From owner-freebsd-questions@FreeBSD.ORG Sun Oct 7 19:44:46 2007 Return-Path: Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B887016A421 for ; Sun, 7 Oct 2007 19:44:46 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (dsl231-043-140.sea1.dsl.speakeasy.net [216.231.43.140]) by mx1.freebsd.org (Postfix) with ESMTP id 304D013C46E for ; Sun, 7 Oct 2007 19:44:46 +0000 (UTC) (envelope-from kline@tao.thought.org) Received: from tao.thought.org (localhost [127.0.0.1]) by tao.thought.org (8.13.8/8.13.1) with ESMTP id l97JiltO074699; Sun, 7 Oct 2007 12:44:47 -0700 (PDT) (envelope-from kline@tao.thought.org) Received: (from kline@localhost) by tao.thought.org (8.13.8/8.13.1/Submit) id l97Jikp1074698; Sun, 7 Oct 2007 12:44:46 -0700 (PDT) (envelope-from kline) Date: Sun, 7 Oct 2007 12:44:46 -0700 From: Gary Kline To: Erich Dollansky Message-ID: <20071007194446.GA69551@thought.org> References: <20071006231203.GA65801@thought.org> <47084E80.3010003@pacific.net.sg> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47084E80.3010003@pacific.net.sg> User-Agent: Mutt/1.4.2.2i X-Organization: Thought Unlimited. Public service Unix since 1986. X-Of_Interest: With 21 of service to the Unix community. Cc: Gary Kline , FreeBSD Mailing List Subject: Re: what kind of UPS will work best? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Oct 2007 19:44:46 -0000 On Sun, Oct 07, 2007 at 11:12:00AM +0800, Erich Dollansky wrote: > Hi, > > there are basically two types of UPS' around: online and stand-by or fly-by. > > The online version is much more expensive but also much better in > critical conditions. > > Gary Kline wrote: > > Hi Folks, > > > > Recently, a storm happened and the power surge blew me > > off-line. Time to get serious about buying a UPS that will > > handle my four main servers for at-most, a 10-second power > > You have the choice between four individual boxes or one big box. > > Cases like this let the online version shine. Stand-by versions fail > pretty often especially if you have a neighbour around running big > engines powered directly from the power lines. > > Even big air-cons can cause the problems. > > > Linux} computer? Is there a UPS that is designed for heavy use > > and a very short (5- to 10-second) uptime? I'll need one that can > > I do not think that it is a good advice to go for 10 second uptime. Take > a rating fitting your machines (400W power rating for the machine, 600VA > for the UPS) with at least 10 minutes uptime. > > APC supplies you with both types of UPS. > > All APC I have seen failing were of the fly-by type, all other were the > online version. I think, it will be the same for any other brand. > > But do not drop dead when you see the price difference. This will be > money well spend. > First, thank to both you and Bart for your cmments. You were *right* about the price. Can I assume that a ballpark would be 400W for each server? (My wife is right: I've got to cut back to three computers:-) I've found one APC 2200VA with a 17minute uptime. 3 times 400W, yes? The first thing is to be sure of getting large enough UPS to bridge the few-seconds power outtages or fraction/section surges. So I need help there. Another question or two can wait. thanks for any further clues! gary > Erich -- Gary Kline kline@thought.org www.thought.org Public Service Unix http://jottings.thought.org http://transfinite.thought.org