Re: [Qemu-devel] Boot order problem

[Minoru Usui]

On Mon, 25 Jul 2011 12:09:31 +0300
Gleb Natapov <address@hidden> wrote:

> On Mon, Jul 25, 2011 at 04:44:58PM +0900, Minoru Usui wrote:
> > On Sun, 24 Jul 2011 09:30:49 +0300
> > Gleb Natapov <address@hidden> wrote:
> > 
> [skip]
> 
> > I tested another one about <boot order> case on RHEL6.1, and I also faced 
> > another problem.
> > 
> > VM has two virtio HDD. HDD1 is installed RHEL6.1, HDD2 is empty.
> > I specified boot order to HDD1:1, HDD2:2, VM booted up from HDD1,
> > but boot order HDD1:2, HDD2:1 case, VM couldn't boot up from HDD2.
> > (It searched CD-ROM, NIC(gPXE), and finally stopped booting.)
> > 
> That's BIOS specification limitation. BIOS can't fall back from one HDD
> to another, so only HDD with lowest priority among all HDDs will be tried.

Thank you for explanation.
I understand.

> > It seems seabios searches only 1 device per device list(HDD, CD-ROM, NET, 
> > FLOPPY).
> > Is it true?
> No, it searches only one HDD. Other devices do not have this limitation
> IIRC.
> 
> > 
> > <boot order> can specify per device, so shouldn't seabios search all device,
> > even if it specifies multiple device per device list?
> > 
> > -- 
> > Minoru Usui <address@hidden>
> 
> --
>                       Gleb.


-- 
Minoru Usui <address@hidden>