No, he didn't say that at all. He said, and I quote direct from your link: "ZFS can mitigate this risk to some degree". That does not equal "you don't need ECC RAM". Risk mitigation does not mean removing risk all together. ("Mitigate" means "to make something less severe" - as in you can mitigate the loss of a leg with a prosthetic, but you still don't have your leg). He then went on to say (and again I quote): "if you love your data, use ECC RAM" That's pretty black and white. His comparisons to other file systems is that their integrity checking is no better without ECC than ZFS is without ECC, which is a bit of a "well duh" statement. As has been repeated in this thread, ECC is mandatory if you care about strict data integrity on any next-gen file system. That's not a ZFS-specific statement. That's just a fact about current computer architecture, independent of what's on your hard disk.