From owner-freebsd-hackers@FreeBSD.ORG Fri Apr 14 03:13:58 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 2460716A403 for ; Fri, 14 Apr 2006 03:13:58 +0000 (UTC) (envelope-from matthew@mundomateo.com) Received: from mail.mundomateo.com (static-24-56-193-117.chrlmi.cablespeed.com [24.56.193.117]) by mx1.FreeBSD.org (Postfix) with ESMTP id BA9B543D49 for ; Fri, 14 Apr 2006 03:13:57 +0000 (GMT) (envelope-from matthew@mundomateo.com) Received: from [10.0.81.12] (unknown [10.0.81.1]) by mail.mundomateo.com (Postfix) with ESMTP id EDD542844E; Thu, 13 Apr 2006 23:13:56 -0400 (EDT) Message-ID: <443F1371.9080905@mundomateo.com> Date: Thu, 13 Apr 2006 23:13:53 -0400 From: Matthew Hagerty User-Agent: Thunderbird 1.5 (Windows/20051201) MIME-Version: 1.0 To: Andrew MacIntyre References: <443E95C1.4030404@digitalstratum.com> <443E9C38.709@dial.pipex.com> <443EE34A.2050906@bullseye.apana.org.au> In-Reply-To: <443EE34A.2050906@bullseye.apana.org.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Fri, 14 Apr 2006 03:21:17 +0000 Cc: freebsd-hackers@freebsd.org Subject: Re: FreeBSD Crash without Errors, Warnings, or Panics X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: matthew@mundomateo.com 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 03:13:58 -0000 Andrew MacIntyre wrote: > 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 > _______________________________________________ I considered power problems, however the server has dual redundant 400 Watt power supplies, and is in a server room and none of the other machines in there are having problems like this one. I suppose it is possible that both supplies are failing, but that seems highly unlikely? Matthew