<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' discard='unmap'/>
<source dev='/dev/mapper/{{ lv.vg | replace('-', '--') }}-{{ lv.lv | replace('-', '--') }}'/>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' discard='unmap'/>
<source dev='/dev/mapper/{{ lv.vg | replace('-', '--') }}-{{ lv.lv | replace('-', '--') }}'/>