I tried to figure out how to reproduce the logo at one point (10+ years ago, when people were less worried about dying drives). IIRC, it's that the EFM patterns

I tried to figure out how to reproduce the logo at one point (10+ years ago, when people were less worried about dying drives). IIRC, it's that the EFM patterns used to make the pixels don't make valid Red/Yellow Book sector contents, which causes some weird behavior if you try to read them as such.