Operation Systems Chapter 8, File Management

1.controls every file in the system 2. processes user commands to interact with the files 3.manages access control procedures to maintain security of the files.

1. Keep track of where files are stored 2. Use policies to determine where and how files are best stored 3. Allocates files 4. Deallocates files and tells the system the file is available.

Files are kept in directories that contain the file name, its location in secondary storage, and other important details

1. Where files are stored and how they can be accessed 2.who has access to what material

1. Allows access to shared files 2. Provides Distributed Access 3. Allows users to browse public directories

1. Activates the correct sencondary storage device 2. Loads it into memory 3. Tells the system that the file is in use

1. Updates the file tables and revises if needed, and tells the system the file is free

A group of related bytes that can be identified by name,type, and size.

A group of related feilds

A group of related records that hold data to be used by programs to generate reports

Has no connections to other files, and has no dimensions

Program files contain instructions, Data files contain data. *The file manager treats them the same way.

A group of related files that are interconnected at different levels to give users flexibility of access.

Special files with listings of file names and their attributes

All programs and Data all computer software