As i wrote read help del vol first! There is the move described 

-----Ursprüngliche Nachricht-----
Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im Auftrag 
von Richard Sims
Gesendet: Donnerstag, 18. August 2005 15:16
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: How to delete copystg data for a single node?

On Aug 18, 2005, at 8:51 AM, Barnes, Kenny wrote:

> Wouldn't "Del vol discard=yes" delete all data for all nodes found on 
> the volume?  Would work if you were using collocation.

Quite so. Here are my notes on an approach, culled from prior postings:

Copy Storage Pool, delete node data     You cannot directly delete a
node's data
                                         from a copy storage pool; but you can
                                         circuitously effect it by using MOVe
                                         NODEdata to shift the node's data to
                                         separate tapes in the copy stgpool
                                         (temporarily changing the stgpool to
                                         COLlocate=Yes), and then doing DELete
                                         Volume on the newly written volumes.

   Richard Sims