Yes, It has worked fine for me. There may be some danger though. Centos handles it fine.
From: xen-users-bounces@xxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of Alberto Asuero
Sent: Thursday, March 08, 2012 11:50 PM
To: xen-users@xxxxxxxxxxxxx
Subject: [Xen-users] Backup domU image at runtime
Hello!
I'm running xen 3.4.1, I've a partition with lots of virtual machines mount at /vserver/images/domains. Inside that folder I've all the img disk (created with dd) of each virtual machine.
# ls /vserver/images/domains
# win_xp.img win7.img ubuntu.img debian.img w2008.img gentoo.img
Could I run a cp or rdiff-backup over /vserver/images/domains when these virtual machines are running?