how long works a deeper scan on a 3 or 4 TB HD, (HFS+)
I have unfortunately the second HD which in the osx-finder suddenly is empty

I have already tried diskwarrier, and data rescue. Diskwarrier don't found anything. DataRescue saves files, but none can I open.
Now I run testdisk, and after 14h I have the following status, see attachment:
What can I do? Wait a few days?