Backups with Manually Changed Media 
Prerequisites
You have started a
backup to a single backup medium or a backup to a group of parallel backup media.The capacity of the
backup medium or backup media inserted is not sufficient for the selected backup. The advancing bar showing the progress of the backup stops before reaching 100%.
You are prompted to insert the succeeding medium.
Procedure
Succeeding Medium is Tape

We recommend you specify the exact capacity of the medium when defining the medium. Provided the tape device driver gives a reliable indication when the end of the tape is reached, the Database Manager GUI reacts as described even when
Succeeding Medium is a File
Repeat the procedure appropriate to the media type until the backup process has been completed.
As long as the backup process is being performed, no other backup can be started. A backup process is complete when the message
Backup completed appears.