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[Xen-users] SCSI driver clash with PV drivers

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] SCSI driver clash with PV drivers
From: "Iain J. Watson" <iain@xxxxxxxxxxxxxxx>
Date: Wed, 25 Feb 2009 16:32:58 +0000
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I am trying to boot a DomU system with two harddrives attached as hda
and sda. I can use hda fine as the boot disk, but when I add a second
disk as sda the DomU OS kernel panics on boot.

The DomU is using PV drivers for disk and network access inside a
fully virtualised (qemu-dm) instance. Also, I have disabled replies to
disk probes after the initial DomU BIOS check. This means the
underlying OS shouldn't be able to see the virtualised disks at all.

I disabled the sd_mod.ko driver inside the domU image and I am able to
boot the DomU in the way I want. Unfortunately it is not possible to
use this work-around in the majority of my planned environment.

I have also been able to get the DomU to boot by specifying the second
disk as xvda instead of sda and this also worked.

I can see plenty of examples of people using 'sda' as their device
name, but I cannot make this work for myself.

Any help at all on this would be very welcome.

"Just think how stupid the average person is,
and then realize that half of them are even stupider!"
--George Carlin

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