[Users] RAID1 mirror on ovirt-node + engine nfs server

Hi. I've been reading about ovirt, and ready to try my own experiments with it. I have two small questions.. When an ovirt-node is installed from the standard ISO, there's no mention in the documentation about setting up a RAID1 mirror for the root disk on the node. I'm sure that once I get around to working out kickstarting the node, I could easily install the raid1 mirror, but I'm just wondering why I don't see that in the default ISO. Maybe I'm just missing something. Is redundancy of the disk on the node not important? Sure, if the node goes down, I guess the VMs could be run on other nodes, but if we can prevent the node from going down in the first place, then why not? I also have a question about the storage backend. In particular, I have a pretty powerful server that I intend to use as the NFS server, and a few servers to use as nodes. On the other hand, I don't have a powerful machine (at the moment) to use for the ovirt-engine. Would it be poor practice to run the ovirt-engine ON the NFS server? During engine setup, I see that you can setup an NFS share for ISOs from the ovirt-engine, but I don't think there's mention of just generalized storage there. I suspect it's "poor practice", but I thought I'd ask anyway. My setup will be relatively small (say, 4 nodes), and this would let me reduce 1 general server from the infrastructure (dedicated ovirt-engine). Thanks! :) Jason. ps: At the moment, I am not subscribed to users - please cc: me on responses.