Epson 4SLC2-50 - Manual (Page 91)

Caution
The hard disk format procedure destroys any data on your hard
disk.
Select the Hard Disk Format option only when you need to
perform a low-level format of the hard disk. You see this screen:
The Mark Bad Tracks option allows you to specify the bad
tracks on the hard disk. If you do not enter a bad track list before
you format the disk, the format program analyzes the surface of
the hard disk to determine the bad tracks.
Auto Interleave
This option is provided for service personnel only. You should
never select this option. Using it incorrectly could damage the
drive.
Media Analysis
This test identifies the bad tracks on the hard disk by analyzing the
surface of the disk to find them. You should not select this option
unless advised to do so by an authorized Epson representative.
Caution
The Media Analysis test destroys any data on your hard disk.
Running Setup 5-15