Reviewing the Synology DS1817+ with M2D17

Conclusion

The DS1817+ is a another great NAS from Synology as you can enable SSD cache without sacrificing any of the drive bays.

It is a good choice if you are looking to upgrade from a 4 or 5 bays NAS. However, the benefits might be marginal if you are upgrading from the DS1815+ unless you are looking enabling SSD cache via the M2D17 dual SSD adapter.

The reading and writing performance definitely improved when the SSD cache is enabled using the Samsung 850 EVO and Western Digital Blue M.2 SSDs. The network transfer should also improve correspondingly.

For those who are running virtual machines via the Synology Virtual Machine Manager, you will be pleasantly surprised by the performance boost that SSD read-write cache will bring. In our benchmark, read and write latencies reduced as much as 400% and IOPS improved by almost the same factor.

Lastly, my advice to potential M2D17 adopters is to use similar performance SSDs for read-write cache. I suspect the latency spikes observed while benchmarking the performance of read-write are due to the difference in the individual SSDs’ performance. As mentioned earlier, the spikes are statistical outliers as the median and standard deviations looks pretty ok.

4 thoughts on “Reviewing the Synology DS1817+ with M2D17

  • July 28, 2017 at 11:16 am
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    drool ~~~~

  • August 31, 2017 at 4:23 am
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    i’ve been looking at upgraded NAS offerings. this seems like a great choice, my workflows are mostly IOPS limited, so this would represent a significant increase in performance and a significant decrease in keyboard smashing stress.

  • January 10, 2018 at 10:50 am
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    Good review. Do you know if it possible to use an M.2 SSD installed in the M2D17 card as an extra storage device? Such as using it to run all your app’s etc (docker, virtual machines…) instead of running them off the array. I currently use slot 8 with an SSD installed for this purpose

  • January 10, 2018 at 12:32 pm
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    Hi Darren,

    Unfortunately, we can’t use the SSD on the M2D17 as storage volume. It will just appear as SSD cache.

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