RAID is all hardware, the 2200 supports the following RAID types: 0, 1, 10, 5, 50, JBOD.
As for backups, we purchased 5 - 80G Iomega USB 2.0 external hard drives. One for each business day. It was a fun machine to build. It takes a bit of time for it to sink in that your working with such a...