[libvirt-users] error: argument unsupported: unable to handle disk requests in snapshot

Hello, a problem occurred during making a snapshot for a guest, ask for help... 1. the xml for snapshotdomain like this: # cat deployment.1 <domainsnapshot> <name>a</name> <disks> <disk name='/home/qcow2/disk.0'> <driver type='qcow2'/> <source file='/home/qcow2/disk.3'/> </disk> </disks> </domainsnapshot> 2. when i execute the command , a mistake occurred: # virsh snapshot-create qcow2 deployment.1 error: argument unsupported: unable to handle disk requests in snapshot 3. i add the parameter '--disk-only', another mistake occurred: # virsh snapshot-create qcow2 deployment.1 --disk-only error: Failed to take snapshot: unknown command: 'snapshot_blkdev' 4. my libvirtd version is 0.9.4 , i update to 1.0.0 , also had this problem # libvirtd --version libvirtd (libvirt) 1.0.0 5. this is my guest below: # ls -l -rw-r--r-- 1 oneadmin oneadmin 1540 2012-11-27 15:27 deployment.0 -rw-r--r-- 1 root root 204 2012-11-27 21:28 deployment.1 -rw-r--r-- 1 root root 5772345344 2012-11-28 17:42 disk.0 -rw-r--r-- 1 root root 459264 2012-11-27 21:02 disk.1 -rw-r--r-- 1 root root 372736 2012-11-27 15:25 disk.2 # virsh list Id 名� �� ---------------------------------------------------- 1 qcow2 running # qemu-img info disk.0 image: disk.0 file format: qcow2 virtual size: 20G (21474836480 bytes) disk size: 5.4G cluster_size: 65536 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 1354019482 142M 2012-11-27 20:31:22 00:00:08.971 is there anyone has the same problem with me ? 于长江 | 东软 --------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. ---------------------------------------------------------------------------------------------------