File System Implementation and State Simulation

Have you ever wondered exactly how an operating system tracks, stores, and retrieves files on a physical drive? Understanding the underlying mechanics of file systems is essential for systems programmers, security analysts, and curious developers alike. This text-only course demystifies the inner workings of storage systems by breaking down complex concepts into readable, step-by-step explanations. You will transition from theoretical knowledge to a clear mental model of how data moves between memory and disk. What you will learn: - Understand foundational storage concepts, including sectors, blocks, and files. - Explore the anatomy of an inode and how it tracks metadata and file locations. - Track state changes in a simulated file system during creation, write, and deletion operations. - Analyze data block allocation strategies and free-space management techniques. - Practice predicting file system states using simulator-based execution traces. - Learn modern file system resilience concepts, including journaling and copy-on-write patterns. We begin with essential terminology, defining the core structures that make up a standard unix-like file system. Next, you will read through guided walkthroughs that simulate real-world file operations, observing how inodes, bitmaps, and data blocks change state with each transaction. The course concludes with modern best practices for maintaining data integrity and system consistency. This course is designed for beginner-to-intermediate developers, computer science students, and systems enthusiasts who want a solid grasp of storage internals. No prior systems programming experience is required. Start reading today to master the core mechanics of modern file systems.