Use the SETPARAM initialization statement to specify parameters that the JES3 main device scheduler (MDS) and the DYNAL DSP uses in allocation, mounting, and deallocation of devices for jobs run on all mains. The SETNAME and DEVICE statements are used with the SETPARAM statements. SETNAME and DEVICE identify the devices to be managed by MDS. SETPARAM also indicates how MDS is to manage devices.