Figure 4.5 Raid5+0 Concept - Fujitsu ETERNUS DX80 S2 Overview

Chapter 4 System Configuration
4.1 RAID Levels
●
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 4.5 RAID5+0 concept

A
A
E
P
I, J
M
HDD0
Data writing request
A
Striping (RAID0)
A
A
B
B Create parity data
B P
A, B
F
P
E, F
I J
P
N
M, N
HDD1 HDD2
RAID5
35
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
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B C D
B C D
C
D
Striping with
C
distributed parity
(RAID5)
C
G
P
K, L
O
HDD3
D
Create parity data
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-4812-11ENZ0