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Samsung SM863 & PM863 960GB Enterprise SATA III SSD Review

By: Jon Coulter | SSDs in IT/Datacenter | Posted: Jan 20, 2016 2:46 pm
TweakTown Rating: 96%Manufacturer: Samsung

128K Sequential Write/Read

 

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We precondition the drive for 6,500 seconds, or 1.8 hours, receiving performance data every second. A sequential steady state is achievable in a much shorter span of time than a random steady state. We plot both MB/s and Latency. We plot MB/s using blue scatter and Latency using orange scatter. We observe that both the SM863 and PM863 achieve steady state at 0 seconds of preconditioning, indicating that the previous 2x plus LBA fill phase achieved a sequential steady state. Both drives exhibit tight, consistent performance.

 

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Samsung specs the 960GB SM863/PM863 as capable of delivering up to 485/475 MB/s sustained sequential write speeds. With our configuration, we can extract significantly better results. The SM863 is delivering 530 MB/s at QD8-32, the PM863 510 MB/s at QD8-32; indicating that Samsung's sequential write specifications are quite conservative. As we've seen so far, the SM863 is capable of delivering a nice performance boost over the 845DC EVO. The M510DC is again easily outperformed by all three of Samsung's offerings.

 

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All of the drives in our test pool achieve maximum performance at QD4. The PM863 is the star of the show delivering a massive 559 MB/s sustained sequential read performance. This is well over the 520 MB/s quoted by Samsung. The SM863 is not far behind, with 555 MB/s sustained sequential read performance. Micron's M510DC is again overmatched.

 

Conclusion: All of the Samsung offerings in our test pool deliver best-in-class sequential performance.

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