BIOC_SDUNUSED
case BIOC_SDUNUSED:
if (bd.bd_status == BIOC_SDUNUSED) {
bd->bd_status = BIOC_SDUNUSED;
bd->bd_status = BIOC_SDUNUSED;
bd->bd_status = BIOC_SDUNUSED;
bd->bd_status = BIOC_SDUNUSED;
bd->bd_status = BIOC_SDUNUSED;