DFSMSdss

DFSMSdss provides the following functions:

Data movement and replication: DFSMSdss lets you move or copy data between volumes of like and unlike device types. If you create a backup in DFSMSdss, you can copy a backup copy of data. DFSMSdss also can produce multiple backup copies during a dump operation.
Space management: DFSMSdss can reduce or eliminate DASD free-space fragmentation.
Data backup and recovery: DFSMSdss provides you with host system backup and recovery functions at both the data set and volume levels. It also includes a stand-alone restore program that you can run without a host operating system.
Data set and volume conversion: DFSMSdss can convert your data sets and volumes to system-managed storage. It can also return your data to a non-system-managed state as part of a recovery procedure.

Related reading: For more information on each of the DFSMSdss functions, see Understanding DFSMSdss.