<disk type="file" device="cdrom">
<driver name="qemu" type="raw"></driver>
<source file="/tmp/virtio-win-0.1.225.iso"></source>
<target dev="sdcc" bus="scsi"></target>
</disk>
virsh attach-device 2 /gaodi-2008r2/cdrom.xml
cdrom/floppy device hotplug isn't supported