When DFSMShsm initially allocates a dump volume for output during a volume dump operation, it generates a unique data set name and supplies this name on the dynamic allocation request. (If dump copies are being stacked on a dump volume, each dump copy is in its own file and has its own unique data set name. For each dump copy, DFSMShsm stores the file sequence number and beginning file block ID in the BCDS records for use during restore.) Because DFSMSdss writes a full-volume dump copy as one data set, this data set name is the same for all tape volumes that are a part of the same dump copy. This name is supplied by DFSMShsm on the dynamic allocation of a dump copy during a restore operation.
prefix.DMP.dclass.Vvolser.Dyyddd.TssmmhhFor more information about how the DFSMShsm unique data set name is used, see Determining the dump copy data set name.