Bsc CSIT Semester 4 – Operating System – Unit 5: File Management (6 Hrs.)

File Allocation Table (FAT) in Operating Systems 1. How FAT Manages Files - Definition: FAT is a table-based file system used to track which disk blocks (clusters) belong to which files. - Structur

File, Directory, and Protection Mechanism 1. File - Definition: A file is a collection of related information or data stored on secondary storage (disk) under a name. - Key Points: - Can be tex

File Allocation Table (FAT) Management 1. Definition - FAT (File Allocation Table) is a table maintained by the operating system to keep track of all the blocks (clusters) allocated to files on disk.

Free Disk Space Management Free disk space management refers to the techniques used by the Operating System to keep track of unused disk blocks so that new files can be stored efficiently. The main

File Attributes - Definition: File attributes are metadata associated with a file that describe its properties, ownership, and access. - Common File Attributes: 1. Name: Unique identifier of

Managing Free Disk Space 1. Approaches to Manage Free Disk Space Operating systems need to keep track of free disk blocks for file allocation. Common approaches: 1. Bit Vector / Bit Map: - Each d

File Allocation Techniques Files can be stored on disk using different allocation methods: --- 1. Contiguous Allocation - File occupies continuous disk blocks. - Example: File F1 uses blocks 10, 11

Hierarchical Directory System and Disk Structure 1. Why We Need Hierarchical Directory System - Single-level directories have all files in one directory → difficult to manage as the number of files g

Short Notes a) Inode (Index Node) - Definition: An inode is a data structure in Unix/Linux file systems that stores metadata about a file. - Contents of an Inode: - File type (regular, direct

File Structures A file structure defines how data is organized and stored in a file for efficient access and management. 1. Sequential File Structure - Records are stored one after another in a sequ

1. Single-Level and Two-Level Directory Systems Single-Level Directory - Concept: - All files are stored in one directory per user or system. - Structure: - Directory contains file name → p

Linked List Allocation in File System Concept: - In linked list allocation, each file is a linked list of disk blocks. - Each block contains a pointer to the next block. - First block of the fil

File Allocation Techniques: Contiguous vs Linked List | Feature | Contiguous Allocation | Linked List Allocation | |---------|--------------------|----------------------| | Storage Layout | Each file