Redundant Array of Independant Disks. Its used for fault tolerance. Raid 1-5 is supported by NT which includes mirroring, Duplexing, Striping and Striping with Parity.
No, it's disks....
Generally it's using 2 or more drives as one logical drive. This speeds up the (logical) drive (RAID 0), or provides fault tolerance, by keeping 2 copies of the data on 2 seperate disks (RAID 1). That's the RAID on the Abit and so on. There are many other different forms of RAID. When are we going to get RAID 5 on an IDE controller???
Agreed. Software raid 5 sucks but a good raid adapter and nice scsi disks can be quite performant and quite secure.. ( Still need to make tape backup just in case 2 disks crash at the same time ).