From owner-freebsd-questions@FreeBSD.ORG Sun Oct 7 03:12:12 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 B9DF616A417 for ; Sun, 7 Oct 2007 03:12:12 +0000 (UTC) (envelope-from oceanare@pacific.net.sg) Received: from smtpgate1.pacific.net.sg (smtpgate1.pacific.net.sg [203.120.90.31]) by mx1.freebsd.org (Postfix) with SMTP id B13D913C480 for ; Sun, 7 Oct 2007 03:12:11 +0000 (UTC) (envelope-from oceanare@pacific.net.sg) Received: (qmail 8858 invoked from network); 7 Oct 2007 03:12:09 -0000 Received: from bb121-7-21-50.singnet.com.sg (HELO P2120.somewherefaraway.com) (oceanare@121.7.21.50) by smtpgate1.pacific.net.sg with ESMTPA; 7 Oct 2007 03:12:09 -0000 Message-ID: <47084E80.3010003@pacific.net.sg> Date: Sun, 07 Oct 2007 11:12:00 +0800 From: Erich Dollansky User-Agent: Thunderbird 2.0.0.6 (X11/20070826) MIME-Version: 1.0 To: Gary Kline References: <20071006231203.GA65801@thought.org> In-Reply-To: <20071006231203.GA65801@thought.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: 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 03:12:12 -0000 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. Erich