Re: new disk format
The thing is, what if the .docx was corrupted from the outset, meaning the copy that's giving the system a hissyfit is in the snapshot, too? Plus, what's to prevent me from changing its assigned role? Finally, what about container formats that are multi-purpose. I can tell you magic numbers won't easily allow a computer to distinguish between an .epub, a .odt, and a .zip (because they're all, structurally, essentially identical to the last).