Using the Basic Components › Using Existing Tape Data Sets › Unit Affinity and GDG Base Referral Processing

Unit Affinity and GDG Base Referral Processing

Unit Affinity and GDG base referral processing are supported.

In situations where 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 some generations on 3490E physical tape and some generations on Virtual Volumes, one physical drive and one Virtual Device will be required to read all generations with a GDG base referral.