z/OS DFSMSdss Storage Administration
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Defining logical and physical processing

z/OS DFSMSdss Storage Administration
SC23-6868-01

DFSMSdss can perform two kinds of processing when executing COPY, DUMP, and RESTORE commands:
  • Logical processing operates against data sets independently of physical device format.
  • Physical processing moves data at the track-image level and operates against volumes, tracks, and data sets.

    Each type of processing offers different capabilities and advantages.

During a restore operation, the data is processed the same way it is dumped because physical and logical dump tapes have different formats. If a data set is dumped logically, it is restored logically; if it is dumped physically, it is restored physically. A data set restore operation from a full-volume dump is a physical data set restore operation.

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