> In your support session with HP did you check to see if the tape 
> drives themselves were the source of the problem?  In my experience 
> tapes being prematurely marked full are usually because the drive is
> getting worn out and throwing too many errors.

I have a NW server with an HP LTO-3 autochanger. If I leave the HP Insight 
services running, the tapes get marked full after only a few gig. This is 
not just the removable services service; this is any of the Insight 
services.