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Memory mirroring mode

In mirrored-channel mode, mirroring of the memory is done between Channels 0, 1, and 2 or Channels 3, 4, and 5. One channel is used as a backup of the other, which provides redundancy. The memory contents on channel 0 are duplicated in channel 1, and the memory contents of channel 2 are duplicated in channel 3. The effective memory that is available to the system is only half of what is installed.

Table 1. DIMM population sequence for mirrored-channel mode.
Number of installed DIMMs1 processor installed
DIMM connector
23, 5
31, 3, 5
43, 5, 8, 10
63, 5, 8, 10, 1, 12
83, 5, 8, 10, 4, 6, 7, 9
93, 4, 5, 6, 8, 10, 1, 2, 12
121, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
Note
For mirrored-channel mode, the DIMM pair must be identical in size, type, and rank count.
Table 2. DIMM population sequence for mirrored-channel mode.
Number of installed DIMMs2 processors installed
DIMM connector
43, 5, 22, 20
63, 5, 22, 20, 1, 24
83, 5, 22, 20, 8, 10, 17, 15
123, 5, 8, 10, 22, 20, 17, 15, 1, 12, 24, 13
163, 5, 8, 10, 22, 20, 17, 15, 21, 19, 18, 16, 4, 6, 7, 9
241, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 22, 21, 20, 19, 18, 17, 16, 15, 24, 23, 14, 13
Note
For mirrored-channel mode, the DIMM pair must be identical in size, type, and rank count.