Lenovo ThinkSystem SR860 - Page 84

Installation order: memory sparing with four processors
Memory module installation order for memory sparing with four processors installed in the server.
The following tables show the DIMM population sequence for memory sparing when four processors are
installed.
• Processors 1 and 2 are installed on the system board.
• Processors 3 and 4 are installed in the processor and memory expansion tray.
Notes:
1. When adding one or more DIMMs during a memory upgrade, you might need to remove some DIMMs
that are already installed to new locations.
2. An even number of DIMMs is required for memory sparing.
3. This mode only applies to single-rank memory modules. When installing DIMMs consisting of more than
two ranks, including dual-rank, quad-rank or octal-rank memory modules, refer to
“Independent
memory mode” on page 59
instead.
Table 56. Memory sparing with four processors (processor 1 and 2)
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
8
7 8 19 20 8
10 5 6 7 8 19 20 10
12 5 6 7 8 17 18 19 20 12
14 5 6 7 8 17 18 19 20 14
16
5 6 7 8 17 18 19 20 16
18
5 6 7 8 9 10 17 18 19 20 18
20 5 6 7 8 9 10 17 18 19 20 21 22 20
22 5 6 7 8 9 10 17 18 19 20 21 22 22
24
5 6 7 8 9 10 17 18 19 20 21 22 24
26 3 4 5 6 7 8 9 10 17 18 19 20 21 22 26
28 3 4 5 6 7 8 9 10 15 16 17 18 19 20 21 22 28
30 3 4 5 6 7 8 9 10 15 16 17 18 19 20 21 22 30
32 3 4 5 6 7 8 9 10 15 16 17 18 19 20 21 22 32
34 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 34
36 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 23 24 36
38 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 23 24 38
40 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 23 24 40
42 1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 23 24 42
44 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 44
46 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 46
48 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48
Related DIMM population sequences for four processor systems:
• To continue populating processor 3 and 4 DIMMs, see
Table 57 “Memory sparing with four processors
(processor 3 and 4)” on page 77.
76
ThinkSystem SR860 Setup Guide