Epson Equity Ie Q50188015-1 - Manual (Page 102)

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 track on the diskette,
starting at the center. Select option 3 from the menu to start this test.
Note
This test destroys all data on the diskette in the selected drive. If you are
testing drive A, you need to remove your Reference diskette from the drive
and replace it with a blank, formatted diskette.
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 this
message:
Use only a formatted blank diskette for this
test. Any data present may be erased.
If using drive A, remove your Reference Disk.
Enter Y to start this check.
Enter N to return to the menu.
Make sure you have a blank, formatted diskette in drive A, then press Y
and Enter.
The program displays the current track number as each cylinder is tested.
With a 720KB diskette, the first message you see is:
Current track is 79
D-14 Performing
System
Diagnostics