What are Different Types of Document Holders?

File directory refers to: in order to achieve "access by name", the correspondence between the file name and the physical address in the auxiliary storage space must be established. The data structure that reflects this correspondence is called a file directory.

File Directory

Each file is registered in the file directory as a list of files created and maintained by the file system.

There are thousands of files in a computer system. In order to facilitate the access and management of files, the computer system establishes an index of the file, that is, the mapping relationship between the file name and the physical location of the file. .

The file directory establishes an entry for each file. The file directory entry must contain at least the file name, the internal identification of the file, the type of the file, the file storage address, the length of the file, access rights, establishment time, and access time.

File directories (or folders) are made up of file directory entries. The file directory is divided into a first-level directory, a second-level directory, and a multi-level directory. The multi-level directory structure is also called a tree structure. In a multi-level directory structure, each disk has a root directory. The root directory can contain several subdirectories and files. In the subdirectories, not only files but also files can be included. Contains the next level of subdirectories, and so on to form a multilevel directory structure.

The advantage of using a multi-level directory structure is that users can store files of different types and functions in different categories, which is convenient for file management and search, and allows files in different file directories to have the same file name. Duplicate problem. Windows, UNIX, Linux, and DOS operating systems use a multi-level directory structure. ^[1]