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Applies to : DS60 All DD OS versions Symptoms : Alert: EVT-ENVIRONMENT-00004 – Power module B fan 2 has failed. Affected platform: DS60 enclosure , all DD OS versions. Commonly seen in quarter or half-populated DS60 units . CLI output from #enclosure show fans shows # enclosure show fans Enclosure 2 Fans Description Level Status -------------------- ----- ------ Cooling module fan 1 low OK Cooling module fan 2 low OK Cooling module fan 3 low OK Power module A fan 1 low OK Power module A fan 2 low OK Power module B fan 1 low OK Power module B fan 2 low FAILED <<<------ -------------------- ----- ------ This KB applies when: Power Module B Fan 2 reports FAILED in DS60 enclosure No associated thermal alerts exist PSU status remains healthy The enclosure is partially populated
Engineering investigation indicates the alert may occur in partially populated DS60 enclosures due to the interaction between enclosure airflow characteristics and PSU adaptive cooling behavior. In affected cases: PSU functionality remains normal. Returned PSUs frequently test healthy. Replacing the PSU may temporarily clear the alert. The alert may reoccur later.
To clear the false alert: Reseat the affected PSU : Disconnect AC power from the PSU. Remove the PSU from its slot. Wait 20 seconds. Reinsert the PSU and reconnect AC power. Verify system status using: #enclosure show powersupply #enclosure show fans #alerts show current If the alert persists: Swap the PSU with a known-good unit from another DS60 enclosure (if available). If unresolved, contact your Service Provider and raise a Support Request. Note: This issue does not pose an immediate operational risk, but should be addressed to prevent alert fatigue and unnecessary hardware replacements.
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