I also don't know if there would be
a message, if it shouldn't work regarding to a copy protection. It might
be that you can copy a media one time, but you might not be able to make
a copy from the copy. I don't know if this could be the case for
Blu-Ray, but at least for consumer audio DAT there's a copy bit. This is
also active for private material. If you make a digital copy of a privat
audio DAT, it anyway will set this copy bit, so that you can't make a
copy from the copy. IOW even if you shouldn't try to illegal copy
something, a copy protection standard might forbid to copy your own
data. _Again, I don't have knowledge about Blu-Ray!_ It's just that for
other media there are such traps.