1. In a system having a DASD storage subsystem and a CPU coupling said DASD subsystem, said system utilizing selectively invocable nested storage access methods, said methods including a storage device level access method (ISAM) nested within a virtual storage access method (VSAM), said VSAM creating, modifying, or deleting data sets including records, catalogs, and indices, said data sets being accessed by VSAM only at a partial DASD tract-at-a-time-per-access basis, the recreation of any data set of related records, catalog entries, or indices from within VSAM including the steps of copying the records from a first to a second DASD location, and rebuilding the catalog entries and indices, a computer-implemented method for moving a data set of related records, catalogs, and indices from a first to a second DASD location from without VSAM, comprising the steps of: (a) creating a newly-defined catalog record and allocating space for a data set on the second DASD location; (b) invoking the device level access method by the CPU independently of VSAM; and (c) causing the invoked device level access method to execute the steps of: (1) moving the data set resident at the first DASD location onto the second DASD location a full track at a time, preserving thereby all relative byte addressing of data set constituitive elements; (2) defining the indices, if any, on the second DASD location and connecting them to the moved catalog; (3) deleting the data set including catalogs and indices resident at the first DASD location; and (4) renaming the newly-defined catalog record to the original name.