Subject: Storage | December 30, 2015 - 02:21 PM | Allyn Malventano
Tagged: transcend, slc, mlc, ssd, flash, SuperMLC
Last year we saw Micron toy with the idea of dynamically flipping flash memory dies between SLC and MLC modes. Ok paper, it sounded like a great idea - get the speed of SLC flash while the SSD is up to 50% full, then start shifting dies over to MLC mode to get the higher capacity. This tech did not exist until the ability to flip dies between modes existed, which was not until shortly before the M600 SSDs were introduced. Realize this is different than other types of mixed mode flash, like that on the Samsung 'EVO' models, which have a small SLC segment present on each TLC die. That static partitioning kept those types of solutions more consistent in performance than the M600 was when we first evaluated its performance.
What if we borrowed the idea of keeping the flash mode static, but just keeping to the faster mode? Transcend has announced it will be doing just that in the coming year. These will be SSDs equipped with MLC flash, but that flash will be configured to operate in SLC mode full time. This will enable ~4x write speeds and higher endurance ~30,000 write cycles compared to ~5-10k P/E cycle figures of the same flash operating in MLC mode. This performance and endurance boost comes at a cost, as these SSDs will consume twice the flash memory for the equivalent MLC model capacity. We predict this type of substitution for standard SLC flash will be a continuing trend since SLC flash production volume is insignificant compared to MLC. This trick gets you most of the way to SLC performance and endurance for (in the current market) less cost/GB of a straight SLC SSD.
Upcoming Transcend models to include SuperMLC technology:
- SSD510K - 2.5”
- MSA510 - mSATA
- HSD510 - half slim
- MTS460 & MTS860 - M.2
Given that we are anticipating a launch of the Samsung 850 EVO very shortly, it is a good time to back fill on the complete performance picture of the 850 Pro series. We have done several full capacity roundups of various SSD models over the past months, and the common theme with all of them is that as the die count is reduced in lower capacity models, so is the parallelism that can be achieved. This effect varies based on what type of flash memory die is used, but the end result is mostly an apparent reduction in write performance. Fueling this issue is the increase in flash memory die capacity over time.
There are two different ways to counteract the effects of write speed reductions caused by larger capacity / fewer dies:
- Reduce die capacity.
- Increase write performance per die.
Recently there has been a trend towards *lower* capacity dies. Micron makes their 16nm flash in both 128Gbit and 64Gbit. Shifting back towards the 64Gbit dies in lower capacity SSD models helps them keep the die count up, increasing overall parallelism, and therefore keeping write speeds and random IO performance relatively high.
Subject: Storage | October 6, 2014 - 02:51 PM | Jeremy Hellstrom
Tagged: ssd, slc, mlc, micron, M600, Dynamic Write Acceleration
The Tech Report took a different look at Micron's M600 SSD than Al did in his review. Their benchmarks were focused more on a performance comparison versus the rest of the market, with over two dozen SSDs listed in their charts. As you would expect the 1TB model outperformed the 256GB model but it was interesting to note that the 256GB MX100 outperformed the newer M600 in many tests. In the final tally the new caching technology helped the 256GB model perform quite well but it was the 1TB model, which supposedly lacks that technology proved to be one of the fastest they have tested.
"Micron's new M600 SSD has a dynamic write cache that can treat any block on the drive as high-speed SLC NAND. This unique feature is designed to help lower-capacity SSDs keep up with larger drives that have more NAND-level parallelism, and we've tested the 256GB and 1TB versions to see how well it works."
Here are some more Storage reviews from around the web:
- MyDigitalSSD BP4e mSATA SSD @ The SSD Review
- Top 10 SSDs: Price, performance and capacity @ The Register
- Micron M600 M.2 SATA SSD @ The SSD Review
- Some thoughts on the performance of SSD RAID 0 arrays @ Hardware Secrets
- Transcend SSD370 128GB SSD Review @ Legit Reviews
- Micron M600 SSD @ The SSD Review
- QNAP TS-653 Pro @ Legion Hardware
- QNAP SilentNAS HS-251 NAS Server Review @ NikKTech
- Mach Xtreme MX-ES Ultra SLC USB 3.0 Flash Drive @ The SSD Review
- Silicon Power Marvel M70 64GB USB 3.0 Flash Drive Review @ NikKTech
Introduction and Specifications
Today Micron lifted the review embargo on their new M600 SSD lineup. We covered their press launch a couple of weeks ago, but as a recap, the headline new feature is the new Dynamic Write Acceleration feature. As this is a new (and untested) feature that completely changes the way an SSD must be tested, we will be diving deep on this one later in this article. For the moment, let's dispose with the formalities.
Here are the samples we received for testing:
It's worth noting that since all M600 models use 16nm 128Gbit dies, packaging is expected to have a negligible impact on performance. This means the 256GB MSATA sample should perform equally to its 2.5" SATA counterpart. The same goes for comparisons against M.2 form factor units. More detail is present in the specs below:
Highlights from the above specs are the increased write speeds (no doubt thanks to Dynamic Write Acceleration) and improved endurance figures. For reference, the prior gen Micron models were rated at 72TB (mostly regardless of capacity), so seeing figures upwards of 400TB indicates Micron's confidence in their 16nm process.
Sorry to disappoint here, but the M600 is an OEM targeted drive, meaning its 'packaging' will likely be the computer it comes installed in. If you manage to find it through a reseller, it will likely come in OEM-style brown/white box packaging.
We have been evaluating these samples for just under a week and have logged *many* hours on them, so let's get to it!
Subject: Storage, Shows and Expos | September 16, 2014 - 02:29 PM | Allyn Malventano
Tagged: ssd, slc, sata, mlc, micron, M600, crucial
You may already be familiar with the Micron Crucial M550 line of SSDs (if not, familiarize yourself with our full capacity roundup here). Today Micron is pushing their tech further by releasing a new M600 line. The M600's are the first full lineup from Micron to use their 16nm flash (previously only in their MX100 line). Aside from the die shrink, Micron has addressed the glaring issue we noted in our M550 review - that issue being the sharp falloff in write speeds in lower capacities of that line. Their solution is rather innovative, to say the least.
Recall the Samsung 840 EVO's 'TurboWrite' cache, which gave that drive a burst of write speed during short sustained write periods. The 840 EVO accomplished this by each TLC die having a small SLC section of flash memory. All data written passed through this cache, and once full (a few GB, varying with drive capacity), write speed slowed to TLC levels until the host system stopped writing for long enough for the SSD to flush the cached data from SLC to TLC.
The Micron M600 SSD in 2.5" SATA, MSATA, and M.2 form factors.
Micron flips the 'typical' concept of caching methods on its head. It does employ two different types of flash writing (SLC and MLC), but the first big difference is that the SLC is not really cache at all - not in the traditional sense, at least. The M600 controller, coupled with some changes made to Micron's 16nm flash, is able to dynamically change the mode of each flash memory die *on the fly*. For example, the M600 can place most of the individual 16GB (MLC) dies into SLC mode when the SSD is empty. This halves the capacity of each die, but with the added benefit of much faster and more power efficient writes. This means the M600 would really perform more like an SLC-only SSD so long as it was kept less than half full.
As you fill the SSD towards (and beyond) half capacity, the controller incrementally clears the SLC-written data, moving that data onto dies configured to MLC mode. Once empty, the SLC die is switched over to MLC mode, effectively clearing more flash area for the increasing amount of user data to be stored on the SSD. This process repeats over time as the drive is filled, meaning you will see less SLC area available for accelerated writing (see chart above). Writing to the SLC area is also advantageous in mobile devices, as those writes not only occur more quickly, they consume less power in the process:
For those worst case / power user scenarios, here is a graph of what a sustained sequential write to the entire drive area would look like:
Realize this is not typical usage, but if it happened, you would see SLC speeds for the first ~45% of the drive, followed by MLC speeds for another 10%. After the 65% point, the drive is forced to initiate the process of clearing SLC and flipping dies over to MLC, doing so while the host write is still in progress, and therefore resulting in the relatively slow write speed (~50 MB/sec) seen above. Realize that in normal use (i.e. not filling the entire drive at full speed in one go), garbage collection would be able to rearrange data in the background during idle time, meaning write speeds should be near full SLC speed for the majority of the time. Even with the SSD nearly full, there should be at least a few GB of SLC-mode flash available for short bursts of SLC speed writes.
This caching has enabled some increased specs over the prior generation models:
Note the differences in write speeds, particularly in the lower capacity models. The 128GB M550 was limited to 190MB/sec, while the M600 can write at 400MB/sec in SLC mode (which is where it should sit most of the time).
We'll be testing the M600 shortly and will come back with a full evaluation of the SSD as a whole and more specifically how it handles this new tech under real usage scenarios.
Subject: Storage | September 12, 2014 - 05:30 PM | Jeremy Hellstrom
Tagged: SM2246EN, S3C, mlc, Apotop
The Apotop S3C SSD uses the same controller as the Angelbird drive Al reviewed recently. It uses synchronous MLC NAND with the 4 channel present on the Silicon Motion controller and is able to provide more than the specified 490 MB/s read and 275 MB/s write in some benchmarks. It can often read faster than the wrk SSD but the writes cannot always keep up though it is not something likely to be noticeable in real usage scenarios. The MSRP is very attractive with the 512GB model expected to be released at $200. Silicon Motion is likely to start appearing in a lot more SSDs in the near future with this mix of price and performance. Read the full review at Kitguru.
"The new Apotop S3C SSD features the Silicon Motion 2246EN controller which we first reviewed in the Angelbird 512GB wrk SSD back in August this year. The controller impressed us, so we have already high hopes for the Apotop S3C."
Here are some more Storage reviews from around the web:
- PNY XLR8 120 GiB SSD Review @ Hardware Secrets
- Plextor M6 Pro 256GB @ Kitguru
- Plextor M6 PRO 256GB @ eTeknix
- We lift the lid on Intel's Pro 2500 SSD. Shock, horror: It doesn't use its own NAND chips @ The Register
- HGST Ultrastar He6 6TB SAS HDD Review @ NikKTech
- TB (2.5-inch) Hard Drives @ SPCR
- SPYRUS WorkSafe Pro WTG Secure Flash Drive @ The SSD Review
- Synology DiskStaion DS115j @ Legion Hardware
- QNAP TurboNAS TS-451 NAS Server Review @ NikKTech
- Icy Box FlexCage MB973SP 2B Trayless 3-in-2 SATA Backplane @ Kitguru
- Thermaltake BlacX Urban Wi-Fi Edition HDD Docking Station Review @ TechwareLabs
- Angelbird SSD2go Pocket External SSD @ The SSD Review
Subject: Storage | May 28, 2014 - 01:43 PM | Jeremy Hellstrom
Tagged: corsair, Force Series LX, mlc, toggle NAND, SM2246EN
Are you attracted to MLC SSDs with a price under $0.50/GB? Corsair's new Force Series LX uses Silicon Motion's SM2246EN controller and is rated at speeds of up to 560MB/s
sequential write and up to 300MB/s sequential read when tested by ATTO and both the 128GB and 256GB models are available on NewEgg now for just a bit over the recommended price.
FREMONT, California — May 27, 2014 — Corsair, a worldwide designer of high-performance components to the PC hardware market, today announced the release of the Force Series LX solid-state drives (SSD). Available in either 256GB or 128GB capacities, Force Series LX SSDs bring the amazing performance benefits of an SSD to new lower price point – making it easier than ever to move your PC into the SSD fast lane.
The speedy benefits of solid-state drives have long attracted PC enthusiasts, but high prices may have put off some users from making the switch to this faster storage technology. In response to this dilemma, Corsair is bringing all the perks of an SSD to a new, even more budget-friendly price point so everyone can feel the rush. With the Force LX 256GB costing $129.99 and the 128GB just $74.99, there’s never been a better time to upgrade to faster SSD technology.
Powered by a Silicon Motion SSD controller, the Force Series LX SSDs offer fantastic performance up to 10 times faster than that of a conventional spinning-disk hard drive. Force LX’s SATA 3 file transfer speeds of up to 560MB/sec read and 300MB/sec write can massively improve system performance. Operating system start-up and application load times accelerate to mere seconds, anti-virus scans complete far faster, and navigating your PC’s files feels much more responsive thanks to near-instant access times.
A slim-line 7mm aluminum housing makes it easy to install the Force LX into almost every desktop or notebook PC with a 2.5 inch drive bay -- an ideal upgrade to breathe new life into an notebook, ultrabook or PC in need of a boost. Corsair’s bundled SSD Toolbox software utility is also included as a free download, allowing you to easily optimize your SSD’s performance, clone your existing hard drive, or securely erase all data on a drive. TRIM, NCQ and S.M.A.R.T. technologies automatically maintain drive performance for years to come, and Corsair tops off the package with a 3 year warranty and legendary customer service for total peace of mind.
Subject: Storage | July 15, 2013 - 04:05 PM | Jeremy Hellstrom
Tagged: sandisk, Extreme II series, ssd, mlc, slc
SanDisk has done something interesting with their new Extreme II SSD series, they have used both SLC and MLC flash in the drive to attempt to give users the best of both worlds. The drive still has a DDR cache sitting between the flash storage and the controller, but there is an nCache between the MLC flash and the DDR comprised of ~1GB of SLC flash. The idea is that the SLC can quickly accumulate a number of small writes into a larger single write block which can then be passed to the MLC flash for storage. Don't think of it as a traditional cache in which entire programs are stored for quick access but more as a write buffer which fills up and then passes its self to the long term storage media once it is full. The Tech Report put this drive through their tests and found it to be a great all around performer, not the fastest nor the best value but very good in almost any usage scenario.
"With MLC main storage and an SLC flash cache, the SanDisk Extreme II is unlike any other SSD we've encountered. We explore the drive's unique design and see whether it can keep up with the fastest SSDs on the market."
Here are some more Storage reviews from around the web:
- Corsair Neutron GTX 240GB SSD RAID 0 Performance @ Legit Reviews
- SanDisk Extreme II @ SSD Review
- OCZ Vector 256GB @ LanOC Reviews
- Silicon Power Velox V55 240GB SSD @ NikKTech
- Western Digital Se 4TB Review @ TechwareLabs
- Seagate Laptop Thin SSHD 500 GB HDD Review @ Hardware Secrets
- Seagate Desktop HDD.15 4TB / Barracuda XT 4TB @ Hardware.info
- Western Digital SE 4TB Hard Drive @ hardCOREware
- Toshiba Nearline MG03ACA400 4TB SATA III HDD @ NikKTech
- Western Digital Sentinel DX4000 16TB RAID5 4-Bay NAS @ eTeknix
- Icy Box IB-WF200HD @ Rbmods
- Sandisk Extreme microSDXC UHS-I 64GB Memory Card Review @ Legit Reviews
- Patriot SuperSonic Mini 16GB USB 3.0 Flash Drive @ NikKTech
- 49 SD and MicroSD cards tested: there's a difference @ Hardware.info
- Mach Xtreme MX-FX 32GB USB 3.0 Flash Drive @ NikKTech
Subject: Storage | June 7, 2013 - 06:38 PM | Jeremy Hellstrom
Tagged: sandisk, Extreme II series, marvell 9187, 19nm, mlc
SanDisk claims their Extreme II can run at 550/510 MB/s sequential read/write, and 95,000/78,000 for random read/write IOPS, a claim which [H]ard|OCP just put to the test. The two major changes to this drive that will contribute to the difference in speed are the switch from a Sandforce controller to the Marvell 9187 controller and the MLC flash which is 19nm in this drive. Testing shows that the drive does live up to expectations though they did point out the lack of encryption as a weakness. Prices for the drives are around the magic $1/GB mark, making this drive a solid contender in a very populous market.
"SanDisk releases its Extreme II series SSD, which features the Marvell 9187 controller in concert with 19nm eX2 ABL MLC NAND. The competition is heating up as another manufacturer with massive foundry capabilities releases a new SSD. Will the Extreme II "blaze through your day" and "keep you ahead of deadlines?"
Here are some more Storage reviews from around the web:
- SanDisk Extreme II Series 120GB, 240GB and 480GB SSD Review @ Legit Reviews
- Seagate 600 240GB SATA III 6Gbps SSD Review @ Legit Reviews
- OCZ Vertex 3.20 240GB SSD Review @ HiTech Legion
- Crucial M500 480GB SSD Review @ Hardware Canucks
- LSI SandForce Next Gen SSD Controller With 1800MB/s Speeds Discovered at Computex @ SSD Review
- Seagate's 600 SSD solid-state drive @ The Tech Report
- KingFast E-Drive KF2510SCF 120GB 2.5" SATA 3 SLC SSD Review @ ModSynergy
- KingFast E-Drive 2.5'' SATAIII SLC 120GB SSD Review @ Madshrimps
- OCZ Vertex 3.20 240GB SSD review: Vertex 3 with 20nm flash @ Hardware.info
- ADATA DashDrive Elite UE700 64GB USB 3.0 Flash Drive @ eTeknix
- Zalman U3M32 32GB SLC USB 3.0 Flash Drive @ Funkykit
- Seagate's Desktop HDD.15 4TB hard drive @ The Tech Report
- Seagate Constellation ES 1TB Hard Drive Review @ PCSTATS
- Adaptec (by PMC) ASR-72405 RAID Controller (X2) Review - 1M IOPS & 12GB/s Thru 24 SMART Optimus SSDs @ SSD Review
- Vantec NexStar WiFi Hard Drive Dock Review @ Legit Reviews
- ioSafe N2 NAS / RAID Storage Solution Review @ OCIA
- Synology DS713+ NAS @ TechwareLabs
- QNAP TurboNAS TS-221 NAS Server @ NikKTech
- Infortrend EonNAS Pro 510 Review @ TechwareLabs
Subject: Storage | May 28, 2013 - 01:47 PM | Jeremy Hellstrom
Tagged: ssd, crucial m500, mlc, marvell 9187, RAIN
Before discussing the impressive price point of Crucial's M500 drive their are two features worth mentioning about this drive, RAIN and the Marvell 9187 controller. RAIN is Redundant Array of Independent NAND which offers data parity which will allow you to successfully recreate data after an uncorrectable error, something which might put the minds of those still leery of SSDs to rest. The new Marvell controller is the secret to the pricing of this drive, it allows the usage of 128Gbit (16GB) NAND dies as opposed to the more common 64GBit dies and is produced at a lower cost than other controllers. [H]ard|OCP tested the 512GB drive and does warn that the specifications of the two smaller capacity drives are different enough to require individual testing. However as you can pick up the 512GB drive for $400 you might simply opt for the largest drive which offers competitive performance at an amazing $0.78/GB.
"Crucial's M500 offers the lowest price per gigabyte for an MLC SSD with enterprise-class features not seen on typical consumer SSD data drives. With new 128Gbit MLC NAND paired with the Marvell 9187 controller the M500 should deliver great performance at a historically low price point. Is the Crucial M500's performance up to par?"
Here are some more Storage reviews from around the web:
- 240GB OCZ Vertex 3.20 Solid State Drive @ Benchmark Reviews
- OCZ Vertex 3.20 120GB SSD Review @ Techgage
- Solidata K8 1920E SSD Review - SandForce Driven and an Amazing 2TB Capacity @ SSD Review
- OCZ Vertex 3.20 Solid State Drive @ X-bit Labs
- OCZ Vertex 3.20 240GB SATA III 2.5'' SSD Review @ Madshrimps
- OCZ Vertex 450 256GB SSD Review @ Legit Reviews
- OCZ Vertex 450 SSD @ Techspot
- OCZ Vertex 450 @ Hardware.info
- OCZ Vertex 450 SSD @ SSD Review
- OCZ Vertex 450 256GB @ Tweaktown
- SanDisk Ultra Plus 256GB SSD @ eTekinx
- Samsung SSD 840 comparison @ Hardwareoverclock
- Seagate 600 Pro SSD @ SSD Review
- Crucial M500 480GB SSD @ eTeknix
- Bang for Your Buck: Best 256GB Class SSD's under $200 @ Tweaktown
- OCZ Vertex 3.20 240GB Solid State Drive Review @ OCIA.net
- Kingston SSDNow E100 Enterprise SSD @ Tweaktown
- Mushkin Chronos GO Deluxe 1.8″ SATA 3 SSD Review ? Lightning Speeds Ultrathin Design @ SSD Review
- HGST Travelstar 7K1000 1TB 2.5" Hard Drive @ Tweaktown
- 4TB Seagate Desktop HDD ST4000DM000 @ Benchmark Reviews
- WD Se 4TB Enterprise Hard Drive Review @ Techgage
- Western Digital Scorpio Blue (WD5000LPVT) 500GB HDD @ Tweaktown
- Seagate Laptop Thin SSHD 500GB review: 2.5-inch hard disk with SSD cache @ Hardware.info
- Seagate Desktop HDD.15 4TB Hard Drive Review @ Hardware Canucks
- ADATA DashDrive Elite UE700 USB 3.0 Flash Drive @ Tweaktown
- Kingston DT Workspace 64GB 'Windows To Go' USB 3.0 Flash Drive @ Tweaktown
- Adata DashDrive Elite UE700 32GB Flash Drive Review @ Ninjalane
- Kingston HyperX Predator 512GB @ Hardware.info
- 32 32/64GB USB 3.0 memory stick test: lots of differences @ Hardware.info
- Patriot Supersonic Magnum Flash Drive @ Benchmark Reviews
- Lexar Professional 128GB Compact Flash Memory Card @ Tweaktown
- Transcend 32GB Wi-Fi SDHC @ Tweaktown
- Kingston 64GB microSDXC SDCX10/64GB @ Bjorn3D
- WD My Passport Ultra 1TB Portable Storage Drive Review @ Legit Reviews
- ADATA DashDrive Air AE400 Wireless Storage Reader and Power Bank Review @ Madshrimps
- Rosewill RDEE-12002 USB 3.0 Hard Drive Enclosure @ techPowerUp
- Corsair Voyager Air 500GB Wireless Storage Device @ Tweaktown
- Transcend StoreJet Cloud 32GB Wireless Storage Device @ Tweaktown
- Kingston MobileLite Wireless Review @ Pro-Clockers
- Synology DS213j review: deluxe entry-level NAS @ Hardware.info
- Icy Dock FlexCage MB975SP-B 5x3.5" in 3x5.25" HDD Cage Review @ Hi Tech Legion
- Shuttle OMNINAS KD20 @ techPowerUp
- iStarUSA BPU-340SATA Military Grade Drive Enclosure @ NikKTech
- LaCie CloudBox 1TB Personal NAS @ Tweaktown