How to Detect a Bad Fan or Fan Tray Failure
46744
Created On 07/10/19 02:22 AM - Last Modified 02/12/22 00:02 AM
Objective
To detect if there is a fan or fan tray failure on a Firewall or Panorama appliance and if an RMA Request should be opened with Support.
Environment
- Firewall
- Panorama Appliance
Procedure
- Find the output of the show system environmentals command to get a summary of the alarm status on the device for various components. Look for the output which has the 'Alarm' category set to 'True' to detect failures:
> show system environmentals
----Fans----
Slot Description Alarm RPMs Min RPM
S1 Fan #1 RPM False 14160 2500
S1 Fan #2 RPM False 14210 2500
S1 Fan #3 RPM False 14310 2500
S1 Fan #4 RPM True 0 2500
- Check the system logs for further indication of any failures detected by the system
> show log system critical general general 0 Chassis Master Alarm: Fans critical hw fan-fai 0 Alarm on Fan #4 RPM
- Check the ehmon.log or chasd.log for alarms
> less mp-log ehmon.log Sensor Alarm [True ]: Fan #4 Operational = False
> less mp-log chasd.log Setting fan 0 speed to 137 (96 to 255) for 0.26 Setting fan 0 speed to 111 (96 to 255) for 0.09 Setting fan 0 speed to 96 (96 to 255) for 0.00 Chassis Master Alarm: Fans
- If a faulty fan or fan tray has been identified, then a case needs to be opened with support for RMA processing. See KB below