There is a program on the CBTtape file 183 called UNITAFF, which executes as a step just before the step that uses all of the tapes. That program scans the SWA for the next step and changes some of the SIOT's fields (the tape ones) to force all input tape data sets to the same drive.
I use this on any job that does things like concatenate all of the GDG's by just specifying the base GDG, and I also put it in production jobs that try to use a jillion tapes at the same time. It needs to be authorized, but it's dummy proof because there are no parms. you just add a step //UNITAFF EXEC PGM=UNITAFF before any step you want to affect by the utility. It's much easier than trying to go in and edit/change a huge amount of JCL, and the great part is that the only JCL change is to add that one card before the problem step in question. I have used it for many years and it has never failed me yet. In fact, it's gets used daily at at least 6 dozen shops that I have worked with. Brian Westerman ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
