Thanks for replies :)
I have been flip flopping between using hardware raid + WHS 2011 and some sort of software based raid. ZFS looks interesting but i'm not so sure about being unable to expand a RAIDZ2 array. I know that I could pool another RAIDZ2 array to increase space but with HDD...
Im looking to build a nas box soon however I am currently unsure on which controller to choose.
A HP P410 (8port) and HP P800 (16port) can be found for around £300, I've heard the P400 works well in non HP systems but I haven't really heard much in regards to the P800. I'm guessing the P410...