dasd.bba7e6 <bus ID of the DASD>: The specified DASD is a partition and cannot be formatted
Explanation
The DASD you try to format is a partition. Partitions cannot be formatted
separately. You can only format a complete DASD including all its partitions.
User response
Format the complete DASD.
ATTENTION: Formatting irreversibly destroys all data on all partitions
of the DASD.