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Dell PowerEdge 1800 BMC Fan 1 running at full speed

Posted on 2010-01-10
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Last Modified: 2013-11-10
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
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Question by:Mike Lazarus
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16 Comments
 
LVL 14

Accepted Solution

by:
charlestasse earned 2000 total points
ID: 26278976
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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LVL 30

Author Comment

by:Mike Lazarus
ID: 26279063
  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
0
 
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Author Comment

by:Mike Lazarus
ID: 26303362
Doesn't seem to be the connector. Any other ideas or information I can supply that might help?
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LVL 14

Expert Comment

by:charlestasse
ID: 26305103
I think your looking at a system board and fan replacment
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LVL 30

Author Comment

by:Mike Lazarus
ID: 26305255
AND ... or OR? Vast difference in cost between the two...

Other than the noise is there a problem leaving it running that way?
0
 
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Expert Comment

by:charlestasse
ID: 26305718
its not a problem running the way it is, too much airflow is not generally an issue
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LVL 30

Author Comment

by:Mike Lazarus
ID: 26306068
So I suppose only issues are noise and fan burning out a bit earlier in it's lifecycle?
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LVL 14

Expert Comment

by:charlestasse
ID: 26306249
i would agree with that
0
 
LVL 30

Author Comment

by:Mike Lazarus
ID: 26306316
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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LVL 14

Assisted Solution

by:charlestasse
charlestasse earned 2000 total points
ID: 26307217
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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LVL 30

Author Closing Comment

by:Mike Lazarus
ID: 31675247
Thanks for your help...
0
 

Expert Comment

by:PhaseFour
ID: 26519783
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
0
 
LVL 30

Author Comment

by:Mike Lazarus
ID: 26527674
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.
0
 

Expert Comment

by:mmroziak
ID: 33967756
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.
0
 

Expert Comment

by:PhaseFour
ID: 33970291
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.  
0
 
LVL 30

Author Comment

by:Mike Lazarus
ID: 33970401
The one fan in mine is still running at full ... hasn't caused an issue other than the increased noise.
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