The routine mrd_request_sense(3mrd) never returns MRD_STATUS_ SUCCESS. If the os_status isn't the operating system specific code that forces a Reqeust Sense command or MRD_CHECK_SENSE, mrd_map_os_error(3mrd), is used to map the os_status to an MRD status code. Otherwise, a Request Sense (or equivalent) is performed and the result mapped to an MRD status code with mrd_ scsi_decode(3mrd).Additional Information: explode extract