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Date:      Mon, 30 Jun 2008 12:30:38 -0400
From:      Jim <stapleton.41@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: filesystem information
Message-ID:  <80f4f2b20806300930p67ca1fd5xf9ad59d16889df36@mail.gmail.com>
In-Reply-To: <20080630073059.be11304d.wmoran@potentialtech.com>
References:  <80f4f2b20806300401x71483882x8e9a6cf919f1ff9@mail.gmail.com> <20080630073059.be11304d.wmoran@potentialtech.com>

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On Mon, Jun 30, 2008 at 7:30 AM, Bill Moran <wmoran@potentialtech.com> wrote:
> In response to Jim <stapleton.41@gmail.com>:
>
>> I have a computer that is in a situation where it is losing power
>> occasionally. All but one of the filesystems are going along fine.
>> Once file system seems to lose data on a power outage. Even if it only
>> reads a file, and doesn't write it, it may still lose a file (ex,
>> about half the audio files on my xmms playlist, a couple data files in
>> my wine directory that, to my knowledge, are unlikely to be written
>> after they are first installed).
>>
>> What I'd like to do is get an output of the flags and options on my
>> filesystems to see what is different between that filesystem and the
>> others. Any suggestion on how to do that? This particular FS has
>> lasted through several rebuilds since it doesn't hold OS critical
>> stuff, just data files.
>
> tunefs -p and/or dumpfs -m
>
>> Any suggestions?
>
> Sounds like you're on the right track with hunting this down.  Perhaps
> turn softupdates off and mount the filesystem sync if you're seeing
> lots of power outages.
>
> --
> Bill Moran
> http://www.potentialtech.com
>

Thanks, it looks like the 'good' filesystems have softupdates off
(except one), and the one the broke has it off. I thought softupdates
were supposed to fix this? Is gjournal a better solution? Is 'just use
neither' a better solution? Any reference material on the subject
would be appreciated (I'm about to use google now).

Thanks,
-Jim Stapleton



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