Professor Messer Explores File Systems Used by Operating Systems

In this video, Professor Messer explores the file systems used by operating systems, emphasizing their importance and specific characteristics. He begins by explaining that when installing an operating system, the first step is to create a partition to store data. Before this partition can be used, it must be formatted, which determines the file system to be used. This file system is crucial as it defines the structure used to read and write all the data of the operating system. Professor Messer highlights that different operating systems use different file systems, but some are compatible across multiple OS. For example, FAT32, NTFS, and exFAT are used on Windows, Linux, and Mac OS. For Windows users, the most common file system is NTFS, which replaced FAT32 by adding features such as compression, file encryption, quotas, and other integrated management tools. Although NTFS is widely used and read by many operating systems, some cannot write NTFS data. However, modern versions of Linux and Mac OS can read and write on NTFS partitions. Microsoft is also working on the next-generation file system, called ReFS (Resilient File System), which is an improvement over NTFS. ReFS is designed for server and desktop environments, with support for very large amounts of data and high resilience. This file system can self-repair and constantly check its integrity, eliminating the need to use tools like Check Disk. ReFS also integrates RAID features to create redundant file systems with redundant storage. Although ReFS is not yet widely adopted, Microsoft continues to update and improve it. Another historical file system is FAT (File Allocation Table), with its more recent version FAT32. FAT32 allows volumes of 2 terabytes with a maximum file size of 4 GB, but it is often replaced by other file systems due to current needs for larger storage. exFAT, created by Microsoft for flash storage, allows much larger files than FAT32 and is compatible with many operating systems. For Linux and Android users, ext4 is a common file system. Linux is also used in many data centers, where the XFS file system is preferred for its high performance and efficiency. XFS supports very large file system sizes, includes journaling to minimize corruption, and reduces fragmentation to optimize performance. Finally, Apple has developed its own file system, APFS (Apple File System), optimized for SSDs. APFS integrates encryption, allows for quick backup and restore from snapshots, and offers high data integrity options. In summary, understanding the different file systems and their characteristics is essential for optimizing the use of operating systems and storage devices. Each file system has its own advantages and disadvantages, and the choice of the right system depends on specific storage and performance needs. To learn more, watch the full video: https://www.youtube.com/watch?v=lwCu2rpXP1E