IOMeter - 4K Random Performance with QD
4K random read had the Black 2 HDD topping out at around 325 IOPS at QD32, while the Toshiba SSHD tops out at around 200 IOPS.
4K random write showed the Black 2 HDD with consistent performance across the entire queue depth range.
Looking over the Black 2 SSD performance, we find the drive coming in just shy of 60,000 IOPS.
4K write had the Black 2 SSD touching 35,000 IOPS.