A usage parancs váltja le a df-et:
> btrfs fi usage /
Overall:
Device size: 126.95GiB
Device allocated: 114.03GiB
Device unallocated: 12.92GiB
Device missing: 0.00B
Used: 73.90GiB
Free (estimated): 51.36GiB (min: 51.36GiB)
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:110.00GiB, Used:71.56GiB
/dev/sda2 110.00GiB
Metadata,single: Size:4.00GiB, Used:2.34GiB
/dev/sda2 4.00GiB
System,single: Size:32.00MiB, Used:16.00KiB
/dev/sda2 32.00MiB
Unallocated:
/dev/sda2 12.92GiB