[ubuntu] Data recovery from unmountable HDD showing up as "Free space"

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http://ubuntuforums.org – Hello! I have an issue with a hard drive. I know there is data on it, but it is showing up in Windows Disk Management as "Unallocated space" and in Disk Utility as "Free space" I have scanned it with Testdisk (output below). I'm pretty sure all of my data should still be on there, but I have no idea why it isn't showing up, and the drive isn't mountable in either OS. I'm hoping someone has a clever way I can change a few properties to make it magically work, but I am dubious such a solution exists! Is my best bet to try to run Photorec, recover all my files onto the various (Hardware)