Shared device definition

Ensure that the device is defined for sharing before adding a Communications Data Set (COMMDS) for multi-system sessions; otherwise, TDMF initialization fails as indicated by message GTD1386I.

TDMF periodically places a hardware reserve on the volume that contains the Communications Data Set (COMMDS). If the COMMDS for a multi-system session is not placed on a device that is defined as shared, TDMF sends message GTD1386I and initialization fails.

For more information, see Planning and Coexistance with EMC’s z/OS migrator