01-23-13: MarkpaoMark, back up regularly and you won't have to worry about using data recovery services, which are expensive and very often are only partially successful.
Before sending the "bad" hard drive across the country to one of those expert hard drive restoration places ....
Better yet, use a drive imaging program (e.g., Windows 7 Backup, Mac Time Machine, Acronis True Image, or what I use, Terabyte Unlimited's Image for Windows), and you won't even have to spend significant time reinstalling software following a hard drive replacement.
Best regards,
-- Al