Here's the documentation information that I was referring to in my previous post -
===========
Through the Configure Automatic Maintenance wizard in the Control Center or Health Center, you can configure:
The requested time or number of log pages between backups
The backup media 7 Whether it will be an online or offline backup.
If backup to disk is selected, the automatic backup feature will regularly delete backup images from the directory specified in the Configure Automatic Maintenance wizard. Only the most recent backup image is guaranteed to be available at any given time. It is recommended that this directory be kept exclusively for the automatic backup feature and not be used to store other backup images.
The automatic database backup feature can be enabled or disabled by using the auto_db_backup and auto_maint database configuration parameters. In a multiple database partitioned environment, the automatic database backup runs on each partition if the database configuration parameters are enabled on that partition.
==============