The release notes say that virtual machine live disk image snapshotting 
was introduced in Scientific Linux 6.2.  However, when I try it, I get a 
"not supported" error:

# virsh snapshot-create-as outpost2 snap1 --disk-only --diskspec 
vda,snapshot=external,file=/var/lib/libvirt/images/outpost2-snap1.qcow2 
--atomic
error: Operation not supported: live disk snapshot not supported with 
this QEMU binary

I can't seem to find a lot of information about this through - can 
anyone offer advice?

Thanks.

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