I uploaded Barry's ipfs to my user upload folder all renamed TOSEC style with a readme quoting what Keir wrote above.
Quote:
The diamond-shaped flux pattern for which the DM protection is infamous cannot be represented in an IPF.
Instead the generated IPF instead uses very short (1-2 bitcell) weak regions to simulate the fuzzy most-significant bit in each data byte in the protection sector.
Not a problem for an emulator to randomise one or two bits; but impossible to write to disk without being smart enough to swap back in something like the "diamond flux" trick.
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@TCD
I upped three ipfs yesterday, these will be supported in disk-analyse once Abaddon pushes his update to disk-utilities git repo.
All tested and verified working 100%.