Case fan on Dell PowerEdge 600SC spinning too fast.

I came into the office the other day and the case fan on my PowerEdge server was spinning like hell.  The room temperature was the same as always and everything else seemed kosher.  I don't have anyway to check the temperature of the CPU from the BIOS, but I suspect that it is fine.  I've opened the side of the case to allow for more airflow, but the fan still spins like hell.  I wouldn't bother with it, but it is so loud its a nuisance.  Any ideas?
Mach70803Asked:
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eccs19Commented:
It may not be that it's spinning fast, it could just be that the bearings are going on the fan, so it just makes noise that it wasn't before, therefore giving the illusion it's spinning fast.  I would just replace it, as it sounds like it's on it's way out anyways.
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battlepigeonsCommented:
Eccs probably right.  How old is the server and where do you live?  My folks live near the ocean and those bearing go bad after a few years.  They get louder and louder as they begin to fail and then they start bogging down as the bearings bind.  It sounds like it spins up and then spins back down...but it is certainly louder than before.  That is when it gets dangerous.  But for now its just annoying.  Replace the fan/power unit with one that is advertised as a quiet fan/PU.

Do not open up the case compared to leaving it open, the case is there (although some boards/case setups are better than others) to allow flow OVER high heat items.  If you open up the side, the fans suck from the path of least resistance.......i.e. the big open hole that is now the side of the case, and not from the front of the case, over the MB, and out the back.  

If you want to get fancy (not sure if you want to tamper), try a higher output fan, or put in additional fans to increase the flow OVER your MB.

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NickGT20Commented:
Your case fan is failing. Replace the fan
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PromethylCommented:
Allright, let's see here... Make sure another fan isn't stopped. If one of the other fans stop, the others will speed up to compensate. Second, find out the temperature triggers. In the BIOS it will tell you the current and trigger temperatures. These will let you know if the fan should be at highest speed.

Usually the fans won't go into "panic" mode unless it thinks the machine may overheat. It's a very good idea to clean your fan blades now (while the machine is off) check all sensors, fan power cables, etc.

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Pauli150Commented:
Are the fans temperature controlled?

Because if they are not it doesn't matter. Even the temperature controlled ones don't really make 'huge' differences. Check the fans to see if they are hitting a small wire or something, and if so, turn off the computer and gently bend the wire out of hte way.

Or you could get a can of compresed air and blow out the fans, paying special attention to near the bearings becaue a little bit of crud in there can make quite a bit of noise.
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PromethylCommented:
With the P/E 2600 series they are, and since the SC600 is in the same line ("servers"), It is my understanding the fans are temperature controlled.
 
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Pauli150Commented:
Even with temperature controlling it doesn't increase humoungously. I ahve some temperature controlled fans and it will increase anywhere from 0-1000 RPM depending on the temperatures, that wouldnt' cause a massive increase in noise.
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PromethylCommented:
The Dell PE 2600 I had sounded like a jet taking off, I heard it even in a noisy server room. I guess loud is relative?
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Pauli150Commented:
Lol yeah. Some guys I know have vantec tornadoes in their computers and they can't notice it :-D
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