Interestingly the other math does not add up either. 386,560 bytes used, and 1,167,872 bytes free would mean the disk has a total of 1,554,432 bytes and not the 1,213,952 bytes reported.

So you have 4Gb of bad sectors, and around 1.5Mb of useable space on a 1.2Mb floppy.

It's pure magic!

March 08, 2026 - 01:19 UTC

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The math works fine; include a total space of -340,480 bytes worth of bad sectors into the total. 😊

(Incidentally, this probably means that the one bad sector that got run into is on track 2, head 1. I could probably math out which sector if I bothered looking at the FAT16 specs.)
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