I was thinking a ful recall would be the way. Unfortunatley I have archived 600GB and only have 400GB available on the LUN, so a full restore is tricky.
The other issue is we archive to an EMC Centera running in GE mode so I assume I need to make sure I can delete on recall, which means setting up Privilaged Delete rights correctly.
However, we may be able to stage this by recalling 1 AP at a time, ensure that the Centera pool has reduced in size to indicate our deletes are working, then remove the AP and the Archive, then re-archiving them under the new higer level AP.
It would be easier if I could just merge the Archives
I'll have to get Symantec Support to tell me more about this merge utility they have.