RAID Technology

I had this impression that RAID is only a mechanism for combating disk failure. It turns out that the first RAID organization (Level 0) does not provide any redundancy but is to improve system performance and throughput. So it is a technology to achieve higher data transfer as well as to provide fault tolerance. A quick search on available motherboards and raid controllers showed that RAID 0, 1 and 10 (and sometimes 5) are the mainstream organizations. Here is an easy to read article on Basic RAID Organizations.
So I think for my next desktop I would go with a RAID 10 with 4 SATA hard disks.