Date: Tue, 01 Oct 2013 01:07:31 +0000 From: Chloe Lee <ethan.freeservices@gmail.com> To: freebsd-questions@FreeBSD.org, freebsd-doc@FreeBSD.org Subject: Freebsd.org - Integrated marketing help Message-ID: <047d7b3a8a5ac5019c04e7a39374@google.com>
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Tue, 1 Oct 2013 02:16:46 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mx02.qsc.de (mx02.qsc.de [213.148.130.14]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 0EE422430 for <freebsd-questions@freebsd.org>; Tue, 1 Oct 2013 02:16:45 +0000 (UTC) Received: from r56.edvax.de (port-92-195-74-65.dynamic.qsc.de [92.195.74.65]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx02.qsc.de (Postfix) with ESMTPS id AFA11277AE for <freebsd-questions@freebsd.org>; Tue, 1 Oct 2013 04:16:37 +0200 (CEST) Received: from r56.edvax.de (localhost [127.0.0.1]) by r56.edvax.de (8.14.5/8.14.5) with SMTP id r912GVel002095 for <freebsd-questions@freebsd.org>; Tue, 1 Oct 2013 04:16:31 +0200 (CEST) (envelope-from freebsd@edvax.de) Date: Tue, 1 Oct 2013 04:16:31 +0200 From: Polytropon <freebsd@edvax.de> To: freebsd-questions@freebsd.org Subject: Re: cause of reboot Message-Id: <20131001041631.4c018102.freebsd@edvax.de> In-Reply-To: <l2d56v$svs$1@ger.gmane.org> References: <519911380551058@web20j.yandex.ru> <20130930190944.281aa46d@davenulle.org> <l2cg1g$oqj$1@ger.gmane.org> <20131001000739.GC68360@neutralgood.org> <l2d56v$svs$1@ger.gmane.org> Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: Polytropon <freebsd@edvax.de> List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Tue, 01 Oct 2013 02:16:46 -0000 On Mon, 30 Sep 2013 20:32:39 -0400, Michael Powell wrote: > kpneal@pobox.com wrote: > [snip] > > While we're throwing ideas onto the table let me mention power supplies. > > Power supplies and hard drives are in a race to see which one will fail > > first. It may be that the power supply is marginal and added load from > > the drives being hit hard may send it over the edge. How heavily loaded > > is the machine in question? > > Absolute and total agreement with this. The idea of a hardware problem looks more and more obvious here. A software configuration problem could be located by diff'ing the currently used files against "stock files", or by checking the logs of a versioning system (if you use one to track your local configuration file changes, for example in a CVS reposi- tory). It could be a matter of power (by "more than usual" drain when the machine is heavily loaded), but also a file system inconsis- tency is possible. In case the machine is using a background fsck that silently fails to deal with a specific damage, using background_fsck="NO" in /etc/rc.conf to _definitely_ bring the file systems up _clean_ prior to multi-user mode booting would probably be a good idea. Using "smartctl" to check the hard disks SMART data would make sure the disk is not dying (and the reboot is an effect of that). Monitoring the server when (or while) it reboots would surely be interesting. Maybe open some sessions to have a close look at programs like "top", "systat -v" and "mbmon" (to check for temperatures and voltages) - and when run at 1 second intervals, it should be possible to obtain a good system status diagram of the "last state" before reboot, when the connection drops. > I once had a box where the RAM chips > would "sing" with a high-pitched whistle only during the 0300 periodic run. > It sounded just like the horizontal output on a television right before > destruction. :-) I have heared something comparable from a graphics card when developing some OpenGL demo stuff. :-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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