From: Gleb Natapov <gleb@redhat.com>
To: Minoru Usui <usui@mxm.nes.nec.co.jp>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Boot order problem
Date: Mon, 25 Jul 2011 12:09:31 +0300 [thread overview]
Message-ID: <20110725090931.GV3044@redhat.com> (raw)
In-Reply-To: <20110725164458.267a8197.usui@mxm.nes.nec.co.jp>
On Mon, Jul 25, 2011 at 04:44:58PM +0900, Minoru Usui wrote:
> On Sun, 24 Jul 2011 09:30:49 +0300
> Gleb Natapov <gleb@redhat.com> 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.
> 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 <usui@mxm.nes.nec.co.jp>
--
Gleb.
next prev parent reply other threads:[~2011-07-25 9:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-22 0:51 [Qemu-devel] Boot order problem Minoru Usui
2011-07-24 6:30 ` Gleb Natapov
2011-07-25 7:07 ` Minoru Usui
2011-07-25 9:06 ` Gleb Natapov
2011-07-26 1:07 ` Minoru Usui
2011-07-25 7:44 ` Minoru Usui
2011-07-25 9:09 ` Gleb Natapov [this message]
2011-07-26 1:00 ` Minoru Usui
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