A server based technology that uses multiple disk drives together for improved performance and fault tolerance. The improved performance comes from storing the data on multiple discs which improves the I/O operations. The improved fault tolerance comes from using multiple disks, which increases the mean time between failures.
RAID-1 Uses disk mirroring and uses at least two drives to duplicate data storage.
RAID-5 Level 5 is the most popular implementation of RAID. It uses data striping and the entire read and write operations are overlapped. RAID-5 requires at least three disks in the array, the NuPoint IP 640 uses 7.