Understanding UNIX / Linux filesystem Superblock

by nixcraft

This is second part of "Understanding UNIX/Linux file system", part I is here. Let us take an example of 20 GB hard disk. The entire disk space subdivided into multiple file system blocks. And blocks used for what?

Unix / Linux filesystem blocks

The blocks used for two different purpose:

1. Most blocks stores user data aka files (user data).
2. Some blocks in every file system store the file system's metadata. So what the hell is a metadata? <……