[Beowulf] Re: Rear-door heat exchangers and condensation

Greg Lindahl lindahl at pbm.com
Thu Dec 11 18:14:52 EST 2008


On Thu, Dec 11, 2008 at 05:57:30PM -0500, Mark Hahn wrote:

> why do you have doors on your rack?  normally, a rack is filled with
> servers with fans that generate the standard front-to-back airflow.
> that means that you want no doors, or at least only high-perf mesh ones.

Sometimes a server which is off is too hot to turn on, thanks to its
neighbors. One way to solve that is to have fans in the rack back
door. But these days it's hard to get enough airflow unless the entire
door is perforated, which makes fans in the door useless.

-- greg


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