mc_valid         1600 dev/isa/mcd.c  		data.what.media_catalog.mc_valid = 1;
mc_valid           66 sys/cdio.h     	u_int	mc_valid:1;
mc_valid           69 sys/cdio.h     	u_int	mc_valid:1;
mc_valid          107 sys/cdio.h     	u_int	mc_valid:1;
mc_valid          110 sys/cdio.h     	u_int	mc_valid:1;