RAID Level 5

• Block level interleaved parity.

• Read requires the relevant disk.

• Write requires the relevant disk and the parity disk for the particular block.

• Recovery from failure is simple (XOR).

block 0

block 4

block 8

block 12

P(16-19)

block 1

block 5

block 9

P(12-15)

block 16

block 2

block 6

P(8-11)

block 13

block 17

block 3

P(4-7)

block 10

block 14

block 18

P(0-3)

block 7

block 11

block 15

block 19

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