[Users] How can I create a snapshot for virtual disks only?

Hi, I am testing oVirt engine 3.1 beta release 06-07. I tried "snapshots-->create" button for a VM and it looked like that the snapshot to be created was for both the running state of the system and the virtual disks. I am wondering if there is any way to create the snapshot only for the virtual disks of the VM in engine? -- Shu Ming <shuming@linux.vnet.ibm.com> IBM China Systems and Technology Laboratory