At the first IPL after the library is configured, media type defaults are no longer set for the cartridge loaders by the system, so they remain set to NONE.

Use the LIBRARY SETCL command to assign a media type to the tape library data server cartridge loaders. Once the LIBRARY SETCL command is used, the media type that is assigned to the cartridge loader is preserved. Subsequent IPLs will not modify the assignment. Use the LIBRARY DISPCL command to display the media type.