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RE: [Xen-devel] XP: VBD could not connect to backend device:USB boot

To: "Mark Williamson" <mark.williamson@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] XP: VBD could not connect to backend device:USB boot
From: "Kaushik Barde" <Kaushik_Barde@xxxxxxxxxxx>
Date: Sun, 11 Mar 2007 20:51:49 -0700
Cc: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
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Thread-topic: [Xen-devel] XP: VBD could not connect to backend device:USB boot
Thanks guys.

But no luck. I did try removing both 'ioemu' and '

Error: Device (769) could not be connected. Backend devices not found.

Still is the problem.

I have attached Xen start-up log, xm file along with this email...

My kernel is 2.6.16-33, Xen-3.0.3/3.0.4.. If that helps..

Note, I am booting from a USB/LILO combo and not from the hard-disk...

I do have enough loop devices, compiled into the kernel..



-----Original Message-----
From: M.A. Williamson [mailto:maw48@xxxxxxxxxxxxxxxx] On Behalf Of Mark
Sent: Saturday, March 10, 2007 12:54 PM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: Kaushik Barde; Petersson, Mats
Subject: Re: [Xen-devel] XP: VBD could not connect to backend device:USB

Well, as Mats said, it would seem that some fundamental setup is
somewhere.  Gosh, that does sound a bit vague of me, sorry!

I take it you've checked the disk images (e.g. /root/xenimages/hd.img)
mounted at the correct positions.  You don't need the ioemu: syntax
so try removing that.

Finally, you could try removing the CDROM argument to simplify the
although this shouldn't make a difference! (I don't believe the problem
with the CD-ROM itself - the error suggests hda can't connect).

I'm sorry I don't have anything more specific to suggest right now - but
looks like it ought to be fixable, anyhow.  Hopefully we can figure it


On Friday 09 March 2007 17:16, Kaushik Barde wrote:
> Thanks Mats,
> We also tried looking at xm logs but could not see anything obvious.
> Attached are our hvm files..
> Please advise..
> Best.
> -Kaushik
> -----Original Message-----
> From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx]
> Sent: Friday, March 09, 2007 8:53 AM
> To: Kaushik Barde; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] XP: VBD could not connect to backend
> boot
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> > Kaushik Barde
> > Sent: 09 March 2007 16:48
> > To: xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-devel] XP: VBD could not connect to backend
> > device: USB boot
> >
> > Hi:
> >
> > we have following setup:
> >
> > 1. 2.6.16-33-based Xen 3.0.3/Xen-3.0.4 DOM-0 kernels.
> > 2. Using LILO-mbootpack from USB we boot Xen-->DOM-0 setup
> > 3. We mount harddisk and try to install xp.hvm
> >
> > While,we are successful with FCs as DOM-U, for XP we get, VBD
> > (768) could not be connected.
> But there's obviously something else wrong, as the conection of the
> happens LONG before the OS is loaded, so the fact that you're using XP
> doesn't make any difference at all.
> Can you post a configuration file for the XP domain (strip comments
> empty lines please).
> --
> Mats

Dave: Just a question. What use is a unicyle with no seat?  And no
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

Attachment: winxp_WORK_PART.xm
Description: winxp_WORK_PART.xm

Attachment: xm.log
Description: xm.log

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