While this doesn't *exactly* fit your scenario, I ran into this same 
problem several weeks ago, and was able to use the following Support doc 
to troubleshoot the issue:
http://seer.entsupport.symantec.com/docs/283322.htm

Basically, it walks you through the process of using nbrutil to determine 
whether a given piece of media is already allocated for something else, 
and shows how to release it.

HTH,
jcs

On Fri, 4 Jun 2010, Victor Engle wrote:

> List,
>
> This is probably a simple question but here goes...
>
> I start a restore the the restore just waits for media with the
> following message in the job details tab...
>
> 06/04/2010 12:12:58 - awaiting resource MXX010. Waiting for resources.
>          Reason: Media is in use, Media server: N/A,
>          Robot Type(Number): NONE(0), Media ID: MXX010, Drive Name: N/A,
>          Volume Pool: N/A, Storage Unit: N/A, Drive Scan Host: N/A,
>          Disk Pool: N/A, Disk Volume: N/A
>
> Netbackup show the media sitting in a slot in the library and the
> library web interface confirms the media's presence. The media is not
> in a tape drive being used. Why does netbackup indicate that the media
> is in use? How can I troubleshoot this?
>
> Thanks for any pointers!
> Vic
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