Lenovo ThinkSystem SR550 Maintenance Manual page 136
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- Setup manual (120 pages) ,
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- Manual (66 pages)
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Table 14. Independent mode with one processor
Total memory
modules
6
1
2
3
4
5
6
6
The following table shows the memory module population sequence for independent mode when two
processors (CPU1 and CPU2) are installed.
Notes:
• If there are three identical memory modules to be installed for CPU1, and the three memory modules have
the same Lenovo part number, install the three memory modules in slots 1, 2, and 3.
• If there are three identical memory modules to be installed for CPU2, and the three memory modules have
the same Lenovo part numbers, install the three memory modules in slots 7, 8, and 9.
Table 15. Independent mode with two processors
Total
memory
12
11
modules
2
3
4
5
6
7
11
8
11
9
11
10
11
11
12
11
12
Mirroring mode
In mirroring mode, each memory module 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 memory modules to be installed must be the same type with the same capacity, frequency,
voltage, and rank.
ThinkSystem SR550 Maintenance Manual
128
Processor 1
5
4
4
4
5
4
5
4
5
4
Processor 2
10
9
8
9
9
10
9
10
9
10
9
8
10
9
8
10
9
8
10
9
8
10
9
8
10
9
8
10
9
8
3
2
3
3
3
2
3
2
3
2
3
2
Processor 1
7
6
5
4
4
4
4
4
5
4
5
4
5
4
7
5
4
7
6
5
4
7
6
5
4
Total memory
modules
1
1
2
3
4
1
5
1
6
Total
memo-
ry
3
2
1
mod-
ules
3
2
3
3
3
4
3
2
5
3
2
6
3
2
7
3
2
8
3
2
1
9
3
2
1
10
3
2
1
11
3
2
1
12
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