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Samsung 850 EVO and 850 PRO 2TB SSDs Review

By: Jon Coulter | SSDs in Storage | Posted: Jul 6, 2015 2:00 pm
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TweakTown Rating: 98%Manufacturer: Samsung

70/30 Mixed Workload Test (Sledgehammer)

 

Version and / or Patch Used: Iometer 2014

 

Heavy Workload Model

 

This test hammers a drive so hard we've dubbed it "Sledgehammer". Our 70/30 Mixed Workload test is designed to simulate a heavy-duty enthusiast/workstation steady-state environment. We feel that a mix of 70% read/30% write, full random 4K transfers best represents this type of user environment. Our test allows us to see the drive enter into and reach a steady state as the test progresses.

 

Phase one of the test preconditions the drive for 1 hour with 128K sequential writes. Phase two of the test runs a 70% read/30% write, full random 4K transfer workload on the drive for 1 hour. We log and chart (phase two) IOPS data at 5-second intervals for 1 hour (720 data points). 60 data points = 5 minutes.

 

samsung-850-evo-pro-2tb-ssds-review_69

 

What we like about this test is that it reflects reality. Everything lines up, as it should. Consumer drives don't outperform Enterprise-Class SSD's that were designed for enterprise workloads. Consumer drives based on old technology are not outperforming modern Performance-Class SSD's, etc.

 

The massive capacity of the 2TB 850 EVO and PRO keep performance high for 25minutes before they begin to enter a steady state. The 2TB 850 Pro reaches a steady state at 35 minutes. The 2TB EVO takes 40 minutes to reach a steady state. Both drives perform much better than their smaller counterparts. The 2TB 850 PRO outperforms the 2TB 850 EVO by about 7000 IOPS in this test.

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