Newly added disks not used after "soft" rebalance, not used after rebalance < 1%

[Leszek Dubiel <leszek@xxxxxxxxx>]

Added /dev/sdb3, /dev/sdd3 and /dev/sdf3 to btrfs filesystem:


Label: none  uuid: 44803366-3981-4ebb-853b-6c991380c8a6
    Total devices 6 FS bytes used 8.20TiB
    devid    2 size 5.45TiB used 4.36TiB path /dev/sda2
    devid    3 size 5.45TiB used 4.36TiB path /dev/sdc2
    devid    4 size 10.90TiB used 8.71TiB path /dev/sde3
    devid    5 size 9.06TiB used 0.00B path /dev/sdb3 <<<
    devid    6 size 5.43TiB used 0.00B path /dev/sdd3 <<<<
    devid    7 size 3.61TiB used 0.00B path /dev/sdf3 <<<<



Filessytem df looks good 20T of filesystem:

root@wawel:~# df -h /
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        20T  8.3T  9.2T  48% /



But disks seem to be NOT used by btrfs:

root@wawel:~# btrfs dev usag /
/dev/sda2, ID: 2
   Device size:             5.45TiB
   Device slack:              0.00B
   Data,RAID1:              4.28TiB
   Metadata,RAID1:         89.00GiB
   Unallocated:             1.09TiB

/dev/sdb3, ID: 5
   Device size:             9.06TiB   <<<<  no data usage?
   Device slack:            3.50KiB
   Unallocated:             9.06TiB

/dev/sdc2, ID: 3
   Device size:             5.45TiB
   Device slack:              0.00B
   Data,RAID1:              4.28TiB
   Metadata,RAID1:         83.00GiB
   System,RAID1:           32.00MiB
   Unallocated:             1.09TiB

/dev/sdd3, ID: 6
   Device size:             5.43TiB <<<<<<<<????
   Device slack:            3.50KiB
   Unallocated:             5.43TiB

/dev/sde3, ID: 4
   Device size:            10.90TiB
   Device slack:            3.50KiB
   Data,RAID1:              8.55TiB
   Metadata,RAID1:        162.00GiB
   System,RAID1:           32.00MiB
   Unallocated:             2.19TiB

/dev/sdf3, ID: 7
   Device size:             3.61TiB   <????
   Device slack:            3.50KiB
   Unallocated:             3.61TiB



Newly added disks seemed not to be used... So I've done:

btrfs balance start -dconvert=raid1,soft -mconvert=raid1,soft /


It didn't help. So I used:



root@wawel:~# btrfs balance start -dusage=0 -musage=0 /
Done, had to relocate 0 out of 9050 chunks


then:


root@wawel:~# btrfs balance start -dusage=1 -musage=1 /
Done, had to relocate 106 out of 9050 chunks



And I still don't see any usage of the devices...


Shall I activate these newly added block devices somehow?
Those 106 reallocated chunks should have been put to new devices, right?


Thank you.