WD Blue SN570 1TB SSD Review

We test the 4K random read performance of a drive through a range of queue depths. The setup for the tests is listed below.

4K Random Read

Transfer Request Size: 4KB, Outstanding I/O: 1-32.

WD rate the 1TB Blue SN570 at up to 460,000 IOPS for 4K random reads. With our 4-threaded test, we were unable to reach this figure, our test producing a maximum of 358,931 IOPS. The drive climbs steadily through the tested queue depths until QD16 where the performance starts to level off; 356,215 IOPS at QD16, 358,931 IOPS at QD32.

4K Random Read v QD Performance compared.

We may not have been able to match WD's maximum 4K random read rating for the drive but it still produces some impressive test results sitting in the top 5 of drives tested until the QD32 mark where it slips down the chart.

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