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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.
v The following notes apply when the server operates in non-mirroring mode
(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 DIMM connectors
21,4
4 1,4,7,10
6 1, 4, 7, 10, 2, 5
8 1, 4, 7, 10, 2, 5, 8, 11
10 (ThinkServer TD100x Machine Types
4203, 4204, 4205, and 4206)
1, 4, 7, 10, 2, 5, 8, 11, 3, 6
12 (ThinkServer TD100x Machine Types
4203, 4204, 4205, and 4206)
1, 4, 7, 10, 2, 5, 8, 11, 3, 6, 9, 12
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.
v The amount of usable memory will be reduced depending on the system
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.
v When you restart the server after adding or removing a DIMM, the server
displays a message that the memory configuration has changed.
100 ThinkServer TD100 and TD100x: Hardware Maintenance Manual
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