Shelf locations in the removable media library are called rack numbers. Shelf locations in storage locations are called bin numbers. To define shelf locations to DFSMSrmm, use RMM ADDRACK or ADDBIN subcommands or the DFSMSrmm ISPF dialog.

You can optionally define a rack number for every volume that you plan to define to DFSMSrmm. You do not have to define all possible shelf locations now because you can add them at any time. If you want to logically divide the library into pools, see Organizing the library by pools.

If volumes are designated for use in an automated tape library, you must define rack numbers for the volumes when the external and internal volume serial numbers are not the same.

You can optionally define a bin number for every shelf location in a storage location. For shelf locations in DFSMSrmm built-in storage locations, LOCAL, DISTANT, and REMOTE, you provide an initial count and DFSMSrmm assigns the bin numbers.

You can use the LOCDEF command in the EDGRMMxx member of parmlib to define additional locations to DFSMSrmm and to further define existing locations. See Defining storage locations: LOCDEF and Managing storage locations for additional information. For shelf locations in installation defined storage locations, provide a count and an initial bin number.