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qemu KVM: can't boot a qemu machine with liveCD (system rescue)


there is no special forum/mailinglist existing for qemu-KVM, right? 

My problem is: I can't boot a qemu machine with liveCD (system rescue)

I inserted

    <type arch='x86_64' machine='pc-0.12'>hvm</type>
    <boot dev='cdrom'/>
    <boot dev='hd'/>
    <bootmenu enable='yes'/>

into xml-File but the appearing menu at boot time: 

   Press F12  for boot menu.  (I pressed F12)

   Select boot device:
   1. Legacy option rom
   2. Legacy option rom  (indeed, same line two times)
   3. CD-ROM [ata1-0: QEMU DVD-ROM ATAPI-4 CD-Rom/DVD-Rom]
   4. virtio-net.zrom 5.4.4. (GPL) ether

But 3. is NOT booting from CD! 1. and 2. not either. But grub is booting with 3.  
CD-ROM is ignored. Why?
Using sr0 instead of cdrom results in: 

root@squeeze64:~# virsh start suse111
error: failed to get domain 'suse111'
error: Domain not found: no domain with matching name 'suse111'

BTW: I did /etc/init.d/libvirt-bin stop -> start before, of course.

Mount of /dev/sr0 or /dev/cdrom to /mnt works, the CD is present 
and is readable.

How can I boot a qemu machine with liveCD (system rescue)? 
Why? -> because of kernel panic

Please help!

Are there other possibilities to boot a qemu-KVM machine by a liveCD?


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