Xen users - Jul 2006 - understanding DomU disk=?? root=?? for WindowsXP.

Hi;

	I''m having trouble understanding the config file for
	setting up my Windows install.

	I keep getting stuck on the disk= line and also
	on whether I need the root= line, and if so what
	do I put for it.

	Below is my current file..

----start----
kernel = "/boot/vmlinuz-2.6.17-1.2157_FC5xenU"
builder = ''linux''
memory = 1024
name = "WinXP"
vcpus = 1
disk = [ ''file:/mnt/images/WinXP.img,ioemu:hda,w'' ]
cdrom=''/dev/hda''
ne2000=0
boot=''d''
----- end -----

	When I try to start it, I get the following error.

VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)


-- 
Thanks.
Trevor..
Hugs to all, To those that need them,
and especially to those that don''t.
====================================E-Mail:    trevor@tspoon.com.au
Webpages:  http://www.tspoon.com.au/
====================================

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> -----Original Message-----
> From: xen-users-bounces@lists.xensource.com 
> [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of 
> Trevor furnell
> Sent: 28 July 2006 14:48
> To: xen-users@lists.xensource.com
> Subject: [Xen-users] understanding DomU disk=?? root=?? for WindowsXP.
> 
> Hi;
> 
> 	I''m having trouble understanding the config file for
> 	setting up my Windows install.
> 
> 	I keep getting stuck on the disk= line and also
> 	on whether I need the root= line, and if so what
> 	do I put for it.
> 
> 	Below is my current file..
> 
> ----start----
> kernel = "/boot/vmlinuz-2.6.17-1.2157_FC5xenU"
> builder = ''linux''
> memory = 1024
> name = "WinXP"
> vcpus = 1
> disk = [ ''file:/mnt/images/WinXP.img,ioemu:hda,w'' ]
> cdrom=''/dev/hda''
> ne2000=0
> boot=''d''
> ----- end -----
Hmm - you got a few things wrong int here, didn''t you? ;-)

Try using the /etc/xen/xmexample.hvm as a base, instead of one of the
paravirtual ones.. 

So, you want kernel to have ".../hvmloader", as that''s the
"application"
that loads the BIOS and gets things started. 

Is your CDROM really /dev/hda?

Here''s a simple "boot from CDROM" config file:

import os, re
arch = os.uname()[4]
if re.search(''64'', arch):
    arch_libdir = ''lib64''
else:
    arch_libdir = ''lib''
kernel = "/usr/lib/xen/boot/hvmloader"
builder=''hvm''
memory = 1024
name = "CDROM-boot"
vif = [ ''type=ioemu, bridge=xenbr0'' ]
disk = [ ''file:/root/disk.img,ioemu:hda,w'' ]
device_model = ''/usr/'' + arch_libdir +
''/xen/bin/qemu-dm''
cdrom=''/root/isoguest.iso''
boot=''d''
sdl=0
vnc=1
vncviewer=1
serial=''pty''
ne2000=0

I hope this helps. 

--
Mats



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