Table 37. Memory mirrored channel mode DIMM population sequence (continued)
Number of DIMMs
Number of installed
microprocessor
DIMM connector
Seventh pair of DIMMs
2
13, 16
Eighth pair of DIMMs
2
21, 24
Ninth pair of DIMMs
2
14, 17
Tenth pair of DIMMs
2
20, 23
Eleventh pair of DIMMs
2
19, 22
Twelfth pair of DIMMs
2
15, 18
Note:
DIMM connectors 3, 6, 7, 10, 15, 18, 19, and 22 are not used in memory mirrored mode when UDIMMs
are installed in the server.
When you install or remove DIMMs, the server configuration information changes. When you restart the
server, the system displays a message that indicates that the memory configuration has changed.
Memory rank sparing
Sparing enables a failing rank to be replaced by ranks installed in an unoccupied space. An unused spare
rank on the channel can be used to copy the contents of a failing rank on that channel.
You can enable rank sparing memory in the Setup utility (see “Starting the Setup utility” on page 107).
The following diagram lists the DIMM connectors on each memory channel.
Figure 181. Connectors on each memory channel
Note:
You can install DIMMs for the microprocessor 2 once the microprocessor 2 is installed. You do not
need to wait until all of the DIMM connectors for microprocessor 1 are filled.
The following table shows the installation sequence for memory rank sparing mode:
Table 38. Memory rank sparing mode DIMM population sequence
Number of DIMMs
Number of installed
microprocessor
DIMM connector
First pair of DIMMs
1
1, 2
Second pair of DIMMs
1
4, 5
Third pair of DIMMs
1
8, 9
Fourth pair of DIMMs
1
11, 12
Fifth pair of DIMMs
1
7, 10
Sixth pair of DIMMs
1
3, 6
Removing and replacing components
267
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