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E4024 all power canister fans fail and temperature sensor unknown

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Applies to

NetApp E-Series E4024

Issue

  • All power canister fan statuses show as Fail in SANtricity
  • Temperature sensor statuses display as UNKNOWN
  • Multiple critical events in Major Event Log (MEL) and Recovery Guru:
    • FAILED_FAN
    • TEMP_SENSOR_UNKNOWN_STAT
    • WB_CACHING_FORCIBLY_DISABLED
  • Both power-fan canisters affected
  • Persistent issue, not resolved by controller reboot or power-fan canister replacement
  • No recent configuration changes or maintenance

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