cgrew: Just spoke to a mate who works for Sony Playstation NZ, and he said that the larger HDD's have more memory put aside for system usage. And that the bigger HDD's (500GB for instance) utilize this to be operational after the available space has been used up.
To be honest, that doesn't make any kind of sense at all but whatever. No kidding larger HDDs have more "memory" put aside, that's already been fairly well established. The question is why and it doesn't sound like your mate has any more clue than the rest of us. What do you take "utilize this to be operational after the available space has been used up" to mean?