[130040] in North American Network Operators' Group
Re: Routers in Data Centers
daemon@ATHENA.MIT.EDU (Seth Mattinen)
Sun Sep 26 15:17:36 2010
Date: Sun, 26 Sep 2010 12:17:14 -0700
From: Seth Mattinen <sethm@rollernet.us>
To: nanog@nanog.org
In-Reply-To: <D73A7AAD-3234-404C-A00A-0A11833FB39D@bogus.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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
