Config = Sparing
Post-SFO4
UE
UE SEL message
identifying FBDIMM
location
DIMM Fault LED:
On for the failed pair of
FBDIMMs in lock-step
mode or for the failed
FBDIMM in single-
channel mode.
System Fault LED:
Amber on.
Set DIMM State:
DIMM failure status = Y
Set Memory RAS Redun. State:
Set Memory RAS Configuration:
No change
The system asserts an NMI.
Config = Mirror
Current State:
Redundant
CE < Threshold2
CE SEL message
identifying FBDIMM
location
DIMM Fault LED:
No change
System Fault LED:
No change
Set DIMM State:
Set Memory RAS Redun. State
Set Memory RAS Configuration:
No change
Operating system continues to operate normally. The
BIOS masks all correctable errors.
Config = Mirror
Current State:
Redundant
CE = Threshold
CE SEL message
identifying FBDIMM
location
CE Threshold Reached
SEL message
identifying FBDIMM
location
DIMM Fault LED: On for the
failed FB-DIMM only
System Fault LED:
Green blink
Set DIMM State:
DIMM failure status = Y
DIMM disabled status = Y
Set Memory RAS Redun. State
Set Memory RAS Configuration:
No change
Operating system continues to operate normally. The
BIOS does not respond to further correctable errors on
this lock-stepped FBDIMM pair.
Config = Mirror
Current State:
Redundant
CE > Threshold
No action. DIMM Fault LED:
No change
System Fault LED:
No change
Set DIMM State:
Set Memory RAS Redun. State
Set Memory RAS Configuration:
No change
Operating system continues to operate normally.
Config = Mirror
Current State:
Redundant
UE
Transition to non-
redundant mode
UE SEL message
identifying FBDIMM
location
Redundancy Loss
DIMM Fault LED:
On for the failed pair
System Fault LED:
Green blink
Set DIMM State:
DIMM failure status = Y
DIMM disabled status = Y
For all FBDIMMs on the failed
branch / group
Set Memory RAS Redun. State:
Set Memory RAS Configuration:
Redundancy Lost
The system transitions to non-redundant mode in the
following circumstances:
AMB fast reset fails on branch generating the
error.
AMB fast reset succeeds on both branches but
memory write retry fails.
See Section 14.2.14.4.4 for more information.
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