See page 60 of the O/S Compatibility Matrix for the File System Compatibilty chart:
NetBackup (tm) 6.x Operating System Compatibility List (Updated June 30 2009)
http://support.veritas.com/docs/325328
OpenAFS 1.4.x is only listed under Solaris 8 SPARC, sorry to say.
(That doesn't mean it won't WORK....it just means we're not officially supporting it right now.)