Emre Kurnaz's IT Diary

Introduction RAID (Redundant Array of Independent Disks) provides fault tolerance and performance benefits, but even the best setups can experience failures. Understanding how RAID handles disk failures and how to recover from them is crucial for system administrators. In this guide, we will simulate RAID failures using  mdadm , analyze failure scenarios, and practice recovery techniques for RAID 0, 1, 5, and 10. Preparing a RAID Environment Before simulating failures, ensure you have a working RAID setup. If you don’t already have a RAID array, create one using the guide from our previous article. Simulating Failures in RAID RAID 0 (Striping) – Single Disk Failure RAID 0 offers performance benefits but no redundancy. A single disk failure leads to total data loss. Failure Simulation: sudo mdadm --fail /dev/md0 /dev/sdb Check RAID Status: cat /proc/mdstat sudo mdadm --detail /dev/md0 Expected Outcome: The entire RAID array fails, making data recovery impossible. If thi...