COPY IMAGECOPY automatically performs stacked tape analysis to determine the optimal order in which to process the input tape if dynamic allocation is used.
Tape analysis can be important when COPY TABLESPACE or COPY INDEXSPACE uses multitasking with wildcards to make image copies to stacked tape. COPY IMAGECOPY tape analysis improves the performance of processing these copies by determining the proper order and eliminating tape rewinding, multiple tape mounts, or both.