Masters are Solaris 9, NB5.1MP4

If master servers are clustered with Veritas cluster, how does NetBackup deal 
with shared tape drives that both masters connect to?

Do we have to get SSO licenses so they can share the drives?  

Is there a cluster aware add on that I will have to get?

Please don't give your opinion, I am seeking info from folks that are using 
clustered Sun masters.  (not meaning to be rude, but to many erroneous opions 
can be harmful.)

Thanks.

Bobby