RAID 5 Hard Disk Array
RAID is a system of linking together hard drives to form a single large capacity storage device. RAID 5 combines the performance advantages of data striping with the redundancy of mirroring.
- Data striping - the data is split between two hard-disks increasing read-write speed
- Data mirroring - this striped array is then replicated onto another identical set of striped drives
With RAID 5, all data is fully redundant. So if a disk fails, your information is still available.