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DateMon, 6 Jul 2009 20:57:20 +0100
FromJamie Lokier <>
SubjectRe: [PATCH] Added CONFIG_VFAT_FS_DUALNAMES option
Alan Cox wrote:
> From the funnies we've had in the past with FAT my gut impression is
> there are only a few implementations out there. Psion seems to have their
> own but most of the rest behave remarkably similarly which makes me
> suspect they all licensed a tiny number of implementations (DRDOS one
> perhaps ?). If we can keep most of those devices mounted 8.3 we nicely
> sidestep the issue anyway.

From recently witnessing someone write another FAT implementation, for
an 8-bit AVR microcontroller reading SD cards, based in part on
someone elses public domain FAT implementation, fixing significant
bugs in that (including directory parsing), and then seeing it
translated from C to hand-coded AVR assembly language to save space,
with me helping teach C to the person doing it, for a commercial
product which is to be released in the next couple of months, and will
be updated with SD cards written by Linux and Windows...

From witnessing that, for one obscure product among millions, I'd
guess there are more FAT implementations than a "few". Perhaps there
aren't many VFAT implementations, but my gut says there are quite a
lot of independently written 8.3-only FAT ones.

-- Jamie


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