It's a wrong method to copy guest image to target host, you require a NFSi am sorry,node1 is host1 ,it's my input error, i don't use share storage ,and the debug log level outputs a lot in the /var/log/libvirt/libvirtd.log on host1.example.com , the win7.img is a qcow2 img file ,and i copy it from server.example.com(source) to node1.example.com(dest)