[root@localhost~]#
cat /root/virt-scsi.xml
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x0b'function='0x0'/>
</controller>
Make sure that the slot used
for the virtio-scsi controller does not conflict with another device.