Hallo, Oliver,
Du meintest am 10.11.10:
> # sudo btrfs filesystem show
> Label: none uuid: cd4fd4c1-0632-4cbe-bf3b-ba7a9acda1e0
> Total devices 2 FS bytes used 291.62GB
> devid 2 size 696.77GB used 146.63GB path /dev/sdb2
> devid 1 size 147.19GB used 146.64GB path /dev/sda2
What tells "df": about 300 GByte in use?
> Now I want to remove the smaller drive:
> # mount -t btrfs -o remount,degraded /dev/sda2 /
> # mount | grep /dev/sda2
> /dev/sda2 on / type btrfs (rw,degraded)
> # btrfs device delete /dev/sda2 /
> ERROR: error removing the device '/dev/sda2'
I've tried (with the above device names)
btrfs device delete /dev/sda2 /
btrfs filesystem balance /
Ok - I don't try these commands under "/" ...
And I haven't told the system to make a "raid0". I've created the first
btrfs partition only with
mkfs.btrfs /dev/sdxn
And I haven't used "degraded" after balancing the 2 partitions.
The "balance" command may take a long time; I've just seen about 2 days
for 1.5 TByte.
As long as "balance" works it throws messages into "/var/log/messages"
and can be watched with "top".
When "balance" has finished:
btrfs filesystem show 2>/dev/null
shouldn't show the "deleted" partition.
Viele Gruesse!
Helmut
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