RockFAT

RockFAT ('Rock-solid diskettes with error correcting codes') by Thanassis Tsiodras stores a file with parity recovery data directly on a floppy with no filesystem in a way that maximizes the ability to recover from burst sector errors

The Linux version creates a floppy image that can be written with dd while the Windows version writes directly to the floppy

It only supports a single file with a filename of less than 16 chars.

Each block contains 232 bytes of data + 24 bytes of parity, allowing the recovery of 12 bytes of data per block

Then the data is interleaved such that

(N=8 for this implementation)

Thus in the worst case, it can recover from 11 bad sectors and possibly more depending on how the damage is spread out

2880 sectors X 512 bytes X (232/256) = 1336320 bytes available - 4-byte stream length - 16-byte filename = 1336300 bytes per floppy

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