Figure 5 Raid5+0 Concept - Fujitsu ETERNUS AF250 Design Manual

1. Function
RAID Functions
●
RAID5+0 (Double Striping with Distributed Parity)
Multiple RAID5 volumes are RAID0 striped. For large capacity configurations, RAID5+0 provides better perform-
ance, better reliability, and shorter rebuilding times than RAID5.

Figure 5 RAID5+0 Concept

A
A
E
P
I, J
M
Drive#0
Data writing request
A
Striping (RAID0)
A B
A
B
B
Create parity data
distributed parity
B P
A, B
F
P
E, F
I J
N P
M, N
Drive#1 Drive#2
RAID5
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
B C D
C D
C
D
Striping with
C
(RAID5)
C
G
P
K, L
O
Drive#3 Drive#4
19
D
Create parity data
D P
C, D
H
P
G, H
L
K
P
P
O, P
Drive#5
RAID5
Striping (RAID0)
Striping with
distributed parity (RAID5)
P3AG-1822-09ENZ0