Couldn't be any more obvious that it's 1 defective head out of 6 thanks to this dd analysis. I ordered another of those horrible quality WD 4TB drives to pull the head stack and transplant it into this P.O.S. failing drive to try and get the last files out of it before I throw both of them in the trash. The sixth head gave up a handful of weeks after the 2 years warranty has gone out. I'm never purchasing a WD drive ever again. I've never seen an internal, secondary drive last that short of a lifespan in over 22 years. I've used all sorts of hard drives both in towers and laptops, many brands including Quantum, Maxtor, Hitachi, Toshiba and Seagate. I've never ever seen a 5400rpm, SECONDARY drive in a well ventilated TOWER fail like this in 2 years for no reason. I'll remind readers here that the drive makes NO SOUND whatsoever, no clicking, no grinding, speed up time is super quick, transfer speeds are above 170MB/s on SATA. The drive appears in perfect shape, except for the sixth head, almost completely failed (copies on that platter at 1.8KB/s)
