What is IEBCOPY.
IEBCOPY is a utility program in the IBM z/OS operating system that is used to copy data from one data set to another. It is particularly useful when you want to copy data sets with large block sizes, or when you want to copy data sets with different organization, record format, or block size. IEBCOPY can also be used to copy data between data sets with different data formats, such as ASCII and EBCDIC. It can also be used to reformat data while it is being copied, by using the “INDDN” (input data definition name) and “OUTDDN” (output data definition name) parameters to specify different data definitions for the input and output data sets.