Adrian Rojak Pot has posted a RAID Optimization Guide
RAID stands for Redundant Array of Inexpensive Disks. However, some prefer to define RAID as Redundant Array of Independent Disks. In principle, RAID is a technique in which you logically turn two or more hard disks into a single, high performance hard disk. How this is done depends on which RAID level is used.Read more
Well, there is quite a lot to talk about regarding RAID as a whole. However, I'll try to keep it short and simple, and yet informative enough so that even newbies will be able to understand the concept of RAID as well as how, when and why it can improve the hard disk performance.