Using the EDG3UX62 USERMOD to create and mount no label tapes

Before you begin: Validate that the EDG3UX62 USERMOD does not conflict with any other modifications to the IATUX62 module.

Installing the EDG3UX62 USERMOD is optional. If you decide to install it, use SMP/E.

Install EDG3UX62 when you are using JES3 pre-execution setup for tape volumes.

After you implement EDG3UX62, you can accomplish these tasks:

Create NL tape volumes from scratch volumes.
Use duplicate volumes when using deferred tape mount processing.
Mount a volume with standard labels for a non-specific NL request.
Process any standard label volume when requesting a specific volume where the specific volume and the mounted volume have the same label type. For example, the user requests an AL tape volume and the operator mounts an AL tape volume.
Specify volumes with duplicate volume serial numbers.

The EDG3UX62 USERMOD updates IATUX62 to override the JES3 decision to reject a tape when a non-specific NL tape is requested and a standard label write-enabled tape is mounted. During JES3 verify processing, JES3 ensures that the mounted volume matches the requested volume. If an NL tape is requested, JES3 ensures that an NL tape is mounted. For specific volume requests this is correct processing, but for non-specific requests DFSMSrmm forces all scratch volumes to contain a standard volume label. As a result, JES3 rejects any scratch volume that is mounted.