I suppose it all boils down to cost vs. how bad you want the data. I have heard of cases that elctron microscopes have been used to examine data bits in the sectors. So if it's a billion dollar corperation or the government after several million in secrets. It could be justified. If it's someone playing on ebay on company. Get a key logger, catch them and fire them. I read an article were in Sweden they recovered data from a physicaly damaged HDD. It was burned and broken. So it all depends on how bad you want it and how much you are willing to spend. Thats why I use a second encrypted drive and put sensitive files on it and only work with them on it. Thats still not foolproof. As I said. If someone has the money and wants your data enough. They can get it.