RAID types

 RAID configurations enables  us to expand characteristics of storage value beyond the physical limitations of single disk.

Importance of RAID is to provide redundancy and increase the performance , fault tolerance.

RAID : Redundant Array of Independent Disks 

          Main RAID types are :

               

                RAID 0 : Concatenation or Striping. (not providing fault tolerance)

                RAID 1 : Mirroring.

                RAID 2 : Hamming code

                RAID 3 : All parity is stored into one disk. (similar to raid 2)

                RAID 4 : similar to raid 3

                RAID 5 : Striping with parity. (only one time tolerance)

                RAID 6 : raid 5 with extra parity disk.

                And Combinations like RAID 0+1 , RAID 1+0 . (hybrid)

                Hybrid levels : (Combinations of original RAID groups)

               RAID level 10 : Mirroring with striping.

               RAID level 30 : Parity RAID techniques with data striping.

               RAID level 50 : Parity RAID techniques with data striping.