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New Member

5108 Chassis Fan Speed Issue

Hi everyone,

 

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. 

 

Any idea?

 

Thanks.

 

B

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Most likely one of the couple

Most likely one of the couple of i2c problems. Purely from description. 

You might want to jump to at least 2.1.1f due to CSCue4936

or something newer due to CSCui41165

 

M.

11 REPLIES
Cisco Employee

Most likely one of the couple

Most likely one of the couple of i2c problems. Purely from description. 

You might want to jump to at least 2.1.1f due to CSCue4936

or something newer due to CSCui41165

 

M.

New Member

Thank you for the advice, i

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.

 

Regards,

Burak

New Member

Hello I have the same issue

Hello I have the same issue with one new UCS wit FW 225b

What can i do?

Does the 225c have this fixed?

 

Ttx

Steve

see my post before and go to

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.

 

-Kenny

Hi B, Try to confirm if you

Hi B,

 

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.

 

Please rate ALL helpful answers

-Kenny

New Member

Hello Everyone,we have

Hello Everyone,

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?

Thanks,

F.

The commands outlined in 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:

http://www.cisco.com/en/US/docs/unified_computing/ucs/c/sw/gui/config/guide/1.5/b_Cisco_UCS_C-series_GUI_Configuration_Guide.151_chapter_011.html#concept_8CB787DF70304E98BE25D120466418B9

 

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.

 

 

-Kenny

New Member

Thank you Keny, I will opena 

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.

Francesco

 

the issue described in this

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.

 

-Kenny

New Member

OK, that's useful information

OK, that's useful information.

I guess we will need a TAC case opened for this, as all the server flags are OK:

 

Check you Fan Control Policy

Check you Fan Control Policy and tune from there and then see if ti goes away, if it does not, then open a TAC case.

 

 

-Kenny

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