RAID Types

Question 1

RAID 0

Answer 1

Striping. Two discs are used and data is split between both
Ex: Disk 0 gets A1, A3, A5 while Disk 1 gets A2, A4, A6

Question 2

RAID 1

Answer 2

Mirroring and Redundancy. Two discs are used and data is copied exactly

Question 3

RAID 5

Answer 3

Redundancy through parity. 3 or more discs are used. Data is split between disks, however a parity is created for each chunk of data; therefore if one disk fails the data can be recovered using the parity

Question 4

RAID 6

Answer 4

Striping with dual parity. 4 or more discs. Same as RAID 5 but with 2 parities.

Question 5

RAID 10

Answer 5

Mirroring and striping. 4 or more disks are used. This combines RAID 1 and RAID 0. Data is split so it is mirrored on [0,1] and [2,3]
Ex: Disk 0 and Disk 1 gets A1, A3, A5 while Disk 2 and Disk 3 get A2, A4, A5