Memory problems - Flex System x440 Compute Node

Use this information to solve memory problems.

Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. See Parts listing, Types 7917, 7167, 2590 and 2584 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU) that must be replaced only by a trained service technician. If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician.
The amount of system memory that is displayed is less than the amount of installed physical memory.	Make sure that: You have installed the correct type of memory (see Installing a DIMM). Memory mirroring or memory sparing 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 Preboot diagnostic program). Remove DIMMs until the compute node is showing the correct amount of memory. Install one DIMM at a time until you can determine the DIMM that 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. Contact IBM Support.

Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
See Parts listing, Types 7917, 7167, 2590 and 2584 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU) that must be replaced only by a trained service technician.
If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician.

Symptom

Action

The amount of system memory that is displayed is less than the amount of installed physical memory.

Make sure that:
1. You have installed the correct type of memory (see Installing a DIMM).
2. Memory mirroring or memory sparing 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 Preboot diagnostic program).
Remove DIMMs until the compute node is showing the correct amount of memory. Install one DIMM at a time until you can determine the DIMM that 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.
Contact IBM Support.