It wasn't mentioned in the blog, but you can set `copies=N` on ZFS filesystems and ZFS will keep N copies of user data. This provides redundancy that protects a

It wasn't mentioned in the blog, but you can set `copies=N` on ZFS filesystems and ZFS will keep N copies of user data. This provides redundancy that protects against bitrot or minor corruption, even if your zpool isn't mirrored. Of course, it provides no protection against complete drive failure.