I recently bought this WD20EARS drive on eBay, and I wonder whether it might be a counterfeit.
The label says its a WD20EARS-42R6B0, but if I plug the serial number into the WD warranty check, it shows up as model number WDH1U10000PN rather than WD20EARS. If I run the Windows Data LifeGuard Diagnostic, it gives a different serial number, which the WD warranty check shows as “INVALID SERIAL NUMBER”. Looking harder at the label, the DCX number looks like it might be invalid in that some of the middle letters of the model number suffix (42R6B0) should perhaps be reflected in parts of the DCX number, as suggested at http://community.wdc.com/t5/Desktop-Portable-Drives/Is-this-a-genuine-or-fake-WD-drive/m-p/225354#M6350.
What do you reckon? Any help would be very much appreciated.