Date: Thu, 30 Jun 2005 02:06:12 -0400 From: Brian Fundakowski Feldman <green@freebsd.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: Niki Denev <ndenev@icdsoft.com>, freebsd-stable@freebsd.org Subject: Re: background fsck can be dangerous! Message-ID: <20050630060612.GF1074@green.homeunix.org> In-Reply-To: <059901c57cb4$9a366220$7f06000a@int.mediasurface.com> References: <200506291704.50185.ndenev@icdsoft.com> <059901c57cb4$9a366220$7f06000a@int.mediasurface.com>
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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" <ndenev@icdsoft.com> > > >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. \,,,,,,,,,,,,,,,,,,,,,,\
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