filename : '/var/lib/libvirt/images/rhel7.3.1483545313'
format node : '#block187' storage node: '#block033'
filename : '/var/lib/libvirt/images/rhel7.3.1483536402'
format node : '#block306' storage node: '#block220'
filename : '/var/lib/libvirt/images/rhel7.3.qcow2'
format node : '#block558' storage node: '#block481'
