4

When using btrfs, why "Size", "Used" and "Avail" values from df do not match?

view full story
linux-howto

http://unix.stackexchange.com – I have a btrfs partition. When I run df -h, it shows: Filesystem Size Used Avail Use% Mounted on /dev/sda2 113G 101G 8.3G 93% /home From Why is that? Is it because reserved space for root as wth ext2/3/4? Or is it something else? If the former, how can I change it and reclaim those 4GB ? As per btrfs wiki, I know that metadata are stored twice which inflates the size of "Used" data: user@machine:~$ df -h / Filesystem Size Used Avail Use% Mounted on /dev/sda1 894G 311G 583G 35% / ^^^^ user@machine:~$ btrfs fi df / Metada (HowTos)