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Old 01 April 2019, 15:57   #25
lesta_smsc
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Quote:
Originally Posted by Jope View Post
Every second sector of certain disks has a broken sector header (IIRC there was an extra bit found there). We have no idea how these were written, perhaps they were copied in nibble mode with a machine with broken memory or something? Or perhaps just a buggy copier that worked at the MFM level for some reason.

trackdisk.device on a real Amiga can handle these incorrectly written disks, but the disk reads a lot slower than a disk with intact sector headers.
But if you are doing a raw dump then these incorrectly written sectors should also be dumped. Then a little tweaking may be able to get them working?

As far as I recall, if someone was to KF/SC dump a disk, it cannot be written back directly (or at least that's what someone with the hardware has told me) without some further adjustments. Maybe this is what dlfrsilver could shed more light/help on?
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