Subject: Storage | January 23, 2019 - 05:35 PM | Jeremy Hellstrom
Tagged: TRRUST-Stor VPX RT, ssd, slc, radiation, amusing
Mercury Systems are well known for providing military grade secure storage, which means a little more than a truck commercial, but is still just FIPS 197 which is also know as AES. Mercury uses AES-256 but both AES-128 and AES-192 can be classified as FIPS 197.
The security of the drive above is not what makes it worth mentioning however, it is the fact it is rated for use in low earth orbit which is interesting. The drive is as Al says, "a bunch of SLC in a poly filled enclosure", with the poly offering the following (PDF link):
- Rad-Tolerant Design (RTG4 Based): Configuration upsets immunity to LET > 103 MeV.cm2/mg
- Single-event latch-up (SEL) immunity to LET > 103 MeV.cm2/mg
- Registers SEU rate <10-12 errors/bit-day (GEO Solar Min)
- Single-event transient (SET) upset rate < 10-8 errors/bit-day (GEO Solar Min)
- Total ionizing dose (TID) > 100 Krad
The 440GB of SLC flash is capable of reading and writing at 1GB/s with a 26 PB write minimum life expectancy. If you are serious about long term resilient storage, and can afford paying governmental rates you could drop them a line to get on the waiting list.
Conversely, the next time you are playing a post apocalyptic RPG, you are now fully able to complain about the crappy storage media the game provides and demand something a little bit better. It won't be quite as easy to hack into as a RobCo terminal but if you can get at the data those logs will load a whole lot faster.
Once we saw Intel launch QLC flash installed in their recent 660p M.2 part, I had a feeling that Micron would not be far behind, and that feeling has been confirmed with the launch of the Crucial P1 M.2 SSDs:
Both the 500GB and 1TB models are single sided. The 2TB (not yet released) will likely have packages installed at the rear.
No surprises with the packaging. Does the job just fine.
Specs are also reasonably standard for an NVMe SSD at this point, though we do see a bit more of a falloff at the lower capacities here. This is partially due to the use of QLC flash, even though these specs are likely assuming full use of the available SLC cache. Since QLC allows for higher capacity per die, that translates to fewer dies for a given SSD total capacity, which lowers overall performance even at SLC speeds. This is a common trait/tradeoff for the use of higher capacity dies.
Subject: Storage | November 27, 2018 - 06:54 PM | Jeremy Hellstrom
Tagged: ssd, slc, sata, Samsung, QLC, 860 QVO, 2.5
Samsung have jumped up the alphabet, going from EVO to QVO with their new lower cost QLC based SSD family. The 4TB model Allyn reviewed sells for $600, not bad for a drive of that size but still a little pricey for some. A more affordable option can be seen at The Tech Report, the 1TB drive they reviewed sells for $150. If you are on a somewhat limited budget and don't mind a small hit in performance nor a three year warranty or 360TB written endurance then this drive is worth a look.
Samsung's EVO drives have ruled the SATA roost for the last several years. Today, Samsung is introducing high-capacity, lower-cost 860 QVO drives with four-bit-per-cell QLC NAND inside. Can they live up to the high expectations Samsung has set with its past products?"
Here are some more Storage reviews from around the web:
- Samsung 860 QVO 2TB SSD @ Guru of 3D
- Samsung 860 QVO SSD Review – 1TB/2TB Drives Tested @ Legit Reviews
- MyDigitalSSD BPX Pro SSD Benchmarked With Firmware v12.1 @ Legit Reviews
- Mushkin SOURCE 250GB SSD Review @ NikKTech
- HyperX Fury RGB 480GB SSD Review @ Hardware Asylum
- Corsair Force MP510 960GB @ Kitguru
- TEAMGROUP T-FORCE DELTA R Rainbow RGB 250GB SSD Review @ NikKTech
Samsung has opted to name this new product 'QVO'. The Q presumably stems from the use QLC flash, which can store four bits per cell.
While QLC writes are far slower than what we are used to seeing from a modern SSD, SLC caching is the answer to bridging that performance gap. The 860 QVO employs Samsung's Intelligent TurboWrite, which has a minimum 6GB static cache plus a dynamic cache of up to 72GB. This dynamic cache varies based on available QLC area which can be reconfigured to operate in SLC mode. Do note the 'After TubroWrite' speeds of 80 and 160 MB/s - that's the raw QLC speeds that you will see if the cache has been exhausted during an extended write period.
The rest of the specs are about what we expect from a SATA SSD, but I do have a concern with those QD1 4KB random read ratings of only 7,500 IOPS. This is on the low side especially for Samsung, who typically dominate in low QD random read performance.
Introduction, Specifications and Packaging
Samsung launched their 850 line of SSDs in mid-2014 (over three years ago now). The line evolved significantly over time, with the additions of PRO and EVO models, capacity expansions reaching up to 4TB, and a later silent migration to 64-layer V-NAND. Samsung certainly got their money's worth out of the 850 name, but it is now time to move onto something newer:
Of note above is a significantly higher endurance rating as compared to the 850 Series products, along with an update to a new 'MJX' controller, which accounts for a slight performance bump across the board. Not mentioned here is the addition of queued TRIM, which is more of a carryover from the enterprise / Linux systems (Windows 10 does not queue its TRIM commands).
Aside from some updated specs and the new name, packaging remains very much the same.
Read on for our review of the Samsung 860 PRO and EVO SSDs (in multiple capacities!)
(Those of you interested in Samsung's press release for this launch will find it after the break)
Subject: Storage, Shows and Expos | January 10, 2018 - 07:38 PM | Allyn Malventano
Tagged: tlc, ssd, slc, sata, nand, MX500, DWA, crucial, CES 2018, CES, 3d nand
Crucial showed off the upcoming M.2 variant of its MX500 product, available in capacities up to 1TB. They also announced (press release after the break) that the MX500 will be available from 250GB up to 2TB capacities.
Here is Crucial's product tour video for the MX500:
We previously tested the 1TB MX500, and Crucial passed along a 500GB model that I was able to spot check to ensure there was no performance fall-off at the smaller capacities of this line:
Looks good so far, and nearly identical to the 1TB capacity across our entire test suite. We did also speak with Crucial reps (Jon and Jon) about the TRIM speed issues noted in our previous review. They are looking into replicating our testing and may be pushing out a firmware to help improve this metric moving forward.
We also saw some sweet looking new RGB Ballistix memory, due out shortly. More to follow there! Crucial's MX500 CES announcement appears after the break.
Subject: Storage | November 20, 2017 - 10:56 PM | Allyn Malventano
Tagged: Z-NAND, SZ985, slc, Samsung, P4800X, nand, Intel, flash
We haven't heard much about Samsung's 'XPoint Killer' Z-NAND since Flash Memory Summit 2017, but now we have a bit more to go on:
Yes, actual specs. In print. Not bad either, considering the Samsung SZ985 appears to offer a bus-saturating 3.2GB/s for reads and writes. The 30 DWPD figure matches Intel's P4800X, which is impressive given Samsung's part operates on flash derived from their V-NAND line (but operating in a different mode). The most important figures here are latency, so let's focus there for a bit:
While the SZ985 runs at ~1/3rd the latency of Samsung's own NAND SSDs, it has roughly double the latency of the P4800X. For the moment that is actually not as bad as it seems as it takes a fair amount of platform optimization to see the full performance benefits of optane, and operating slightly higher on the latency spectrum helps negate the negative impacts of incorrectly optimized platforms:
Source: Shrout Research
As you can see above, operating at slightly higher latencies, while netting lower overall performance, does lessen the sting of platform induced IRQ latency penalties.
Now to discuss costs. While we don't have any hard figures, we do have the above slide from FMS 2017, where Samsung stressed that they are trying to get the costs of Z-NAND down while keeping latencies as low as possible.
Image Source: ExtremeTech
Samsung backed up their performance claims with a Technology Brief (available here), which showed decent performance gains and cited use cases paralleling those we've seen used by Intel. The takeaway here is that Samsung *may* be able to compete with the Intel P4800X in a similar performance bracket - not matching the performance but perhaps beating it on cost. The big gotcha is that we have yet to see a single Samsung NVMe Enterprise SSD come through our labs for testing, or anywhere on the market for that matter, so take these sorts of announcements with a grain of salt until we see these products gain broader adoption/distribution.
Subject: Storage | August 2, 2017 - 06:21 PM | Allyn Malventano
Tagged: BiCS3, western digital, wdc, WD, tlc, slc, QLC, nand, mlc, flash, 96GB, 768Gb, 3d
A month ago, WD and Toshiba each put out releases related to their BiCS 3D Flash memory. WD announced 96 layers (BiCS4) as their next capacity node, while Toshiba announced them reliably storing four bits per cell (QLC).
WD recently did their own press release related to QLC, partially mirroring Toshiba's announcement, but this one had some additional details on capacity per die, as well as stating their associated technology name used for these shifts. TLC was referred to as "X3", and "X4" is the name for their QLC tech as applied to BiCS. The WD release stated that X4 tech, applied to BiCS3, yields 768Gbit (96GB) per die vs. 512Gbit (64GB) per die for X3 (TLC). Bear in mind that while the release (and the math) states this is a 50% increase, moving from TLC to QLC with the same number of cells does only yields a 33% increase, meaning X4 BiCS3 dies need to have additional cells (and footprint) to add that extra 17%.
The release ends by hinting at X4 being applied to BiCS4 in the future, which is definitely exciting. Merging the two recently announced technologies would yield a theoretical 96-layer BiCS4 die, using X4 QLC technology, yielding 1152 Gbit (144GB) per die. A 16 die stack of which would come to 2,304 GB (1.5x the previously stated 1.5TB figure). The 2304 figure might appear incorrect but consider that we are multiplying two 'odd' capacities together (768 Gbit (1.5x512Gbit for TLC) and 96 layers (1.5x64 for X3).
Press blast appears after the break.
Subject: Storage | February 14, 2017 - 06:51 PM | Jeremy Hellstrom
Tagged: tlc, slc, MX300, micron, imft, Dynamic Write Acceleration, DWA, crucial, 3DNAND, 3d nand
Last June Al took a look at the Crucial MX300 750GB and its ability to switch its cache dynamically from TLC to SLC, helping Crucial improve how they implemented this feature along the way. It proved to be a great value for the money; not the best performing drive but among the least expensive on the market. Crucial has since expanded the lineup and Hardware Canucks took a look at the 2TB model. This model has more than just a larger pool of NAND, the RAM cache has been doubled up to 1GB and the dynamic cache has more space to work in as well. Take a look at this economy sized drive in their full review.
"Crucial's newest MX300 series continues to roll on with a new 2TB version. This SSD may be one of the best when it comes to performance, price and capacity all combined into one package."
Here are some more Storage reviews from around the web:
- Crucial MX300 525GB SSD Review @ Neoseeker
- Silicon Power S57 240GB @ eTeknix
- Silicon Power S56 240GB @ eTeknix
- Transcend ESD400 256GB External SSD @ Kitguru
- QNAP TurboNAS TS-1635-8G 16-bay 10GbE NAS Server Review @ NikKTech
- Drobo 5c 5-Bay USB Type-C Self-Managing DAS @ eTeknix
Subject: Storage | December 19, 2016 - 02:49 PM | Jeremy Hellstrom
Tagged: TurboWrite, tlc, SSD 750, slc, sata, Samsung, planar, 750, 2d
With current prices of $61 for 120GB, $89 for the 250GB and $140 for the 500GB model, anyone still stuck using spinning rust for their main drive can join the flash revolution. Al reviewed these drives at the beginning of the year and there have been so many new drives this year you may have forgotten about it. It is not the highest tech drive on the market, with 2D NAND and a SATA interface, which is also why they are so inexpensive. Kitguru recently wrapped up a review of the drives and the Magician software which comes with it.
"The one thing that was missing from Samsung’s range of SSD’s was a low price value oriented drive. This has been rectified by the arrival of the SSD750 EVO product line. To keep production costs and therefore the cost of the drive down, Samsung has forsaken the 3D V-NAND of the last few drive ranges and gone back to 2D Planer NAND."
Here are some more Storage reviews from around the web:
- Crucial MX300 525GB SSD Review @ NikKTech
- A Year With NVMe RAID 0 in a Real World Setup @ eTeknix
- Promise Technology Apollo Cloud 4TB NAS Review @ NikKTech
- Synology DS416j Surveillance Bundle @ techPowerUp