libvirt/tests/qemuxmlconfdata/disk-source-fd.xml

<domain type='qemu'>
  <name>QEMUGuest1</name>
  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
  <memory unit='KiB'>219136</memory>
  <currentMemory unit='KiB'>219136</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/path/to/blah' fdgroup='testgroup2'/>
      <target dev='vde' bus='virtio'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/path/to/cdimage-ro' fdgroup='cdimage-ro'/>
      <readonly/>
      <target dev='hda' bus='ide'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/path/to/cdimage-rw' fdgroup='cdimage-rw'/>
      <readonly/>
      <target dev='hdb' bus='ide'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/rhel7.1484071880' fdgroup='testgroup5'/>
      <backingStore type='file'>
        <format type='qcow2'/>
        <source file='/var/lib/libvirt/images/rhel7.1484071877' fdgroup='testgroup6'/>
        <backingStore type='file'>
          <format type='raw'/>
          <source file='/var/lib/libvirt/images/rhel7.1484071876' fdgroup='raw-rw-base'/>
          <backingStore/>
        </backingStore>
      </backingStore>
      <target dev='vdf' bus='virtio'/>
    </disk>
    <controller type='usb'/>
    <controller type='pci' model='pci-root'/>
    <memballoon model='virtio'/>
  </devices>
</domain>