From: Roman Mamedov <rm@romanrm.net>
To: Hugo Mills <hugo@carfax.org.uk>
Cc: "Тимофей Титовец" <nefelim4ag@gmail.com>, linux-btrfs@vger.kernel.org
Subject: Re: btrfs-convert won't convert ext* - No valid Btrfs found on /dev/sdb1
Date: Thu, 5 Sep 2013 21:06:19 +0600 [thread overview]
Message-ID: <20130905210619.65e52e23@natsu> (raw)
In-Reply-To: <20130905145407.GA25694@carfax.org.uk>
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On Thu, 5 Sep 2013 15:54:07 +0100
Hugo Mills <hugo@carfax.org.uk> wrote:
> On Thu, Sep 05, 2013 at 05:43:27PM +0300, Тимофей Титовец wrote:
> > Hello guys, i try to convert ext4 volume, but btrfs-convert show me error:
> > "No valid Btrfs found on file
> > unable to open ctree
> > conversion aborted."
> > Ubuntu 13.04
> > Kernel: 3.11
> > btrfs-progs git version 0.20-git20130822~194aa4a13
> >
> > way to reproduce error:
> > $ truncate -s 4G file
> > $ mkfs.ext4 file #say yes to create fs on non block device.
> > $ btrfs-convert file
> > No valid Btrfs found on file
> > unable to open ctree
> > conversion aborted.
>
> I'm guessing here, but I suspect you will need to create a loopback
> device so that btrfs-convert can look at it as a block device rather
> than as a file:
>
> # losetup -f --show file
> /dev/loop0
> # btrfs-convert /dev/loop0
>
> Hugo.
>
Nope, just today I saw someone report the same problem in a blog comment:
http://popey.com/blog/2013/09/02/fun-with-btrfs-on-ubuntu/#comment-9704
-------
# umount /dev/sdb1
# fsck -f /dev/sdb1
fsck из util-linux 2.20.1
e2fsck 1.42.8 (20-Jun-2013)
data500: 144653/30531584 files (0.9% non-contiguous), 102659367/122096384
blocks
# btrfs-convert /dev/sdb1
No valid Btrfs found on /dev/sdb1
unable to open ctree
conversion aborted.
Ubuntu 13.10
btrfs-tools 0.19+20130705-1
-------
It looks like a bug in btrfs-convert.
--
With respect,
Roman
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next prev parent reply other threads:[~2013-09-05 15:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-05 14:43 btrfs-convert won't convert ext* - No valid Btrfs found on /dev/sdb1 Тимофей Титовец
2013-09-05 14:54 ` Hugo Mills
2013-09-05 15:06 ` Roman Mamedov [this message]
2013-09-05 15:30 ` Hugo Mills
2013-09-05 15:34 ` Roman Mamedov
2013-09-05 15:44 ` Hugo Mills
2013-09-05 15:45 ` Eric Sandeen
2013-09-05 18:44 ` Josef Bacik
2013-10-11 7:52 ` Daniel
2013-10-11 8:00 ` Wang Shilong
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