Lenovo ThinkSystem SR550 - Install a Memory Module

Table 18. Rank sparing mode with one processor (continued)
Total memory
modules
Processor 1
Total memory
modules
6 5 4 3 2 1
5 5 4 3 2 1 5
6 6 5 4 3 2 1 6
The following table shows the memory module population sequence for rank sparing mode when two
processors (CPU1 and CPU2) are installed.
Table 19. Rank sparing mode with two processors
Total
memory
mod-
ules
Processor 2 Processor 1
Total
memory
modules
12 11 10 9 8 7 6 5 4 3 2 1
2 9 3 2
3 9 4 3 3
4 10 9 4 3 4
5 10 9 4 3 2 5
6 10 9 8 4 3 2 6
7 10 9 8 5 4 3 2 7
8 11 10 9 8 5 4 3 2 8
9 11 10 9 8 5 4 3 2 1 9
10 11 10 9 8 7 5 4 3 2 1 10
11
11 10 9 8 7 6 5 4 3 2 1 11
12 12 11 10 9 8 7 6 5 4 3 2 1 12
Install a memory module
Use this information to install a memory module.
“Read the
installation
Guidelines” on
page 53
“Power off
the server
for this task”
on page 13
“ATTENTION:
Static Sensitive Device
Ground package before opening”
on page 56
Attention:
• Disconnect all power cords for this task.
• Memory modules are sensitive to static discharge and require special handling. Refer to the standard
guidelines for “Handling static-sensitive devices” on page 56:
– Always wear an electrostatic-discharge strap when removing or installing memory modules.
Electrostatic-discharge gloves can also be used.
– Never hold two or more memory modules together so that they do not touch each other. Do not stack
memory modules directly on top of each other during storage.
– Never touch the gold memory module connector contacts or allow these contacts to touch the outside
of the memory module connector housing.
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ThinkSystem SR550 Maintenance Manual