I have 8x10TB HGST drives from Ebay that I bought for the server - all in good shape according to SMART Data. And all with Spring Summer 2016 Dates on them so ijust though i'd check warranty if there was any. And i keep getting Invalid Serial, I checked the numbers several times to make sure i wasn't putting in wrong and i've tried different drives/numbers. Any thoughts? even if they are pulls like from Netapps or something shouldn't there be a record?