Use the EDG3UX29 USERMOD to prevent JES3 from validating volumes to avoid conflicts with DFSMSrmm validation.

In a JES3 system, the default value for EXPDTCHK is YES. This value can conflict with the tape management system function that allows you to use expiration date protected tapes. EDG3UX29 sets EXPDTCHK=NO.

In a JES3 system, the default value for RINGCHK is YES. This value can conflict with the tape management system function, DFSMSdfp, and RACF function that forces logical write protect or allows a user to open a tape data set for READ even though the tape is write enabled. EDG3UX29 sets RINGCHK=NO.