Re: Routers in Data Centers

[Seth Mattinen <sethm () rollernet us>]

On 9/26/10 11:09 AM, Joel Jaeggli wrote:
> Joel's widget number 2
>
> On Sep 26, 2010, at 10:47, Chris Adams <cmadams () hiwaay net> wrote:
>
> > Once upon a time, Joel Jaeggli <joelja () bogus com> said:
> > > On Sep 26, 2010, at 8:26, Chris Adams <cmadams () hiwaay net> wrote:
> > > > There are servers and storage arrays that have a front that is nothing
> > > > but hot-swap hard drive bays (plugged into backplanes), and they've been
> > > > doing front-to-back cooling since day one.  Maybe the router vendors
> > > > need to buy a Dell, open the case, and take a look.
> > >
> > > The backplane for a sata disk array is 8 wires per drive plus a common power bus.
> >
> > Server vendors managed cooling just fine for years with 80 pin SCA
> > connectors.  Hard drives are also harder to cool, as they are a solid
> > block, filling the space, unlike a card of chips.
>
> It's the same 80 wires on every single drive in the string.
>
> There are fewer conductors embedded in 12 drive sca backplane as there are in a 12 drive sata backplane, in both 
> cases they are generally two layer pcbs. Compared to what 10+ layer pcbs that are a approaching 1/4" thick on the 
> router. 

Aw come on, that's no reason you can't just drill it full of holes. I
mean, it is 2010. It should be wireless by now.

~Seth