This guide can serve as a general to do list when you receive a disk error on a NAS device protected by redundant disks, for example: RAID 1, RAID 4, RAID 5, etc. With this process, you will not have any data loss, unless you unplug the wrong disk or perform the steps indicated here not in the correct order. So, please pay attention to the instructions.
First of all it’s important to identify the correct disk to replace, and keep in mind that, for data loss risks, you do not want to run a failing disk for long. A failing disk is a disk on which, bad sectors are starting to appear, and the SMART disk troubleshooting indicates an imminent failure. Continue reading “Replace Failed Drive in RAID Array”