Today Miles has Part 1 of his 3 Part Guide on RAID ready for your reading.
The use of RAID, a Redundant Array of Inexpensive Disks, up until a few years ago was pretty much limited to servers and high end workstations; this was primarily due to the cost of the controller and the accompanying hard drives. Today that's not at all the case! Most of the newer motherboards provide one or more onboard RAID controllers capable of delivering configurations up to and including RAID 5. With the cost of disk storage at an all time low the two primary barriers to using this once esoteric form of data storage have been lifted.. You can read on over at Bjorn3D.