Subject: Storage | September 22, 2015 - 06:10 PM | Allyn Malventano
During yesterday's SSD Summit, obscured by their 950 PRO launch was new branding for their 32 (and now 48) layer Vertical NAND technology:
This new branding is more in line with what folks were calling their NAND anyway (Samsung was previously using the term '3D VNAND'. Dropping the 3D made sense, as it was implied with the 'V').
Also of interest were some announcements of upcoming higher capacities of their existing models:
4TB 850 EVO and PRO? Yes please.
1TB in the 850 EVO M.2 edition, and while there is no slide for this, the 950 PRO is also expected to be updated with a 1TB model within the same time frame as well.
How is all of this expansion possible? The answer is their third generation V-NAND, which is 48 layers and 256 GBit (32 GB) capacity per die. Samsung intends to roll this flash out and update all model lines currently using V-NAND technology. This decision was made by Samsung's Senior VP of Marketing, UnSoo Kim:
...now before you get out the pitchforks and form up the 'don't change the flash without a new model' lynch mob, I'd like to point out a few things that make this change different than what you might have seen in the past.
- Samsung is trying to prevent confusion by adding product lines with nearly identical specs.
- Samsung is being very open about this change (others were secretive / deceptive).
- Samsung has promised that they will only implement this change in a way that *increases* the performance and *decreases* the power consumption of these products.
I did leave the Q+A with some further questions about this change. The lower capacities of the 850 EVO still see slower write performance when writing straight to TLC flash (SLC cache is full). This is because there are fewer dies available to write the data, and each die can only write so fast in TLC mode. Since the 48-layer V-NAND is to have double the capacity per die, that would mean half the dies per SSD and possibly slower write speeds in the overall product.
I approached UnSoo Kim after the Q+A and asked this specific question, and his answer was both interesting and refreshing. First, he understood my question immediately and assured me that they will not roll out 256Gbit 48-layer V-NAND into their smaller capacity models - in order to prevent any performance reduction over their current 32-layer equipped parts. Second, he told me that they also intend to produce a 128Gbit variant of 48-layer V-NAND at some point in the future, and use *that* part to substitute the 128Gbit 32-layer V-NAND in those smaller capacity models, keeping the die counts (and therefore sequential write speeds) equal. That additional variant of their third generation V-NAND is the only way (in my mind) that they could update their smaller capacity parts without losing performance, and it was great to see that Samsung has thought out the execution of this rollout in such a proper manner.
Subject: Storage | September 22, 2015 - 02:39 AM | Allyn Malventano
Samsung’s new product launching will be called the 950 PRO. This will be an M.2 2280 form factor product running at PCIe 3.0 x4. Equipped with Samsung’s 32-layer V-NAND and using the NVMe protocol enabled by a new UBX controller, the 950 PRO will be capable of up to an impressive 300,000 random read IOPS. Random writes come in at 110,000 IOPS and sequential throughputs are expected to be 2.5 GB/sec reads and 1.5 GB/sec for writes. Available capacities will be 256GB and 512GB.
- 256GB - $199.99 ($0.78/GB)
- 512GB - $349.99 ($0.68/GB)
- 1TB - (early next year with the switch to 48-layer V-NAND)
The 950 PRO will be shipping with a 5-year warranty rated at 200 terabytes written for the 256GB model and 400 TBW for the 512GB. That works out to just over 100GB per day for both capacities.
These hit retail in October and we currently have samples in hand for testing.
(for those curious, both capacities only have components on the front side of the PCB)
Subject: Storage | July 7, 2014 - 03:58 PM | Jeremy Hellstrom
As you saw in Al's review, the Samsung 850 drive is more than just a small bump in model number and performance, it is the stellar introduction to 3D NAND. The Tech Report is likely having nightmares from the drives reported longevity which is expected to be up to 10 times the cycles of current drives and means an update to their long running endurance test could see them testing into the 2020's. While they haven't yet added the 850 to that particular test they did post a review which starts out with a comprehensive look at the history of Flash technology and why 3D NAND is faster and more resilient than previous types; read on to get a better understanding of the fastest consumer SATA drive on the market.
"Most flash memory is limited to a single layer, but the V-NAND chips in Samsung's new 850 Pro SSD stack 32 layers on top of each other. This is next-level stuff, literally, and it's supposed to make the 850 Pro the fastest SATA drive around. We investigate."
Here are some more Storage reviews from around the web:
- Samsung SSD 850 PRO @ Benchmark Reviews
- Samsung SSD 850 Pro @ Legion Hardware
- Samsung 850 PRO 512GB SATA SSD @ Custom PC Review
- Samsung 850 Pro 1TB SSD Review @ Legit Reviews
- Samsung 850 Pro SSD Review - Showing Off With 3D V-NAND @ The SSD Review
- Samsung 845DC EVO 240GB SSD Review @ NikKTech
- Samsung 845DC EVO 240GB, 960GB SATA SSD @ Custom PC Review
- Crucial MX100 512GB SSD Review @ NikKTech
- OCZ RevoDrive 350 480 GB Review @ OCC
- OCZ RevoDrive 350 480GB PCIe SSD @ Custom PC Review
- ADATA XPG SX300 SATA 6Gb/s mSATA SSD Review @ Modders-Inc
- Seagate Laptop SSHD 1 TB Solid State Hybrid Drive @ TechARP
- Synology DS414slim 4-Bay NAS @ eTeknix
- OWC ThunderBay 4 RAID5 Edition Review - Speed, Capacity and Data Security @ The SSD Review
- Samsung Pro microSDXC UHS-1 U1 Card @ The SSD Review
July 1, 2014 - 09:53 PM | Allyn Malventano
Here are some goodies from yesterdays briefings at the 2014 Samsung SSD Summit:
Slides from the 3D V-NAND discussion. These provide some additional visuals for what I explained in the intro to the 850 PRO series SSD review:
Next we got into current launching lineups. First the 850 PRO that launched today:
Samsung also launched an 845DC PRO, which uses the previous generation 24-layer V-NAND:
Finally, as we walked out of the conference, we saw a 32-layer V-NAND wafer on display:
Taking die pictures is tricky...
...but persistence is rewarded:
More to follow!
Samsung has certainly been pushing the envelope in the SSD field. For the past two years straight, they have launched class leading storage products, frequently showing outside-the-box thinking. Their 840 PRO series was an impressive MLC performer to say the least, but even more impressive was the 840 EVO, which combined cost-efficient TLC flash with a super-fast SLC cache. The generous SLC area, present on each die and distributed amongst all flash chips within the drive, enabled the EVO to maintain PRO-level performance for the majority of typical consumer (and even power user) usage scenarios. The main win for the EVO was the fact that it could be produced at a much lower cost, and since its release, we've seen the EVO spearheading the push to lower cost SSDs.
All of these innovations might make you wonder what could possibly be next. Today I have that answer:
If you're going "Hey, they just changed the label from 840 to 850!", well, think again. This SSD might have the same MEX controller as its predecessor, but Samsung has done some significant overhauling of the flash memory itself. Allow me to demonstrate.
Here's standard (2D) flash memory, where the charge is stored on a horizontal plane:
..and now for 3D:
The charges (bits) are not stored at the top layer. They are stored within all of those smaller, thinner layers below it. You're still looking at a 2D plane (your display), so here's a better view:
Subject: General Tech | August 22, 2013 - 02:54 PM | Ken Addison
PC Perspective Podcast #265 - 08/22/2013
Join us this week as we discuss the XSPC GTX 680 Waterblock, ASUS's DirectCU II Refresh, V-NAND SSDs and more!
The URL for the podcast is: http://pcper.com/podcast - Share with your friends!
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Hosts: Ryan Shrout, Jeremy Hellstrom, Josh Walrath, and Allyn Malventano
Program length: 1:17:41
Week in Review:
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Hardware/Software Picks of the Week:
1-888-38-PCPER or firstname.lastname@example.org
*Due to upload issues on YouTube's side today, the video may take substantially longer than usual to be available