Fujitsu ETERNUS DX60 S3 User Manual page 910

Appendix A Parameter List
A.5 RAID Group Management
Drive configuration for Fast Recovery RAID groups
The drive layout in the ETERNUS DX is the same as "RAID6". When using automatic configuration, the drive
configuration that satisfies the specified capacity is determined according to the following order.
No. of drives in
the configuration
(per RAID group)
11
13
17
23
29
31
31
31
29
31
*1: Fast Recovery RAID groups are described as "Redundant sets + HS".
RAID6((No. of data drives (D) + No. of parity drives (P)) x No. of redundant sets + No. of Hot spares (HS))
(Example) "RAID6 ((3D+2P)x2+1HS)" is described as "(3D+2P)x2+1HS".
*2: The ratio of the user capacity to physical drive capacity.
*3: Rate when the rebuilding speed for the basic "RAID6 (D+P)" configuration is "1". The rate varies depending on the
workload of the ETERNUS DX and system environment.
Automatic Controlling CM setting
The Controlling CM is determined by the value of the remainder when the RAID group number is divided by
the number of controllers. If CMs are not installed or if a failed CM exists, the controlling CM is assigned to
balance the load in the normal CMs.
• When using the ETERNUS DX60 S3/DX100 S3/DX200 S3, the ETERNUS DX500 S3/DX600 S3, or the ETERNUS
DX200F, all CMs are installed, and all CMs are in a normal state
RAID group number
Redundant sets + Capacity
HS (*1) efficiency
(*2) (%)
(3D+2P)x2+1HS
(4D+2P)x2+1HS
(6D+2P)x2+1HS
(9D+2P)x2+1HS
(12D+2P)x2+1HS
(13D+2P)x2+1HS
(3D+2P)x6+1HS
(4D+2P)x5+1HS
(5D+2P)x4+1HS
(8D+2P)x3+1HS

Redundant sets
Even numbers
Odd numbers
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
Rebuilding Number of
speed (*3) data drives
(Rate)
54.5 2.20
61.5 2.17
70.6 2.13
78.3 2.09
82.8 2.07
83.9 2.06
58.1 6.20
64.5 5.17
70.0 4.14
77.4 3.10
Controlling CM assignment
CM#0
CM#1
910
Selection order when
configuring automatically
"Minimize "Prioritize
number of rebuild rate"
using drives" is selected
is selected
6 1
8 2
12 3
18 4
24 5
26 6
18 Not selected
20 Not selected
20 Not selected
24 Not selected
P2X0-1270-13ENZ0
5
6
7
8
9
10
1
2
3
4