System Administration Guide: Oracle Solaris Containers-Resource Management and Oracle Solaris Zones

Unmounting File Systems in Zones

The ability to unmount a file system will depend on who performed the initial mount. If a file system is specified as part of the zone's configuration using the zonecfg command, the global zone owns this mount and the zone administrator for the non-global cannot unmount the file system. If the file system is mounted from within the non-global zone, for example, by specifying the mount in the zone's /etc/vfstab file, the zone administrator in the non-global zone can unmount the file system.