Bitrot and atomic COWs: Inside “next-gen” filesystemsThe raid5 array didn't notice or didn't care about the flipped bit in Finn's picture any more than a standard single disk would. The next-gen btrfs-raid1 system, however, immediately caught and corrected the problem. The results are pretty obvious. If you care about your data, you want a next-gen filesystem. Here, we'll examine two: the older ZFS and the more recent btrfs. What is a “next-generati
