A guy who fixes electronics and computers came into my shop today and was telling me about how can recover data. He once sent out a hard drive that was dead to a service that cost 1500$ and when he got it back he asked how they did it. They told him they increased the voltage comming into the hard drive from 5v to 5.3 and it gives them ONE chance to grab data. He said he figured out how to do it and now can offer the same service for 700$.
I was wondering if this is really possible and if so how?