Figure 1.5 Raid5+0 Concept - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
1.2 Configuration
●
RAID5+0 (double striping with distributed parity)
Multiple RAID5 volumes are RAID0 striped. For large capacity configurations, use of
RAID5+0 instead of RAID5 results in enhanced performance, improved reliability, and shorter
rebuilding times.
Figure 1.5
Striping (RAID0)
Create parity data
A B
A B
P
A, B
E P F
E, F
P
I J
I, J
M
P
N
M, N
HDD0 HDD1 HDD2
RAID5
RAID5+0 concept
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
Copyright 2011 FUJITSU LIMITED
Data writing request
A B C D
A B C D
A C
B D
Striping with
C
distributed parity
(RAID5)
C
G
P
K, L
O
HDD3
29
Create parity data
D
D
P
C, D
H
P
G, H
L
K
P
P
O, P
HDD4 HDD5
RAID5
Striping (RAID0)
Striping with
distributed parity
(RAID5)
P3AM-3042-08ENZ0