course 1: File System FS in Win

File System in Win
In a computer, a file system (sometimes written filesystem) FS is the way in which files are named and where they are placed logically for storage and retrieval, FS allows users and programs to organize and sorts files on a computer, often through the use of directories (or "folders"). Access to data stored on disks is a central feature of all operating systems. Computers store data on disks using files, which are structured in specific ways in order to allow for faster access, higher reliability, and to make better use out of the drive s available space. The specific way in which files are stored on a disk is called a file system, it enables files to have names and attributes. It also allows them to be stored in a hierarchy of directories or folders arranged in a directory tree.
We can summarize the basic features of File System (FS) as:
? A file system is an abstraction to store, retrieve and update a set of files. The term also identifies the data structures specified by some of those abstractions, which are designed to organize multiple files as a single stream of bytes. responsible for organizing files and directories, and keeping track of which areas of the media belong to which file and which are not being used.
? The file system manages access to the data of the files, and manages the available space of the device(s) which contain it.
? File system is a system for organizing data in an efficient manner, directories and files, generally in terms of how it is implemented in the disk operating system, collection of files and directories stored on a given drive (floppy drive, hard drive, RAM drive, etc.).
? File systems allocate space, multiple physical units on the device.
? A file system can be thought of as an index or database containing the physical location of every piece of data on a hard drive. A file system is setup on a drive during a format.