From owner-freebsd-questions@FreeBSD.ORG Thu Dec 17 21:55:01 2009 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 27ACF1065679 for ; Thu, 17 Dec 2009 21:55:01 +0000 (UTC) (envelope-from norgaard@locolomo.org) Received: from mail.locolomo.org (97.pool85-48-194.static.orange.es [85.48.194.97]) by mx1.freebsd.org (Postfix) with ESMTP id CE6388FC19 for ; Thu, 17 Dec 2009 21:55:00 +0000 (UTC) Received: from beta.1-16-172-dyn.locolomo.org (beta.1-16-172-dyn.locolomo.org [172.16.1.127]) by mail.locolomo.org (Postfix) with ESMTPSA id BA7511C1A67; Thu, 17 Dec 2009 22:54:59 +0100 (CET) Message-ID: <4B2AA8B3.5080000@locolomo.org> Date: Thu, 17 Dec 2009 22:54:59 +0100 From: Erik Norgaard User-Agent: Thunderbird 2.0.0.23 (Macintosh/20090812) MIME-Version: 1.0 To: Chuck Swiger References: <4B2AA1F4.5020206@locolomo.org> <69AC657B-A0A7-41CA-92F6-989FEFEB776E@mac.com> In-Reply-To: <69AC657B-A0A7-41CA-92F6-989FEFEB776E@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Cc: questions@freebsd.org Subject: Re: System crashes under heavy disk i/o 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, 17 Dec 2009 21:55:01 -0000 Chuck Swiger wrote: > Hi-- > > On Dec 17, 2009, at 1:26 PM, Erik Norgaard wrote: >> FreeBSD 8.0-RELEASE-p1 #0: Fri Dec 11 11:53:19 CET 2009 >> norgaard@localhost:/usr/local/obj/usr/local/src/sys/GENERIC >> Timecounter "i8254" frequency 1193182 Hz quality 0 >> CPU: VIA Nehemiah (800.04-MHz 686-class CPU) >> Origin = "CentaurHauls" Id = 0x69a Stepping = 10 >> real memory = 268435456 (256 MB) >> avail memory = 231383040 (220 MB) >> atapci0: >> ad6: 476940MB at ata3-master SATA150 >> >> In normal operation I have no problem, but when performing intensive read or write for a prolonged time the system crashes. This happens also even if the partition is read-only. The crash occurs both with single large files (1GB) as well as many small files (10kb-10MB). > > That's probably a sign of either thermal problems from inadequate cooling, or possibly PSU not giving stable voltage rails and sagging a bit too low; also, at least the older VIA C3 EPIA hardware had somewhat flaky PATA interfaces; if I tried to use both PATA channels I'd see lockups, unless I turned everything down to UDMA-33 speeds. I doubt it's the cooling, processor is currently at 48C with passive cooling. But it could be PSU, I got the system for low power fanless silent operation, but after having disk crashes with laptop disks under heavy i/o, I got a server disk to sustain the continuous use. I'll try to slow it down and see if it helps, thanks for the advice. Erik -- Erik Nørgaard Ph: +34.666334818/+34.915211157 http://www.locolomo.org