<disk type='network' device='disk'>
  <driver name='qemu' type='qcow2' cache='unsafe'/>
  <source protocol='rbd' name='rbdpool/rbdimg'>
    <host name='host1.example.com'/>
    <host name='host2.example.com'/>
    <auth username='testuser-rbd'>
      <secret type='ceph' usage='testuser-rbd-secret'/>
    </auth>
    <privateData>
      <nodenames>
        <nodename type='storage' name='node-a-s'/>
        <nodename type='format' name='node-b-f'/>
      </nodenames>
    </privateData>
  </source>
  <backingStore type='network' index='1'>
    <format type='qcow2'/>
    <source protocol='iscsi' name='iscsitarget/1'>
      <host name='example.org'/>
      <privateData>
        <nodenames>
          <nodename type='storage' name='node-b-s'/>
          <nodename type='format' name='node-b-f'/>
        </nodenames>
      </privateData>
    </source>
    <backingStore/>
  </backingStore>
  <target dev='vda' bus='virtio'/>
  <alias name='virtio-disk0'/>
</disk>
