Hi, On Sun, Jan 30, 2022 at 05:15:33AM +0700, Yudianto Prasetyo wrote: > > I'm confused when I have 2 HDD. HDD 1 is used to install the OS and > postgresql database. when HDD 1 is full. how to increase the capacity of > postgresql database with HDD 2 (without RAID system)? > > is there any other way like oracle DB's "add datafile" which can be used to > add capacity to another HDD? I don't know how those datafiles are working, but with postgres the solution is to create additional tablespaces pointing to the new drives, see https://www.postgresql.org/docs/current/sql-createtablespace.html. Note that a single non-partitioned table can only exist on a single tablespace, so if you have a gigantic table that's becoming bigger than you disk, the solution might be to partition it and store different partitions on different tablespaces.