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SMI Link Spare Lane Is Reported as
Faulty
Issue:
The Scalable Memory Interconnect (SMI) link that connects the
processor to a memory buffer includes a spare lane in each direction
to provide redundancy in the event that one of the other lanes in
the link fails. This spare lane will not be used unless one of the
other lanes in the link fails. Under certain rare circumstances this
spare lane is reported as faulty when booting the system. Oracle
ILOM will detect this error and diagnose a
fault.memory.intel.branch.spare-lane-failover fault that is
attributed to the memory riser to which the lane is routed. The
spare lane is provided only for redundancy and there is no impact to
normal system operation if the link does not experience an
additional lane failure. There is no performance impact associated
with this error.
Affected Hardware:
Workaround:
Clear the riser fault and power cycle the system using the
following Oracle ILOM command-line interface (CLI) command:
set
/SYS/MB/Px/MRy/
clear_fault_action=true
Where
Px/MRy
identifies the riser the fault was reported against. If the fault
recurs, contact your Oracle service representative.
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