How does an
entire lot go bad? Are you seeing an exorbitant amount of
bad sectors after a format?
The most handy machine for testing these is a Linux box. Since these were
previously used on an Amiga, I need to do a low-level format before using
mformat. Here's the typical response:
# fdformat /dev/fd0u720
Double-sided, 80 tracks, 9 sec/track. Total capacity 720 kB.
Formatting ... done
Verifying ... Problem reading cylinder 62, expected 9216, read 2048
These disks were found in a box, not protected very well from dust. That
might have done it.
Is the drive (heads) clean? Try giving the drive a good cleaning before you
chuck the disks.
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: