• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
• Go to the IBM support website at http://www-947.ibm.com/support/entry/portal/overview to check for
technical information, hints, tips, and new device drivers or to submit a request for information.
Symptom
Action
• There is no memory mismatch when the server is at the minimum memory
configuration.
2. Reseat the DIMMs, and then restart the server.
3. 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.
4. Check that all DIMMs are initialized in the Setup utility; then, run memory
diagnostics (see “Running DSA Preboot diagnostic programs” on page 57).
5. Reverse the DIMMs between the channels (of the same microprocessor), and
then restart the server. If the problem is related to a DIMM, replace the failing
DIMM.
6. Re-enable all DIMMs using the Setup utility, and then restart the server.
7. (Trained technician only) Install the failing DIMM into a DIMM connector
for microprocessor 2 (if installed) to verify that the problem is not the
microprocessor or the DIMM connector.
8. (Trained technician only) Replace the system board.
Multiple DIMMs in a channel
are identified as failing.
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. Reseat the DIMMs; then, restart the server.
2. Remove the highest-numbered DIMM of those that are identified and replace
it with an identical known good DIMM; then, restart the server. Repeat as
necessary. If the failures continue after all identified DIMMs are replaced, go
to step 4.
3. Return the removed DIMMs, one at a time, to their original connectors, restarting
the server after each DIMM, until a DIMM fails. Replace each failing DIMM
with an identical known good DIMM, restarting the server after each DIMM
replacement. Repeat step 3 until you have tested all removed DIMMs.
4. Replace the highest-numbered DIMM of those identified; then, restart the
server. Repeat as necessary.
5. Reverse the DIMMs between the channels (of the same microprocessor), and
then restart the server. If the problem is related to a DIMM, replace the failing
DIMM.
6. (Trained technician only) Install the failing DIMM into a DIMM connector
for microprocessor 2 (if installed) to verify that the problem is not the
microprocessor or the DIMM connector.
7. (Trained technician only) Replace the system board.
Microprocessor problems
Use this information to solve microprocessor problems.
63
Summary of Contents for NeXtScale nx360 M4
Page 1: ...IBM NeXtScale nx360 M4 Installation and Service Guide Machine Type 5455 ...
Page 6: ...iv IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 34: ...20 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 58: ...44 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 94: ...80 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 192: ...178 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 538: ...524 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 562: ...548 IBM NeXtScale nx360 M4 Installation and Service Guide ...
Page 722: ......
Page 730: ......
Page 737: ......
Page 738: ...Part Number 00KC216 Printed in China 1P P N 00KC216 1P00KC216 ...