Epson Progression U12 - Manual (Page 143)

Destructive
surface analysis
tests the entire
disk for read/write errors or unflagged bad tracks and
updates the defective track table. Because this option
writes and reads data on the disk, it destroys all data on
any track that produces an error. You cannot run this test
on a disk that has never been formatted
Non-destructive surface analysis
checksthe
disk for unflagged bad tracks without destroying data.
You cannot run this test on a disk that has never been
fatted.
Formatting a New Disk
To format a new hard disk that has never been formatted, select
the Format option. You may need to modify the defective track
table to add bad tracks when you format the disk. Many hard
disk drives come with a printed list of bad tracks, but the bad
tracks are not flagged on the disk. Other hard disks (such as
Epson disks) come with the bad tracks already flagged.
Reformatting a Used Disk
To reformat a disk you have been using follow these steps:
1.
2.
3.
4.
Use the Nondestructive surface analysis option to check for
unflagged bad tracks.
If errors occur during the Nondestructive surface analysis,
back up your hard disk to diskettes.
Run the Destructive surface analysis option to update the
defective track table.
Run the Format option to format the disk.
Formatting a Hard Disk 6-3