I am working with my DBA and Symantec, opened a ticket and found this issue 
from the RMAN side:

Here is my note to them:
Please review case # 291-053-107.
Our Oracle DBA are extremely upset that the tools available to them to 
troubleshoot in a DR situation are so poor.
They have no reliable way to determine something as simple as which media to 
request.
* The Oracle RMAN utility, referencing the control files or RMAN catalog 
database, knows what backupsets are needed for a restore.
* Only RMAN knows what backup pieces are needed for a restore.
* While there is an RMAN command that will list the images that a particular 
backupset resides on, but this list is incomplete if an image spans several 
media.

NOTE THIS PART! but this list is incomplete if an image spans several media.

Here is Symantec response:
I consulted with my seniors and my peers who work with NOM, and unfortunately 
we do not have a report that can show us the backupset mapping with the media 
id.  So we'll have to follow the same procedure to know the media-ids:
 
Oracle DBA tells you the data range information, client name from the backupset 
query. 
You can run bpimagelist and bpimmedia commands to know the medias required for 
recovery of that backupset.


>Message: 7
>Date: Wed, 19 May 2010 15:04:54 +0200
>From: Michael Graff Andersen <mian71 AT gmail DOT com>
>Subject: Re: [Veritas-bu] RMAN crosscheck
>To: "Lightner, Jeff" <jlightner AT water DOT com>
>Cc: veritas-bu AT mailman.eng.auburn DOT edu,  Kevin Corley
>       <Kevin.Corley AT apollogrp DOT edu>
>Message-ID:
>       <AANLkTikyYlBqQBQAkuc6433Zt-LTm6hwqIxc8bWVhPm1 AT mail.gmail DOT com>
>Content-Type: text/plain; charset="windows-1252"
>
>Think there is, at least according to this page
>http://ss64.com/ora/rman_crosscheck.html
>
>Regards
>Michael

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