无法创建新的表空间

Question

我正在尝试创建一个新的表空间：

>CREATE TABLESPACE db2 LOCATION '/mnt/database2/db2';
>ERROR:  directory "/mnt/database2/db2" does not exist

但目录存在：

>[ -d '/mnt/database2/db2' ]&& echo ¨exists¨||echo ¨not exists¨  
>¨exists¨

有什么不对？

UPD：

# \! ls /mnt/database2/db2
# \! ls /mnt/database2/db3
ls: cannot access /mnt/database2/db3: No such file or directory
#  CREATE TABLESPACE db2 LOCATION '/mnt/database2/db2';
ERROR:  directory "/mnt/database2/db2" does not exist
#  CREATE TABLESPACE db2 LOCATION '/mnt/database2/db3';
ERROR:  directory "/mnt/database2/db3" does not exist