Postgres 9.3 - Problem to initialize folder as a data folder I have a problem when I want to initialize a folder as a data folder:

postgres@ccruzado-test01:~$ /usr/lib/postgresql/9.3/bin/initdb -D /datadrive/postgresql/
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.UTF-8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

creating directory /datadrive/postgresql ... ok
creating subdirectories ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
creating configuration files ... ok
creating template1 database in /datadrive/postgresql/base/1 ... LOG:  could not link file "pg_xlog/xlogtemp.1716" to "pg_xlog/000000010000000000000001" (initialization of log file): Operation not supported
FATAL:  could not open file "pg_xlog/000000010000000000000001": No such file or directory
child process exited with exit code 1
initdb: removing data directory "/datadrive/postgresql"


The directory /datadrive/postgresql/ is a drive mounted by CIFS in FSTAB

//prueba /datadrive cifs vers=2.1,credentials=/home/user/.smbcredentials,dir_mode=0777,file_mode=0777,nounix 0 0. 


The OS is Ubuntu 14.04
Creating the data directory on Linux includes creating hard links, which is not supported on CIFS shares. This is why the creation is failing.

It's usually not a good idea to create data stores / clusters on remote shares, it might lead to issues if the share disappears in the middle of using it.