linux-ext4 - Re: Filesystem recovery - e2fsck seems to have caused my filesystem to get wiped

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Date:	Wed, 30 Oct 2013 17:00:04 +0100
From:	Bernd Schubert <bernd.schubert@...tmail.fm>
To:	Eric Sandeen <sandeen@...hat.com>,
	Regan Wallace <regan@...anw.com>, linux-ext4@...r.kernel.org,
	"Darrick J. Wong" <djwong@...ibm.com>
Subject: Re: Filesystem recovery - e2fsck seems to have caused my filesystem
 to get wiped

>
> # tune2fs -f -O ^has_journal sda1.img
> tune2fs 1.41.12 (17-May-2010)
> The needs_recovery flag is set.  Please run e2fsck before clearing
> the has_journal flag.
>
> nope, not even with force.  Grr.
>
> Maybe this will work; get the journal inode number & clear it:
>
> # dumpe2fs -h sda1.img  | grep "Journal inode"
> dumpe2fs 1.41.12 (17-May-2010)
> Journal inode:            8
>
> # debugfs -w -R "clri <8>" sda1.img
>
> now e2fsck will think the journal is invalid & just zap it:
>
> e2fsck 1.41.12 (17-May-2010)
> Superblock has an invalid journal (inode 8).
> Clear<y>?
>
> *maybe* that will get your e2fsck past the journal recovery problem
> w/o needing the mkfs.ext4 -S giant hammer.

Why not just unset the journal feature bit using debugfs?

debugfs -w -R "features ^has_journal"  sda1.img


And I would update e2fsprogs to the current version.


Cheers,
Bernd
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