CHAPTER 3 Component Configuration and Replacement (Add, Remove)
3.2 High availability configuration
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Mode in which the Memory Spare is used.
Note
The Memory Spare cannot be used when the Memory Mirror has been set.
3.2.4 Memory Mirror
In the PRIMEQUEST 2000 series, the Mirror Mode and the Partial Mirror Mode are supported as the memory
mirror, in which the function with the CPU is used. Full Mirror/Partial Mirror can be selected from the MMB
Web-UI.
TABLE 3.7 Memory Mirror Mode
Memory Mirroring is executed in each CPU for all SBs included in a partition.
Memory Mirroring is executed in each CPU, only for the Home SB included in
a partition. Memory Mirroring is not executed for an SB which is not the
*1: The operation of both Full Mirroring and Partial Mirroring is the same, when the partition is configured by
one SB.
Note
When configuring the partition with one SB, the Memory Mirror may be deleted before and after the Reserved
SB, depending on the SB DIMM configuration of the Reserved SB. For details, Reserved SB setting rules of
3.2.2 Reserved SB.
Memory Mirror RAS
This section describes the operation when there is an error in the DIMM in the Memory Mirror status.
- The Memory operation when using the Memory Mirror is selected from the MMB Web-UI.
- Mirror maintenance mode (the default)
When restarting the partition, the failed DIMM and the paired DIMM are not incorporated. The other
normal DIMMs will maintain the Memory Mirror.
- The Memory Mirror status will be maintained because only the normal DIMM would be used.
- Since the DIMM area suspected to have failed will be degraded, the memory capacity seen from the
operating system will be reduced.
- Memory capacity maintenance mode
The Memory Mirror status of the memory mirror group in which the memory suspected to have failed will
be deleted after the partition is restarted. Up to six The DIMM (DIMM with the same NN number as the
DIMM#NNM), including the failure suspected memory are not incorporated. The memory mirror group
maintains the status of the Memory Mirror.
For details on the memory mirror group, see ‘TABLE 3.8
Memory mirror group’.
TABLE 3.8
Memory mirror group
- Since the memory mirror group having a failure suspected DIMM operates in the Non Mirror, the status
would be Partial Memory Mirror.
