RAID and Subsystem Architectures
RAID Configurations
Summary of Common RAID Levels
Striping for Parity for Mirroring for
Speed Data Protection Data Protection
YES
RAID 0 No No
(Block)
RAID 1 No No YES
YES
RAID 3 YES No
(Byte)
YES
RAID 4, 5, 6 YES No
(Block)
RAID YES
No YES
0+1 and 1+0 (Block)
RAID 0, 1 and 1+0 are the most commonly used RAID levels in high-end
storage arrays.
RAID 5 is also common in high-end storage arrays and is the most commonly
deployed RAID type.
RAID 4 is used by NetApp in their filers, as part of their WAFL (Write
Anywhere File Layout) Architecture
RAID 4, 5 and 6 require the RAID Controller to perform Parity Calculations