Re: Btrfs prog

[Giuseppe Fierro <giuseppe@fierro.org>]

Thanks,
as I can see I misunderstood the meaning of "btrfs filesystem df" I
was expecting that the 'df' has been to display free space remaining.

The -a option works

Giuseppe Fierro

On 4 September 2013 15:32, Hugo Mills <hugo@carfax.org.uk> wrote:
> 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 ===
>   PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
>    --- The English language has the mot juste for every occasion. ---



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