Virtio block device and LVM

Virtio block device and LVM

[Dennis Jacobfeuerborn]

Hi,
I'm trying to get the paravirtualized block device going but get in trouble 
with LVM. Both host and guest a very recent snapshot of Fedora 9 rawhide. 
The guest is a pristine F9 install with / mounted as /dev/VolGroup00/LogVol00.

When I boot with the command:
/usr/bin/qemu-kvm -m 512 -drive file=/root/test-1.img,media=disk,boot=on
the guest boots fine but when I try to boot with:
/usr/bin/qemu-kvm -m 512 -drive file=/root/test-1.img,if=virtio,boot=on
the kernel panics because it cannot find any volume-groups and thus not 
mount /.

Do I have to make any specific changes to the guest to make it 
recognize/detect the volume-group on the virtual block device?

Regards,
   Dennis

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Re: Virtio block device and LVM

[Anthony Liguori]

Dennis Jacobfeuerborn wrote:
> Hi,
> I'm trying to get the paravirtualized block device going but get in trouble 
> with LVM. Both host and guest a very recent snapshot of Fedora 9 rawhide. 
> The guest is a pristine F9 install with / mounted as /dev/VolGroup00/LogVol00.
>
> When I boot with the command:
> /usr/bin/qemu-kvm -m 512 -drive file=/root/test-1.img,media=disk,boot=on
> the guest boots fine but when I try to boot with:
> /usr/bin/qemu-kvm -m 512 -drive file=/root/test-1.img,if=virtio,boot=on
> the kernel panics because it cannot find any volume-groups and thus not 
> mount /.
>
> Do I have to make any specific changes to the guest to make it 
> recognize/detect the volume-group on the virtual block device?
>   

You need to make sure virtio_blk and virtio_pci are included in your initrd.

Regards,

Anthony Liguori

> Regards,
>    Dennis
>
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