Linux manage all file-systems as a single large tree. This is different from DOS which manage all hard drives and network volumes as a set of independent unit (C: D: E:).
The first partition accessed by Linux is called the root.
The top-level directory is called /
. The other
partitions (and network volumes) may be installed anywhere
in the file-system tree.
For example, you can setup your Linux system like this.
These directories are called "mount points". They are initially empty. Linux will logically install the different partitions and volumes right there.
All of this to tell you that you have to tell which partitions/volumes go where.