Epson 386 User's Guide download pdf (Page 235)

The formatting options work as follows:

Format first scans the disk (if it has no defective track

table) for defective (bad) tracks and lets you decide which

tracks to mark as bad. Then the program formats the disk

and marks those bad tracks so they are never used to store

data.

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 the Destructive

surface analysis on a disk that has never been formatted.

Non-destructive surface analysis checks

the disk for unflagged bad tracks without destroying data.

You cannot run the Non-destructive surface analysis on a

disk that has never been formatted.

The type of format you choose depends on whether you are

reformatting a disk that has been used or formatting a new disk

for the first time. See the recommendations below.

Reformatting a Used Disk

If you are reformatting a disk you have been using that appears

to be damaged, follow these steps:

Use the Non-destructive surface analysis test to check for

unflagged bad tracks.

If errors occur during the Non-destructive analysis, use

BACKUP to back up the data on your disk. (See your

MS-DOS Reference Manual for instructions on how to use

BACKUP.)

3. Run the Destructive surface analysis.

Physically Formatting a Hard

Disk

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Epson 386 User's Guide Page 235