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Message-ID: <445FC4ED.6090508@blenke.com>
Date: Mon, 08 May 2006 18:23:41 -0400
From: "Ian C. Blenke" <ian@blenke.com>
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Subject: Re: [Qemu-devel] Re: qemu disk on vfat
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To: qemu-devel@nongnu.org

Yann Le Doar=E9 wrote:

>You are right ! :
>
>sh-2.05b# qemu-img create /mnt/partitions/windows0/qmeu-disk 4M
>Formating '/mnt/partitions/windows0/qmeu-disk', fmt=3Draw, size=3D4096 k=
B
>sh-2.05b# ls -al /mnt/partitions/windows0/qmeu-disk           =20
>-rwxr-xr-x    1 root     root            0 2006-05-09
>23:37 /mnt/partitions/windows0/qmeu-disk
>sh-2.05b# qemu-img create /mnt/partitions/windows0/qmeu-disk 40M
>Formating '/mnt/partitions/windows0/qmeu-disk', fmt=3Draw, size=3D40960 =
kB
>sh-2.05b# ls -al /mnt/partitions/windows0/qmeu-disk            =20
>-rwxr-xr-x    1 root     root            0 2006-05-09
>23:38 /mnt/partitions/windows0
> =20
>

FAT filesystems don't do sparse files (files with "holes" in them).

The qemu-img "raw" option attempts to create sparse disk images.

Create the image on a filesystem that does support sparse files and then=20
_copy_ those sparse files to a FAT filesystem and they'll work just fine.

 - Ian C. Blenke <ian@blenke.com> http://ian.blenke.com/