i wont be able to take image backup of LINUX OS from urbackup
It s not supported right now.
Anyhow in general , you can t image a mounted ext3/ext4 without lvm anyway.
If you think you can , read the small line in the docs and maillign list , you ll see you can’t
You might be able to do it for zfs/btrfs maybe xfs. But at this moment urbackup wont support that.