Diagnostic
flowcharts 104
Memory problems
1.
Server fails to recognize existing memory:
o
Be sure the server supports the memory modules.
o
Be sure the memory modules are correctly installed in a supported configuration.
o
Be sure the memory modules are properly seated.
o
Reseat the memory.
o
Use a known working memory module to test each slot to determine there is a problem with the
slot.
o
Test each bank of DIMMs by removing all other DIMMs. Then, isolate the failed DIMM by
switching each DIMM in a bank with a known working DIMM.
2.
Server fails to recognize new memory:
o
Be sure the server supports the new memory modules.
o
Be sure the new memory is the correct type for the server and is installed correctly.
o
Be sure no conflicts are occurring with existing memory.
o
Use a known working memory module to test each slot to determine if there is a problem with
the slot.
o
Reseat the new memory.
3.
Invalid memory configuration:
o
DIMMs are installed when no corresponding processor is detected.
Description: A processor must be installed to use memory.
Action: Populate the processor socket or remove the DIMM.
o
DIMM size parameters not supported:
Possible cause: The installed memory module is an unsupported size.
Action: Install a memory module of a supported size.
o
Incomplete bank detected in bank X.
Possible cause: The bank is missing one or more
DIMMs. Action: Fully populate the memory bank.
o
Mismatched DIMMs within DIMM Bank.
Possible cause: The installed DIMMs in the same bank are of different sizes.
Action: Install correctly matched DIMMs.
o
Unsupported DIMM in Socket X.
Possible cause: Unregistered DIMMs or insufficient DIMM timings.
Action: Install registered ECC DIMMs.
4.
Memory configuration warning
The DIMM in socket X does not have a primary width of 4 and only supports standard ECC.
Advanced ECC does not function when mixing DIMMs with primary widths of x4 and x8.
Possible cause: The installed DIMMs have a primary width of x8.
Action: Install DIMMs that have a primary width of x4 if advanced ECC memory support is required.
5.
DIMM initialization error
Receive enable error. Cannot train memory.
