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:eddy+public+spam@noc.everquick.net] Sent: Thursday, May 29, 2003 7:38 PM To: nanog@merit.edu 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 <blacklist@brics.com> To: blacklist@brics.com 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 <blacklist@brics.com>, 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.