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In testing the Micron P420h, 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.
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.
It’s unfortunate that we had so much write latency at 512 bytes, because it completely overshadows the performance at 4KB and 8KB, and read operations in general, which were really good.
We see the same thing with maximum latency, where 512 bytes latency is off the charts compared to the other metrics. Read latency is particularly impressive, where the maximums were very low.
Great review. Did you know tweaktown got Sandisk’s A110 PCIe SSD to review?
Yes…as well as Tom’s. It sometimes works like that and, if you stay tuned, you may see an exclusive M.2 report in the near future that we were lucky to grab.
page four, blue graph at the bottom (4K Read Steady State, 1 Hr at QD256) shows “LATENCY (ms)” in the left vertical axis name with values from 700.000 to 800.000.
Obviously it’s NOT latency, but it is IOPS which is really fantastic result. The sentence right below the graph clearly says this, I just wanted to point out as I know Les reads these comments and I’m pretty sure he will correct the graph very quickly.
And for sure, target audience knows to separate apples from oranges so it’s really obvious for us. Not too much average Joes are going to buy 1.4TB PCIe drive for three thousands to speed up loading of Windows 7 or Near Cry or whatever the game name is 🙂
Thank you for pointing that out! Will get to it.
How do you make this nice charts ?
Does it support NVMe?
this drive does not report TRIM support 🙁