linux-kernel - Re: Mild filesystem corruption on ext4 (no journal)

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Message-ID: <4A29601F.3070802@redhat.com>
Date:	Fri, 05 Jun 2009 13:12:47 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
CC:	Aioanei Rares <krnl.list@...il.com>, linux-ext4@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Mild filesystem corruption on ext4 (no journal)

Alan Jenkins wrote:
> Eric Sandeen wrote:

>> Maybe you could try some things in your shutdown script, such as
>> explicitly fsyncing the file, or bmapping it with filefrag, or dropping
>> caches and rereading it... see what the state is just before the
>> shutdown compared to after the reboot.
>>
>> -Eric
>>   
> 
> Dropping caches (and running sync first) had no effect on the result of 
> md5sum.  Hopefully that narrows it down a bit.

And did the reread after dropping caches have the right data?

Did the block numbers reported by filefrag -v change post-boot?

-Eric
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