Samsung 845DC EVO SSD Review: 3-Bit MLC Hits The Enterprise

Results: 4 KB Random Performance And Latency

Samsung's 845DC EVO is an absolute monster when it comes to random, small block reads. We easily hit the 87,000 IOPS that the drive is specified for. Only SanDisk's SAS-based Optimus Eco is able to top the 845DC EVO in this test.

Results are much more muted in our random write testing. Though they're still above Intel's SSD DC S3500, the 845DC EVO has a harder time keeping up with more expensive drives.

The outlier is Micron's M500DC, which achieves nearly twice as much performance and is in a similar price range.

The average response time lines up with the random write performance, observed above. That's to say Samsung's 845DC EVO lands near the bottom of the pack.

This chart is much more interesting. The 845DC EVO reports back a great maximum response time result, which is less than half of its nearest competitor.

New from Samsung is a stated Quality of Service (QoS) specification, closely matching what Intel publishes. This figure stipulates that 99.9% of write operations should be under 7 ms. We observed that 100% of all operations completed in under 7.31 ms, coming exceedingly close.

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  • SteelCity1981
    So basicly it's the more durable version of the 840 evo much like opertons and xeons are to the FX and core i7 series.
    3
  • Plusthinking Iq
    like we know now after the ssd endurance test samsung is the worst enterprise candidate.
    -8
  • drewriley
    Anonymous said:
    So basicly it's the more durable version of the 840 evo much like opertons and xeons are to the FX and core i7 series.


    Yes, that's a fair analogy. Just like the Xeon E3-1275v3 is an i7-4770K, but with ECC support.
    3
  • damric
    I've yet to see an SSD fail due to read/write endurance. I only see them fail when the controller gets bugged, which seems to happen all the time, especially on loss of power.
    2
  • soundping
    I'm guessing this SSD doesn't have to new firmware code that extends life and speed.
    0
  • jase240
    Another win for the EVO. This SSD modified for enterprise workloads makes it a good buy for webservers.

    Hopefully the price will go down after launch, and then I see this being the best choice of webhosts.

    Cheaper and adequate for that workload.
    0
  • Nightmare Twily
    Eh I'll keep my 840 EVO 250GB
    0
  • Nuckles_56
    "Even still, I wand to commend Samsung's execution." (last page 1st paragraph) I guess that is supposed to be want, unless Drew Riley has become a wizard now :D
    0
  • Menigmand
    Commending their execution would be a bit harsh, don't you think?
    0
  • drewriley
    Anonymous said:
    Commending their execution would be a bit harsh, don't you think?


    I'm sure worse things were said about Samsung at WWDC '14 yesterday ;)
    0
  • drewriley
    Anonymous said:
    "Even still, I wand to commend Samsung's execution." (last page 1st paragraph) I guess that is supposed to be want, unless Drew Riley has become a wizard now :D


    Now that you mention it.....
    0
  • eriko
    4KB random write, and average response time.

    Nuff said.

    You'd have to be out your mind to put TLC in a a critical environment.
    -1
  • patrick47018
    @eriko everyone's critical environments need a little tender loving care
    1
  • photonboy
    The 845dc isn't necessarily the "worst enterprise candidate"; for one thing it wasn't the bottom in every test.

    For another, it's more about VALUE and that's the main point of the article. I assume the top SSD's in this category were MLC not TLC and also more expensive.
    1