Table of Contents
Advertisement
Memory problems
Use this information to resolve issues related to memory.
• "Displayed system memory is less than installed physical memory" on page 409
• "Multiple rows of DIMMs in a branch identified as failing" on page 410
• "DIMM PFA issue" on page 410
Displayed system memory is less than installed physical memory
Complete the following steps until the problem is resolved.
Note: Each time you install or remove a DIMM, you must disconnect the server from the power source; then,
wait 10 seconds before restarting the server.
1. Make sure that:
• Memory modules from different vendors are not in the same channel.
• No error LEDs are lit on the operator information panel.
• No DIMM error LEDs are lit on the system board.
• Memory mirrored channel does not account for the discrepancy.
• The memory modules are seated correctly.
• You have installed the correct type of memory.
• If you changed the memory, you updated the memory configuration in the Setup utility.
• All banks of memory are enabled. The server might have automatically disabled a memory bank when
it detected a problem, or a memory bank might have been manually disabled.
• There is no memory mismatch when the server is at the minimum memory configuration.
2. Reseat the DIMMs and then restart the server.
3. Run the memory module diagnostics. When you start a server and press F1, the Lenovo XClarity
Provisioning Manager V3 interface is displayed by default. You can perform memory diagnostics from
this interface. From the Diagnostic page, click Run Diagnostic ➙ Memory test.
4. Check the POST error log:
• If a DIMM was disabled by a systems-management interrupt (SMI), replace the DIMM.
• If a DIMM was disabled by the user or by POST, reseat the DIMM; then, run the Setup utility and
enable the DIMM.
5. Reseat the DIMM.
6. Restart the server.
.
Chapter 5
Problem determination
409
Advertisement
Table of Contents
