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Date:	Wed, 30 Jan 2008 11:31:53 -0600
From:	Eric Sandeen <>
To:	supersud501 <>
Subject: Re: e2fsck ext4 with extents possible?

supersud501 wrote:
> hello,
> 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?

No released e2fsprogs supports ext4 filesystems with new on-disk
features yet; that's partly what the "dev" on the end of "ext4dev.ko" is
for.  Ted's working on it.

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