From owner-freebsd-questions@FreeBSD.ORG Sun Feb 6 03:46:05 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 78EF116A4CE for ; Sun, 6 Feb 2005 03:46:05 +0000 (GMT) Received: from imf18aec.mail.bellsouth.net (imf18aec.mail.bellsouth.net [205.152.59.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id BF4A943D39 for ; Sun, 6 Feb 2005 03:46:04 +0000 (GMT) (envelope-from ken_jennings@bellsouth.net) Received: from wolverine.481sumter.33325.net ([65.3.196.127]) by imf18aec.mail.bellsouth.netESMTP <20050206034604.FDQN2060.imf18aec.mail.bellsouth.net@wolverine.481sumter.33325.net> for ; Sat, 5 Feb 2005 22:46:04 -0500 From: Kenneth Jennings To: freebsd-questions@freebsd.org Date: Sat, 5 Feb 2005 22:46:56 -0500 User-Agent: KMail/1.6.2 References: <200502051745.25937.hindrich@worldchat.com> <15210109162.20050206001338@wanadoo.fr> In-Reply-To: <15210109162.20050206001338@wanadoo.fr> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200502052246.57343.ken_jennings@bellsouth.net> Subject: Re: Leaving a Computer Running ? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Feb 2005 03:46:05 -0000 On Saturday 05 February 2005 18:13, Anthony Atkielski wrote: > Peterhin writes: [snip] > - Moving parts are not subjected to thermal and mechanical stresses of > starting and stopping. For example, disk drives and fans are under less > stress during continuous running than they are at the moment when they > start and stop. Failures are more likely to occur when a mechanical > part is started up than during continuous operation. Ah. I bet there are more than a few people here who can repeat a horror story about what happened when a long running server was shut down. I remember several years ago we had a HP server at work that had been running nonstop for about three years. One day, due to a major electrical upgrade in the computer room, the sysadmin had to cold start it. Three hard drives would not come back up. Everyone except the sysadmins had a four-day weekend. Since then they've switched to using multiple, redundant hot-swappable hardware. I have a file server in the house that runs continuously. It sits on an UPS. Everything else is shut down at night.