On Mon, 1 Oct 2018 19:06:20 -0700 David Christensen said: > If Seagate Seatools is happy with the 2 TB drive, that should eliminate > the 2 TB drive, the cable, and the motherboard port as sources of the > problem. I'm not sure how an on-disk cache problem could definitively be caught without power cycling. What if on-disk controller is ignoring all cache related commands? (cache bypass, cache invalidate, cache flush) Regards -- Abdullah Ramazanoğlu