Memory sparing support – Dell PowerEdge R715 User Manual

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Installing System Components

• In case of mixed-rank population, first populate the DIMM with the

highest number of ranks (in sockets with white release levers).

• If memory modules with different speeds are installed, they operate at the

speed of the slowest installed memory module(s).

• If online sparing is enabled, identical DIMMs must be installed in the

same slots across each channel.

The system supports advanced ECC, memory interleaving, and online

sparing. For information on memory configurations, see Table 3-2.

Memory Sparing Support

Memory sparing is supported in systems that have one of the fully populated

memory configurations shown in Table 3-2. The memory sparing feature

must be enabled in the Memory Settings screen of the System Setup

NOTE:

The memory sparing and node interleaving features cannot be used at the

same time. To use memory sparing, you must disable the Node Interleaving option

in the System Setup program.

To support memory sparing, all eight DIMM sockets of each CPU must be

populated. When enabled, memory sparing allocates and reserves one rank of

memory from the installed DIMMs and is large enough to act as spare

memory in the event of a memory rank failure where the contents of the

failed rank is copied to the spared rank.

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