Hallo, Swâmi,
Du meintest am 14.05.11:
>>> # btrfs fi df /
>>> Data: total=74.01GB, used=72.77GB
>>> System, DUP: total=8.00MB, used=16.00KB
>>> System: total=4.00MB, used=0.00
>>> Metadata, DUP: total=1.75GB, used=657.48MB
>>> Metadata: total=8.00MB, used=0.00
>> btrfs filesystem show
> root@tethys:~# df -t btrfs
> Sys. de fichiers 1K-blocs Utilisé Dispo. Uti% Monté
> sur /dev/mapper/VG1-TETHYS
> 152735744 78383976 71999272 53% /
> /dev/mapper/VG1-TETHYS
> 152735744 78383976 71999272 53% /tmp
> /dev/mapper/VG1-TETHYS
> 152735744 78383976 71999272 53% /home
> /dev/mapper/VG1-TETHYS
> 152735744 78383976 71999272 53% /var
> /dev/sda2 392192 26772 193660 13% /boot
> root@tethys:~# btrfs filesystem show
> failed to read /dev/sr0
> Label: 'TETHYS_BOOT' uuid: b6b9e7ef-5aae-4c49-8b5a-39d6eec1d7d7
> Total devices 1 FS bytes used 25.76MB
> devid 1 size 383.00MB used 240.50MB path /dev/sda2
> Label: 'TETHYS' uuid: 82c61fc2-8f8c-4cce-9d0d-ed446f671062
> Total devices 1 FS bytes used 74.11GB
> devid 1 size 145.66GB used 77.54GB path /dev/dm-1
Ok - just for your information the messages of my system, created with
mkfs.btrfs -d raid0 -m raid1 ...
# btrfs filesystem show
Label: 'MMedia' uuid: 120b036a-883f-46aa-bd9a-cb6a1897c8d2
Total devices 3 FS bytes used 1.68TB
devid 2 size 1.81TB used 603.02GB path /dev/sdb1
devid 1 size 1.82TB used 599.51GB path /dev/sde1
devid 3 size 1.81TB used 603.01GB path /dev/sdc1
Btrfs Btrfs v0.19
# btrfs filesystem df /srv/MM
Data, RAID0: total=1.75TB, used=1.67TB
System, RAID1: total=16.00MB, used=116.00KB
System: total=4.00MB, used=0.00
Metadata, RAID1: total=4.25GB, used=2.53GB
# df -t btrfs
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sdb1 btrfs 5846053400 1803934240 2718410984 40% /srv/MM
----------------------------------------
I don't know what's the meaning of the type "DUP" (instead of "RAID0" or
"RAID1" in my example).
In your case "btrfs filesystem df" seems to show something about special
informations and their need of space but nothing about used space or
available space.
Some weeks ago there has been a thread about the informations of "df",
"btrfs filesystem df" and "btrfs filesystem show"; most times there may
be shown the "at least available space".
Viele Gruesse!
Helmut
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