03-12-2016, 08:45 AM
The 'wave' in the flux data can only be caused by the rotational speed of the disk. Typically, this is almost always due to the drive itself and not the disk, but a disk with clumps of debris can cause this as well. You might want to change USB cables or ports to see if that makes a difference for powering the drive (unless you are using an external power source, in which case it is just flat bad). You could also try a different drive as well. Don't forget that you should be cleaning the disk heads every time you read a disk.