Hardware options installation 44
o
Next: D and E
o Last: G and H
o Do not populate slots C, F, or I.
• UDIMM
o First: A and B
o Last: D and E
o Do not populate slots C, F, G, H, or I.
After installing the DIMMs, use RBSU to configure the system for Lockstep memory support ("Configuring
lockstep memory" on page 77).
Online Spare population guidelines
For Online Spare mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines (on page 42).
• DIMM configuration on each channel of a processor must be identical.
• Each processor must have a valid Online Spare configuration.
• In multi-processor configurations, each processor can have a different valid Online Spare
configuration.
Single-processor Online Spare population order
For Online Spare mode configurations with a single processor, populate the DIMM slots in the following
order:
• RDIMM
o First: A, B, and C
o Next: D, E, and F
o Last: G, H, and I
• UDIMM
o First: A, B, and C
o Last: D, E, and F
o Do not populate slots G, H, and I.
After installing the DIMMs, use RBSU to configure the system for online spare memory support
("Configuring online spare memory" on page 77).
Multi-processor Online Spare population order
For Online Spare mode configurations with a multiple processors, populate the DIMM slots for each
processor in the following order:
• RDIMM
o First: A, B, and C
o Next: D, E, and F
o Last: G, H, and I
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