dasd_alias_get_start_dev
startdev = dasd_alias_get_start_dev(base);
startdev = dasd_alias_get_start_dev(base);
startdev = dasd_alias_get_start_dev(base);
startdev = dasd_alias_get_start_dev(base);
struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);