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Cisco Bug: CSCuw44524 - C460M4, B260M4 or B460M4 IVB clear CMOS can cause memory UECC Error

Last Modified

Feb 27, 2018

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

2.0(5)B 2.0(6d) 2.2(6c)B

Description (partial)

Symptom:
When using 2.0.6d or 2.0.8d for E7 V2 processors on C460M4 (standalone), and a clear CMOS BIOS operation was performed, the following error can show up which may eventually cause server to reboot or crash.

Also, when using 2.2.5 and later releases for E7 V2 processors on C460M4 (UCSM), B260M4 or B460M4, and a clear CMOS BIOS operation was performed, the following error can show up which will eventually cause server to reboot or crash.

System Event Log:
    Time: 2015-09-21 22:12:50
    Severity: Critical
    Description: "System Software event: Memory sensor, Uncorrectable ECC error, DIMM socket 1, Channel A, Memory Riser 2, Processor Socket 1. was asserted"
System Event Log:
    Time: 2015-09-21 22:12:50
    Severity: Critical
    Description: "System Software event: Memory sensor, Uncorrectable ECC error, DIMM socket 1, Channel A, Memory Riser 2, Processor Socket 1. was asserted"
System Event Log:
    Time: 2015-09-21 22:02:05
    Severity: Normal
    Description: "P_CATERR_N: Processor sensor, Predictive Failure deasserted"

Conditions:
2.0.6 is the first release that supports both E7 V2 and V3 processors for C460M4 (standalone) so it will not occur with any release prior to 2.0.6. Similarly, 2.2.5 is the first release that supports both E7 V2 and V3 processors for C460M4 (UCSM), B260M4 or B460M4 so it will not occur with any release prior to 2.2.5.
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