I'm using snapper with BTRFS under Ubuntu 16.04, and I'm confused about the "mount" and "umount" parameters. They are documented like this in the man page:
mount number Mount a snapshot. Not required for all filesystem types. umount number Unmount a snapshot. Not required for all filesystem types.
But where are the snapshots mounted? Does snapper read my mind to know, or just makes an educated guess?
I know how to mount the snapshots using "mount" and the subvol ID, but I would like to know if these "mount" and "umount" options are just a joke or something you can actually use.
Thanks in advance.