nanog mailing list archives
Re: HE.net, Fremont-2 outage?
From: "Michael K. Smith" <mksmith () adhost com>
Date: Wed, 04 Nov 2009 11:21:37 -0700
On 11/4/09 11:44 AM, "Alex Rubenstein" <alex () corp nac net> wrote:
Regardless of generator sizing issues or disparities, if the ATS fails, then no amount of grid or generator power will keep the cabinets juiced up.That is patently false.
At it's root it's true - if an ATS fails the power between the source and destination will be interrupted.
Assume N+1 UPS, with each UPS module having its own ATS fed from a utility and emergency bus. Then you can even individually maintain each UPS module and ATS. Bonus and score. And if it's a really good place, you have two of the above (2(n+1)) and each of your power cords goes to one each.
Which doesn't address the failure of one piece of equipment. Of course, if you're dual chorded from your server through fully redundant switch gear to multiple, diverse vaults then a single ATS failure shouldn't affect you. Regards, Mike
Current thread:
- Re: HE.net, Fremont-2 outage?, (continued)
- Re: HE.net, Fremont-2 outage? Stef Walter (Nov 03)
- Re: HE.net, Fremont-2 outage? Joe Greco (Nov 03)
- Re: HE.net, Fremont-2 outage? Tico (Nov 03)
- Re: HE.net, Fremont-2 outage? Majdi S. Abbas (Nov 03)
- Re: HE.net, Fremont-2 outage? Scott Howard (Nov 03)
- Re: HE.net, Fremont-2 outage? Joe Greco (Nov 03)
- Re: HE.net, Fremont-2 outage? David B. Peterson (Nov 03)
- Re: HE.net, Fremont-2 outage? Joe Greco (Nov 04)
- Re: HE.net, Fremont-2 outage? dan syn (Nov 04)
- RE: HE.net, Fremont-2 outage? Alex Rubenstein (Nov 04)
- Re: HE.net, Fremont-2 outage? Michael K. Smith (Nov 04)
- Re: HE.net, Fremont-2 outage? nevin (Nov 04)
- Re: HE.net, Fremont-2 outage? nevin (Nov 04)
- Re: HE.net, Fremont-2 outage? Stef Walter (Nov 04)
- Re: HE.net, Fremont-2 outage? Scott Howard (Nov 04)