linux-ext4 - Re: EXT4-fs error w/ external USB drive

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Message-ID: <20121019210723.GA4721@thunk.org>
Date:	Fri, 19 Oct 2012 17:07:23 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Toralf Förster <toralf.foerster@....de>
Cc:	linux-ext4@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: EXT4-fs error w/ external USB drive

On Mon, Oct 15, 2012 at 07:46:02PM +0200, Toralf Förster wrote:
> Even with current stable kernel 3.6.2 I sometimes get those syslog messages :
> 
> 
> 2012-10-15T19:37:58.401+02:00 n22 kernel: EXT4-fs error (device sdb3): ext4_mb_generate_buddy:741: group 436, 22902 clusters in bitmap, 22901 in gd

Have you run e2fsck to clean up the file system corruption?  If you
have, do you continually get these errors afterwards?

You say this is an external USB disk; is there any possibility of the
disk getting unmounted uncleanly due to the cable getting pulled out
while the disk is still mounted, and then the disk getting remounted
w/o having e2fsck run on the disk?

					- Ted
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