fan module failures in chassis

[russ.givens]

I have two chassis almost fully populated with B200M2 blades with the cahssis cabled up to 2 6120xp fabric interconnects.  I'm continually getting Fan Modules in both chassis's saying that they are degraded because a fan is inoperable.  This happens about 20 times a day.  They clear themselves almost immediately, but I'm wondering why this is occurring.  If it was normal operation for the fans to stop working than these shouldn't be faults.  Has anybody else experienced this?

[Mathew Lewit]

Can you please let me know what version of firmware you are currently running?

[russ.givens]

1.4(1j)

Should have added that to begin with.

Thanks

[HAROLD MEIER]

We've been seeing the same thing also on 1.4(1j).

On an unrelated TAC call the engineer noticed this and mentioned that there's a bug for that. Unconfirmed.

[Mathew Lewit]

Will be hard to diagnose without tech-support files, but the defect they are probably referring to is this one.

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtl43716

There are some workarounds for this in the defect description. 

There are also still working to fix this defect in 1.4.

[HAROLD MEIER]

It looks like this has been addressed in 1.4(2b)

•Fans operating normally or at maximum speed no longer falsely show up in UCS Manager as inoperable. (CSCtl43716)

[Mathew Lewit]

The maintenance release is supposed to have a lot of fixes related to the fan issues we were seeing in the previous release.

[smccune]

Great!  We are still dealing with that issue in one of our UCS domains.  Fan module reseat fixed the issue for about two weeks but then it came back again.