We used CrystalDiskMark 8‘s custom settings to test the 4K random read performance of the drive through a range of queue depths. The setup for the tests is listed below.
Transfer Request Size: 4KB, Outstanding I/O: 1-32.
Kioxia rate the 4K random read performance of the 2TB Exceria Pro as up to 800,000 IOPS. Using our 4-threaded 4K random testing, the best we saw was 391,308 IOPS (QD32). We did a quick test at QD32 using eight threads which gave a result of 573,040 IOPS.
4K Random Read v QD performance compared.
In relation to the drives around it, the Exceria Pro's slowest performance comes at QD1 where it sits in the bottom half of our results chart and it makes slow progress up the chart in QDs 2 and 4. However, at QD32 the drive's performance sees it jump to a mid-table position.