From owner-freebsd-hackers@FreeBSD.ORG Fri Apr 14 01:09:42 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E3F3E16A401 for ; Fri, 14 Apr 2006 01:09:41 +0000 (UTC) (envelope-from andymac@bullseye.apana.org.au) Received: from mail.acis.com.au (atlantis.acis.com.au [203.14.230.6]) by mx1.FreeBSD.org (Postfix) with SMTP id 11BCA43D45 for ; Fri, 14 Apr 2006 01:09:40 +0000 (GMT) (envelope-from andymac@bullseye.apana.org.au) Received: (qmail 37233 invoked from network); 14 Apr 2006 01:09:37 -0000 Received: from unknown (HELO bullseye.apana.org.au) (202.6.34.1) by atlantis.acis.com.au with SMTP; 14 Apr 2006 01:09:37 -0000 Received: from [203.9.107.238] (tenring.andymac.org [203.9.107.238]) by bullseye.apana.org.au (8.12.8p1/8.12.8) with ESMTP id k3E0vLPM025276 for ; Fri, 14 Apr 2006 10:57:21 +1000 (EST) (envelope-from andymac@bullseye.apana.org.au) Message-ID: <443EE34A.2050906@bullseye.apana.org.au> Date: Fri, 14 Apr 2006 10:48:26 +1100 From: Andrew MacIntyre User-Agent: Thunderbird 1.5 (OS/2/20060113) MIME-Version: 1.0 To: freebsd-hackers@freebsd.org References: <443E95C1.4030404@digitalstratum.com> <443E9C38.709@dial.pipex.com> In-Reply-To: <443E9C38.709@dial.pipex.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: FreeBSD Crash without Errors, Warnings, or Panics X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Apr 2006 01:09:42 -0000 Alex Zbyslaw wrote: {...} > Several times now I have had Linux servers (and production quality ones, > not built by me ones :-)) die in a somewhat similar fashion. In every > case the cause has been either a flaky disk or a flaky disk controller, > or some combination. I've seen an instance of somewhat similar symptoms where a power supply was sagging out of spec on one supply rail some time after startup. When some disk activity happened, the extra power consumption caused the voltage to sag further triggering the disk going AWOL. At the time this started to happen, the power supply was more than 12 months old. ------------------------------------------------------------------------- Andrew I MacIntyre "These thoughts are mine alone..." E-mail: andymac@bullseye.apana.org.au (pref) | Snail: PO Box 370 andymac@pcug.org.au (alt) | Belconnen ACT 2616 Web: http://www.andymac.org/ | Australia