select object_id from backups where node_name=
backup_date < '2005-07-01 00:00:00'
This can be redirected to a file then used later to delete with an undocumented delete command. I will give the delete command out to those who need it, but remember any deletion from the TSM DB is done AT YOUR OWN RISK! It's unsupported because Tivoli doesn't trust you to not screw stuff up, and although I don't think you will, it's better safe then sorry.