Understanding the Basic Components › Tape Mount Interception › Unit Affinity and GDG Base Referral Processing

Unit Affinity and GDG Base Referral Processing

Unit Affinity and GDG base referral processing are supported.

If unit affinity, explicitly coded or implied, mixes CA Vtape Virtual Devices and non-CA Vtape devices, the affinity is broken but maintained within the device type. For example, if a GDG has generations on 3490E physical tape and generations on Virtual Volumes, one physical drive and one Virtual Device are required to read all generations with a GDG base referral.