RAID, Redundant Array of Independent Disks: a technical standard to connect the motherboard of a computer and several disk drives. It allows the parallel use of these different storage media.
This parallel use offers two possibilities, which may or may not be combined:
- accelerated recording, with a single file being broken down into several parts that are transferred simultaneously to as many drives;
- several copies of a file can be saved - this is the principal of the mirror disk - to make a permanent backup.