Dell PowerEdge 1800 BMC Fan 1 running at full speed

The BMC Fan 1 (the one at the front) in my Dell PowerEdge 1800 has been running at 4800 RPM for the past few days - BMC Fan 2 running at 1425

This is making the system quite noisy.

BIOS A07
BMC Version 1.84
BMC IPMI Version 1.5

Temperatures and other items seem fine, ESM Logs have been deleted, no change - can post DEST Report if it would help

Not sure if it's a setting I haven't found or if the fan needs replacing
LVL 30
Mike LazarusAct! Evangelist - CRM ConsultantAsked:
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charlestasseCommented:
There are a few things that can cause this
1) Firmware on the BMC, reflash this even if you are at the current level
2) On fan is compensating for low RPM on other fans
3) over temp in one area of the server
4) loose connection to the system board
Start with these and let see where it takes us
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
  1. Done
  2. BMC Fan 1 - 4800 (min failure threshold 750)
    BMC Fan 2 - 1500 (min failure threshold 675)
  3. All BMC/PROC temps are well below maximum in OMSA
  4. Connector seems fine, but will try it again tonight
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
Doesn't seem to be the connector. Any other ideas or information I can supply that might help?
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charlestasseCommented:
I think your looking at a system board and fan replacment
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
AND ... or OR? Vast difference in cost between the two...

Other than the noise is there a problem leaving it running that way?
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charlestasseCommented:
its not a problem running the way it is, too much airflow is not generally an issue
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
So I suppose only issues are noise and fan burning out a bit earlier in it's lifecycle?
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charlestasseCommented:
i would agree with that
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
Any idea if something like that is more likely to be the fan or SB?

If the SB, is it likely to be indicative of something else going wrong?

I just want to be sure of my risk if I do nothing :-)
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charlestasseCommented:
The Fan itself is dumb and will run at full speed without management by the Baseboard Management Controller. Which is what it appears to be doing.
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
Thanks for your help...
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PhaseFourCommented:
Hi - I have exactly the same problem with the same model server and it started around January 1st this year.  (I started to think it was a y2K10 bug).  Was your final solution to put up with the noise ?  Thanks
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
No, I haven't found a solution... odd that it happened at the same time (and I know of one other as well)

Also weird... it went normal for two days last week, then started going up and down... now back to up all the time.
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mmroziakCommented:
I would be interested to know what has happened to these 2 systems since February.  I have a similar problem.  The rear fan on a Poweredge 1800 started operating at high speed last week - it occasionally drops back to normal.  The system is still under support from Dell, but they have not been able to diagnose the problem using DEST reports.  I am planning on replacing the system in May and am reluctant to do much to the system until then, especially if the issue is benign.  Thanks.
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PhaseFourCommented:
My clients havent complained about their server in many months - but I am not sure if this is because they are used to the noise, or when it happens they dont report it to me.  I do know for sure that every time I have gone onsite to work on the server it hasnt been happening.   I shall find out for sure this week and post back.  
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Mike LazarusAct! Evangelist - CRM ConsultantAuthor Commented:
The one fan in mine is still running at full ... hasn't caused an issue other than the increased noise.
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