Understanding RAID: Disk Array Operations and Storage Redundancy

Data loss and slow disk performance can cripple any system, making robust storage configuration a critical skill for IT professionals. Understanding how redundant arrays of independent disks protect and accelerate data delivery is essential for building resilient systems. This text-only course guides you through the fundamental mechanics of disk arrays, helping you conceptualize and simulate RAID operations without needing expensive hardware. You will transition from understanding basic storage terminology to analyzing complex read/write behaviors, data striping, parity calculations, and modern software-defined storage solutions. What you'll learn: Learn the foundational terminology of storage media, disk sectors, and block-level operations; Understand the core RAID levels including RAID 0, 1, 5, 6, and 10, along with their performance trade-offs; Map logical block addresses to physical disk locations to trace how data is distributed; Calculate parity and simulate disk failure and recovery scenarios to understand data rebuilding; Explore modern storage concepts including NVMe arrays, ZFS pools, and software-defined RAID configurations; Analyze read and write performance characteristics for different array architectures under real-world workloads. The course starts with essential storage definitions before moving into step-by-step walkthroughs of block mapping and parity calculations. You will conclude by exploring modern filesystem-based RAID and cloud storage replication principles. This course is designed for aspiring systems administrators, IT support specialists, and curious tech enthusiasts. No prior hardware configuration experience is required. Start building your foundational knowledge of storage redundancy and disk array operations today.