If the volume allocation is done using a stand-alone tape drive and no OAM scratch tape is available, OAM allocates a scratch tape using the TAPEUNITNAME parameter that is specified in the subparameter of the STORAGEGROUP parameter on the SETOAM statement. If no TAPEUNITNAME parameter is associated with the Object storage group that is assigned to the object, the storage of the object fails. The TAPEUNITNAME is stored in the UNITNAME column of the TAPEVOL table. The TAPEVOL table contains a single row for each tape volume containing OAM objects.
Requirement: The TAPEUNITNAME parameter is required and is specified on all dynamic allocations so that the device which is allocated is compatible with the tape to be mounted.