Dell PowerEdge RAID Controller 6i - Manual (Page 20)

20
Overview
Figure 2-3. Example of Distributed Parity (RAID 5)
NOTE:
Parity is distributed across multiple physical disks in the disk group.
Figure 2-4. Example of Dual Distributed Parity (RAID 6)
NOTE:
Parity is distributed across all drives in the array.
Stripe element 1
Stripe element 7 Stripe element 2
Stripe element 8 Stripe element 3
Stripe element 9 Stripe element 4
Stripe element 10
Stripe element 5
Parity (6–10)
Parity (11–15)
Parity (1–5)
Stripe element 6
Stripe element 12 Stripe element 15 Stripe element 11 Stripe element 14 Stripe element 13
Stripe element 19
Stripe element 25 Stripe element 20
Stripe element 23
Stripe element 18
Stripe element 21
Stripe element 16
Stripe element 22
Stripe element 17
Parity (21–25)
Parity (26–30)
Parity (16–20)
Stripe element 24
Stripe element 30 Stripe element 27 Stripe element 29 Stripe element 26 Stripe element 28
Stripe element 1
Stripe element 5 Stripe element 2
Stripe element 6 Stripe element 3
Parity (5–8)
Stripe element 4
Parity (5–8)
Parity (1–4)
Stripe element 7
Stripe element 10
Parity (1–4)
Stripe element 8
Stripe element 12 Stripe element 9 Stripe element 11 Parity (9–12) Parity (9–12)
Stripe element 13 Stripe element 14 Stripe element 16 Parity (13–16) Stripe element 15 Parity (13–16)
Dell_PERC6.1_UG.book Page 20 Wednesday, April 15, 2009 4:18 PM