Inconsistencies Between Dimm Fault Indicators And The Bios Isolation Of Faulty Dimms; Using The Fault Remind Button - Sun Oracle Sun Server X4-2 Service Manual

Inconsistencies Between DIMM Fault Indicators
and the BIOS Isolation of Faulty DIMMs
When a single DIMM is marked as faulty by Oracle ILOM (for example,
fault.memory.intel.dimm.training-failed is listed in the SP Event Log),
BIOS might disable the entire memory channel that contains the faulty DIMM as
failing, that is, up to two DIMMs. As a result, the memory available to the operating
system is reduced. However, when the Fault Remind button is pressed, only the fault
status indicator (LED) associated with the faulty DIMM lights. The fault LED for the
other DIMM in the memory channel remains off. Therefore, you can correctly
identify the faulty DIMM.
When the faulty DIMM is replaced, the memory available to the operating system
returns to normal. If the DIMM fault message in Oracle ILOM is not cleared under
Open Problems, you must manually clear the fault in Oracle ILOM. For instructions
for manually clearing a DIMM fault, see the procedure "Clear Faults for Undetected
Replaced or Repaired Hardware Components" in the Oracle Integrated Lights Out
Manager (ILOM) 3.1 User's Guide in the Oracle Integrated Lights Out Manager (ILOM)
3.1 Documentation Library at http://www.oracle.com/goto/ILOM/docs.

Using the Fault Remind Button

When the Fault Remind button is pressed, an LED located next to the Fault Remind
button lights green to indicate that there is sufficient voltage present in the fault
remind circuit to light any fault LEDs that were lit due to a failure. If this LED fails to
light when you press the Fault Remind button, it is likely that the capacitor powering
the fault remind circuit has lost its charge. This can happen if the Fault Remind
button is pressed for a long time with fault LEDs lit or if power has been removed
from the server for more than 15 minutes.
The following figure shows the location of the Fault Remind button.
70 Sun Server X4-2 Service Manual • May 2014