From owner-freebsd-stable@FreeBSD.ORG Thu Jun 30 06:06:31 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from green.homeunix.org (freefall.freebsd.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 6E92716A41C; Thu, 30 Jun 2005 06:06:30 +0000 (GMT) (envelope-from green@green.homeunix.org) Received: from green.homeunix.org (green@localhost [127.0.0.1]) by green.homeunix.org (8.13.3/8.13.1) with ESMTP id j5U66TfA035916; Thu, 30 Jun 2005 02:06:29 -0400 (EDT) (envelope-from green@green.homeunix.org) Received: (from green@localhost) by green.homeunix.org (8.13.3/8.13.1/Submit) id j5U66Ckw035915; Thu, 30 Jun 2005 02:06:12 -0400 (EDT) (envelope-from green) Date: Thu, 30 Jun 2005 02:06:12 -0400 From: Brian Fundakowski Feldman To: Steven Hartland Message-ID: <20050630060612.GF1074@green.homeunix.org> References: <200506291704.50185.ndenev@icdsoft.com> <059901c57cb4$9a366220$7f06000a@int.mediasurface.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <059901c57cb4$9a366220$7f06000a@int.mediasurface.com> User-Agent: Mutt/1.5.6i Cc: Niki Denev , freebsd-stable@freebsd.org Subject: Re: background fsck can be dangerous! X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Jun 2005 06:06:31 -0000 On Wed, Jun 29, 2005 at 03:12:37PM +0100, Steven Hartland wrote: > I've not had a single crash / power outage that background fsck has > been able to deal with. 90% of the time the machine will fail to even > boot to single user mode :( You should turn write caching off on your drives. > Steve > ----- Original Message ----- > From: "Niki Denev" > > >I want just to share my last experience with the combination of > >power failure + background fsck. After the power returned and the > >machine booted, it sheduled background fsck after 60 seconds, but > >at this point most of the services were already started, and some of them > >seemed to rely on files that were probably in unclean state before the > >check. > >This unfortunately leaded to some lost email...after the fsck completed, > >everything runs ok, but i have now set background_fsck to NO in rc.conf. > > > >Here is a sad sample from my qmail log file : > >@4000000042c1badc24fc21cc delivery 1: > >success: > >/libexec/ld-elf.so.1:_Shared_object_"libpq.so.3"_not_found,_required_by_"dspam"/did_0+0+1/ > >@4000000042c1badc24fff25c status: local 2/30 remote 0/20 > >@4000000042c1badc250151ec delivery 4: > >success: > >/libexec/ld-elf.so.1:_Shared_object_"libpq.so.3"_not_found,_required_by_"dspam"/did_0+0+1/ > >@4000000042c1badc2502bd34 status: local 1/30 remote 0/20 > >@4000000042c1badc25050ef4 end msg 23982 > >@4000000042c1badc2508b0a4 delivery 2: > >success: > >/libexec/ld-elf.so.1:_Shared_object_"libpq.so.3"_not_found,_required_by_"dspam"/did_0+0+1/ > >@4000000042c1badc250a9cd4 status: local 0/30 remote 0/20 > >@4000000042c1badc250c7d4c end msg 24087 > >@4000000042c1badc2510942c end msg 24040 The filesystem looks the same before, during, and after background fsck runs, other than the free space information. -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\