From owner-freebsd-questions@FreeBSD.ORG Sun May 9 11:55:01 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 19CF21065672 for ; Sun, 9 May 2010 11:55:01 +0000 (UTC) (envelope-from ansarm@gmail.com) Received: from mail-yx0-f175.google.com (mail-yx0-f175.google.com [209.85.210.175]) by mx1.freebsd.org (Postfix) with ESMTP id C16E78FC1F for ; Sun, 9 May 2010 11:55:00 +0000 (UTC) Received: by yxe5 with SMTP id 5so1288145yxe.3 for ; Sun, 09 May 2010 04:55:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=QMT02X7E4YK9md5l3d3hAxv/KZyau/SnncEdVd4ICMU=; b=IyEYL+jeIb7kdbopiEfXH/rRePq/lX6YM1YlZCgyRuUylatxkFXIjOvLGXRcOwLqM1 Y8v5iQ+SLNTlFqkxJT8LxhTPKIaxGWDBbLviGjMWPj5yZkcd/yBh2LfrhCFyEubhBtFy Ucpx95PdgTyUNdOE/3Zdk2Y/a9vbMkk2AzI5o= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=nkmmxwnD5r80zmys4F+8b471S5uRj2ladMLQbSUCQAO5ZPxG/GD/AoWLw3V0FzCft+ yXKvLqNt4oLXa/P/ty8lFSNO6pGge7rofHG6rGH/QoVtbchYS8LxPpv8E0/5IsLSkDUk HDI69oVUrvjVdFcn+Ku/HnW+ArMF+6PDn7ZSs= MIME-Version: 1.0 Received: by 10.231.149.71 with SMTP id s7mr1015206ibv.86.1273406099402; Sun, 09 May 2010 04:54:59 -0700 (PDT) Received: by 10.231.119.97 with HTTP; Sun, 9 May 2010 04:54:59 -0700 (PDT) In-Reply-To: <201005091046.08871.bruce@cran.org.uk> References: <201005091046.08871.bruce@cran.org.uk> Date: Sun, 9 May 2010 07:54:59 -0400 Message-ID: From: Ansar Mohammed To: Bruce Cran Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Bobby Walker , freebsd-questions@freebsd.org Subject: Re: File system 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: Sun, 09 May 2010 11:55:01 -0000 Thank you Bruce and Matthew, for your very informed and insightful comments. I read online that this may be fixed in FreeBSD 9 with jeff's UFS Journaling patch. Have you guys tried this yet? http://jeffr-tech.livejournal.com/ On Sun, May 9, 2010 at 5:46 AM, Bruce Cran wrote: > On Sunday 09 May 2010 04:18:12 Ansar Mohammed wrote: > > > The background to this problem is because the FreeBSD root filesystem > (UFS) > > is not journaled and for some reason I cannot set my root partition to be > > UFS+SoftUpdates. > > > > At any rate, we are in the year 2010, most modern operating systems and > > databases and able to survive an unclean shutdown without booting into > > single user mode and file system/data corruption. > > Even with SoftUpdates and journaling you'll find UFS doesn't cope well with > unclean shutdowns: to test it, a couple of weeks ago I started a "rm -rf > /usr/obj/*" and pressed the reset button - upon startup I got dumped into > single-user mode with a softupdates inconsistency. I've not tried the same > test but I think ZFS is much better at recovering from this sort of problem > since it was designed from the start to be very resilient. > > -- > Bruce Cran >