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Volume and Data Set Records

Information about the physical characteristics of tape volumes listed in the TMC is stored in volume records. Volume records also contain information about the first (or primary) data set on the tape.

Information about second and subsequent data sets on a tape is stored in separate data set records or data set name blocks (DSNBs).

Volume Records and Data Set Records

Diagram explaining how Volume records contain information about the first (or primary) data set on the tape.