NEC Express5800/140Rf-4, Руководство пользователя

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General Description 2-15
Memory Mirroring
Feature
Memory Mirroring Feature
The memory mirroring feature places a memory board as spare memory in standby state. If the
current memory board encounters an uncorrectable error, the memory mirroring feature switches to
the standby memory board. When this feature is used, the current memory board and the standby
memory board should be combined. Available combinations are:
„
Mirroring with a pair of memory boards A and B and a pair of memory boards C and D
To enable the memory mirroring feature, the combined memory boards must have the DIMMs of
same size and capacities.
Setting BIOS
Start SETUP and select [Advanced]
→
[Memory Configuration]
→
[Memory RAS Feature] in order
and set as follows:
„
To enable the memory mirroring feature: Select [Mirror].
Others
„ Memory capacity displayed on the OS = total capacity of physically installed memory –
capacity for standby memory
Memory mirroring feature: 1/2 of actually installed memory capacity
„
Enabling the memory mirroring feature does not influence the operations of applications.
„ The each feature is automatically disabled when an error message is displayed:
The following indicates that the memory mirroring feature has worked:
a) The failing DIMM group is degraded when the server restarts.
b) If NEC ESMPRO Agent has been installed, the following log is registered as a system
log of Event Viewer:
Source name: ESMCommonService
Event ID: 2313
Explanation: Part of the DIMM was isolated due to a memory error.
Memory number: XX
Date/time: XX
c) If report setting is made through NEC ESMPRO Agent, Manager reporting and
ALIVE reporting is performed. The report contents are as follows:
Explanation: Part of the DIMM was isolated due to a memory error.
Memory number: XX
Date/time: XX