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Date:	Tue, 24 Jul 2012 15:50:00 +0800
From:	Zheng Liu <>
To:	Tomasz Chmielewski <>
Subject: Re: "Setting filesystem feature 'metadata_csum' not supported" when
 trying to enable ext4 metadata checksums

On Tue, Jul 24, 2012 at 01:41:08PM +0700, Tomasz Chmielewski wrote:
> With Linux 3.5, it should be possible to use ext4 metadata
> checksums; enabling of which should be made with the following
> command:
> # tune2fs -O metadata_csum /dev/sda1
> tune2fs 1.42 (29-Nov-2011)
> Setting filesystem feature 'metadata_csum' not supported.
> Running kernel 3.5, tried the latest e2fsprogs from git.

Hi Tomasz,

Could you please checkout the 'pu' branch in e2fsprogs?  You need to
use pu branch of e2fsprogs because the patches of metadata checksum
for e2fsprogs are in this branch.

BTW, until 3.5 kernel, it seems that metadata checksum still has a bug.
Here is a patch to fix this bug [1].


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