Epson LT-286 - Manual (Page 150)

Even if you run the test fur only a short time, your printer may
store many characters in its memory. To stop printing, take the
printer off-line and then turn it off.
Hard Disk Drive and Controller Check
Use this option to test the performance of the hard disk drive
installed in your computer. If any errors occur, have your dealer
check and service the drive.
WARNING
As a precaution against losing data on your hard disk, you should
back up your hasd disk before running these checks.
When you select option 17 from the DEVICE LIST, you see this
menu:
HARD DISK DRIVE AND CONTROLLER CHECK MENU
1 - Seek check
2 - Write, read check
3 - Read, verify check
4
- Run all above check
0 - Exit
Enter selection number:
Press the number corresponding to the
test
you want to run and
press Enter. When you are finished with all checks, press 0 and
Enter to return to the DEVICE LIST menu.
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 innermost cylinder.
Performing System Diagnostics D-25