Logical processing

A logical copy, dump, or restore operation treats each data set and its associated information as a logical entity, and processes an entire data set before beginning the next one.

Each data set is moved by tracks from the source device and is potentially written to the target device as a set of data records, allowing data movement between devices with different track and cylinder configurations. Checking of data record consistency is not performed during dump operations.

DFSMSdss performs logical processing if:

You specify the DATASET keyword with the COPY command. A data set copy is always a logical operation, regardless of how or whether you specify input volumes.
You specify the DATASET keyword with the DUMP command, and either no input volume is specified, or LOGINDDNAME, LOGINDYNAM, or STORGRP is used to specify input volumes.
The RESTORE command is performed, and the input volume was created by a logical dump.

DFSMSdss uses catalogs or VTOCs to select data sets for logical processing. If you do not specify input volumes, DFSMSdss uses the catalogs to select data sets for copy and dump operations. If you specify input volumes using the LOGINDDNAME, LOGINDYNAM, or STORGRP keywords on the COPY or DUMP command, DFSMSdss uses VTOCs to select data sets for processing.

Note: To copy or dump entire multivolume data sets, you do not need to specify all the volumes in the LOGINDDNAME or LOGINDYNAM volume list. However, you must specify the SELECTMULTI keyword with either the FIRST or ANY subkeywords.