From mboxrd@z Thu Jan  1 00:00:00 1970
From: RaSca <rasca@miamammausalinux.org>
Subject: Problem booting Microsoft Windows KVM virtual machine
Date: Thu, 04 Nov 2010 12:55:42 +0100
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Hi all,
I'm having problems with a vm's startup, I cloned the entire disk of a=20
Windows 2000 with dd on a drbd device, that disk was configured with tw=
o=20
partitions. I'm able to see all the partitions contents by using kpartx=
=20
and mount them:

# kpartx -l /dev/drbd0
drbd0p1 : 0 202751488 /dev/drbd0 32
drbd0p2 : 0 285567360 /dev/drbd0 202751520

The problem is that when i try to startup the vm with virsh it hangs on=
=20
boot by saying "error on operating system load".
Here are the details and the vm conf:

# cat /etc/libvirt/qemu/vm-sophos.xml
<domain type=3D'kvm'>
   <name>vm-sophos</name>
   <uuid>213a464c-73ad-8122-3647-7ff6b78d9e07</uuid>
   <memory>262144</memory>
   <currentMemory>262144</currentMemory>
   <vcpu>1</vcpu>
   <os>
     <type arch=3D'i686' machine=3D'pc-0.12'>hvm</type>
     <boot dev=3D'cdrom'/>
     <boot dev=3D'hd'/>
   </os>
   <features>
     <acpi/>
     <apic/>
     <pae/>
   </features>
   <clock offset=3D'utc'/>
   <on_poweroff>destroy</on_poweroff>
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
     <emulator>/usr/bin/kvm</emulator>
     <disk type=3D'file' device=3D'disk'>
       <driver name=3D'qemu' type=3D'raw'/>
       <source file=3D'/dev/drbd0'/>
       <target dev=3D'hda' bus=3D'ide'/>
       <address type=3D'drive' controller=3D'0' bus=3D'0' unit=3D'0'/>
     </disk>
     <disk type=3D'file' device=3D'cdrom'>
       <driver name=3D'qemu' type=3D'raw'/>
       <target dev=3D'hdc' bus=3D'ide'/>
       <readonly/>
       <address type=3D'drive' controller=3D'0' bus=3D'1' unit=3D'0'/>
     </disk>
     <controller type=3D'ide' index=3D'0'>
       <address type=3D'pci' domain=3D'0x0000' bus=3D'0x00' slot=3D'0x0=
1'=20
function=3D'0x1'/>
     </controller>
     <interface type=3D'bridge'>
       <mac address=3D'52:54:00:15:0d:68'/>
       <source bridge=3D'br0'/>
       <address type=3D'pci' domain=3D'0x0000' bus=3D'0x00' slot=3D'0x0=
3'=20
function=3D'0x0'/>
     </interface>
     <serial type=3D'pty'>
       <target port=3D'0'/>
     </serial>
     <console type=3D'pty'>
       <target type=3D'serial' port=3D'0'/>
     </console>
     <input type=3D'mouse' bus=3D'ps2'/>
     <graphics type=3D'vnc' port=3D'-1' autoport=3D'yes' keymap=3D'en-u=
s'/>
     <video>
       <model type=3D'cirrus' vram=3D'9216' heads=3D'1'/>
       <address type=3D'pci' domain=3D'0x0000' bus=3D'0x00' slot=3D'0x0=
2'=20
function=3D'0x0'/>
     </video>
     <memballoon model=3D'virtio'>
       <address type=3D'pci' domain=3D'0x0000' bus=3D'0x00' slot=3D'0x0=
4'=20
function=3D'0x0'/>
     </memballoon>
   </devices>
</domain>

Note that I've tried to change "source file" parameter with /dev/dm-0p1=
,=20
/dev/drbd0p1, but virsh don't let me boot the machine saying it is=20
unable to find the disk.

The kvm command launched by virsh is this one:

/usr/bin/kvm -S -M pc-0.12 -cpu qemu32 -enable-kvm -m 256 -smp=20
1,sockets=3D1,cores=3D1,threads=3D1 -name vm-sophos -uuid=20
213a464c-73ad-8122-3647-7ff6b78d9e07 -nodefaults -chardev=20
socket,id=3Dmonitor,path=3D/var/lib/libvirt/qemu/vm-sophos.monitor,serv=
er,nowait=20
-mon chardev=3Dmonitor,mode=3Dreadline -rtc base=3Dutc -boot dc -drive=20
file=3D/dev/drbd0,if=3Dnone,id=3Ddrive-ide0-0-0,boot=3Don,format=3Draw =
-device=20
ide-drive,bus=3Dide.0,unit=3D0,drive=3Ddrive-ide0-0-0,id=3Dide0-0-0 -dr=
ive=20
if=3Dnone,media=3Dcdrom,id=3Ddrive-ide0-1-0,readonly=3Don,format=3Draw =
-device=20
ide-drive,bus=3Dide.1,unit=3D0,drive=3Ddrive-ide0-1-0,id=3Dide0-1-0 -de=
vice=20
rtl8139,vlan=3D0,id=3Dnet0,mac=3D52:54:00:15:0d:68,bus=3Dpci.0,addr=3D0=
x3 -net=20
tap,fd=3D44,vlan=3D0,name=3Dhostnet0 -chardev pty,id=3Dserial0 -device=20
isa-serial,chardev=3Dserial0 -usb -vnc 0.0.0.0:0 -k en-us -vga cirrus=20
-device virtio-balloon-pci,id=3Dballoon0,bus=3Dpci.0,addr=3D0x4

I'd also followed the steps described here:

http://www.brandonturner.net/blog/2010/01/convert-windows-to-xen-guest/

to use fixmbr and the operation succeed, but the error on the vm is=20
still the same.

What should else i check?

--=20
Raoul Scarazzini
Mia Mamma Usa Linux: Niente =E8 impossibile da capire, se lo spieghi be=
ne!
mobile: +393281776712
rasca@miamammausalinux.org
http://www.miamammausalinux.org