Configuring two or more hard drives in a RAID (Redundant Array of Inexpensive Disks) setup can increase performance and/or provide automatic protection against data loss from drive failure.
RAID can be configured as below :
RAID 0 (Disk striping): RAID 0 splits data across any number of disks allowing higher data throughput.
RAID 1 (Disk Mirroring)
RAID 5 (Striping with parity)
RAID 6 (Striping with double parity)
RAID 10 (Striping + Mirroring)