Xen users - Jun 2006 - Kubuntu host running, guest win XP doesn''t start

Hi all,
I''m new to Xen and I''ve just spent two days trying to install
it. My
goal is to run Kubuntu on a laptop, with the ability to fire up Windows 
when I need some non-ported proprietary application, and occasionally 
boot windows natively to have ACPI or for some high performance windows 
application.

It seems that in order to launch Windows within Xen, I have to create a 
virtual disk, or disk image file. Is it right ?

If yes, does it mean that I won''t be able to run Windows natively ? Or 
I''ll have to have two copies of Windows, one in the disk image, one in 
it''s own partition. Not very handy (disk space, double configuration), 
besides possible license issues.

If no (that is, if I should be able to launch Windows within Xen from it 
current physical partition) could you please help me find what''s wrong
?
I have a D820 with Intel Core duo T2300 (and not T2300E which doesn''t 
have VT-x), I''ve enabled VT in the setup. I checked that root can 
connect to X server (typed xterm as root).
I untarred xen-3.0.2-src.tgz and ran make world; make install (I first 
tried binary install, same problem),
edited /boot/grub/menu.lst; mv /lib/tls /lib/tls.disabled; echo ""
>
/var/log/xend.log; reboot;
mkdir /var/run/xenstored
xend start

# xm create windows
Using config file "/etc/xen/windows".
Started domain windows
# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0     1024     2 r-----    40.4
windows                            1      512     1 -b----     0.0
#

I attach the relevant files, please tell me if I should provide more 
information. If trying to use a disk image file could help find the 
problem (and then hopefully boot from physical partition), tell me and 
I''ll try that.

Thanks for any help,
Jean-Baptiste Rouquier
PS : I''m not on the list, please add a copy to me when replying.


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Hi all,
I''m new to Xen and I''ve just spent two days trying to install
it. My
goal is to run Kubuntu on a laptop, with the ability to fire up Windows
when I need some non-ported proprietary application, and occasionally
boot windows natively to have ACPI or for some high performance windows
application.

It seems that in order to launch Windows within Xen, I have to create a
virtual disk, or disk image file. Is it right ?

If yes, does it mean that I won''t be able to run Windows natively ? Or
I''ll have to have two copies of Windows, one in the disk image, one in
it''s own partition. Not very handy (disk space, double configuration),
besides possible license issues.

If no (that is, if I should be able to launch Windows within Xen from it
current physical partition) could you please help me find what''s wrong
?
I have a D820 with Intel Core duo T2300 (and not T2300E which doesn''t
have VT-x), I''ve enabled VT in the setup. I checked that root can
connect to X server (typed xterm as root).
I untarred xen-3.0.2-src.tgz and ran make world; make install (I first
tried binary install, same problem),
edited /boot/grub/menu.lst; mv /lib/tls /lib/tls.disabled; echo ""
>
/var/log/xend.log; reboot;
mkdir /var/run/xenstored
xend start

# xm create windows
Using config file "/etc/xen/windows".
Started domain windows
# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0     1024     2 r-----    40.4
windows                            1      512     1 -b----     0.0
#

I put the relevant files here (looks like this kind of attachment is 
refused by symantec):
http://jb.rouquier.free.fr/transfert/xen/xen-files.tar.gz
please tell me if I should provide more
information. If trying to use a disk image file could help find the
problem (and then hopefully boot from physical partition), tell me and
I''ll try that.

Thanks for any help,
Jean-Baptiste Rouquier
PS : I''m not on the list, please add a copy to me when replying.


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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Zitat von Jean-Baptiste Rouquier <>:
> Hi all,
> I''m new to Xen and I''ve just spent two days trying to
install it.
Hello Jean-Baptiste,
you should choose a way as close as possible to 
http://en.opensuse.org/Xen_Full_Virtualization_Example

I have played around a bit, almost everything that I changed from this Setup did
not work. (vnc/sdl works)

Best Regards
Winfried


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Just to check : does Windows have to be installed on a FAT partition to 
run inside Xen ? Or can it be on an ntfs partition ?

Also, I have two lines in /var/log/xend.log :

[2006-06-08 20:28:14 xend] DEBUG (blkif:24) exception looking up device number
for hda: [Errno 2] No such file or directory: ''/dev/hda''
[2006-06-08 20:28:14 xend] DEBUG (DevController:103) DevController: writing
{''state'': ''1'',
''backend-id'': ''0'',
''backend'':
''/local/domain/0/backend/vbd/1/768''} to
/local/domain/1/device/vbd/768.

But when I change
disk = [ ''file:/var/lib/xen/images/windisk.img,ioemu:hda,w'' ]

to

disk = [ ''file:/var/lib/xen/images/windisk.img,ioemu:sda,w'' ]

I get

# xm create myxm.hvm
Using config file "myxm.hvm".
VNC= 1
Error: hvm: for qemu vbd type=file&dev=hda~hdd

And the domain doesn''t start.
Thanks,
Jean-Baptiste Rouquier


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> you should choose a way as close as possible to 
> http://en.opensuse.org/Xen_Full_Virtualization_Example
>
> I have played around a bit, almost everything that I changed from this
Setup did
> not work. (vnc/sdl works)
Thanks for your mail. I already knew this tutorial, but it gives info to 
boot windows in a disk image. But OK, I tried it and got :
Error: Device 768 (vbd) could not be connected

http://lists.xensource.com/archives/html/xen-users/2006-04/msg00706.html 
suggests
losetup -d /dev/loopX
which doesn''t work with X=0 or X=1, but running "losetup -f"
before xm
create makes the error message disapear.
(and I tried to launch windows again while I forgot to destroy it first, 
I got

Error: Device 768 (vbd) could not be connected.
File /var/lib/xen/images/windisk.img is loopback-mounted through /dev/loop0,
which is mounted in a guest domain,
and so cannot be mounted now.

so I guess there is no more loop problem)

Then I went to http://mccune.ece.cmu.edu/wordpress/?page_id=145 and 
following his advice I tried to use an image for the cdrom:
dd if=/dev/hdc of=winxp_installer.iso
and put in the config file
cdrom=''/var/lib/xen/images/winxp_installer.iso''
This page suggests
modprobe loop
which also makes the error message disapear.
But I still get

# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0     1024     2 r-----    68.3
winxp                              1      512     1 -b----     0.0


I have a few lines (probably one per attempt at xm create) in 
/var/log/xen-hotplug.log
xenstore-read: couldn''t read path backend/vbd/42/768/node
whrere 42 is acutally betxeen 1 and 6.

I''d like to be able to run windows from a hard disk partition, so that
I
can sometimes boot windows natively and use the whole ram. I''ve spent 
much time, if there is no more idea, I''m now considering giving up.
Thanks,
Jean-Baptiste Rouquier


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On Thursday 08 June 2006 19:42, Jean-Baptiste Rouquier
wrote:
> Just to check : does Windows have to be installed on a FAT partition to
> run inside Xen ? Or can it be on an ntfs partition ?
I have it running on NTFS with no problems.
> Also, I have two lines in /var/log/xend.log :
>
> [2006-06-08 20:28:14 xend] DEBUG (blkif:24) exception looking up device
> number for hda: [Errno 2] No such file or directory:
''/dev/hda'' [2006-06-08
> 20:28:14 xend] DEBUG (DevController:103) DevController: writing
{''state'':
> ''1'', ''backend-id'':
''0'', ''backend'':
''/local/domain/0/backend/vbd/1/768''} to
> /local/domain/1/device/vbd/768.
>
> But when I change
> disk = [
''file:/var/lib/xen/images/windisk.img,ioemu:hda,w'' ]
>
> to
>
> disk = [
''file:/var/lib/xen/images/windisk.img,ioemu:sda,w'' ]
>
> I get
>
> # xm create myxm.hvm
> Using config file "myxm.hvm".
> VNC= 1
> Error: hvm: for qemu vbd type=file&dev=hda~hdd
What does the device model section of your config file look like - and are you 
using an Intel VT-x or AMD Pacifica?

Jon

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/>> Just to check : does Windows have to be installed on a FAT partition
to/
>>/ run inside Xen ? Or can it be on an ntfs partition ?/
>I have it running on NTFS with no problems.
Thanks, it gives me hope ;-)
>What does the device model section of your config file look like
device_model = ''/usr/'' + arch_libdir +
''/xen/bin/qemu-dm''
and I checked that 
/usr/lib/xen/bin/qemu-dm
exists. 
>are you using an Intel VT-x or AMD Pacifica?
Intel VT-x, precisely the Intel duo core T2300 (in a Dell D820 laptop).
Jean-Baptiste



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