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Re: Proliant ML370G1 fan noise

 
Giuliano_8
Advisor

Re: Proliant ML370G1 fan noise

JP, ik did succeed in soldering the jellow signal wire from 2 fans the a another fan so 2 fans are now disabled, i'm running 1 fan now but it;s still bit to loud... i will keep you informed
JP Steeghs
Occasional Advisor

Re: Proliant ML370G1 fan noise

Hi Giuliano,
Here's the location of ML370 G2 general overview page:
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=15351&prodSeriesId=316593
and here's the location of the overview page of all ML370 G2 manuals:
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManualтМй=en&cc=us&docIndexId=179911&taskId=101&prodTypeId=15351&prodSeriesId=316593
The 'Server setup & installation guide' is located at:
http://h20000.www2.hp.com/bc/docs/support/UCR/SupportManual/TPM_203510-001/TPM_203510-001.pdf
Chapter of this manual contains a picture of the connection of the bundled wires of the three hot-plug fans to the mainboard. Check out how many wires (and wich colours) come out of this mainboardconnector and how the wires are distributed to the 'plugs' to which the 3 fans are connected. It is very likely that there's 12 to 15 wires, neatly distributed in 4-5 wires to each 'plug', or maybe the two processor-fan 'plugs' have a joint power supply, in that case there's probably 8-10 wires distributed two ways to the 'plugs'. My guess is that it works the same way as with the G1, only now with a somewhat more sofisticated design.
Also check on _how_ these wires are connected to the 'plugs': are they soldered, or do they have connectors?
Because of the design it is a little harder to experiment with the wiring.
If the 'plugs' have connectors, it's more easy, you can then extend the connector by new wires and connectors.
If the wires are soldered to the 'plugs', it's a little bit tricky, you have to be very, very cautious with cutting wires ... :)
Bye & take care, JP
JP Steeghs
Occasional Advisor

Re: Proliant ML370G1 fan noise

Hi G.,
The second link doesn't seem to work, but you can get there through the first one ...
Bye, JP
Jon Ward
Trusted Contributor

Re: Proliant ML370G1 fan noise


Note that tampering with the fans from the manufacturer specification may increase the chances of abnormal shutdowns due to thermal failures. There is a reason why the fans are there.

That being said, there might be a way of indirectly reducing fan speeds by reducing the load of the server. For instance, if you have two processors, you can reduce the server's overall temperature by reducing it to one. The same applies to hard drives, memory, expansion boards, etc. The cover should be seated at any time, as it interfers with the air flow. Empty hard drive slots should be covered. And if mounted in a rack, there should be mesh doors (holes allowing air to be suctioned in).

It is possible for fans to be unnormally loud if there is a ball baring problem with one of the fans. However, it would be much louder than that of any other server product, not just incrementally.