Re: ERROR: error during balancing '.' - No space left on device

[Marc MERLIN <marc@merlins.org>]

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On Sun, Mar 23, 2014 at 12:10:17PM -0700, Marc MERLIN wrote:
> On Sun, Mar 23, 2014 at 05:34:09PM +0000, Hugo Mills wrote:
> >    xaba on IRC has just pointed out that it looks like you're running
> > this on a mounted filesystem -- it needs to be unmounted for
> > btrfs-image to work reliably.
>  
> Sorry, I didn't realize that, although it makes sense. btrfs-image really
> should fail though:
> https://bugzilla.kernel.org/show_bug.cgi?id=72791
> 
> I got the image, but it's 1.5GB (1TB filesystem), but kernel bugzilla times
> out after 1% of upload (repeatedly)
> Placeholder bug:
> https://bugzilla.kernel.org/show_bug.cgi?id=72801

Here is the image:
http://marc.merlins.org/tmp/pool2.image

After taking that image for you, I got the filesysetm to recover:
legolas:/mnt/btrfs_pool2# for i in *weekly*; do btrfs subvolume delete $i;
done
Delete subvolume '/mnt/btrfs_pool2/home_weekly_20140309_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/home_weekly_20140316_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/root_weekly_20140309_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/root_weekly_20140316_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/tmp_weekly_20140309_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/tmp_weekly_20140316_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/usr_weekly_20140309_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/usr_weekly_20140316_00:06:01'
Delete subvolume '/mnt/btrfs_pool2/var_weekly_20140309_00:06:01'
^A Delete subvolume '/mnt/btrfs_pool2/var_weekly_20140316_00:06:01'

legolas:/mnt/btrfs_pool2# btrfs fi df .
Data, single: total=800.42GiB, used=636.91GiB
System, DUP: total=8.00MiB, used=92.00KiB
System, single: total=4.00MiB, used=0.00
Metadata, DUP: total=10.00GiB, used=9.50GiB
Metadata, single: total=8.00MiB, used=0.00
legolas:/mnt/btrfs_pool2# btrfs balance start -v -dusage=0 /mnt/btrfs_pool2

Dumping filters: flags 0x1, state 0x0, force is off
  DATA (flags 0x2): balancing, usage=0
  Done, had to relocate 91 out of 823 chunks

legolas:/mnt/btrfs_pool2# btrfs fi df .
Data, single: total=709.01GiB, used=603.85GiB
System, DUP: total=8.00MiB, used=88.00KiB
System, single: total=4.00MiB, used=0.00
Metadata, DUP: total=10.00GiB, used=7.39GiB
Metadata, single: total=8.00MiB, used=0.00

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/  

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