From owner-freebsd-questions@FreeBSD.ORG Wed Aug 11 20:18:06 2010 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 4F3921065673 for ; Wed, 11 Aug 2010 20:18:06 +0000 (UTC) (envelope-from ryan.coleman@cwis.biz) Received: from qmta06.emeryville.ca.mail.comcast.net (qmta06.emeryville.ca.mail.comcast.net [76.96.30.56]) by mx1.freebsd.org (Postfix) with ESMTP id 350758FC1D for ; Wed, 11 Aug 2010 20:18:05 +0000 (UTC) Received: from omta07.emeryville.ca.mail.comcast.net ([76.96.30.59]) by qmta06.emeryville.ca.mail.comcast.net with comcast id t7su1e0031GXsucA68J4aa; Wed, 11 Aug 2010 20:18:04 +0000 Received: from [10.0.1.9] ([76.113.183.74]) by omta07.emeryville.ca.mail.comcast.net with comcast id t8J11e0071cjQTw8U8J2cX; Wed, 11 Aug 2010 20:18:04 +0000 Mime-Version: 1.0 (Apple Message framework v1081) Content-Type: text/plain; charset=us-ascii From: Ryan Coleman X-Priority: 3 (Normal) In-Reply-To: <43a2b1b16a03a5c58dfb7beaadd0c535.squirrel@www.gull.us> Date: Wed, 11 Aug 2010 15:18:01 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: <3AB9F23A-B56C-4176-83C9-F248161066B9@cwis.biz> References: <3135A83C-6FD9-4C3B-958F-11EE85221061@mac.com> <5304A319-0406-4510-B6B2-8FD609239FF9@cwis.biz> <43a2b1b16a03a5c58dfb7beaadd0c535.squirrel@www.gull.us> To: David Brodbeck X-Mailer: Apple Mail (2.1081) Cc: User Questions Subject: Re: UPS question 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: Wed, 11 Aug 2010 20:18:06 -0000 On Aug 11, 2010, at 3:06 PM, David Brodbeck wrote: > On Wed, August 11, 2010 12:25 pm, Ryan Coleman wrote: >> He thinks that at 500W needed it would give me about 12 minutes on a >> 1400VA. My consideration is, then, give the server 2 minutes on = battery. >> If full power has not been returned, shut down the server but leave = the >> modem (w/ wireless) and switch running with power for up to 6 hours. >=20 > A bit of advice: If this is an unattended system, give some thought to = how > you will boot the server back up if the outage is longer than two = minutes > but shorter than six hours. Most UPS installations have *some* kind = of > race condition issue if power comes back after the servers have begun = a > shutdown, but in your case it's an unusually long window. Meaning that my 2-minute window is unusually long? If the UPS can = support the system for 12 minutes, I say give it 20% of the life of the = support because our power outages here are usually spikes that kill my = current web server (but amazingly *not* my file server). In fact, one of = those power fluxes occurred last night. I love storms for the light = shows, but hate them for the toll they take on my servers. Additionally I spent $34 on a video card today that reduces my power = consumption by 150Watts, resulting in a $13 per month savings in my = powerbill - in MN we have a fixed-rate utility fee structure per season = (winter power costs less than summer, I believe, for whatever reason) = and a $10 mail-in rebate on the card means I will be turning a net = profit in 2 months! -- Ryan=