You can use the CLI command, zmbackupabort to stop a backup that is in progress. The backup is immediately stopped and becomes a partially successful backup.
But before you can abort a backup, you must know the backup session label. This label is displayed when zmbackup first starts. If you do not know the full backup label, use zmbackupquery to find the label.
1. Stop the backup, if you know the label name
zmbackupabort -lb full-20070712.155951.123 -s server1
2. Stop the backup, if you do not know the label
Run this command to get the backup session label.
After you get the backup session label, you just need to stop the process.
zmbackupabort -s server1 -lb full-20070712.155951.123