Mark,

This is from the TDP for Oracle manual!

RMAN generates unique backup file names. Because all backup objects inserted
into the TSM backup storage pool have unique file names, they never expire
on the TSM server. As a result, TDP for Oracle requires these special TSM
policy domain settings:

Backup Copy Group Values TDP for Oracle provides a delete function to remove
unwanted backup objects from the TSM server. However, for the delete
function to work, the following backup copy group parameters must be set:

6VERDELETED=0
6RETONLY=0

Then, when TDP for Oracle marks a backup object inactive, that object is
deleted from the TSM server the next time expiration processing occurs. A
backup object is marked
inactive when you delete it through the TDP for Oracle interface.

Notes:
1. The TSM administrator must also register your node by specifying
BACKDELETE=YES in order for backup objects to be deleted.

Regards,

Demetrius Malbrough
UNIX/TSM Administrator