[Coco] Recovering Data from Bad Disks

[Jayeson Lee-Steere]

Luis,

That looks interesting. I don't think my PC has a floppy controller in it,
but I will look into it if all else fails. I suspect that the situation is
so grim that I will need to take partial sectors where I can get them.

- Jayeson

On Sun, Feb 24, 2013 at 11:15 PM, Luis Fernández <luis46coco at hotmail.com>wrote:

> Hi
> In : http://www.nitros9.org/howto.html There is a utility called
> cocodisk, reading bad sectors and marks them with & HEB
> If you read the original and the support I could easily place the good of
> the two sectors together
>
>
>
> ---------------------------------------------------------------------------------
> Making  CoCoDskUtilPack V 1.1.3A.zip, Scan magazines and organize
> maltedmedia
> http://cococoding.com/cocodskutil/ Thank Aaron Wolfe
> http://www.tandycoco.com Thank Brian Blake and Stephen Fischer
> My personal blog: http://www.luis45ccs.blogspot.com,
> Excuse my English, I use google translator, my language is Spanish, I'm
> Spanish but I live in Venezuela
>
> ---------------------------------------------------------------------------------
>
> > Date: Fri, 22 Feb 2013 15:21:47 +0800
> > From: cocolistemail at titaniumstudios.com
> > To: coco at maltedmedia.com
> > Subject: [Coco] Recovering Data from Bad Disks
> >
> > 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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>
>
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