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Re: [Qemu-devel] Tiny compliance bug in `block-vvfat.c'


From: Thiemo Seufer
Subject: Re: [Qemu-devel] Tiny compliance bug in `block-vvfat.c'
Date: Sun, 1 Apr 2007 19:18:45 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

Thomas Schwinge wrote:
> [I'm not subscribed to the mailing list, so please keep me cced.]
> 
> 
> Hello!
> 
> We kept wondering why the GNU/Hurd's `fatfs' translator (think Unix
> kernel file system driver) didn't want to ``eat'' the QEMU vvfat
> on-the-fly served floppy images (created from a directory structure using
> ``-fdb fat:floppy:some/where'') until we finally traced it down to a tiny
> QEMU bug in the said vvfat code -- see the following patch.  That
> translator kept telling us that it had expected the file system image to
> be as twice as big as it actually was.
> 
> Handling such images was no problem for GNU GRUB and the Linux kernel,
> but it seems that the GNU/Hurd's fat file system implementation is more
> obeying to standards.  (Now, is that good or bad?  ;-)

It's bad AFAICS. 36 sectors is the right value for a 2.88 MB floppy.


Thiemo




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