The restore function begins by reading in all of the restore commands and sequencing them by file number within each archive tape (or archive data set on disk), the optimum performance arrangement. All data sets being restored from the archives on disk are done before those archived to tape. Two different variations of the restore function are available. The first form instructs CA Disk to go immediately to the index of archived data sets, find the named data set and proceed with the restore. The second form instructs CA Disk to begin by doing a catalog locate for the named data set. If the data set is cataloged to the CA Disk pseudo-volume (default is ARCIVE), the same process as for the first form is continued. Otherwise a return code is set and the next restore request is processed. Coding the SYSCTLG parameter on the command statement indicates this second form of the RESTORE command. The forms can be intermixed in the request stream.
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