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AFF A700s CECC: Correctable Machine Check Errors being reported against wrong DIMM

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Applies to

  • AFF A700s
  • ONTAP 9
    • ONTAP 9.1P17 and earlier
    • ONTAP 9.3P11 and earlier
    • ONTAP 9.4P6 and earlier

Issue

The CECC error is reported in the same DIMM even after a replacement:

  • The system health alert show command reports errors similar to the following on the cluster:

Node                  xxxxxx
Monitor               controller
Alert ID              CriticalCECCCountMemErrAlert
Alerting Resource     DIMM-x
Subsystem             Memory
Indication Time       Tue Oct 09 12:24:36 2018
Perceived Severity    Critical
Probable Cause        DIMM_Degraded
Description           The DIMM has degraded, leading to memory errors.

  • The EMS log displays a message similar to the following, reporting CECC error on the specific DIMM:


[?] Tue Oct 09 12:24:36 IST [xxxx: mgwd: callhome.hm.alert.critical:alert]: Call home for Health Monitor process nphm: CriticalCECCCountMemErrAlert[DIMM-x].

  • Normally, a replacement of this DIMM is suggested.
  • However, even after the replacement, the errors in the same DIMM might be reported by the cluster.

 

 

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