From owner-freebsd-stable@FreeBSD.ORG Wed Jun 4 11:06:14 2003 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 728FF37B401 for ; Wed, 4 Jun 2003 11:06:14 -0700 (PDT) Received: from gw.catspoiler.org (217-ip-163.nccn.net [209.79.217.163]) by mx1.FreeBSD.org (Postfix) with ESMTP id AC75543FAF for ; Wed, 4 Jun 2003 11:06:13 -0700 (PDT) (envelope-from truckman@FreeBSD.org) Received: from FreeBSD.org (mousie.catspoiler.org [192.168.101.2]) by gw.catspoiler.org (8.12.9/8.12.9) with ESMTP id h54I61M7013783; Wed, 4 Jun 2003 11:06:04 -0700 (PDT) (envelope-from truckman@FreeBSD.org) Message-Id: <200306041806.h54I61M7013783@gw.catspoiler.org> Date: Wed, 4 Jun 2003 11:06:01 -0700 (PDT) From: Don Lewis To: bmilekic@unixdaemons.com In-Reply-To: <20030604173247.GA77306@unixdaemons.com> MIME-Version: 1.0 Content-Type: TEXT/plain; charset=us-ascii cc: freebsd-stable@FreeBSD.org cc: noor@comrax.com Subject: Re: Sudden and unexplained reboots X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Jun 2003 18:06:14 -0000 On 4 Jun, Bosko Milekic wrote: > > On Wed, Jun 04, 2003 at 08:13:24PM +0200, Noor Dawod wrote: >> Hello, >> >> I'm having a problem in one of the FreeBSD boxes that I manage. All of a >> sudden, and for no particular reason, the machine just reboots abruptly. >> When it loads up again, I cannot see an indication that there's anything >> wrong in the configuration. >> >> By the way, the machine is running like this for few months, and no >> changes were made lately. Machine has 2GB RAM, RAID-5 disk array and a >> Xeon 933Mhz CPU. There's enough space on disk and more free RAM to drive >> 5 desktop computers. >> >> Anyone got an idea how to debug the problem? and better, how to resolve >> and fix it? >> >> Thanks in advance. >> >> /Noor > > Build a kernel with INVARIANTS and DDB options and see if you get > dumped to the console debugger following a trap or panic at some point. > > Also, obviously, make sure that you're not getting any power surges or > anything of the sort; basically anything hardware-related that could > possibly cause a reboot. If you're plugged into a series-connected > outlet, I would advise to try a different outlet. If you're plugged > into a UPS, make sure that the load on it is not too high. I'd also check to make sure that all the fans are operational and something isn't overheating.