Oracle Exadata Storage Server X7-2 EF, Service Manual

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DIMM Operating Speeds
DIMM Operating Speeds
The maximum supported memory speed is 2666 MT/s. However, not all system configurations
support operation at this speed. The maximum attainable memory speed is limited by the
maximum speed supported by the specific type of processor. All memory installed in the system
operates at the same speed, or frequency.
Inconsistencies Between DIMM Fault Indicators and the
BIOS Isolation of Faulty DIMMs
When a single DIMM is marked as failed by Oracle ILOM (for example,
fault.memory.
intel.dimm.training-failed
is listed in the service processor Event Log), BIOS might
disable the entire memory channel that contains the failed DIMM, up to two DIMMs. As a
result, none of the memory installed in the disabled channel is available to the operating system.
However, when the Fault Remind button is pressed, only the fault status indicator (LED)
associated with the failed DIMM lights. The fault LEDs for the other DIMMs in the memory
channel remain off. Therefore, you can correctly identify the failed DIMM using the lit LED.
Using the Server Fault Remind Button
When the server 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 component failure. If this LED does not light when
you press the Fault Remind button, it is likely that the capacitor powering the fault remind
circuit lost its charge. This can happen if the Fault Remind button is pressed for several minutes
with fault LEDs lit or if power is removed from the server for more than 15 minutes.
The following figure shows the location of the Fault Remind button.
104 Oracle Exadata Storage Server X7-2 EF and HC Service Manual • May 2018