From owner-freebsd-stable@FreeBSD.ORG Thu Jul 14 19:45:22 2005 Return-Path: <owner-freebsd-stable@FreeBSD.ORG> X-Original-To: freebsd-stable@freebsd.org 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 97B6516A42F; Thu, 14 Jul 2005 19:45:22 +0000 (GMT) (envelope-from tolid@plab.ku.dk) Received: from plab.ku.dk (plab.ku.dk [130.225.107.20]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3CDB343D46; Thu, 14 Jul 2005 19:45:22 +0000 (GMT) (envelope-from tolid@plab.ku.dk) Received: from plab.ku.dk (localhost [127.0.0.1]) by plab.ku.dk (Postfix) with SMTP id 3404A5623F4; Thu, 14 Jul 2005 21:45:21 +0200 (CEST) Received: from [192.168.1.2] (david.tolid.eu.org [213.237.119.114]) by plab.ku.dk (Postfix) with ESMTP id C8BBB5623F3; Thu, 14 Jul 2005 21:45:20 +0200 (CEST) Message-ID: <42D6C0D0.6040106@plab.ku.dk> Date: Thu, 14 Jul 2005 21:45:20 +0200 From: Anatoliy Dmytriyev <tolid@plab.ku.dk> User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <20050714191449.A8A615D07@ptavv.es.net> In-Reply-To: <20050714191449.A8A615D07@ptavv.es.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: dangerous situation with shutdown process X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable> List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Thu, 14 Jul 2005 19:45:22 -0000 Kevin Oberman wrote: >SCSI or ATA? If it's ATA, turn off write cache with (atacontrol(8) or >the sysctl. > >The problem is that disks lie about whether they have actually written >data. If the power goes off before the data is in cache, it's lost. > >I am not sure if write-cache can be turned off on SCSI, but SCSI drives >seem less likely to lie about when the data is actually flushed to the >drive. > > SCSI, Adaptec 2110S -- Anatoliy Dmytriyev <tolid@plab.ku.dk>