I'm thinking about purchasing an ATTO ExpressSAS R608 or R644 for my 5,1 Mac Pro. It appears that these are one of the few non-Apple RAID cards that can boot OS X. I know this isn't the ATTO support forum, but I was hoping one of you already has this configuration and could help me out with this. Does anyone know if these cards support a RAID 0+1 configuration? My intentions are to have two striped 2TB drives and a single 4TB drive to mirror them. Finally, would this configuration be significantly slower than RAID 10? Thanks in advance!