[H-GEN] 'refridgerated' server rack

[QuarkAV.com - Hilton Travis]

On 9/12/2010 3:11 PM, Mick wrote:
> [ Humbug *General* list - semi-serious discussions about Humbug and     ]
> [ Unix-related topics. Posts from non-subscribed addresses will vanish. ]
>
> On Thu, 9 Dec 2010 13:02:31 +1000
> Nick Kwiatkowski<nickolas at au1.ibm.com>  wrote:
>
>> Mick wrote on 09/12/2010 11:12:48 AM:
>>
>>> The thought crossed my mind that I might be able to develop and
>>> simple unit that could chill the cabinet less expensively.
>>>
>>> Any thoughts?
>>>
>> I had a similar issue with the external unit for our A/C for our
>> home. Ended up with a sound barrier around the unit that did make a
>> difference. My comment on that was there are different types of sound
>> materials and if not install correctly - the material will just
>> capture and transfer the noise to something else to reasonate.
>>
>> If you are ok with the cooling itself - ignoring the noise. You could
>> consider sound cancellation. Since you are in a contained area it is
>> likely to be effective. Basic principle is phase reversal -- termed
>> as active noise control -->
>> http://en.wikipedia.org/wiki/Active_noise_control
>>
>> My thinking was along the lines of pulling apart a noise cancelling
>> headset and amplifying the speaker output.
>>
>>
> The noise is a by product of the cooling problem and the x345 being a
> 2U rack mount box, everything is packed in tight and there is only room
> for very small fans that have to run hard to push the air through.
Our HP DL380 G6 with 24GB RAM, 4 * 146 GB 10K SAS, 4 * 300GB 10K SATA 
and a single E5530 CPU is about as close to silent as I've ever heard a 
serious server.  It, too, is a 2RU server.  Including the fan in each of 
the redundant PSUs, there's currently 6 active fans in this server.  We 
have a similar server in a client site, however with 2 * E5530 CPUs and 
8 * fans and it is equally silent - if you're not logged into it and are 
standing in the server room, the only way you'd know it was powered up 
is to look at the lights on the front of it!  :)

Hilton Travis