If you no longer need to access the data in a file system, you can unmount the file system using the umount command.
Before unmounting a file system, review the following:
To unmount a file system
Use the fuser command to make sure that the file system is not being used:
# fuser -c /mount_point
where the -c option provides information on file system mount points and any files within mounted file systems.
If the file system is being used and you need to unmount it, use the fuser -ck command. See the fuser(1M) man page for more information.
Unmount the file system using one of the umount command options:
The following is an example of unmounting a file system:
To verify that the file system /db01 is not in use and then unmount the file system:
# fuser -c /db01 /db01: # umount /db01