To enable extended bin support, create or update the control data set control record using the EDGUTIL utility with the EXTENDEDBIN(YES) option. See Creating or updating the control data set control record for a detailed description of the EXTENDEDBIN parameter.

When extended bin support is enabled, DFSMSrmm records additional volume information and bin information to keep track of the volume's location when a volume is moving from a bin-managed storage location or to a bin-managed storage location.

DFSMSrmm keeps track of this information for a volume: Destination bin number, Destination bin media name for a volume, current bin number, current bin media name, Old bin number, and Old bin media name When a volume starts moving to a bin-managed storage location, DFSMSrmm updates the destination bin fields with the bin number and the bin media name. When the move has been confirmed, DFSMSrmm updates the current bin fields with the destination bin fields.

If a volume moves from a bin-managed storage location, DFSMSrmm does not change the current bin fields until the move has been confirmed. DFSMSrmm changes the old bin number to the current bin number and clears the current bin number when a move is confirmed. When extended bin support is not enabled and a volume is moving, DFSMSrmm shows the source bin in the old bin fields and the target bin in the current bin fields.

DFSMSrmm keeps track of additional volume information in the bin record when extended bin support is enabled: Moving-in volume, Moving-out volume, and Old volume. When extended bin support is enabled, a volume, for which a move to the bin has been started, is shown as the 'moving-in volume' in the bin record. When the volume move is confirmed, the volume is shown as the current volume in the bin record. A volume, for which a move from the bin has been started, is shown as the 'moving-out volume' in the bin record. When the volume move out of the bin is confirmed, the volume is shown as the 'old volume'. When extended bin support is not enabled, DFSMSrmm shows a volume as the 'current volume' in the bin record from the time the move to the bin has been started until the time that the move from this bin has been confirmed.

Before you enable extended bin support, perform these steps:

1. Complete all outstanding volume moves from and to bin-managed storage locations.
2. Run inventory management vital record processing or inventory management expiration processing to complete the confirmation of the volume moves.
3. Review user-written programs, REXX EXECs, and reports that contain information about bins. You might need to modify the programs and reports to incorporate information provided with extended bin support. In an RMMplex, your system-managed libraries must be connected to at least one system which either runs z/OS Version 1 Release 3 or higher or has APAR OW49863 installed.