Like the MOUNT parameter, the UNMOUNT parameter specifies a file that contains an executable routine. In this case, the executable routine is used to remove a tape from an automated backup device. The UNMOUNT parameter takes an absolute path name as an argument:
UNMOUNT/pathname
The file specified by the UNMOUNT parameter is executed when the Backup System closes a tape device (whether the close operation succeeds or fails).
The Backup System passes the following information to the executable routine:
· The tape device file path and name.
· The tape operation, which in this case is unmount.