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2022-09-10 05:36

ws

Registered: Apr 2012
Posts: 249

Repair/Retrace Floppy Image

I read it somewhere here out of the corner of my eye that someone recently released a tool that tries to follow block chains on a floppy image that is broken and tries to piece together what is possible to reconstruct.

I would really love to try that tool because i have an image of a floppy that contains files that would be great to look at, even if parts of it were broken.

Currently the files cannot even be loaded (actual read error) and for very very difficult reasons i cannot try and read the image again, though i believe i got the best dump of it.

Any ideas?

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2022-09-11 07:25

ws

Registered: Apr 2012
Posts: 249

After 8 reads with 3 drives, of which one is luckily a surprisingly sturdy 1570 and a 1541 that seems to be able to read a slice of sausage, errors are down to 2%! I had to use a combination of PyD64Fix and manually exchanging semi-defective blocks in dirmaster BAM edit, though. Dirmaster is really a gift from heaven.
I'd mark this solved now. If there is any interest, i can elaborate later.

2022-09-12 06:00

zzarko

Registered: Feb 2003
Posts: 72

@ws: I had no idea PyD64Fix did not work with newer setups (I haven't made any backups since 2021, that is the last time I had some "new" disks and last time I updated the code, using Ubuntu 18.04). Anyhow, if you still need it, I just made changes to make it PySide2+Python3 compliant (tested with Python 3.10), you can try this version from here:

https://8bitchip.info/oub/Commodore/pyd64fix.py

2022-09-12 09:44

ws

Registered: Apr 2012
Posts: 249

hi zzarko, thank you!!!
Your update works fine with even python 3.7 and PyQt was replaced by Pyside?
Thanks alot!

I even sort of have a feature request, make the "different block" blue blocks clickable so one can select which parts of the block(s) to actually use, but i can also do it manually in DirMaster: I would make the best possible image-version with pyd64fix, but note that there are other blocks on the other images, that could be salvaged, then i open all the needed disk images simultanously in DirMaster, and via BAM edit i view the Block contents and "guess" what content could fit the best and copy that from the Hex view.

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