Fujitsu ETERNUS DX60 S3 - Page 910

Appendix A Parameter List
A.5 RAID Group Management
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0
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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.
*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))

Redundant sets
(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
No. of drives in
the configuration
(per RAID group)
Redundant sets +
HS (*1)
Capacity
efficiency
(*2) (%)
Rebuilding
speed (*3)
(Rate)
Number of
data drives
Selection order when
configuring automatically
"Minimize
number of
using drives"
is selected
"Prioritize
rebuild rate"
is selected
11 (3D+2P)x2+1HS 54.5 2.20 6 1 5
13 (4D+2P)x2+1HS 61.5 2.17 8 2 6
17 (6D+2P)x2+1HS 70.6 2.13 12 3 7
23 (9D+2P)x2+1HS 78.3 2.09 18 4 8
29 (12D+2P)x2+1HS 82.8 2.07 24 5 9
31 (13D+2P)x2+1HS 83.9 2.06 26 6 10
31 (3D+2P)x6+1HS 58.1 6.20 18 Not selected 1
31 (4D+2P)x5+1HS 64.5 5.17 20 Not selected 2
29 (5D+2P)x4+1HS 70.0 4.14 20 Not selected 3
31 (8D+2P)x3+1HS 77.4 3.10 24 Not selected 4
RAID group number
Controlling CM assignment
Even numbers CM#0
Odd numbers CM#1