Go forward to Inheritance Filesystem.
Go backward to Top-level Filesystem.
Go up to Filesystem Types.

Root Filesystem
===============

   The "root" (`type:=root') filesystem type acts as an internal
placeholder onto which Amd can pin `toplvl' mounts.  Only one node of
this type need ever exist and one is created automatically during
startup.  The effect of creating a second root node is undefined.