ZPOOL_PROP_FAILUREMODE
zprop_register_index(ZPOOL_PROP_FAILUREMODE, "failmode",
spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
case ZPOOL_PROP_FAILUREMODE:
case ZPOOL_PROP_FAILUREMODE: