Yes, the issue with initdb failing is unrelated (and I have no problem
about the fs being unsupported). But fsync still DOES fail on
directories from the mount.
>> But I would not be that sure that eg. NFS or something like that won`t
>> complain.
> It does not.
>
What if someone mounts a NFS share from a system that does not support
directory fsync (per buildfarm: unixware, AIX) on Linux? I agree that
this is asking for trouble, but...
Greetings
Marcin Mańk