Fujitsu Eternus DX60 User Manual page 26

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
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
Striping (RAID0)
A B P
A, B
E F
P
E, F
P
I, J I J
M
N P
M, N
HDD0 HDD1 HDD2
RAID5+0 Concept
Data writing request
A B C D
A B C D
A, B C, D
E, F G, H
I, J K, L
M, N O, P
Striping with
distributed parity
(RAID5)
C
G
P
K, L
O
HDD3
26
D P
C, D
H
P
G, H
L
K
P
P
O, P
HDD4 HDD5
Striping (RAID0)
Striping with
distributed parity (RAID5)
Copyright 2009 FUJITSU LIMITED