It's cool that he DIYed it, and it's certainly budget but woodships as seperators on 20 drives? what happens if a drive fails? Also, 300W is cutting it slightly slim for 20 drives. Did he use Green-drives or normal ones? As for the SATA Controller, I'm assuming it was a SATA RAID Controller, in which cas I can't see one with 20 slots selling for $500. And why would you got 10? If the rest of the PC is so cheap, the RAID-0 benefits are going to be severly reduced. If he just needs a fileserver that's secure he should've gone with RAID6, effectively doubling his storage space...