I'm considering going a somewhat simpler on my next server setup. I'm pretty confident that 9TB of usable space will keep me happy for ~3 years (which is my upgrade cycle). I was considering buying 2 HP microservers and put FreeNAS on one and WHS 2011 on the other. This gives me server capability I want as well as backup capability . Is the chance too high with the proposed system to get a failure during my recovery (from FreeNAS to WHS) or rebuild (FreeNAS drive failure)? I guess in a more simple sense, are we in an era where no matter what, that a hot spare or RAID6 is the min for 3TB + drives? -------------  Key data is still backed up in the cloud and offsite blu-ray discs.