> I was going through logs and noticed I had a freeze incident where
> the label didn't match the barcode (oops!).  Sure enough I checked
> the tape and I've got 25 on the barcode and 27 on the label...
> 
> Before getting much farther, I'd like to do a (quick?) check 
> of all the
> volumes in library and check the RVSN against the barcode to see if
> there are other problems that haven't been detected yet.  Is there a
> command to query the RVSN?  I can mount the tape and wait for it to
> appear in 'vmoprcmd' or read it directly with 'dd', but I 
> figure there's
> a NB command to return it directly.

Check out vmphyinv; I've used it to inventory large numbers of unknown
tapes.  Physically mounts and reads the tape, reporting on external and
internal labels, plus the type of info found (NetBackup data, NetBackup
catalog, other...).  Lots of options.  Lots.