ORA-19585: premature end of volume on piece string
Cause: While creating the indicated backup piece, an end-of-volume condition was encountered before all of the backup set control data was written to the backup piece. This is most likely a media error, because the amount of backup set control data is very small in relation to the total amount of data in a backup set
Action: Retry the piece with a larger piece of output media
https://support.oracle.com/
http://www.oracle.com/