The Gold Key lets you upgrade your with new premium features. Newer controller models with the Gold Key require that you activate the Gold Key before you activate particular premium features.
When you enable the Gold Key, you can activate these premium features:
Gold Key compatibility of the controller model that you are using determines whether all of the premium features can be enabled. If you have a Gold Key-compatible controller model, you must purchase the Gold Key to activate more than 16 storage partitions, Enhanced Remote Mirroring, VolumeCopy, and mixed disk drive types (if your storage subsystem is subject to the Mixed Disk Drive Types key).
Controller models without Gold Key permit these premium features to be activated independently. For more information, contact a representative.