CES 2015: Silicon Motion SM2256 seen in action, capable of hybrid TLC/SLC caching

Subject: Storage, Shows and Expos | January 8, 2015 - 01:17 AM |
Tagged: CES, ces 2015, silicon motion, SM2256, ssd, tlc, slc

We first saw the Silicon Motion SM2256 controller at Flash Memory Summit, but now we've seen it live, in action, and driving several different types of TLC NAND.

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Silicon Motion had this live demo running on a testbed at their suite:

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The performance looked very good considering the 2256 is designed to efficiently push TLC flash, which is slower than MLC. As their representative was explaining that the SM2256 is currently being tested with Samsung, Toshiba, and SK Hynix TLC flash, I noticed the HDTune write trace:

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Those familiar with HDTune and Samsung SSDs with Samsung's TurboWrite cache (from the 840/850 EVO) will recognize the above - the SSD begins writing at SLC speed and after that cache is full, the SSD then drops to writing at TLC speed. I specifically asked about this, as we've only Samsung flash provisioned with an SLC portion of each die, and the answer was that Toshiba and SK Hynix TLC flash also supports such a subdivision. This is good news, as it means increased competition from competing SSDs that can accomplish the same SLC burst writes as the Samsung EVO series.

We heard from a few vendors that will soon be launching SM2256 equipped SSDs this year, and we eagerly await the opportunity to see what they are capable of.

Coverage of CES 2015 is brought to you by Logitech!

PC Perspective's CES 2015 coverage is sponsored by Logitech.

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