The multilevel Property

The multilevel property is used to enable the use of labels on the objects in a ZFS file system. Objects in a multilevel file system are individually labeled with an explicit sensitivity label attribute that is automatically generated. Objects can be relabeled in place by changing this label attribute, by using the setlabel or setflabel commands.

A root file system, an Oracle Solaris Zone file system, or a file system that contains packaged Oracle Solaris code should not be multilevel.