Am Sonntag, den 09.11.2008, 19:11 +0000 schrieb Scott Ashcroft:
> Package: grub-common
> Version: 1.96+20080724-11
> Severity: important
>
>
> grub-probe misdetects the root fs of one of my PCs (works fine on all others).
>
...
>
> It looks like grub-probe runs the FAT checks before the EXT2 check and I just
> happen to hit a false positive.
>
> Hopefully 512 bytes of the partition should be enough to debug this?
>
> sa:/# hexdump -Cn 512 /dev/sda1
> 00000000 eb 4a 90 00 65 6c 6c 20 38 2e 30 00 02 04 01 00 |.J..ell 8.0.....|
> 00000010 02 00 02 00 00 f8 4f 00 3f 00 ff 00 3f 00 00 00 |......O.?...?...|
> 00000020 86 39 01 00 80 00 29 09 08 d6 07 44 65 6c 6c 55 |.9....)....DellU|
> 00000030 74 69 6c 69 74 79 00 41 54 31 36 20 20 20 00 00 |tility.AT16 ..|
^^^
Seems like you had a FAT filesystem there.
If I make a 1 MB file and format it with mkfs.vfat then I have exactly
at the same place FAT12
If I then format the file with mkfs.ext2 the first 512 byte get zero'ed.
So I wonder why you still have a FAT header in there.
Maybe we could check if bpb.fstype contains FAT12/FAT16/FAT32, then this
would solve the problem for you but I don't know if it would introduce
one for others.
--
Felix Zielcke
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