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TEST BENCH AND PROTOCOL
In testing the Samsung SM843, along with all enterprise drives, we focus on long term stability. In doing so, we stress products not only to their maximum rates, but also with workloads suited to enterprise environments.
We use many off-the-shelf tests to determine performance, but we also have specialized tests to explore specific behaviors we encounter. With enterprise drives, you will see that we do not focus on many consumer level use-cases.
Our hope is that we present tangible results that provide relevant information to the buying public.
| CPU(s) | Intel Xeon E5-2690 (2.9/3.8GHz, 8C/16T) |
| Intel Xeon E5-2690 (2.9/3.8GHz, 8C/16T) | |
| Motherboard | Intel S2600CO4 |
| RAM | 16GB DATARAM ECC DDR3-1333 REG |
| GPU | Integrated Graphics |
| PSU | Supermicro 650W |
| Chassis | Chenbro SR11269 |
| OS | Windows 7 64-bit |
LATENCY
To specifically measure latency, we use a series of 512b, 4K, and 8K measurements. At each block size, latency is measured for 100% read, 65% read/35% write, and 100% write/0% read mixes.
Once we start to dig deeper into the results of the SM843, you will start to notice a trend. Basically, the read performance is great, while the write performance is only adequate. With the exception of 8KB writes, the other results were in line with Samsung’s specifications.
Everything looks good for 512B and 4KB, but we once again noticed some weirdness with the 8KB transfer size. We reran the tests multiple times and even looked at our SNIA tests that run 25 times each. Every time we observed maximum latency numbers that were much higher than the 512B and 4KB runs.
Luckily, maximum response times, along with averages, don’t tell the entire story. It simply gives us a starting point.