do_create_ctd
static int do_create_ctd(char *raid_levelp, char **disks_argpp,
ret = do_create_ctd(r_argp, argv, argc - 4,
ret = do_create_ctd(NULL, argv, argc - 2,
ret = do_create_ctd(r_argp, argv, argc - 5,
ret = do_create_ctd(NULL, argv, argc - 3,