Fediquestion: Can anyone explain/point me at documentation that explains what exactly btrfs means with its "allocated" and "unallocated" metrics in ``btrfs filesystem show? All I can find is "running a balance fixedthis for me", but no explanation of why it does that or what unallocated actually means, the explanation in the manpage isn't very helpful to me. In my case I have a btrfs on top of a single lvm volume with no btrfs-raid features enabled. #btrfs #linux