From: javickers at solutionengineers.com> > Hi
guys...> > I have a truly huge number of old 3.5" HD floppy disks which no
longer work.> Attempting to format them in DOS returns the largely unhelpful
"Invalid> media or Track 0 bad - disk unusable" error message.> >
I'm guessing it's because these disks are old (pushing on for 20 years in> some
cases, and I'm fairly sure they're *all* over 10 years), and they've
Hi
I've seen case where if the disk has had an error on track
0, you can not even reformat using the format tool. The tool
is too smart.
In some case, I've taken a small maget and dragged it along
the surface of the disk to remove all of the original format.
It needs to make contact with the surface so you need a
method of rotating the disk inside the case.
Avoid scratching or denting the surface or it will be useless.
The other possible problem is that there is something on your
drives head that is scratching the magnetic material off.
If you've not cleaned the heads in some time, don't blame the
disk.
There are some disk that others have reported to have failed
but I've personally never seen one to fail without cause. The
most common on 3.5's is contamination of dirt from carrying
around in pockets. Next is dirty heads. I've even seen oily
fingers from small children.
If the surface is being removed, the heads will surely need
cleaning.
Dwight
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