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Old 28 July 2019, 22:45   #7
mark_k
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Join Date: Aug 2004
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With DiskSpare, you could format disks with 80 or 82 tracks. If your mount file is for 80 tracks you won't be able to read 82-track-formatted disks. You'd need to edit the mount file to have HighCyl=81 in order to read 82-track disks. And vice versa.

Also you could use a disk editor like DiskX to see the raw data on each disk, maybe that could give some clues as to which filesystem/backup program you used?
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