Originally Posted by the_beast
Not missing the point - you wanted to quieten a 1U server. The easiest way to do that is move the stuff to a bigger case. It is also probably the cheapest way.
If you leave the current fans in the case, the cooling will be fine, providing you don't impact too much on the air path outside of the case. But it will NEVER be quiet. Quieter, maybe. But it will always give you a headache unless you make a seriously HUGE case with many layers to put it in.
Similarly the HDDs - unless you make a massive case, they will remain audible.
To be honest, any kind of baffling will work. You mainly need to get a lot of layers of decoupled mass between you & the noise source. The denser the better - it is decoupled mass that absorbs sound. You will need multiple layers, each isolated from each other, and probably intake fans as well as exhaust fans as the current ones are only designed to push air through the case itself - not pull it through multiple baffles on the intake & exhaust. The case NEEDS huge airflow as the heatsinks are, by necessity, very small inside a 1U case.
You will be fighting an uphill battle if you try and stick with the current enclosure.
heheh, uphill battle = what I was aiming for.
I was thinking of doing the layered approach like you said, what materials would be the best for this layerd job? I know those build at home soundbooths aren't sound proof, but they work very well, and the walls are not too think that it's impossible to build one yourself.
As for the size of the case, I was thinking it would have a dedicated space for the server, and then either on top or below that, the channeling and baffling for the intake and exhaust. Basically two equally sized sections, 1 for the server mounting, and the 2nd for the air flow and dampening. The dampening/proofing material would be layed all throughout the server mounting location and the channeling/baffling. As for fans mounted on this enclousure, I was thinking it would only need exhaust fans to help move that hot air away from the server. I had a dryer vent duct taped to the front of the server and ran it to another room, and it didn't effect the cooling all too much. I'm afraid though, that once the air is through the server, it has no where to go, and I will need something pulling the air out of the back of the case.
Also, since there are clearly marked intake and exhaust vents on the server, I would thermally isolate the front and back of the server with some simple foam inserts, so the hot air coming out the back would not be recirculated.