On Thu, Sep 05, 2013 at 09:06:19PM +0600, Roman Mamedov wrote: > On Thu, 5 Sep 2013 15:54:07 +0100 > Hugo Mills <h...@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
It's the same person, in fact. I'd not seen that the one on popey's blog was doing it with block devices. This does indeed look like a fairly drastic bug... Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Is it true that "last known good" on Windows XP --- boots into CP/M?
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