User guide

Hardware options installation 47
• 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 88).
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
• 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 88).
Installing DIMMs
CAUTION: To avoid damage to the hard drives, memory, and other system components, the air
baffle, drive blanks, and access panel must be installed when the server is powered up.
1. Power down the server (on page 20).
2. Do one of the following:
o Open or remove the tower bezel, as needed ("Open or remove the tower bezel" on page 20).
o Extend the server from the rack (on page 21).