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maintained as a spare, only 75% of the installed memory is usable. For example, if six
1 GB DIMMs are installed, only four are actively used (the other two are used as spares),
so the maximum usable memory in this example is 4 GB.
In case of DIMM failure, a DIMM fault LED adjacent to the DIMM slot will light orange
to indicate the failed memory module.
To install or replace memory:
1 Follow the instructions in “Preventing static electricity discharge” on page 41. Make
sure that you turn off the server, then unplug the power cord(s) and all other cables
connected to the server.
2 Follow the instructions in “Opening the server case” on page 42.
3 Pull the plastic tabs away from the sides of the memory module slot. If you are
replacing a memory module, lift the old module out of the slot.
4 Align the notch on the new module with the notch in the memory module slot and
press the module firmly into the slot. The tabs on the sides of the memory slot should
secure the memory module automatically.
5 Follow the instructions in “Closing the server case” on page 44.
6 Turn on the server and open the BIOS setup utility. Verify the System Memory listed
in the Main menu. When you exit the BIOS setup utility make sure that the operating
system completely loads. If you receive an error, see “Memory” on page 137.
7 Follow the instructions in “Updating the FRU/SDR” on page 37.
8510522.book Page 68 Wednesday, March 16, 2005 11:19 AM