Unmounting a File System

If you no longer need to access the data in a file system, you can unmount the file system using the umount command.

Prerequisites

• A file system must exist and be mounted in order to be unmounted.

Usage Notes

• See the umount(1M) manual page for more information on mounting file systems.
• You cannot unmount a file system that is in use.

  To unmount a file system using the command line

1. 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.

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     Note    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.

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2. Unmount the file system using the umount command:
               # umount special

   or

   
      # umount /mount_point

   or

   
      # umount -f /mount_point

   where:

   • special is a block special device
   • /mount_point is the location where the file system is mounted
   • -f forcibly unmounts the mount point

Example

To verify that the file system /db01 is not in use and then unmount the file system:

  To unmount a file system on a volume using the GUI

1. Select the volume containing the file system to be unmounted.
2. Choose Actions > File System > Unmount File System.
3. Click Yes in the Unmount File System dialog box to confirm that you want to unmount the file system.
4. If an entry exists for a file system in the file system table, a Remove File System dialog appears. Click Yes in the Remove File System dialog if you want the file system table entry removed.