Photoshop CS6 Corrupted File recovery
Solution 1:
Do you have Shadow Copy enabled?
Try right-clicking on the file, and see if you presented with the "Restore Previous Versions" option.
If you are lucky, you will be able to find a recent backup, rather than having to try to repair it.
Solution 2:
I haven't tested this, but
in theory it could be possible. This link
https://forums.adobe.com/thread/954685?start=0&tstart=0
mentions that "SD File format specificiation, which is downloaded with the SDK.
PSD is a complex format. But yes it has a header, followed by chunks of data for layer structure, layer contents, etc. Photoshop does try to read the parts that are readable. But if the header or layer structure is messed up, then there may not be enough info to read much of the file."
And there is some software that can try to extract the layers from it
http://www.telegraphics.com.au/sw/product/PSDRecover
They have an online tool currently down http://www.telegraphics.com.au/psdparse-online/
And a command line tool
http://www.telegraphics.com.au/sw/product/psdparse
http://www.telegraphics.com.au/sw/files/psdparse-3.6f1-win32.zip
Another company and program that does Photoshop file recovery is here-
http://www.stellarinfo.com/psd-repair.php