Re: Btrfs prog

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On Wed, Sep 04, 2013 at 01:57:42PM +0200, Giuseppe Fierro wrote:
> I'm using btrfs on ubuntu 13.04 with btrfs prog v0.20-rc1
> This is my configuration using 2 disks in raid1 mode:
> 
> > gspe@jura:/mnt$ sudo btrfs f show
> > Label: 'UbuntuDSK'  uuid: f4a3c832-f6ab-4b1d-9eb7-f9ba7d1cba01
> > Total devices 2 FS bytes used 205.41GB
> > devid    1 size 2.70TB used 214.03GB path /dev/sdb2
> > devid    2 size 2.70TB used 214.01GB path /dev/sda2
> > Btrfs v0.20-rc1
> 
> 
> Some btrfs command behave strange:
> If i want to check free space using df, i get:
> 
> > gspe@jura:/mnt$ sudo btrfs filesystem df /
> > Data, RAID1: total=212.00GB, used=204.42GB
> > Data: total=8.00MB, used=0.00
> > System, RAID1: total=8.00MB, used=36.00KB
> > System: total=4.00MB, used=0.00
> > Metadata, RAID1: total=2.00GB, used=1010.04MB
> > Metadata: total=8.00MB, used=0.00

   What do you think is wrong with this output? It looks OK to me:

   From the btrfs fi show at the top, you have 214 GB allocated on
each device. The btrfs fi df shows you how that allocation is used:
212 GB (*2, because it's RAID-1) is allocated to data, with 204 GB
holding useful data. The remaining 2 GB (*2) is allocated to metadata,
and 1 GB of that is actually used.

> If I would like to show the subvolume, i get
> 
> > gspe@jura:/mnt$ sudo btrfs subvolume list /
> > gspe@jura:/mnt$
>
> nothing is shown!!!

   Try using the -a option. It got added a while ago, and has been a
complete pain in the neck ever since...

   Hugo.

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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