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• The maximum available memory is reduced to half of the installed memory when memory mirrored
channel is enabled. For example, if you install 64 GB of memory using RDIMMs, only 32 GB of
addressable memory is available when you use memory mirrored channel.
The following diagram lists the DIMM connectors on each memory channel.
Figure 42. Connectors on each memory channel
The following table shows the installation sequence for memory mirrored channel mode:
Table 24. Memory mirrored channel mode DIMM population sequence
DIMMs
Number of installed
microprocessors
DIMM connector population
sequence on the system board
One Microprocessor
1st set
1
1, 4
2nd set
1
9, 12
3rd set
1
2, 5
4th set
1
8, 11
5th set
1
3, 6
6th set
1
7, 10
Two Microprocessors
1st set
2
1, 4
2nd set
2
13, 16
3rd set
2
9, 12
4th set
2
21, 24
5th set
2
2, 5
6th set
2
14, 17
7th set
2
8, 11
8th set
2
20, 23
9th set
2
3, 6
10th set
2
15, 18
11th set
2
7, 10
12th set
2
19, 22
Memory rank sparing
The memory rank sparing feature disables the failed memory from the system configuration and activates a
rank sparing DIMM to replace the failed active DIMM.
Removing and replacing components
117
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