I've got a bunch of old Seagate and WD drives. Is there any way I can determine if they're OEM drives or not based on their serial number? I know one of the drives is definitely OEM (it has the OEM sticker on it), yet the WD website serial number checker doesn't say so, so I'm having my doubts about the accuracy of this. So I'm basically wanting to know if it's possible to track the origin of the drives based on their serial number.