
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.
Performing System Diagnostics
D-21