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Cisco Bug: CSCup07488 - IPMI DIMM fault sensor is setting Dimm Degraded with no error count.

Last Modified

Jun 30, 2020

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

2.2(1.178)B 2.2(2.131)B 2.2(2.146)B 2.2(2.178)B 2.2(2.189)B 2.2(2c)B

Description (partial)

Symptom:
ECC sensors read Upper Non-Recoverable, without any record of ECC related SEL events in the log files.  PECI failures are usually present in /var/log/messages or in obfl/obfl.log.  Failing PECI transactions are not being handled correctly and bad data is being read by the ECC sensors. It will also set the DIMM to a Degraded state and the false alerts will appear in UCSM.

Conditions:
This occurs when failed PECI transactions are present on the blade, and commonly right after the host OS is booting.  Frequently during the first scan of the ECC sensors.
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