SCENARIO: OS: linux debian 6 Software Raid: raid 1 created with mdadm Failed drive: sata drive (/dev/sda) of size 500Gb New drive: same size or bigger sata drive. In my case 1Tb sata drive WHAT TO DO: 1. Shutdown server, 2. Replace failed disk, 3. Start server, 4. Rebuild Raid 1, 5. Update grub. LOOK…