Page 58 - DCAP602_NETWORK_OPERATING_SYSTEMS_I

Network Operating Systems-I Mithilesh Kumar Dubey, Lovely Professional University

notes unit 3: file system Hierarchy

contents
Objectives
Introduction
3.1 File Systems
3.1.1 Types of File Systems
3.1.2 File Systems and Operating Systems
3.2 File Concept
3.3 Access Methods
3.3.1 Sequential Access
3.3.2 Direct Access
3.3.3 Other Access Methods
3.4 Directory Structure
3.5 File System Structure
3.6 Summary
3.7 Keywords
3.8 Self Assessment
3.9 Review Questions
3.10 Further Readings

objectives

After studying this unit, you will be able to:
l z Discuss File Systems

l z Understand File Concept
l z Discuss Access Methods
l z Understand Directory Structure
l z Understand File System Structure

introduction

Another part of the operating system is the file manager. While the memory manager is responsible
for the maintenance of primary memory, the file manager is responsible for the maintenance of
secondary storage (e.g., hard disks).
Each file is a named collection of data stored in a device. The file manager implements this
abstraction and provides directories for organizing files. It also provides a spectrum of commands
to read and write the contents of a file, to set the file read/write position, to set and use the
protection mechanism, to change the ownership, to list files in a directory, and to remove a file.
The file manager provides a protection mechanism to allow machine users to administer how

52 LoveLy professionaL university