Yup. I had quite a battle with some sort of system bug (never fully traced) where I wrote valid data but what ended up on disk was all zero. It appeared to in

Yup. I had quite a battle with some sort of system bug (never fully traced) where I wrote valid data but what ended up on disk was all zero. It appeared to involve corrupted packets being accepted as valid. It doesn't matter how much you test if something down the line zeroes out your stuff.