Nop. Você só pode ter btrfs fi sh
e btrfs fi df /
. Por exemplo:
# btrfs fi sh
Label: 'rootfs' uuid: 44d484b7-a780-43a2-a1e4-fc98bac776e6
Total devices 1 FS bytes used 3.16GiB
devid 1 size 46.56GiB used 6.06GiB path /dev/mapper/sda3_crypt
Label: 'boot' uuid: 2772f08c-8029-4cc5-8a43-11aa7a5dc699
Total devices 3 FS bytes used 69.43MiB
devid 1 size 238.00MiB used 192.00MiB path /dev/sda2
devid 2 size 238.00MiB used 80.00MiB path /dev/sdb2
devid 3 size 238.00MiB used 112.00MiB path /dev/sdc2
Label: 'home' uuid: fcfafad3-86f6-462d-9054-aee438acb548
Total devices 3 FS bytes used 456.93GiB
devid 1 size 884.71GiB used 319.03GiB path /dev/mapper/sda4_crypt
devid 2 size 884.67GiB used 318.00GiB path /dev/mapper/sdb4_crypt
devid 3 size 884.71GiB used 319.03GiB path /dev/mapper/sdc4_crypt
Btrfs v3.14.1
# btrfs fi df /home
Data, RAID1: total=476.00GiB, used=456.21GiB
System, RAID1: total=32.00MiB, used=112.00KiB
Metadata, RAID1: total=2.00GiB, used=729.53MiB