Btrfs devel - Jul 2012 - btrfs-convert complains that fs is mounted even if it isn't

Hi,

I''m trying to run btrfs-convert on a system that has three raid 
partitions (boot/md1, swap/md2 and root/md3). When I boot a rescue 
system from md1, and try to run "btrfs-convert /dev/md3", it complains
that /dev/md3 is already mounted, although it definitely is not. The 
only partition mounted is /dev/md1 because of the rescue system. When I 
replicate the setup in a local VM, booting the rescue system from 
another disk (no /dev/md1 mounted) helps, btrfs-convert runs. However, 
I cannot do this on the server.

Is there anything I can do about this?

Regards,
Jochen


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On Sun, Jul 22, 2012 at 2:51 PM, Jochen <jochen3941@gmail.com>
wrote:
> Hi,
>
> I''m trying to run btrfs-convert on a system that has three raid
partitions
> (boot/md1, swap/md2 and root/md3). When I boot a rescue system from md1,
and
> try to run "btrfs-convert /dev/md3", it complains that /dev/md3
is already
> mounted, although it definitely is not. The only partition mounted is
> /dev/md1 because of the rescue system. When I replicate the setup in a
local
> VM, booting the rescue system from another disk (no /dev/md1 mounted)
helps,
> btrfs-convert runs. However, I cannot do this on the server.
>
> Is there anything I can do about this?
Can you mount and cleanly umount /dev/md3 and try the convert again?
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