Quote Originally Posted by cb88 View Post
And anyone wanting data integrity is going to be running raid as there isn't anything saying that a whole drive couldn't go kaput. noone will rely on the FS alone to save them...
The point isn't really for the FS alone to save you from a hardware failure, it's that there are failure modes in which you won't even know that a failure happened unless something is hashing the data on a regular basis. It doesn't have to be the filesystem, but that's arguably a reasonable place to do it (and ZFS is really more like a combination of filesystem/volume management/softraid than just a FS anyway).