French Microsoft Developer Pascal Belaud had some serious problems with his hard disk drive back in June and he used the old freeze-o-drive solution to get his 25GB of backup back from his ailing hard drive.
Pascal then investigated why freezing hard drives to sub-zero temperatures actually works well on hard drives.
Microsoft France technical and security director, Bernard Ourghanlian, gave a very elaborate talk from an electronic and a mechanical point of view.
It appears that this ‘technique’ is used quite often by data recovery firms (which charge hundreds for performing the process).
More information here.