The way that hard drives are handled in Linux can be a difficult concept to grasp for Windows users. In Windows, the hard drives are labelled "C:", "D:", etc., and each of them has its own directory tree. As you can see in the diagram at top right, there is absolutely no connection between these trees. On a Linux system, however, there is only one directory tree. Each hard drive is "mounted" on a particular directory in that tree. For example, the first hard drive is mounted on "/", the root of the tree. Everything contained on that drive has been colored yellow in the diagram at bottom right. The second drive is mounted on "/home". That means that any files or directories under "/home" in the tree will be stored on the second drive rather than on the first one. They are colored blue. Similarly, the third drive has been mounted on "/usr". Its contents have been colored green. Due to its single-tree approach, the Linux filesystem structure is much more flexible and usable than the Windows structure. This becomes especially evident with networked filesystems, although the details are beyond the scope of this course. Click the right arrow.