Date: Thu, 30 Jun 2005 09:47:31 -0400 From: JM <jmartin37@speakeasy.net> To: Brian Fundakowski Feldman <green@freebsd.org> Cc: Niki Denev <ndenev@icdsoft.com>, Steven Hartland <killing@multiplay.co.uk>, freebsd-stable@freebsd.org Subject: Re: background fsck can be dangerous! Message-ID: <42C3F7F3.809@speakeasy.net> In-Reply-To: <20050630060612.GF1074@green.homeunix.org> References: <200506291704.50185.ndenev@icdsoft.com> <059901c57cb4$9a366220$7f06000a@int.mediasurface.com> <20050630060612.GF1074@green.homeunix.org>
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Brian Fundakowski Feldman wrote: >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. > > and in addition to that... you can enable a foreground fsck at boot which might be the better option if boot times aren't an issue. > > >> 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. > > >
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