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Intel IOMeter

Now we will use the latest available version (1.1.0 RC1) of the synthetic benchmark IOMeter, an industry standard in testing disk subsystems. IOMeter is very functional but we will focus on the SSD-relevant characteristics only: random-address reading/writing and sequential reading/writing.

The first test is about reading and writing random-address 4KB data blocks. The request queue depth is limited to 1, but there are four independent data threads: one for each CPU core. This disk usage scenario is closer to real-life applications in a multitasking environment. The test data are pseudorandom.

The second IOMeter test is the same except that the request queue is increased to 32 commands, which means a much higher load on the disk subsystem.

Like in the previous test, the ADATA S511 can be described as the worst among the best SSDs. It’s much faster than the SSDs with asynchronous flash but somewhat slower than the same-class products from Corsair and Kingston with synchronous flash.

In the final test the SSDs are accessed for sequentially placed data in 128KB blocks. The test runs in a single thread at a request queue of 1. Like in the previous tests, the test data are pseudorandom.

We’ve got the same picture as before, the ADATA S511 being somewhat slower than the Corsair Force Series GT and Kingston HyperX that use the same memory type (synchronous flash with ONFI 2.2 interface). This difference must be due to some firmware optimizations.

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