Software and configuration utilities 173
Error detected during runtime
Memory error log
The BIOS support runtime memory ECC error detection and log.
With ECC in operation, in the process of every fetch from memory, the data and ECC bits are examined
for each 64-bit data + 8-bit ECC group.
If the ECC computation indicates that a single bit Correctable Error (CE) has occurred, it is corrected and
the corrected data is passed on to the processor. If a multi-bit is detected, it cannot be corrected and is
handled as an Uncorrectable Error (UCE).
For either of these two events is generated, it is logged to BMC as SEL log.
[7] Assertion [6:0] Event Trigger
Bit[7:4]: 0xA OEM data
in Event Data2 & Event
Data3
Bit[3:0]: Error Type
Uncorrectable Memory
Error
Correctable ECC error
logging limit reached
[7:1] Memory Controller
Number
DIMM Location:
Bit[7:6]: CPU Socket
Number
Bit[5:4]: Channel
Number
Bit[3:0]: DIMM Number
[7:6]: ‘b00 = Skt0
[5:4]: ‘b00 = Ch10
[3:0] ‘b0000 = Dim0
Notes: Physical Memory
Channel Number =
Memory Controller Number
* 3 + Channel Number
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