CAM_ARG_START_UNIT
error = scsistart(cam_dev, arglist & CAM_ARG_START_UNIT,
{"start", CAM_CMD_STARTSTOP, CAM_ARG_START_UNIT, NULL},
{"load", CAM_CMD_STARTSTOP, CAM_ARG_START_UNIT | CAM_ARG_EJECT, NULL},