RAID

RAID (redundant array of inexpensive drives (or disks), refers to a data storage scheme using multiple hard drives to share or replicate data among the drives. The benefit of RAID is to increase data integrity, fault-tolerance, throughput and/or capacity, compared with single drives. In its original implementations, its key advantage was the ability to combine multiple low-cost devices using older technology into an array that offered greater capacity, reliability, speed, or a combination of these things, than was affordably available in a single device using the newest technology.