If the data set being moved is to be non-SMS-managed, use the NULLSTORCLAS and BYPASSACS keywords on the COPY command. By using these keywords, you can copy an SMS-managed data set into a non-SMS-managed data set. Using NULLSTORCLAS and BYPASSACS also prevents a non-SMS-managed data set from becoming SMS-managed. When copying a VSAM data set to a non-SMS-managed volume, ensure that a VVDS exists on the volume prior to running the job, to prevent potential allocation errors because of insufficient space. DFSMSdss assumes a VVDS exists on the volume when doing size calculations on non-SMS-managed volumes.