Hi, I wonder how to perform a backup (in Dom0) of several DomU''s running in a Dom0. fact: a filesystem that is used by a DomU should not be mounted in Dom0 when the DomU is running and accessing it/writing to it. possible solution would be to shutdown DomU, backup its file systems in Dom0 and restart DomU. If the DomU uses devices which are LVM volumes in dom0, a possible scenario could be: - create a snapshot in Dom0 of the LVM volume which is used by DomU - mount the snapshot volume in Dom0 - back it up in Dom0 - unmount & remove the snapshot in Dom0. could this work ? regards, rainer.