From owner-freebsd-questions@FreeBSD.ORG Thu Feb 16 15:28:23 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 5B59E16A422 for ; Thu, 16 Feb 2006 15:28:23 +0000 (GMT) (envelope-from hakmi@rogers.com) Received: from smtp107.rog.mail.re2.yahoo.com (smtp107.rog.mail.re2.yahoo.com [68.142.225.205]) by mx1.FreeBSD.org (Postfix) with SMTP id E343D43D46 for ; Thu, 16 Feb 2006 15:28:22 +0000 (GMT) (envelope-from hakmi@rogers.com) Received: (qmail 15667 invoked from network); 16 Feb 2006 15:28:22 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=rogers.com; h=Received:From:To:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Mailer:In-Reply-To:X-MimeOLE:Thread-Index; b=nlqnEkZWxgdw6fpM9pw1qdjCqwl8fUFi9YKIS4vbmMoPaZXghe5SuTCWOHXVOe5G/x8U073ckUwTLWWU9bpE185Nhr3f/7xnOrjLvW45iarwjMgUXSdF7xptDHx177ZwDLM/9BfHo9LgTuaoJKyh7mVWH4wjx2V0IW1SdOVp/Ic= ; Received: from unknown (HELO tamouh) (hakmi@rogers.com@70.27.160.99 with login) by smtp107.rog.mail.re2.yahoo.com with SMTP; 16 Feb 2006 15:28:22 -0000 From: "Tamouh H." To: Date: Thu, 16 Feb 2006 10:27:39 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook, Build 11.0.6353 In-Reply-To: <021b01c63309$ab353130$0401a8c0@Mike8500> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Thread-Index: AcYzB3eK1zvJPVaHSGO6Z/K5fLXAhwAAIg4AAAFVqiA= Message-Id: <20060216152822.E343D43D46@mx1.FreeBSD.org> Subject: RE: Mysterious reboot 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: Thu, 16 Feb 2006 15:28:23 -0000 >=20 > Alex de Kruijff wrote: > > On Thu, Feb 16, 2006 at 01:46:19AM -0600, Mike Loiterman wrote: > >> Afte being up for more than two months, I just noticed that my ver=20 > >> reliable and stable server mysteriously rebooted. I've > had the same > >> hardware and system setup for more than a year and haven't ever=20 > >> experienced anything like this before. I haven't added any new=20 > >> hardware in a very long time. I did upgrade mysql this > morning via > >> portupgrade, however. > >>=20 > >> The system appears to have crashed, as dmesg shows that > the various > >> filesystems weren't unmounted correctly upon reboot, but > aside from > >> that single error, nothing else points to what the problem was. > >>=20 > >> /var/log/messages just shows a user connectig via pop, and > then the > >> next line is the machine booting. > >>=20 > >> We are having a pretty good rainstorm, but nothing else > seems to have > >> lost power and I have several other machines in this space > that did > >> not go down (servers, TVs, XBOX, laptops, etc). > >>=20 > >> The machine seems to have gone down around 11:23 PM, so I checked=20 > >> /etc/cron to see if I had scheduled a job to be run at > that time, but > >> there are no jobs scheduled to be run on or near this time. > >>=20 > >> Where can I begin to look for more clues as to why this > machine seems > >> to have crashed? Where would a kernel core dump be or a > mysql core > >> dump? > >=20 > > You can look at /var/log/messages and find core files with 'find /=20 > > -name \*.core' > >=20 >=20 > The only real explanation was some sort of power fluctuation.=20 > I'll continue to monitor it carefully, but there doesn't seem to be=20 > anyway to definitivly identify the cause, but the machine crashing=20 > under load is looking less and less likely. >=20 > If there is a problem, I suspect it will show up again within the next = > week or so, otherwise I'll chalk it up to a random event in the=20 > unverse. I have had the exact issue with a dual xeon and FreeBSD 5.4 with 4GB = RAM. It was working perfectly fine and after a month or two all the = sudden the machine rebooted by itself. Well, I shouldn't say all the = sudden, one of the circuit breakers blow up taking the server down, but = since that time , the server would do sudden reboots. No errors, no dumps, no panics. Just a simple reboot. Then it started = becoming more often (it reboots every 15 days, then 10 days, then 5 = days). So I began to suspect it is a power issue. We use a remote reboot power switch, so I moved it to another socket, = and so far 20 days, no reboots. Not sure if it will go crazy again, but = I hope it doesn't. The power supply is 500W so should be more than sufficient for 4 SCSI = drives and dual xeons.