When you specify the REASSIGN subparameter with the dump parameters, REASSIGN specifies that the contents of that volume are to be discarded. The volume is also made available and is associated with its original dump class. The original dump class is the class specified with the ADDVOL command. If no class is specified with ADDVOL, then there is no associated dump class after the DELVOL REASSIGN. DFSMShsm can reuse the reassigned volume without reinitialization. REASSIGN is applicable only for dump volumes.