Memory mirroring mode installation order
Memory-mirroring mode provides full memory redundancy while reducing the total node memory capacity in half. Memory channels are grouped in pairs with each channel receiving the same data. If a failure occurs, the memory controller switches from the DIMMs on the primary channel to the DIMMs on the backup channel.
Memory mirroring guidelines:
- Memory mirroring reduces the maximum available memory by half of the installed memory. For example, if the node has 64 GB of installed memory, only 32 GB of addressable memory is available when memory mirroring is enabled.
- Each DIMM must be identical in size and architecture.
- Partial Memory Mirroring is a sub-function of memory mirroring. It requires following the memory installation order of memory mirroring mode.
| Total DIMMs | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 8† | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Note †DIMM configurations that support Software Guard Extensions (SGX), see Enable Software Guard Extensions (SGX) to enable this feature. | ||||||||
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