RAID 0, 1, 5, 6.... "This one goes to 11..." Wait, it's like double redundant, which is well... redundant I guess. Aww never mind. Let the boys at Hardware Secrets sort it out for you.
"RAID (Redundant Array of Independent Disks) systems are used to increase the performance and/or reliability of the hard disk drives of the system. In this article we will explain the basics about RAID0, RAID1, RAID5 and the advantages of RAID6 over them."
Yeah, that's it... all the way up, all the way up.