Ubuntu
btrfs-tools package

  1. Bug #880645
  2. Comment #8

Comment 8 for bug 880645

Revision history for this message
Ketil Malde (ketil-ii) wrote :

I get an error when trying to remove one disk from a set of three (so metadata could still be mirrored). This is on Precise Pangolin. I also include the output of "filesystem show", as something clearly happened here, although I'm unsure how to interpret it.

% sudo btrfs fi show
Label: 'scratch' uuid: 184706ea-89f5-438a-a9f5-b5e91b3ce267
        Total devices 3 FS bytes used 140.62GB
        devid 1 size 2.73TB used 138.02GB path /dev/sda
        devid 2 size 2.73TB used 137.01GB path /dev/sdb
        devid 3 size 2.73TB used 138.01GB path /dev/sdc

% sudo btrfs dev del /dev/sdc /scratch
ERROR: error removing the device '/dev/sdc'

% sudo btrfs fi show
Label: 'scratch' uuid: 184706ea-89f5-438a-a9f5-b5e91b3ce267
        Total devices 3 FS bytes used 141.49GB
        devid 1 size 2.73TB used 75.03GB path /dev/sda
        devid 2 size 2.73TB used 75.01GB path /dev/sdb
        devid 3 size 2.73TB used 138.01GB path /dev/sdc

Btrfs Btrfs v0.19