A drive control module of a solid-state drive includes a first module that receives host commands from one of a host command buffer and a drive interface of the SSD, converts the host commands to stage commands, and determines whether to store the stage commands in a stage slot of a staging memory or leave the stage slot empty. In one embodiment, the apparatus can include a conditioning body having a conditioning surface that engages a planarizing surface of the planarizing medium and is movable relative to the planarizing medium. The rotor has an upper end and a lower end, with the upper end extending into the interior cavity. During heat treatment, the protective layer prevents the DLC inclusive layer from significantly burning off. The pitch of the regions where first face of the waveguide is not totally internally reflective is substantially an integer multiple of the pitch of the pixels of the spatial light modulator. This assembly accurately supports the structure and prevents rotation of the mount assembly.