[115623] in North American Network Operators' Group
Re: Fire, Power loss at Fisher Plaza in Seattle
daemon@ATHENA.MIT.EDU (William Herrin)
Fri Jul 3 14:50:49 2009
In-Reply-To: <70D072392E56884193E3D2DE09C097A91F4234@pascal.zaphodb.org>
Date: Fri, 3 Jul 2009 14:49:57 -0400
From: William Herrin <herrin-nanog@dirtside.com>
To: "Tomas L. Byrnes" <tomb@byrneit.net>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Jul 3, 2009 at 1:20 PM, Tomas L. Byrnes<tomb@byrneit.net> wrote:
> This begs the question of what basic parameters should be for a
> "carrier hotel" or co-lo. [...] The old NEBS standards were too much
> of a straightjacket.
Tomas,
There is a useful standard: ANSI/TIA-942. It offers specifications for
four tiers of data centers ranging from tier 1 (a basic data center
with no redundancy) to tier 4 (fully fault tolerant).
http://www.tiaonline.org/standards/catalog/search.cfm?standards_criteria=TIA-942
(the 2005 one)
Judging from http://www.techlinks.net/community/articles/article/1-article-submission-forms/14833-a-quick-primer-on-data-center-tier-classifications
there's even research that projects what sort of annual downtime you
can expect for each of the tiers described by the standard.
When I walk into a data center, I make a habit of asking which tier
they achieve, at least for the HVAC and electrical systems. And then I
ask to see the components which the tier claim says they should have.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
