Mathieu BOUCHARD

Sorry, I haven't used decb nor drivewire nor the CoCo since Sep 2018. But the Cocomax2 disk image has been all along in https://colorcomputerarchive.com/repo/Disks/Applications/Coco%20Max%20II%20%28Colorware%29.zip , and I just ran «od -Ax -tx1 "Coco Max II (Original).dsk"» and at position $13300 (FAT8 table) it shows FF padding.

Ok, more precisely, Toolshed seems to be confused by some non-conforming granule table sectors, that are padded with $FF instead of $00. In that case, it reports all those $FF as free granules when doing "decb free", therefore up to 256 free granules. HDBDOS and/or DECB ROM disagree about what it means. I did "decb dskini -h2 test.dsk" and then put $FF in the rest of the granule table sector, I used "decb copy" to put lots of files in that disk image and it overwrote so much of the 2nd disk image...

decb destroys disk images by inconsistent handling of image sizes