Here's what you need to do to get reliable results from Apple drives:
And I am probably a good test of real world abuse to
the Apple Drive ][
drives, as I was just a wee child, and I didn't follow any rules that I
probably should have. (I always put the disk in the drive, closed it, and
turned on the computer... I would pull disks out, and replace them while
the drive was reading or writing, I would power off the computer or reset
it during read/write, I didn't use dust sleaves, I touched the disk media
directly, wrote with ball point pens on the disk labels AFTER putting
them on the disk, I used cheap no name brand bulk disks of any kind, and
used a hole punch to make them double sided... and at one point, even
stapled a peice of paper to a disk... and that staple is the ONLY time I
can think of that I screwed up a disk... two holes and a long dent will
do that. So I would have to say, the Apple II disk system was pretty
freakin' stable and reliable to put up with all my abuse)