Backups to media with continuation media are only useful if there is only one output device. Whenever possible, the backup should always be done to several parallel media rather than to a medium with continuation media.
Interactive Procedure:
1. Select the save action.
2. Select the medium.
3. Check the entries.
4. Start the save operation.
5. Mount the next volume and continue the save operation.
Steps 1 to 4 are the same as for saving to an individual medium.
If the medium is not large enough, the progress indicator stops before the medium is full, and a screen appears requesting you to mount the next medium.
5. Mount the Next Medium and Continue the Save Operation
If the medium is a tape, simply mount the next tape and click on the Ok button or press the 
key. If the medium is a file, you can specify the path name of the next file
(after pressing the 
key). You can change the capacity of the medium, and you can select another type for the continuation medium.
The save operation is continued with the Ok button. Before clicking on the Ok button, you should make sure that the tape just written was placed in safety and the right tape has been mounted.
Step 5 must be repeated as often as is needed to terminate the backup or until it is canceled.
In the "device", "type", and "size" fields, the screen shows the specifications valid for the previous medium. After pressing the 
key, these fields are updatable. The label
that CONTROL will write to the next medium appears in the "label" field which is write-protected.
We recommend to specify the exact capacity when defining the medium (in units of 4 KB pages). However, more and more tape device drivers can be relied on when they inform about the end of tape. When this is true, CONTROL acts in the described manner even for a "media size = 0". If the end of tape is not recognized correctly, the "writing error" message is displayed. In this case, too, you can continue as described.
The Ignore button is meaningless in this case.
As long as the backup is being performed, no other backup can be started. Only after confirming the result protocol, you can start another backup.