https://archive.kernel.org/oldwiki/btrfs.wiki.kernel.org/index.php/Main_Page.html
Installation
sudo apt install btrfs-progs
mkfs.btrfs /dev/sdX1
taille metadata ?
sudo btrfs subvolume list /media/BTRFS
sudo btrfs subvolume get-default /media/BTRFS
inodes
inodes identiques au sein de différents subvolumes : possible (car b-tree différent)
https://mpdesouza.com/blog/btrfs-for-mere-mortals-inode-allocation/