Bringing a Degraded mdadm RAID1 Back From the Brink
A war story about a failed RAID1 mirror, a stubborn superblock, a colon in an array name, a cable knocked loose mid-rebuild, and five bad sectors hiding in — of all things — a rescue image. If you’ve ever stared at add new device failed ... Invalid argument and wondered what you broke, this one’s for you. Claude helped a lot, both during the diagnostic, and to write down this post. At this stage, hallucinations are shared and unvoluntary. ...