Hardware options installation 91
Data is written to both memory channels. Data is read from one of the two memory channels. If an
uncorrectable error is detected in the active memory channel, data is retrieved from the mirror channel. This
channel becomes the new active channel, and the system disables the channel with the failed DIMM.
General DIMM slot population guidelines
Observe the following guidelines for all AMP modes:
•
Install DIMMs only if the corresponding processor is installed.
•
Do not mix LRDIMMs and RDIMMs.
•
White DIMM slots denote the first slot of a channel (Ch 1-A, Ch 2-B, Ch 3-C, Ch 4-D).
•
When only one processor is installed, install DIMMs in sequential alphabetic order: A, B, C, D, E, F,
and so forth.
•
When two processors are installed, install the DIMMs in sequential alphabetical order balanced
between the two processors: P1-A, P2-A, P1-B, P2-B, P1-C, P2-C, and so forth.
•
When single-rank, dual-rank, and quad-rank DIMMs are populated for two DIMMs per channel, always
populate the higher number rank DIMM first (starting from the farthest slot). For example, first quad-rank
DIMM, then dual-rank DIMM, and then lastly single-rank DIMM.
•
DIMMs should be populated starting farthest from the processor on each channel.
For more information about server memory, see the HP website (
http://www.hp.com/go/memory
).
The DIMM speeds supported in this server are listed in the following table:
Populated slots
(per channel)
Rank
Speeds supported (MT/s)
1
Single, dual, or quad-rank 2133
2
Single, dual, or quad-rank 2133
Advanced ECC population guidelines
For Advanced ECC mode configurations, observe the following guidelines:
•
Observe the general DIMM slot population guidelines (on page
91
).
•
DIMMs may be installed individually.
Online spare population guidelines
For Online Spare memory mode configurations, observe the following guidelines:
•
Observe the general DIMM slot population guidelines (on page
91
).
•
Each channel must have a valid online spare configuration.
•
Each channel can have a different valid online spare configuration.
•
Each populated channel must have a spare rank. A single dual-rank DIMM is not a valid configuration.
Mirrored Memory population guidelines
For Mirrored Memory mode configurations, observe the following guidelines:
•
Observe the general DIMM slot population guidelines (on page
91
).
