North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

RE: "They all suck!" Re: UPS failure modes (was: fire at NAC)

  • From: Temkin, David
  • Date: Thu May 29 19:51:49 2003

Liebert makes one, actually.   The model # escapes me, but we considered
using it for equipment that's single powered.  (We have uber power
redundancy..)

-----Original Message-----
From: E.B. Dreger [mailto:[email protected]] 
Sent: Thursday, May 29, 2003 7:38 PM
To: [email protected]
Subject: Re: "They all suck!" Re: UPS failure modes (was: fire at NAC)



SD> Date: Thu, 29 May 2003 16:53:43 -0400 (EDT)
SD> From: Sean Donelan


SD> Yep, tieing together "redundant" systems with parelleling gears 
SD> turns two independent systems into one "co-dependent" system.  In a 
SD> failure situation, you want to compartmentalize the failure.  
SD> Loosing half your systems may be better than loosing all your 
SD> systems.

Too bad a substantial amount of equipment doesn't allow for redundant
plugins.  The ability to plug { servers | routers | whatever } into two
totally separate power feeds is nice.

Anyone for building a rackmount transfer switch for two inputs? Assuming it
didn't fail (!) -- would the economies of scale work for or against it
compared to big transfer switches?  Between dealing with _much_ smaller
current levels and the opportunity for mass production, what are the chances
of something like this working?


Eddy
--
Brotsman & Dreger, Inc. - EverQuick Internet Division Bandwidth, consulting,
e-commerce, hosting, and network building
Phone: +1 (785) 865-5885 Lawrence and [inter]national
Phone: +1 (316) 794-8922 Wichita

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Mon, 21 May 2001 11:23:58 +0000 (GMT)
From: A Trap <[email protected]>
To: [email protected]
Subject: Please ignore this portion of my mail signature.

These last few lines are a trap for address-harvesting spambots. Do NOT send
mail to <[email protected]>, or you are likely to be blocked.


IMPORTANT:The information contained in this email and/or its attachments is
confidential. If you are not the intended recipient, please notify the
sender immediately by reply and immediately delete this message and all its
attachments.  Any review, use, reproduction, disclosure or dissemination of
this message or any attachment by an unintended recipient is strictly
prohibited.  Neither this message nor any attachment is intended as or
should be construed as an offer, solicitation or recommendation to buy or
sell any security or other financial instrument.  Neither the sender, his or
her employer nor any of their respective affiliates makes any warranties as
to the completeness or accuracy of any of the information contained herein
or that this message or any of its attachments is free of viruses.