Bill, Thanks for info. Just curious, are you utilizing source-side dedupe or relying on the TSM identify to identify all your duplicates (post-process)? How does the maxsize parameter interact with source-side dedup? I'll have to look that up.
Eventually you have to reclaim your copy pools and based on your hierarchies, it looks like reclamation would be feeding off from the large 4TB drives. Have you had issues reclaiming from those pools? Thanks! Sergio