Use the following procedure to unmount a file system.
# umount /mount-point
where /mount-point is the name of the file system that you want to unmount.
This name can be one of the following:
The directory name where the file system is mounted
The device name path of the file system
The resource for an NFS file system
The loopback directory for an LOFS file system
The following example shows how to unmount a legacy UFS file system:
# umount /legacy
The following example shows how to forcibly unmount the UFS /legacy file system:
# umount -f /legacy
The following example shows to unmount all ZFS file systems:
# zfs umount -a
All file systems are unmounted, except for those file systems that are busy.