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IOMeter — Sequential and random performance
IOMeter fuels much of our latest storage test suite, including our sequential and random I/O tests. These tests are run across the full capacity of the drive at two queue depths. The QD1 tests simulate a single thread, while the QD4 results emulate a more demanding desktop workload. For perspective, 87% of the requests in our old DriveBench 2.0 trace of real-world desktop activity have a queue depth of four or less. Clicking the buttons below the graphs switches between results charted at the different queue depths.

Our sequential tests use a relatively large 128 KB block size.

The 860 Pro's sequential read and write speeds are virtually identical to the 850 series'. The isn't a surprise, since Samsung's drives were already delivering about as much oomph as SATA can bear. If it ain't broke, don't fix it.

Random read and write response times are stellar. The 860 Pro shows a large percentage-wise improvement over its 850 forebears, but they're all perfectly snappy drives with sub-millisecond responses.

So far so good. The 860 Pro 1TB looks every bit as quick as its honorable ancestors. Let's fire off some heavier workloads and see how the drive handles it.