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•Memory sparing and memory mirroring require eight FBDs, and all FBDs must be of identical memory size, speed, and technology.
•Memory sparing and memory mirroring cannot be implemented at the same time.
Non-Optimal Memory Configurations
System performance can be affected if your memory configuration does not conform to the preceding installation guidelines. Your system may issue an error message during startup stating that your memory configuration is
Memory Sparing Support
The system supports memory sparing if eight identical memory modules are installed in the system. The memory sparing feature must be enabled in the System Setup program and can be used only if memory mirroring is not enabled.
Memory sparing allocates four ranks of DIMM memory to the spare bank. These four ranks consist of the first rank of memory in DIMM sockets 1 through 4. For
Table
DIMMs | Size/Type | Total Memory | Available | Spare |
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8 | 8 GB | 4 GB | 4 GB | |
8 | 16 GB | 8 GB | 8 GB | |
8 | 16 GB | 12 GB | 4 GB | |
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Memory Mirroring Support
The system supports memory mirroring if eight identical memory modules are installed in the system. Mirroring must be enabled in the System Setup program and can be used only if memory sparing is not enabled. In a mirrored configuration, the total available system memory is