Error

I am trying to recover lost data on a bad sector of our NAS raid. That data seems to be there although not visible in the directory. When copying the directory location with WinSCP the names of the files missing show up in the following error-

Copying file 'directory location/file name' failed.

Received error message from remote side: 'directory location/file name: Input/output error'

Is there anything further I can do to try to copy this data?