This is a video of a hard drive failure in action in a RAID1 software RAID setup. In this video you get to see mdraid fail a drive while a replacement command was being issued on the replacement drive already. It simply picked up right back where it left off once it failed the drive in the array.

This video serves as a lesson that redundancy and backups are vitally important to data integrity. Even this simple RAID1 setup saved my butt.

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