Figure 64 RAID Configuration Example (When 12 SSDs Are Installed)
Drive#5
Drive#6
Drive#7
Drive#8
Drive#9
RAID5 × 2, Hot spare × 1, Unused drive × 1
RAID5 group 1 (*1)
Hot spare
Unused drive
Drive#0
Drive#1
Drive#2
Drive#3
Drive#4
Drive#10
Drive#11
RAID5 group 2 (*1)
*1: The capacity of the user data area is equivalent to four drives.
●
For SAS Disks, SAS SEDs, Nearline SAS Disks, Nearline SAS SEDs
RAID groups are created with RAID6, which has high storage efficiency.
shows an example RAID configuration.
Table 37 Guideline for the Number of Drives and User Capacities (When 1.2TB SAS Disks Are Installed)
Number of in-
stalled drives
RAID configuration that is to be
created
Hot spare
Unused drive
User capacity
RAID group
Capacity of the
user data area
(equivalent
number of
drives)
Per RAID group
Per storage sys-
tem
6 or less
RAID groups
cannot be cre-
ated
-
-
-
-
-
7
RAID6
´
1
4
1
0
Approximately
4.2TB
Approximately
4.2TB
8
RAID6
´
1
4
1
1
Approximately
4.2TB
Approximately
4.2TB
9
RAID6
´
1
6
1
0
Approximately
6.4TB
Approximately
6.4TB
10
RAID6
´
1
7
1
0
Approximately
7.4TB
Approximately
7.4TB
11
RAID6
´
1
8
1
0
Approximately
8.5TB
Approximately
8.5TB
12
RAID6
´
1
8
1
1
Approximately
8.5TB
Approximately
8.5TB
13
RAID6
´
2
8
1
0
Approximately
4.2TB
Approximately
8.5TB
14
RAID6
´
2
8
1
1
Approximately
4.2TB
Approximately
8.5TB
15
RAID6
´
2
8
1
2
Approximately
4.2TB
Approximately
8.5TB
2. Basic Functions
Smart Setup Wizard
109
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
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