Epson Equity Ie Q50188015-1 - Manual (Page 108)

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, however, 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 this message:
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 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, consult your dealer.
Read, verify check
This test reads and verifies data from all tracks of the disk, checking each
cylinder and using all heads.
Select option 3 from the menu to start this test. The program displays the
number of each cylinder it finds. For example, with a 20MB hard disk, the
first message you see is:
Current cylinder is 614
D-20 Performing System Diagnostics