Redundant array of independent disks
In computing, a redundant array of inexpensive disks (more commonly known as a RAID) is a system of using multiple hard drives for sharing or replicating data among the drives. Depending on the version chosen the benefit of RAID is a one or more of increased data integrity, fault-tolerance, throughput or capacity compared to single drives.
- RAID 0 & 1 must be 2 discs.
- RAID 3-6 need n+1 discs. Where n has to be 2 or greater. (n=1 would make no sense.)