Sustained and scaling I/O rates
Our sustained IOMeter test hammers drives with 4KB random writes for 30 minutes straight. It uses a queue depth of 32, a setting that should result in higher speeds that saturate each drive's overprovisioned area more quickly. This lengthy—and heavy—workload isn't indicative of typical PC use, but it provides a sense of how the drives react when they're pushed to the brink.
We're reporting IOps rather than response times for these tests. Click the buttons below the graph to switch between SSDs.
The TR200's peak is modest and brief. It doesn't take very long to collapse down to a rather low steady-state speed.
Peak speeds exceed the Trion 150's, so we'll call that a win for the TR200. Steady-state speeds, however, are as low as they come. This could be the lack of DRAM rearing its ugly head, but without more implementation details than Toshiba's willing to share, we can't be sure.
Our final IOMeter test examines performance scaling across a broad range of queue depths. We ramp all the way up to a queue depth of 128. Don't expect AHCI-based drives to scale past 32, though—that's the maximum depth of their native command queues.
For this test, we use a database access pattern comprising 66% reads and 33% writes, all of which are random. The test runs after 30 minutes of continuous random writes that put the drives in a simulated used state. Click the buttons below the graph to switch between the different drives. And note that the P3700 plot uses a much larger scale.
The TR200's scaling curves are a pile of uncooked spaghetti. Those lines are so close to straight that you may have to squint and zoom in to see that they aren't. The TR200 doesn't meaningfully scale beyond QD8. This is by no means a dealbreaker for a value drive, but let's look at some other cheapish drives for context.
The Adata SU800's 3D NAND puts on a better show here than the other contenders. The Trion 150 is a jagged mess, and the BX200 is only a little less flat than the TR200. This isn't a drive meant for enterprise workloads like this, to be sure.
The TR200 has yet to impress us. But it's too early to give up hope—a good number of drives do far better in our real-world tests than they do in IOMeter traces. Let's see the drive does with some honest-to-goodness file transfers.