Xen users - Aug 2007 - Dumping a partition instead of the whole disk ?

Hi,

I would like to know if there is a way to dump a partition
instead of the whole disk

so i would like to do
dd if=/dev/hda1 of=hda1.img

instead of 

dd if=/dev/hda of=hda.img

And run it on xen after


Note : when i dump the whole disk the Windows XP 
run pretty well with this modifications before dumping :
http://support.microsoft.com/kb/314082/

I could create an empty disk create a partition with the same size and 
dd if=hda1.img of=/dev/hda1 under xen with a boot rescue dsk but i
don''t if it
will work...

But is there an other/easier way to do that ?

Have a nice day,
--
Virer


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On Wednesday 08 August 2007, Sebastien Caps wrote:
> Hi,
>
> I would like to know if there is a way to dump a partition
> instead of the whole disk
>
> so i would like to do
> dd if=/dev/hda1 of=hda1.img
>
> instead of
>
> dd if=/dev/hda of=hda.img
>
> And run it on xen after
i guess it''s on the QEmu side, but it would be _very_ nice to have some
way to
create a disk image with only the partition table, and the partitions 
themselves would be on separate files.

something like:

; first get some partitions from different places:
dd if=/dev/hda1 of=hda1.img
dd if=/dev/hdb2 of=hda2.img
; then build a partition table
qemu-img-partition hda1.img hda2.img -o hda.img

and then use only hda.img. it would appear as a read-only partition table, and 
the partitions would be stored on the other image files.

hum... does anybody here know enough of the qcow format to tell if it''s
possible without new code on the emulator layer?

-- 
Javier


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