From owner-freebsd-questions@FreeBSD.ORG Thu Dec 17 21:26:14 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 91C5A106566C for ; Thu, 17 Dec 2009 21:26:14 +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 4B9A28FC19 for ; Thu, 17 Dec 2009 21:26:14 +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 C9E601C1A67 for ; Thu, 17 Dec 2009 22:26:12 +0100 (CET) Message-ID: <4B2AA1F4.5020206@locolomo.org> Date: Thu, 17 Dec 2009 22:26:12 +0100 From: Erik Norgaard User-Agent: Thunderbird 2.0.0.23 (Macintosh/20090812) MIME-Version: 1.0 To: questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Cc: Subject: 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 21:26:14 -0000 Hi: I have had this problem for a while, both on 7.x and now with 8.0: I have a: 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). Currently, I'm backing up to an external drive over the network. I don't know if it's network related or disk related, but I guess it's disk related as I have no log of the failure. I don't know if it's the disk, contoller or something else. This is a headless machine, so I'm left guessing. My two questions: - is there any utility that I can use monitor the system to see what's going on, when or why? - is there any way that I can slow down the disk i/o? since the system works fine in normal operation, I hope that slowing down the disk operation would be a workaround, at least till I get my data onto the external drive. Thanks, Erik -- Erik Nørgaard Ph: +34.666334818/+34.915211157 http://www.locolomo.org