drive-virtio-disk0
filename    : 'gluster://gluster-host:24007/vol0/img1'
format node : '#block338'
format drv  : 'qcow2'
storage node: '#block282'
storage drv : 'gluster'
  filename    : 'gluster://gluster-host/vol0/img0'
  format node : '#block596'
  format drv  : 'raw'
  storage node: '#block477'
  storage drv : 'gluster'