If $PGDATA is really a mountpoint for the filesystem, change it to become a directory from the mounted filesystem. For instance: if a filesystem is mounted to /var/lib/psql/knowledge and $PGDATA is ready to /var/lib/pgsql/data, adjust $PGDATA to /var/lib/pgsql/details/data. In fact, defending facts durability on more than one node by default https://pgauto22110.aboutyoublog.com/31766137/the-definitive-guide-to-pgauto