Both disks are reporting a problem, though SMART looks healthy, they are connected to a controller with a SATA port multiplier, and it's a Marvell, two things that can cause issues on their own, worse when they are together, connect those 2 disks and disks 2, 5 and 7 (the other ones connected to the port multiplier) to the Intel SATA ports which are not being used and post new diags.