The mbadblocks command is used to scan an MS-DOS floppy and mark
its unused bad blocks as bad. It uses the following syntax:
Mbadblocks scans an MS-DOS floppy for bad blocks. All unused bad
blocks are marked as such in the FAT. This is intended to be used right
after mformat. It is not intended to salvage bad disks.
Mbadblocks should (but doesn't yet :-( ) also try to salvage bad
blocks which are in use by reading them repeatedly, and then mark them
bad.
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