We have a 5108 Chassis which was working perfectly but last week our Fan Modules started to work with full speed without any specific fault or event message.
When i check the Fan status from the UCSM everything seems "OK" but the fan speeds are between 9000-9200 RPM all the time. There is no temperature issue on any of the components inc. IOMs, Blades etc.
And i didn't upgraded the firmware to 2.2.x yet. Still using 2.1.1a.
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Thank you for the advice, i upgraded the system to 2.1.1f and now Fan Speeds like 4000-4600 RPM. But i'll keep my eyes on them for a while just to be sure.
see my post before and go to that thread... 2.2.5 should handle this way better but you may still need to clear the i2C bus if this problem comes from a while ago.
Try to confirm if you are facing I2C issues with the commands I suggested in this thread: https://supportforums.cisco.com/discussion/12133126/ucs-chassis-fans ; and post the results here to give you an idea about the output.
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we have exactly the same problem with a BE7000 server, expect that the commands show here dont work in this environment.
Any idea on how to troubleshoot this?
The commands outlined in this thread are for B series servers... BE7000 is a rack server... you need to confirm if something is not letting air flow as it should and confirm the Fan Control Policy in use:
If you have issues with the fans on a rack server, you better open a TAC case for us to check it out for you.
Thank you Keny,
I will opena TAC hen, it all seem fine and we have no temperature allarm. So it could be a similar issue as described here for B server series, excpect that I don't have the commands to debug it.
the issue described in this thread is exclusive of the I2C bus which the rack servers lack or use in a totally different way.
High RPMs on rack servers are usually caused by other conditions.