From: Gleb Natapov <gleb@redhat.com>
To: Martin Kraus <martin.kraus@wujiman.net>
Cc: kvm <kvm@vger.kernel.org>
Subject: Re: grub booting from virtio but can't see virtio disks
Date: Sun, 8 Aug 2010 14:39:59 +0300 [thread overview]
Message-ID: <20100808113959.GA26245@redhat.com> (raw)
In-Reply-To: <20100807153114.GA8631@/bin/hostname>
On Sat, Aug 07, 2010 at 05:31:16PM +0200, Martin Kraus wrote:
> On Tue, Aug 03, 2010 at 08:58:59AM +0300, Gleb Natapov wrote:
> > On Mon, Aug 02, 2010 at 09:05:48PM +0200, Martin Kraus wrote:
> > > Hi. I've been wondering why grub can boot from a virtio device but can't see
> > > virtio devices. I wanted to have a generic disk which would have a bios
> > > partition with grub modules and this would include grub.cfg from a second disk.
> > > I could use this image to boot all my virtual linux machines without the need
> > > to have a partition on a logical volume. This way I have a separate virtio
> > > boot lv with partitions and it works fine. It just doesn't seem as nice and I'm
> > > curious if there is a way to get it to work, meaning if for example using efi
> > > or some other kind of bios for qemu or grub module would help it.
> > >
> > What is your qemu version and qemu command line?
>
> debian squeeze 0.12.4
>
> kvm -cpu host -drive file=/dev/mapper/virtual-ctech_boot,boot=on,if=virtio,cache=none -drive
> file=/dev/mapper/virtual-ctech,if=virtio,cache=none
>
> virtual-ctech_boot is partitioned and mounts as "/boot" in the virtual guest and virtual-ctech is not
> partitioned and is mounted as "/".
>
> This works fine but grub sees only the virtual-ctech_boot from which it is
> booting. From that I see it is possible to access virtio devices at boot time but
> somehow the bootdisk is different from the other disk.
>
> I have to set if=ide for virtual-ctech for grub to be able to see it.
>
Can you try to use latest seabios and see if it changes something?
You can get seabios here git://git.linuxtogo.org/home/kevin/seabios.gi
To tell qemu to use specific bios image use -bios flag.
> Is it possible to see all the virtio disks in grub or am I just out of luck?
>
> thanks
> mk
--
Gleb.
next prev parent reply other threads:[~2010-08-08 11:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-02 19:05 grub booting from virtio but can't see virtio disks Martin Kraus
2010-08-03 5:58 ` Gleb Natapov
2010-08-07 15:31 ` Martin Kraus
2010-08-08 11:39 ` Gleb Natapov [this message]
2010-08-08 16:14 ` Martin Kraus
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