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Date:	Wed, 30 Jan 2008 10:45:35 -0700
From:	Andreas Dilger <adilger@....COM>
To:	supersud501 <>
Subject: Re: e2fsck ext4 with extents possible?

On Jan 30, 2008  11:54 +0100, supersud501 wrote:
> i'm testing the ext4-filesystem for months now (no data loss experienced ), 
> but i noticed e2fsck not being able to check a ext4-filesystem with extents 
> ("e2fsck: Filesystem has unsupported feature(s)").
> i just pulled linus' kernel tree (with the newly added patches to ext4) and 
> e2fsprogs git tree (from, but still e2fsprogs is not able 
> to check my ext4-fs.
> so i wonder whether there's somewhere a patch for e2fsprogs flying around 
> i've missed or whether checking ext4 with extents is simply not supported 
> yet? if so, how's development going on with this?

There is an e2fsprogs RPM that can check ext4 filesystems with extents,
available at (no
warranties, etc).  We've been using this for a while already, and are
working to get the patches incorporated into the upstream e2fsprogs
in the interim while Ted is reimplementing the extents support.

Note the above RPMs contain patches which are NOT related just to ext4
and should not become part of a distro.

Cheers, Andreas
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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