I have the following RAID1 btrfs set:
Label: none uuid: 87595481-7b5c-464e-b10d-d9b2b0852e11
Total devices 4 FS bytes used 4.77TiB
devid 1 size 2.73TiB used 2.63TiB path /dev/sdb
devid 2 size 2.73TiB used 2.63TiB path /dev/sdc
devid 3 size 2.73TiB used 2.63TiB path /dev/sdd
devid 4 size 2.73TiB used 2.63TiB path /dev/sde
Btrfs v3.12
However I now have a robust backup solution and would like to get some of that RAID space back and just go JBOD as the data is reproducible and for this box I care more about capacity than reliability.
According to the btrfs wiki moving up to RAID1 from a JBOD setup is quite straightforward: btrfs fi balance start -dconvert=raid1 /mnt
Is it as simple as btrfs fi balance start -dconvert=single /mnt
? What about the metadata? It's probably a good idea to leave that in RAID1 I assume?
Preparatory steps made:
- Backups complete
- 14.04 trusty with wily backported 4.2.0 kernel