Lenovo ThinkServer TD100 Hardware Maintenance Manual page 118

v The following notes apply when the server operates in non-mirroring mode
v The amount of usable memory will be reduced depending on the system
v When you restart the server after adding or removing a DIMM, the server
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ThinkServer TD100 and TD100x: Hardware Maintenance Manual
changes. For more information on the Configuration/Setup Utility program, see
the User Guide. When you use online-spare memory, you must consider the
following information:
- You cannot enable online-spare memory while the server is operating in
mirroring mode.
- The minimum memory configuration is two single-rank DIMMs installed in
branch 0, DIMM connector 1 (in channel 0) and connector 4 (in channel 1);
however, online-sparing is not supported with this configuration.
- To support online-sparing in branch 0, you must add a second pair of
DIMMs. The spare pair of DIMMs can be single-rank or double-rank and
must be the same speed, type, size (or larger), and technology as the
failed pair of DIMMs. The spare pair must be installed in branch 0, DIMM
connector 2 (in channel 0) and connector 5 (in channel 1). However, if the
DIMMs are double-rank and you install the spare pair of DIMMs in branch
1, DIMM connector 7 (channel 2) and connector 10 (channel 3) rather than
branch 0, then branch 1 will support online-sparing and branch 0 will not.
- Branch 0 and branch 1 operate independently.
(normal mode):
– DIMMs must be installed in matched pairs. If you install a second pair of
DIMMs in DIMM connector 7 and DIMM connector 10, they do not have to be
the same size, speed, type, and technology as the DIMMs in DIMM connector
1 and DIMM connector 4. However, the size, speed, type, and technology of
the DIMMs that you install in DIMM connector 7 and DIMM connector 10 must
match each other.
– The following table shows the DIMM upgrade configuration sequence for
operating in non-mirroring mode (normal mode).
Table 16. DIMM upgrade configuration sequence in non-mirroring mode (normal)
Number of DIMMs
2
4
6
8
10 (ThinkServer TD100x Machine Types
4203, 4204, 4205, and 4206)
12 (ThinkServer TD100x Machine Types
4203, 4204, 4205, and 4206)
Note: For ThinkServer TD100 models (Machine Types 6398, 6399, 6419, 6429, 4203, and
4206), DIMM connectors 3, 6, 9, and 12 are not functional. Do not install DIMMs in these
connectors.
configuration. A certain amount of memory must be reserved for system
resources. To view the total amount of installed memory and the amount of
configured memory, run the Configuration/Setup Utility program and select
System Summary from the menu. For additional information, see the User
Guide.
displays a message that the memory configuration has changed.
DIMM connectors
1, 4
1, 4, 7, 10
1, 4, 7, 10, 2, 5
1, 4, 7, 10, 2, 5, 8, 11
1, 4, 7, 10, 2, 5, 8, 11, 3, 6
1, 4, 7, 10, 2, 5, 8, 11, 3, 6, 9, 12