well i've finally got me PM G5 being delivered tomorrow. it's a dual-processor model, and i'm going to put in a G5 drive bracket so i can squeeze in a few extra hard drives in there. one of the big reasons i'm moving up to a PM from a PB is because my PB HD failed, and i lost alot of data. i know, backup, backup... but i can't have this happen again. so with 5 internal drives i'm going to setup RAID 5 (i think that's the one - where you lose about 1/5 or 1/4 HD space to have backup data spread accross all drives?) I just need some help in figuring out exactly how to do this. on the hard ware side - i'll need the extra drives. i'm thinking of buying 3x300GB drives for the bracket (the PM already has 2x200GB drives). also i'll need a RAID Hard Drive Controller, that's Mac compatible. what would you guys recommend? obviously i'll need extra cables to hook all this stuff up, but i can figure that out. then on the software side of things... i'm thinking of leaving one 200GB drive un-RAID'd as a boot drive. this way if OS X messes up (or i mess it up ) it's easy to re-install. then i'd have 1x200GB & 3x300GB drives setup to RAID. is this possible? or even recommended? i'm not sure if RAID should only be done with drives of the same size...? thanks for any help with this. also if anyone else has ideas about how to setup for redundency - i'd love to hear 'em. edit>> and what about partitioning? it was a partitioned HD in my PB that died - i took it to an Apple re-seller and the guy there said "Hard Drives don't like being partitioned. It's no good for them." i didn't say anything, but i was thinking... "WTF??!!!". could someone clarify that this guy didn't have a clue what he was talking about?