Use this information to solve memory problems.
The amount of system memory that is displayed is less
than the amount of installed physical memory
Complete the following steps until the problem is solved.
- Make sure that:
- You have installed the correct type of memory (see Installing a DIMM).
- Memory mirroring or memory sparring mode does not account for
the discrepancy. You can check the memory configuration in the Setup
utility (see Using the Setup utility).
- If new memory has recently been installed, make sure that no configuration
events are reported in the event log. If there are any events, resolve
them.
- If the compute node was recently installed, moved, or serviced,
make sure that the DIMMs are correctly seated in the connectors (see Installing a DIMM).
- Make sure that all DIMMs are enabled. The compute node might have
automatically disabled a DIMM when it detected a problem, or a DIMM
might have been manually disabled (see Using the Setup utility).
- Run memory diagnostics (see IBM Dynamic System Analysis).
- Remove DIMMs until the compute node is showing the correct
amount of memory. Install one DIMM at a time until you can determine
which DIMM is not working properly. Remove that DIMM and replace it
with a good DIMM (see Removing a DIMM, and Installing a DIMM).
Note: After
you install or remove a DIMM, you must change and save the new configuration
information by using the Setup utility. When you turn on the compute
node, a message indicates that the memory configuration has changed.
Start the Setup utility and select
Save Settings (see
Using the Setup utility for more information) to save changes.
- If the problem remains, contact IBM Support.