I always wonder why this kind of drive-internal encryption comes up in serious discussions. To me it makes no sense whatsoever: I have no way of checking if the

I always wonder why this kind of drive-internal encryption comes up in serious discussions. To me it makes no sense whatsoever: I have no way of checking if the drive actually encrypts the data, I don't know what happens to my password, where is it stored, who else gets access to it (or my data), etc. How can anyone consider this "transparent" encryption to be secure?