From owner-freebsd-questions@FreeBSD.ORG Sun Feb 22 02:32:48 2004 Return-Path: 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 8156E16A4CE for ; Sun, 22 Feb 2004 02:32:48 -0800 (PST) Received: from iota.root-servers.ch (iota.root-servers.ch [193.41.193.195]) by mx1.FreeBSD.org (Postfix) with SMTP id 9550843D1D for ; Sun, 22 Feb 2004 02:32:47 -0800 (PST) (envelope-from gaml@buz.ch) Received: (qmail 73898 invoked from network); 22 Feb 2004 10:32:45 -0000 Received: from 217-162-134-28.dclient.hispeed.ch (HELO ?10.2.2.3?) (217.162.134.28) by 0 with SMTP; 22 Feb 2004 10:32:45 -0000 Date: Sun, 22 Feb 2004 11:34:49 +0100 From: Gabriel Ambuehl X-Priority: 3 (Normal) Message-ID: <1664802739.20040222113449@buz.ch> To: Heinrich Rebehn In-Reply-To: <40388FF1.4000004@ant.uni-bremen.de> References: <4037A0BB.8030807@ant.uni-bremen.de> <44n07c85md.fsf@be-well.ilk.org> <40388FF1.4000004@ant.uni-bremen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: questions@freebsd.org Subject: Re[2]: UNEXPECTED SOFTUPDATES INCONSISTENCY X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Gabriel Ambuehl List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Feb 2004 10:32:48 -0000 Hi Heinrich Rebehn, you wrote. >> Make sure you've disabled write caching on the drive firmware >> itself... HR> Does this also apply for RAID disks (twe)? Also, there is no word about HR> this in man tuning(7). Is this more of a guess or is softupdates HR> definately dangerous with wite cache enabled? I'd say it's the other way round: write cache is dangerous with softupdates. Softupdates itself is certainly better than no softupdates, even if it takes a slight performance drop by disabling write cache. I think you should disable the write cache on the 3ware cache (not sure whether there actually is one, mine don't come with any RAM sockets) anyway as you'll lose all data in there in the event of a crash. Regards, Gabriel