[libvirt] libvirt external snapshot error

[Vasiliy Tolstov]

Hi, i'm using
virsh -c qemu+ssh://test.node/system snapshot-create-as 40083
--no-metadata --disk-only --live –atomic   --diskspec sda,file=/test

outputs:
error: Operation not supported: live snapshot creation is supported
only with external checkpoints

info:
Compiled against library: libvirt 1.2.16
Using library: libvirt 1.2.16
Using API: QEMU 1.2.16
Running hypervisor: QEMU 2.4.1


Does it supported on never libvirt? How can i solve the issue? I'm use
raw format for disk.
-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru