Subject: Storage | March 3, 2015 - 06:16 PM | Jeremy Hellstrom
Tagged: tlc, ssd, SM2256, slc, silicon motion
You may remember the Silicon Motion SM2256 SSD controller that Al reported on during CES this year, even if you do not you should be interested in a controller which can work with 1x/1y/1z nm TLC NAND from any manufacturer on the market. The SSD Review managed to get a prototype which uses the new SM2256 controller, Samsung’s 19nm TLC planar NAND flash and a Hynix 440Mhz 256MB DDR3 DRAM chip. In benchmarking they saw 548MB/s sequential reads and 484MB/s writes, with 4K slowing down to 38MB/s for read and 110MB/s for write. Check out the rest of the review here as well as keeping your eyes peeled for our first review of the new controller.
"Controllers are the heart and soul of every SSD. Without one, an SSD would be a useless PCB with some components slapped on it. It is responsible for everything from garbage collection and wear leveling to error correction and hardware encryption. In simple terms, all these operations can be quite complicated to implement as well as expensive to develop."
Here are some more Storage reviews from around the web:
- Crucial's BX100 and MX200 @ The Tech Report
- Crucial MX200 250 GB @ techPowerUp
- Crucial BX100 SSD @ HardwareHeaven
- OCZ ARC 100 480GB SSD Review @ NikKTech
- Thecus W4000 WSS NAS @ Kitguru
- WD My Cloud DL4100 Business NAS Review @ Techgage
- ASUSTOR AS7010T NAS Server Review @ NikKTech
- SilverStone TS431S 4-Bay miniSAS DAS Storage Tower @ eTeknix
Subject: Storage, Shows and Expos | January 8, 2015 - 01:17 AM | Allyn Malventano
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.
Silicon Motion had this live demo running on a testbed at their suite:
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:
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.
Follow all of our coverage of the show at http://pcper.com/ces!
Subject: Storage, Shows and Expos | August 7, 2014 - 05:37 PM | Allyn Malventano
Tagged: ssd, SM2256, silicon motion, sata, FMS 2014, FMS
Silicon Motion has announced their SM2256 controller. We caught a glimpse of this new controller on the Flash Memory Summit show floor:
The big deal here is the fact that this controller is a complete drop-in solution that can drive multiple different types of flash, as seen below:
The SM2256 can drive all variants of TLC flash.
The controller itself looks to have decent specs, considering it is meant to drive 1xnm TLC flash. Just under 100k random 4k IOPS. Writes are understandably below the max saturation of SATA 6Gb/sec at 400MB/sec (writing to TLC is tricky!). There is also mention of Silicon Motion's NANDXtend Technology, which claims to add some extra ECC and DSP tech towards the end of increasing the ability to correct for bit errors in the flash (more likely as you venture into 8 bit per cell territory).