Lenovo ThinkSystem SR550 Setup Manual

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Table 12. Independent mode with two processors (continued)TotalmemorymodulesProcessor 2 Processor 1 Totalmemo-rymod-ules12 11 10 9 8 7 6 5 4 3 2 111 11 10 9 8 7 6 5 4 3 2 1 1112 12 11 10 9 8 7 6 5 4 3 2 1 12Mirroring modeIn mirroring mode, each memory module in a pair must be identical in size and architecture. The channels aregrouped in pairs with each channel receiving the same data. One channel is used as a backup of the other,which provides redundancy.Note: All memory modules to be installed must be the same type with the same capacity, frequency,voltage, and rank.The following table shows the memory module population sequence for mirroring mode when one processor(CPU1) is installed.Table 13. Mirroring mode with one processorTotalmemorymodulesProcessor 1 Totalmemorymodules6 5 4 3 2 12 3 2 23 3 2 1 34 5 4 3 2 46 6 5 4 3 2 1 6The following table shows the memory module population sequence for mirroring mode when twoprocessors (CPU1 and CPU2) are installed.Table 14. Mirroring mode with two processorsTotalmemorymodulesProcessor 2 Processor 2 Totalmemo-rymod-ules12 11 10 9 8 7 6 5 4 3 2 14 9 8 3 2 45 9 8 3 2 1 56 9 8 7 3 2 1 68 11 10 9 8 5 4 3 2 89 9 8 7 6 5 4 3 2 1 910 11 10 9 8 6 5 4 3 2 1 1012 12 11 10 9 8 7 6 5 4 3 2 1 1260 ThinkSystem SR550 Setup Guide