Epson 386/25 - Manual (Page 246)

To flag the error tracks as bad, select Y. You see a list of the
tracks as they are flagged and these messages:
Flagging bad tracks...
Cylinder is 237, head is 2
Press ENTER to return to the menu.
Press Enter to return to the Hard Disk Format Menu.
Option 3, Non-destructive Surface Analysis
The Non-destructive surface analysis does not destroy any data,
and you can use it to safely check the condition of your hard
disk drive. However, this test does not flag any bad tracks it
detects.
T o s t a r t t h e test, select 3-Non-destructive surface
analysis from the Hard Disk Format Menu. You see these
messages:
Analyze Hard Disk
Read/Verify check for all tracks...
Current cylinder
is nnnn
As the program checks each track, it counts the cylinder
numbers down to zero. When the test is complete, the program
displays a report on the status of the disk, such as the following:
Analysis finished.
C-12 Physically
Formatting a Hard Disk