Hello Christoph,
>> - pg_log(PG_PROGRESS, "syncing target data directory\n");
>> - syncTargetDirectory();
>
> Doesn't the control file still need syncing?
Indeed it does, and it is done in update_controlfile if the last argument
is true. Basically update_controlfile latest version always fsync the
control file, unless explicitely told not to do so. The options to do that
are really there only to speed up non regression tests.
--
Fabien.