It's really risky process to recover disk partitions on a damaged hard disk drive. You may even apply one of the greatest data recovery tools and be certain in your deeds, you are still risking to waste your data. Alterations made to the damaged disk are irreversible; it is really simple to destroy an important disk structure containing vital information about your hard drive, files and data. Bottom line: it pays to backup before performing data recovery. Or is it?
You can find the other approach to file recovery procedure that may be even safer and simpler and it does not need to have substitute. There is a system of total double image that you can apply to your drive or the partition that is being recovered. After that you may make a repairing with the different settings on this image for as many variants as you demand. This is 1 of the possibilities of data recovery software.