[dc-ops] Low-End Switches with Dual Power

Scott Berkman scott at sberkman.net
Wed Sep 7 23:09:52 EDT 2011

We've actually seen these 1U ATS's fail in their moment of need too.

Of course that can happen anywhere.  I personally had gear in a facility run
by a major Tier1 carrier that lost power when a large ATS got physically
stuck in-between contacts while failing back to the primary power source.
Of course the unit showed that it had transferred properly, so problem was
not obvious.


-----Original Message-----
From: Matt Addison [mailto:matt.addison at lists.evilgeni.us] 
Sent: Wednesday, September 07, 2011 8:12 PM
To: Scott Berkman
Cc: DC-OPS Mailing Lists
Subject: Re: [dc-ops] Low-End Switches with Dual Power

On Wed, Sep 7, 2011 at 19:51, Scott Berkman <scott at sberkman.net> wrote:
> Does anyone have a good recommendation for a 1U (or similar) managed
> with dual power inputs, preferably A/C?
> We have a lot of data center customers that have dual power on all their
> servers but their switches are single feed, creating a single point of
> failure.  These are customers that manage their own equipment and don't
> to spend for the level of equipment like Cisco 4000 or 6000 that have
> redundant PSU's.

We usually recommend a rack mount ATS, although it only protects
against a failure on the provider side, and not a failure of the PSU
in their equipment.

Anything which switches in under a cycle (16ms) shouldn't be an issue
for most modern power supplies.


More information about the dc-ops mailing list