I'm coming from a vmware environment, wanting to play with Xen. I have a server with 2 x 500G SATA drives (no hardware RAID available, have to use software-based RAID1).

My partitions are all RAID1 except for swap. I left a little over 400G for my VMs and I would like to use LVM for the disk images. For domU's swap, should I allocate that from the 400G or should that be coming from dom0's partition? I asked because I've seen numerous config options that shows either or.