2-14
Memory Mirroring / Memory RAID Feature
M
T mory board as spare memory in standby state. If the current memory board
en ory mirroring feature switches to the standby memory board. When this
fe
ar
Mirroring with a pair of memory boards 1 and 2 and a pair of memory boards 3 and 4
To enable boards must have DIMMs of same capacity.
The table b
emory Mirroring Feature
he memory mirroring feature places a me
counters an uncorrectable error, the mem
ature is used, the current memory board and the standby memory board should be combined. Available combinations
e:
Mirroring with memory boards 1 and 2
the memory mirroring feature, the combined memory
elow shows combinations of memory boards installed.
Memory board 1 Memory board 2 Memory board 3 Memory board 4
A 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2)
B 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4)
C 4GB (1GB*4) 4GB (1GB*4) – –
Memory RAID
If one of four ncounte rror, feature ther
memory rd to n. To us memory board ust be installed. Each memory board
m e DIMMs of same capacity.
The table b of memory boards installed.
ory board 2 Memory board 3 Memory board 4
Feature
the memory boards e rs an uncorrectable e the memory RAID switches to the o
boa continue operatio e this feature, four s m
ust hav
elow shows combinations
Memory board 1 Mem
A 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2)
B 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4)
C 4GB (1GB*4) 4GB (1GB*4) 4GB (1GB*4) 4GB (1GB*4)
S
Start SET P a [ ] → re] ows:
ena rroring irror].
ena ID fea ].
O
M
luence the operations of applications.
Each feature is automatically disabled when an error message is displayed:
The following indicates that the memory mirroring /memory RAID feature has worked:
The Redundancy lamp on the front panel of the server lights green.
c) of Event Viewer:
etting BIOS
U nd select [Advanced] → Memory Configuration [Memory RAS Featu in order and set as foll
To ble the memory mi feature: Select [M
To ble the memory RA ture: Select [RAID
thers
Memory capacity displayed on the operating system = total capacity of physically installed memory –
capacity for standby memory
emory mirroring feature: 1/2 of actually installed memory capacity
Memory RAID feature: 3/4 of actually installed memory capacity
Enabling the memory mirroring or memory RAID feature does not inf
a)
b) The failing DIMM group is degraded when the server restarts.
If an ESMPRO Agent has been installed, the following log is registered as a system log
Source name: ESMCommonService
Event ID: 2313
Explanation: Part of the DIMM was isolated due to a memory error.
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