What size information? Based on your other comments, it appears you want the allocated or used size, and not record size, block size, track size, primary allocation size, or secondary allocation size. Do you want this in bytes, tracks, cylinders, or something else? Do you need to do this programmatically, or could you use the Data Set List Utility of ISPF? If programmatically, does it have to be assembler, or would REXX suffice? Does the LISTDSI REXX function have the info you need?
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