Bad Disk
From CPCWiki - THE Amstrad CPC encyclopedia!
Bad Disk (aka BD, BD04) is a CP/M disk utility that writes a [LOCKED].OUT file with blocks containing any bad sectors. The disk can then still be used in a normal manner. Unlike FBAD it also shows the names of any files that were affected.
BD v04 works equally well on either CP/M v2.2 or v3.0.
