On FreeBSD I wish to see all mounted disks and all of their mount locations.
For example this shows my disks.
[root@freenas] ~# sysctl kern.disks
kern.disks: xbd2 xbd1 ada0
[root@freenas] ~#
Now I have the disks but I don't know where they are mounted.
You can use the mount command
Then parse the output looking for the disks you are interested in.