Lenovo ThinkSystem SR650 Maintenance Manual page 144
2u rack server
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- Setup manual (226 pages) ,
- Product manual (87 pages) ,
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Table 11. Independent mode with two processors (continued)
Total
DIMMs 24 23 22 21 20 19 18 17 16 15 14 13
18
24
22
19
24
22
20
22 21 20 19 18 17 16 15 14 13
21
24
22
22
24
22 21 20 19 18 17 16 15 14 13
23
24
22 21 20 19 18 17 16 15 14 13
24
24 23 22 21 20 19 18 17 16 15 14 13
Mirroring mode
In mirroring mode, each DIMM in a pair must be identical in size and architecture. The channels are grouped
in pairs with each channel receiving the same data. One channel is used as a backup of the other, which
provides redundancy.
Note: All DIMMs to be installed must be the same type with the same capacity, frequency, voltage, and
ranks.
The following table shows the DIMM population sequence for mirroring mode when only one processor
(CPU1) is installed.
Table 12. Mirroring mode with one processor
Total
DIMMs
12
11
2
3
4
6
12
8
9
12
12
12
11
The following table shows the DIMM population sequence for mirroring mode when two processors (CPU1
and CPU2) are installed.
Table 13. Mirroring mode with two processors
Total
DIMMs 24 23 22 21 20 19 18 17 16 15 14 13
4
5
6
7
136
ThinkSystem SR650 Maintenance Manual
Processor 2
20
18 17 16 15 14 13
20
18 17 16 15 14 13
20
18 17 16 15 14 13
10
9
8
10
8
10
8
10
9
8
10
8
10
9
8
Processor 2
17
15
17
15
17
15
17
15
12 11 10
9
8
12
10
8
10
9
8
10
9
8
12 11 10
9
8
12
10
9
8
12 11 10
9
8
12 11 10
9
8
Processor 1
7
6
5
5
5
5
5
7
6
5
6
5
7
6
5
12 11 10
9
8
13
13
10
8
Processor 1
7
6
5
4
3
2
6
5
4
3
2
7
6
5
4
3
2
7
6
5
4
3
2
7
6
5
4
3
2
7
6
5
4
3
2
7
6
5
4
3
2
7
6
5
4
3
2
4
3
2
3
3
3
3
4
3
4
3
2
4
3
2
Processor 1
7
6
5
4
3
2
5
3
5
3
5
3
5
3
Total
1 DIMMs
1
18
1
19
1
20
1
21
1
22
1
23
1
24
Total
1
DIMMs
2
1
3
4
1
6
8
1
9
1
12
Total
1 DIMMs
4
1
5
1
6
7
- Quick Links:
- DIMM Installation Rules
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