RAID 0
Striping, Splits documents a piece per drive, Fast but no redundancy
Raid 1
Mirroring, copies entire file to multiple drives. Good redundancy but slower speeds.
Raid 5
Striping with parity
Stripes on 2 drives and creates a back up parity file. Good speed and redundancy
Raid 6
Stripes on 2 drives and creates parity back up on 2 drives.
Raid 10
striping mirrors. 2 mirrored pairs, stripes data across the pairs.
RAID 0+1
Stripes onto pairs, mirrors the pairs.