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Silicon Motion SM2246EN SSD Controller Preview

By: Chris Ramseyer | SSDs in Storage | Posted: Sep 2, 2013 1:01 pm

HD Tune Pro


Version and / or Patch Used: 4.00

Developer Homepage:

Product Homepage:


HD Tune is a Hard Disk utility which has the following functions:


Benchmark: measures the performance

Info: shows detailed information

Health: checks the health status by using SMART

Error Scan: scans the surface for errors

Temperature display


HD Tune Pro gives us accurate read, write and access time results and for the last couple of years has gained popularity amongst reviewers. It is now considered a must have application for storage device testing.





The little four channel controller that could. I looked through the office to find a SF-2241 SSD in 120GB capacity size for a direct comparison, but couldn't find a drive with the right specifications. We have M.2 drives with LSI SandForce and Marvell 4-channel controllers, but didn't want to cloud the results with M.2 drives since all of the results on the charts are from 2.5" form factor products.


The SM2246EN with this flash combination appears to be in the top group of drives when it comes to sequential read performance.




The sequential write performance could use a bit of help. We noticed something odd with this drive, something I don't ever recall seeing before. The sequential write speed is nearly identical to the results in ATTO. We typically see around a 100 MB/s difference on the top tier SSDs between ATTO and HD Tune Pro. The Silicon Motion reference design only loses around 10 MB/s in HD Tune Pro.



HD Tach - Sequential Write Performance after Random Writes




After running through the HD Tune Pro random read and write tests, we ran HD Tach to see how much write performance was lost after a realistic consumer load of random writes. For the most part the Silicon Motion reference design did well, but we did see two large dips where performance dropped to 25 MB/s. This is something we always look for because large dips like this, when frequent, produce a poor user experience.

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