Some people tend to mock Mac OS X in favour of some other Unixes, but i like it… For me, it sucks least.
Today i took some relativly small external firewire drives (250 GB each), attached them to my “always on” serving Mac Mini and it took less than 5 minutes to build a RAID on two external drive.
I’ve choosen a RAID 1 configuration as i want to use the drives for backup purpose. Mainly for my music collection and for the forthcoming Time Machine with Mac OS X Leopard.
As there is no possibility in OS X to share external drives (wtf, i know…) i recommend Sharepoints for greater flexibility with AFP and SMB shares.