2.1.3 Identify the primary functions performed by the file system.

2.1.3 Identify the primary functions performed by the file system

File System

• File systems specify conventions for naming files, including the maximum number of characters in a name, which characters can be used and, in some systems, how long the file name suffix can be.
• A file system also includes a format for specifying the path to a file through the structure of directories.
• For example, DOS, Windows, OS/2, Macintosh and Unix-based operating systems (OSes) all have file systems in which files are placed somewhere in a hierarchical (tree) structure. 
• A file is placed in a directory (folder in Windows) or sub directory at the desired place in the tree structure.
• The file system provides file management, a standard interface to: 

1. Create and delete files and directories
2. Manipulate (read, write, extend, rename, copy, protect) files and directories. map files onto secondary storage.
3. provides general services such as backups, maintaining mapping information, accounting and quotas