Lenovo ThinkAgile CP Part Replacement And Component Maintenance Procedures page 49
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Memory mirroring population sequence
Table 4. DIMM installation sequence (mirror mode/lockstep mode)
Number of processors
Processor 1 installed
Processor 1 and 2 installed
If you are installing 3, 6, 9 or 12 identical DIMMs for the mirroring mode, comply with the following installation
sequence to achieve the best performance.
Table 5. DIMM installation sequence (mirror mode/lockstep mode for 3, 6, 9 and 12 identical DIMMs)
Number of processors
Processor 1 installed
Processor 1 and 2 installed
Memory rank sparing population sequence
Table 6. DIMM installation sequence (sparing mode)
Number of processors
Processor 1 installed
Processor 1 and 2 installed
Note: Single-rank RDIMM is not supported by sparing. If you install single-rank RDIMM, it switches to the
independent mode automatically.
Install DIMM
Use this information to install a DIMM.
Chapter 3 "Read
the
Installation
Guidelines" on
page 9
Attention: Memory modules are sensitive to static discharge and require special handling. In addition to the
standard guidelines for "Handling static-sensitive devices" on page 11:
• 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 touch. 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.
• Handle memory modules with care: never bend, twist, or drop a memory module.
Procedure performed by: customer or field service
The following illustration shows the location of the DIMM connectors on the system board. The following
illustration shows the location of the DIMM connectors on the system board.
Installation sequence (connectors)
(6, 7), (2, 3), (8, 1)
(6, 7, 14, 15), (2, 3), (10, 11), (1,8), (9, 16)
Installation sequence (connectors)
(6, 7, 8), (1, 2, 3)
(6, 7, 8), (14, 15, 16), (1, 2, 3), (9, 10, 11)
Installation sequence (connectors)
6, 3, 7, 2, 8, 1, 5, 4
6, 14, 3, 11, 7, 15, 2, 10, 8, 16, 1, 9, 5, 13, 4, 12
"Power off
the compute
node" on page
.
Chapter 5
Compute block maintenance procedures
"ATTENTION:
Static Sensitive Device
Ground package before
opening" on page 11
43
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