1.1 - File Systems

Introduction to File Systems

• Definition of a file system: A file system is the structure used for organizing and storing data on a storage device.

• Importance of file systems: The file system determines how data is read and written by the operating system, making it a fundamental component when installing an operating system.

Creating a Partition

• Steps in installing an operating system start with creating a partition.

  • A partition is a section of a storage device designated for a particular filesystem.

  • Formatting is required before data can be stored in that partition.

  • Formatting determines the file system utilized for that partition.

File Systems Overview

• Different operating systems employ various file systems.

• Some file systems are cross-compatible across multiple operating systems.

  • Example file systems compatible across Windows, Linux, and macOS include:

  • FAT32

  • NTFS

  • exFAT

NTFS (New Technology File System)

• NTFS is predominantly used in Windows operating systems as an upgrade to FAT32.

• Features of NTFS include:

  • Compression: Reduces the size of files and folders to save space.

  • File Encryption: Protects files by encrypting them.

  • Quotas: Allows administrators to control disk space utilization by users.

  • Other management features: Advanced features for file management to enhance performance.

• Compatibility with other operating systems:

  • Many other OSs can read NTFS information;

  • Modern versions of Linux and macOS can read and write NTFS data.

ReFS (Resilient File System)

• ReFS is being developed as the successor to NTFS by Microsoft.

  • Early integration seen in Windows Server 2012 and later versions.

• Key characteristics of ReFS:

  • Designed for both desktop and server environments.

  • Capable of handling large data arrays, supporting significant data volumes in single partitions.

  • Emphasis on data integrity, with self-repair capabilities.

  • Constantly checks its integrity without needing to run utilities like Check Disk.

  • Built-in RAID functionalities to create redundant file systems.

• Current status:

  • Adoption is limited; Microsoft continues to update and improve ReFS.

FAT32 (File Allocation Table 32)

• FAT32 is a widely recognized file system that has been around for many years.

• Specifications of FAT32 include:

  • Maximum volume size: 2 terabytes

  • Maximum file size: 4 gigabytes

• Limitations:

  • As storage technology advances, systems larger than 2 terabytes necessitate alternative file systems.

exFAT (Extended File Allocation Table)

• exFAT was created by Microsoft, specifically for flash drive storage solutions.

• Advantages of exFAT:

  • Allows file sizes larger than 4 gigabytes, unlike FAT32.

  • Facilitates cross-platform use, enabling file transfer between Windows and other OSs (Linux, macOS) via flash drives.

ext4 (Fourth Extended File System)

• ext4 is an advanced file system version commonly found in Linux and Android operating systems.

• Operating context:

  • Frequently used in Android portable devices and Linux data centers.

XFS (Extended File System)

• XFS is designed for high-performance scenarios, primarily in Linux environments.

• Characteristics of XFS:

  • Supports efficient storage of very large data sets, performed by massive data operations with high-speed processing needs.

  • Journaling capabilities minimize data corruption risks during read/write interruptions.

  • Low fragmentation rates enhance performance on traditional spinning hard drives.

APFS (Apple File System)

• APFS, introduced in macOS version 10.12.4, is tailored for SSDs and used across Apple's ecosystem, including iOS and iPadOS.

• Features of APFS:

  • Optimizes storage management on SSDs.

  • Built-in encryption for enhanced security.

  • Quick snapshot capabilities for efficient backups and restores.

  • Increased options for data integrity management.