Controlling what DFSMSdss copies

DFSMSdss copies only used space for sequential or partitioned data sets and data sets with null DSORG fields (X'0000'), unless overridden by ALLDATA or ALLEXCP. Use the ALLDATA(*) and ALLEXCP keywords to process allocated space when the following conditions exist:

You are not sure of the data set organization (DSORG) of a data set on a volume when doing a full-volume copy operation.
There are sequential, partitioned, or individual data sets with a null DSORG field (X'0000') that is not accessed using SAM or PAM.

Note: The COPY command requires temporary work space. Ensure that public or storage volumes are available. Some temporary data sets are allocated to nonspecific devices by referring to SYSDA or SYSALLDA generic groups. If DFSMSdss is to function, these allocations must be allowed by the installation. Allocation validation exits must not restrict DFSMSdss allocations.

For temporary data sets allocated to nonspecific devices, DFSMSdss provides no unit type. SYSDA, SYSALLDA, or whatever is specified in the default allocation table is used. In an SMS-managed environment the default unit specified in the SMS base configuration table is taken even for non-SMS-managed temporary data sets.

See ACS routine information for information on automatic class selection (ACS) routines during DFSMSdss copy operations.