IBM 88371RU, Руководство по техническому обслуживанию и устранению неисправностей

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Table 2. Memory mirroring DIMM installation sequence (continued)
Pair DIMM pairs
3 Slots 5 and 6
4 Slots 7 and 8
v The server also supports memory sparing; however, the sparing feature is
mutually exclusive with mirroring. The sparing feature disables the failed memory
from the system configuration and activates a memory sparing pair of DIMMs to
replace the failed active DIMM pair.
Before you can enable the memory sparing feature, you must install one
additional pair of DIMMs. The memory sparing DIMM pair must be the same
speed, type, and the same size as or larger than the active DIMM pair.
To enable memory mirroring or sparing through the Configuration/Setup Utility
program, select Advanced Setup from the main menu, and select Memory
Configuration . For more information about using the Configuration/Setup Utility
program, see the User’s Guide on the IBM Documentation CD. See Table 3 for
memory-sparing DIMM connector assignments.
Table 3. Memory-sparing DIMM connector assignments
Active DIMM connectors Memory sparing DIMM connectors
1 and 2 3 and 4
Slots 1 and 2
Slots 3 and 4
5 and 6
Slots 1 and 2
Slots 3 and 4
Slots 5 and 6
7 and 8
v
When you restart the server after adding or removing a DIMM, the server
displays a message that the memory configuration has changed.
Installing memory modules
This section provides an overview of the procedure for installing memory modules.
Complete the following steps to install a DIMM:
1. Read Appendix B, “Safety information,” on page 129 and “Installation guidelines”
on page 15.
2. Turn off the server and peripheral devices, and disconnect the power cords and
external cables (see “Turning off the server” on page 10).
3. Remove the cover (see “Removing the cover” on page 18).
Attention:
v Avoid touching the components and gold-edge connectors on the DIMMs.
Make sure that the DIMMs are completely and correctly seated in the slots.
Incomplete insertion might cause damage to the system board or to the
DIMMs.
v
When you handle static-sensitive devices, take precautions to avoid damage
from static electricity. For information about handling these devices, see
“Handling static-sensitive devices” on page 16.
v To avoid breaking the retaining clips or damaging the DIMM slots, open and
close the clips gently. Do not force a DIMM into a slot.
4. Open the retaining clips on the DIMM connector.
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xSeries 336 Type 1879 and Type 8837: Hardware Maintenance Manual and Troubleshooting Guide