What is this Concept

[ashlee]

What is meant by the concept of filesystem in a operating system? Someone kindly provide a detailed explanation on this.

[sammy]

Some early operating systems had a separate component for handling file systems which was called a disk operating system. UNIX and Unix-like operating systems assign a device name to each device. UNIX creates a virtual file system, which makes all the files on all the devices appear to exist under one hierarchy. This means, in UNIX, there is one root directory, and every file existing on the system is located under it somewhere.