[Coco] Recovering Data from Bad Disks

[Aldo Lagana]

Not trying to state the obvious, but have you tried 'cleaning' any of your 'bad' disks?
I have had luck with isopropyl, q-tips and patience.  My 'bad' disks were stored in humid conditions and had obvious 'foxing' or white visible streaks on the surface.
 
On Feb 22, 2013, at 2:21 AM, Jayeson Lee-Steere <cocolistemail at titaniumstudios.com> wrote:

> I have a lot of old Coco disks and now that I have my Coco set up, I'm in
> the process of extracting the data off them. I am running Drivewire 4 in
> HBDOS mode and BACKUP 0 TO n creates a .DSK per physical disk which is
> exactly what I want.
> 
> However, many of them are bad, including everything that has any of my work
> on them. I do however have a backup disk for everything, but those two have
> a lot of bad disks too. I was thinking that if I extracted what I could
> from both versions and hex-diff the .dsk images, I should be able to
> recover a lot. I vaguely recall back in the day that there was software
> that would allow ignoring (checksum?) errors during copy and often you'd
> end up with only one bad byte. I have no idea what that was though. Does
> anyone know what I'm talking about?
> 
> Another option would be to write something myself that uses DSKCON as it
> would allow me to log out additional info such as which sectors were bad. I
> have a vague recollection though that the DSKCON routines don't give any of
> the sector data on error?
> 
> - Jayeson Lee-Steere
> 
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