How can I tell if I have the correct iLok for my HD system?
The iLok that ships with Pro Tools|HD systems can be identified by the PID number on the backside of the iLok (PID 0-0966-600).
Newer HD systems may ship with iLoks that do not contain PID numbers. These can be identified by the last four digits of the second line on the backside label. If they read 9966 it is an HD iLok.