Please remember that the performance of 3590's with multiple datasets per cartridge had a problem. IBM fixed the problem but customers had to replace old 3590-A01 and A50 control units and upgrade existing 3590-A60's to get the new ucode. The fix was to add a deferred conditional tape mark ccw and other magic. Before the fix, stacking many small files to a 3590 was slower than using 3480's or 3490's. See IBM's annoucement letter 101-291 from Oct. 2001 for details from the wayback machine.
Ben Alford Enterprise Systems Programming University of Tennessee ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
