Is this a genuine or fake WD drive?

WD Internal Drives Desktop & Mobile Drives
5

I have some additional observations in regard to the PCB part number, PCB date code, and R/N in the following thread:

http://community.wdc.com/t5/Desktop/WD20EARS-00MVWB0-and-AAM-option-Supported-and-Not-Supported/m-p/226958#M6398

AFAICT, the last 4 digits of the R/N (on the label) should be present in the PCB p/n. The rear of the PCB may also have a YWW date code.