Lenovo ThinkSystem SR950 - Page 105

Installation order: memory mirroring with two processors
Memory module installation order for memory mirroring with two processors installed in the server.
The following table shows the DIMM population sequence for memory mirroring when two processors are
installed.
• Processors 1 and 2 are installed in the lower system board of the lower compute tray.
Note: When adding one or more DIMMs during a memory upgrade, you might need to move other DIMMs
that are already installed to new locations.
Table 78. Memory mirroring with two processors, 4 to 24 total DIMMs installed in server
Total Processor 1 Processor 2 Total
DIMMs 1 2 3 4
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DIMMs
4 8 10 20 22 4
5 8 10 12 20 22 5
6 8 10 12 20 22 24 6
7 3 5 8 10 20 22 24 7
8 3 5 8 10 15 17 20 22 8
9 1 3 5 8 10 12 20 22 24 9
10 1 3 5 8 10 12 15 17 20 22 10
11
11 DIMM memory mirroring configuration is not
supported.
11 DIMM memory mirroring configuration is not
supported.
11
12 1 3 5 8 10 12 13 15 17 20 22 24 12
13 1 3 5 7 8 9 10 11 12 15 17 20 22 13
14 1 3 5 8 10 12 15 16 17 18 19 20 21 22 14
15 1 3 5 7 8 9 10 11 12 13 15 17 20 22 24 15
16 3 4 5 6 7 8 9 10 15 16 17 18 19 20 21 22 16
17 1 3 5 7 8 9 10 11 12 15 16 17 18 19 20 21 22 17
18 1 3 5 7 8 9 10 11 12 13 15 17 19 20 21 22 23 24 18
19 19 DIMM memory mirroring configuration is not
supported.
19 DIMM memory mirroring configuration is not
supported.
19
20 1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 20
21 1 2 3 4 5 6 7 8 9 10 11 12 13 15 17 19 20 21 22 23 24 21
22 22 DIMM memory mirroring configuration is not
supported.
22 DIMM memory mirroring configuration is not
supported.
22
23 23 DIMM memory mirroring configuration is not
supported.
23 DIMM memory mirroring configuration is not
supported.
23
24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24
Chapter 3. Server hardware setup 101