IBM 88371RU Maintenance And Troubleshooting Manual page 43

v You can increase the amount of memory in the server by replacing them with
higher-capacity DIMMs or installing an additional pair of DIMMs into the
remaining slots. Figure 25 shows the memory slots on the system board.
Slot 8
Slot 1
Figure 25. Memory module installation
Note: When installing additional DIMMs, always install in pairs starting with slots
1 and 2.
v The server supports Chipkill
function with one bad chip on a DIMM. The bad memory module must be on an
x4 DIMM. The 256 MB and 512 MB DIMMs that are x8 DIMMs do not support
Chipkill memory (see Table 1).
Table 1. Supported Chipkill memory configurations
DIMM size Type
256 MB 32Mx8
512 MB 64Mx8
512 MB 64Mx4
1 GB 128Mx4
2 GB 256Mx4
v You can configure the server to use memory mirroring. Memory mirroring stores
data in two pairs of DIMMs simultaneously. When using memory mirroring, you
must install two pairs of DIMMs at a time. All the DIMMs you use in memory
mirroring must be identical. See Table 2 for the DIMM pairs that are in each pair.
Note: The use of memory mirroring decreases the amount of available memory
by half.
Table 2. Memory mirroring DIMM installation sequence
Pair DIMM pairs
1 Slots 1 and 2
2 Slots 3 and 4
™
memory technology, which enables the server to
Supported by
Chipkill
No
No
Yes
Yes
Yes
Chapter 3. Customer replaceable units
Minimum Maximum
512 MB 2 GB
1 GB 4 GB
1 GB 4 GB
2 GB 8 GB
4 GB 16 GB
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