Well, I'm asking specifically if the author saw corruption that snuck past the checksumming features that postgres has. Extra layers are always good, but since

Well, I'm asking specifically if the author saw corruption that snuck past the checksumming features that postgres has. Extra layers are always good, but since I was one of the main authors of checksums in Postgres, I'd like to know if there's room for improvement. (Aside: the page checksum is only 16 bits, so if you have frequent corruption it's entirely believeable that a few sneak past. But I haven't seen it personally.)