<volume>
                <name>{{diskname}}</name>
                <source>
                    <device path='/dev/sdb1'>
                    </device>
                </source>
                <capacity unit='GB'>{{disksize}}</capacity>
                <allocation unit='GB'>{{disksize}}</allocation>
                <target>
                    <path>{{diskpath}}</path>
                    <format type='qcow2'/>
                    <permissions>
                        <mode>0660</mode>
                        <owner>106</owner>
                        <group>112</group>
                    </permissions>
                    <compat>1.1</compat>
                </target>
                {% if diskbasevolume %}
                    <backingStore>
                        <format type='qcow2'/>
                        <path>{{diskbasevolume}}</path>
                    </backingStore>
                {% endif %}
 </volume> 

