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XH321L V5 Server Node V100R005 Maintenance and Service Guide 02

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DIMM Installation Rules

DIMM Installation Rules

General DIMM Installation Rules

  • CPU sockets connected to the installed DIMMs cannot be empty.
  • Do not mix LRDIMMs and RDIMMs in the same server node.
  • For the DIMM installation sequence, see DIMM Slot Locations.
  • When installing DIMMs in a memory channel, install DIMMs of more ranks and then DIMMs of fewer ranks (starting from the slot farthest from the CPU in the channel). For example, install quad-rank DIMMs, then dual-rank DIMMs, and then sing-rank DIMMs.

Installation Rules for the Memory Sparing Mode

  • Follow the general DIMM installation rules.
  • The spare configuration of each channel must be valid.
  • Different channels can have different spare configurations.
  • Each channel with DIMMs installed must have a spare rank.

Installation Rules for the Memory Mirroring Mode

  • Follow the general DIMM installation rules.
  • Install DIMMs in either channels 1 and 2, or channels 3 and 4. The installed DIMMs must be of the same size and organization.
  • For a multi-CPU configuration, each CPU must have a valid memory mirroring configuration.

Installation Rules for the Memory Patrol Mode

See the general DIMM installation rules.

Updated: 2019-01-08

Document ID: EDOC1100033003

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