Btrfs subvolume questions
Yes you have to mount it, and if you want to convert a directory into a subvolume what you can do is create a snapshot using
btrfs subvolume snapshot <name of subvolume containing folder> @new_subvol
Then you could go into the subvolume and delete everything other than @new_subvol/home for instance and move everything in home to the root of the new subvolume with something like
mv @new_subvol/home/* @new_subvol
Then you could delete the original directory and move the newly created snapshot into its place.
- Yes.
- No.
At least not at the moment.