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Hardware options installation 54
• Each channel can have a different valid online spare configuration.
• Each populated channel must have a spare rank:
o A single dual-rank DIMM is not a valid configuration.
o LRDIMMs are treated as dual-rank DIMMs.
Population order
For Online Spare memory mode configurations with a single processor or multiple processors, populate the
DIMM slots sequentially in alphabetical order (A through D).
For Online Spare memory mode configurations with multiple processors, populate the DIMM slots
sequentially in alphabetical order (P1-A, P2-A, P1-B, P2-B and so forth).
After installing the DIMMs, use RBSU ("HP ROM-Based Setup Utility" on page 82) to configure the memory
protection modes.
Installing a DIMM
1. Power down the server (on page 16).
2. Remove all power:
a. Disconnect each power cord from the power source.
b. Disconnect each power cord from the server.
3. Do one of the following:
o Extend the server from the rack (on page 16).
o Remove the server from the rack (on page 17).
4. Remove the access panel (on page 18).
5. Open the DIMM slot latches.
6. Install the DIMM.
7. Install the access panel (on page 19).
8. Install the server into the rack ("Installing the server into the rack" on page 26).
9. Power up the server (on page 16).