It's really risky process to fix drive partitions on a corrupted hard disk drive. Even if you utilize the greatest toolkit and are absolutely sure in your deeds, you are still risking your files shall something go incorrect. Changes that may be done to the damaged drive are irreversible. You should bear in mind that it's rather easy to overwrite the structure of essential information about your disk. First of all the backup should be provided before the start of the recovery process.
But there're also some other methods of data recovery that are more harmless and simpler in usage, that don't demand to have substitute and restore info. You cannot make a backup replica of the drive, but you may create a total binary snapshot of it or its partition. Then you can persist recovering with diverse approaches for so many times as you like. This is 1 of the methods that is utilized in photo recovery programs.