Western Digital Blue 2.5" 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T2B0A

Pros: A lot of reviewers have already posted performance specs (e.g., random read/write, sequential read/write, 512, 4K, random, etc.) so I'm not going to rehash all of that except to affirm WD's stated claims of 550MB/s read and 525MB/s write. It's difficult to differentiate offerings like SSDs for a lot of technical reasons and difficult to validate "marketing". It's not like I can reverse engineer the firmware to corroborate how wear-leveling and ECC actually takes place vs a competitor's product. That said, it uses some pretty dense NAND technology, 3D/TLC meaning the cells have 3-layers and at stacked to increase capacity volumetrically vs widening the footprint. While this enables increased capacities, there are some tradeoffs discussed in the cons. However, if you’re an average consumer and you’ll be using this in conjunction with a backup device (as everyone should) this is an excellent choice of high-performing storage at a solid price. If you need more capacity, consider some of the larger capacities. All of the above is largely true of all products in this consumer category and price point. The differentiator is this product carries the Western Digital name and reputation and leverages their acquisition of SanDisk, a leader in NAND flash memory technology. So, buy with confidence in their reputation as industry leaders.

Cons: As noted above, to increase capacity this disk uses 3D TLC NAND, but with a major drawback that the technology inherently shortens the number of write cycles available for the cell over MLC and SLC NAND to about 5,000 before failure at the cell level compared to about 100,000 cycles for SLC and 10,000 for MLC. Still, I’ve never had a single MLC or TLC drive fail in 7 years. So the odds are remote that you’ll see a failure under normal consumer usage for 7-14 years. That said, it is something you’ll want to be aware of. However, know that this problem is consistent for all manufacturers using TLC NAND. This is why warranty is so important. Western Digital offers it’s typical 3-year warranty for it’s Blue line for this drive, which is fairly risk averse from their perspective. Under strenuous write cycles the disk should last at least 3.5 years. The warranty only covers up to 3 — one might infer that they’re only covering the bare minimum for this drive and don’t consider longevity to be a key differentiator. That said, this warranty is pretty standard across the industry. It’s important to note that the mean time before failure is 1.75 million hours, which is just shy of 200 years. That doesn’t mean your drive will last 200 years, it just means that, on average, there’s an estimated 1 failure resulting in total device downtime in 1.75 million hours of usage. Obviously, cells may failure sooner, but the disk as a whole should continue functioning, holistically, for much longer, and the now ubiquitous wear-leveling technology should mitigate the risk of short cell life.

Overall Review: WD acquired SanDisk in 2016. SanDisk is a leading manufacturer of memory technologies so this offering from WD is expected to leverage their deep knowledge base. I think you can certainly buy with confidence, and I still enthusiastically recommend, just make sure you're indeed buying this for consumer purposes and be cognizant of the degree of write cycles your usage requires so you're not caught unaware. Again, I've never personally had an SSD failure in 7 years and I'd consider myself an average user with moderate write cycles in my normal usage. I also don't believe WD would put their reputation on the line for a series of SSDs that underperformed. So, buy with confidence and plan accordingly.

Pros: WHY THIS IS SIGNIFICANT First consumer 2TB sized SATA SSD with 3D BiCS NAND. The 3D TLC NAND is truly high-performance and can undergo sustained write activity. (Planar 2D NAND usually requires a SLC buffer and the write activity tanks after a couple seconds when the buffer is filled.) PERFORMANCE Performance is so good that it saturates the SATA 6Gbps interface. It uses the Marvell 88SS1074 4-channel controller with low-density parity check (LDPC) error correction. ENDURANCE No worries about early adoption of brand new technology with TLC NAND because it is backed by a 3 year warranty. The 2TB SSD has a 500 TBW rating. Most consumers only write about 10 GB data per day after initial system setup. SOFTWARE Free software for Dashboard and Acronis True Image for cloning and maintenance. Dashboard offers live disk performance monitoring. PRICE This drive is cost-competitive for its size/speed. Main competition would be the Samsung product which is pricier.

Cons: I cannot find out if this is uses the 512Gb or the 256Gb NAND dies without cracking the 2.5”/7mm case. Dashboard software doesn’t work across both WD and Sandisk product families even though they are both the same company now. Be careful when ordering to order the newest product since the older WD Blue SSD (without 3D NAND) is still out there for sale.

Overall Review: COMPANY HISTORY AND BRANDING A little history: WD bought SanDisk for about 19 billion last year. Sandisk’s manufacturing partner is Toshiba. Together, Toshiba and Sandisk ramped up 3D NAND production for the mobile device market and 3D BiCS NAND has been shipping for about a year. The third revision which is 64-layers high is what is being used in this SSD - which is essentially the same as the Sandisk Ultra 3D SSD product. This WD Blue brand is aimed at system builders and resellers while the Sandisk brand is aimed at brick and mortar stores and end-users looking for upgrades. NAND, 3D NAND, and BiCS There are three main types of NAND flash. Single-level cell (SLC): 1 bit per cell (on or off); Multi-level cell (MLC): 2 bits per cell; Triple-level cell (TLC) 3 bits per cell. Endurance usually goes down with more bits per cell. Putting the cells on a sheet is 2D NAND. 2D NAND (also called planar or single-layer NAND) has encountered challenges in achieving higher densities due to cell-to-cell interference as the cells got smaller and closer together.. 3D NAND has multiple layers of cells allowing for higher capacity in a smaller space. This also results in reduced power consumption and higher data write performance. Samsung was first to produce 3D NAND and called it V-NAND. WD/Sandisk partnership with Toshiba calls it BiCS (Bit Cost Scaling). 3D NAND generally uses MLC or TLC flash. BiCS uses TLC. Only this year did Toshiba start delivering 512Gb chips. Last year was limited to 256Gb chips. Their latest chips have 64 layers. NAND PRICE The 3D NAND market has for the most part been completely gobbled up by the cell phone manufacturers. Most manufacturers are spending a lot on converting fabrication plants to 3D NAND so the hope is that prices will drop soon but with Apple stocking up on components for the new iPhone, NAND prices are expected to remain high through the rest of the year. This drive is cost-competitive as of my writing.

Pros: Much better performance compared to the previous Blue SSD drives

Cons: Random 4K reads are weak, hopefully this is something with firmware that can be addressed in the future.

Overall Review: This review is for the WD Blue SSD 500GB model WDS500G2BOA. This is a 2.5 inch form factor drive. For this review it's running firmware X61130WD. This drive surprised me from the get go. I own and use 16 SSDs in my home PCs. These drives come from a variety of Vendors and sizes 128GB-1TB...and includes WD, Samsung, Mushkin, Sandisk, Kingston, etc. While all have performed well the Samsung EVO line has always been my gold standard for main stream SSD(with the pro for more high end 2.5 inch). The price and performance for the EVO line was unmatched for years. In the past year competitors have been producing drives that encroach in the territory. This WD blue is one of them. While it doesn't beat the EVO in every category it's performance is compelling. For the purpose of comparison I'll compared the WDS500G2BOA vs the other 2 SSDs in the test rig. The test rig is running Windows 10 x64 Pro i7-6700k, 16GB ram, using a Gigabyte Z170x-UD5 TH-CF motherboard The competing drives are of course the WDS500G2BOA (firmware X61130WD)vs the Samsung 850 EVO 500GB (firmware EMT02B6Q) vs Mushkin ECO3 480G (firmware 01126A) Scores in UserBench were as follows In sequential read/writes WD Read 516 Write 504 Mixed 505 SS EVO. Read 520 Write 408 Mixed 418 ECO3. Read 494 Write 254 Mixed 272 Random 4K WD. Read 32.1 Write 65.7 Mixed 31.6 SS. Read 47.4 Write 100 Mixed 41.4 Eco3. Read 37.1. Write 63.7 Mixed 17 Deep Queue 4K WD. read 361 Write 343 Mixed 16.8 SS. Read 355 Write 280 Mixed 27.6 ECO3. Read 37.1 Write 66.9 Mixed 46.2 In AS SSD Benchmark set to 1GB (please bear in mind benchs can fluctuate as much as 1-3% depending on the run) WD. READ. Write Seq: 479.93. 495.73 4K. 32.23 69.00 4K-64. 371.59. 324.50 AccTime. .058ms. .101ms Score. 452. 443 Overall. 1138 SS Seq. 513.75. 503.24 4K. 46.95. 125.21 4k-64. 378.34. 324.85 AccTime. .038ms. .025ms Score. 477. 500 Overall. 1238 ECO3 Seq 525.01 464.33 4k. 32.09. 115.53 4k-64. 192.15. 331.40 AccTime. 0.033ms. .031ms Score. 277. 493 Overall. 921 While I wish I could compared the WD to all my SSDs I'm time/space are limited here. As can be seen the current weak spot of the new WD blue is it 4k performance aka smaller files. Being a newer drive time will tell if Western Digital can improve this area with a firmware update. As far as benchmarks go results can vary depending on which program you use to test. Overall I am impressed, and at the time of this review there's been no firmware updates yet. If WD can improve the weaker 4k results this drive can become a great seller and that would change my review from a 4 EGG to 5 EGG review

Pros: * No SATA or Power cable needed. * 3D Nand technology * 5xx Read/Write speeds * 3 year warranty * Acronis True Image WD Edition (download from WD site, 405MB file) * Data LifeGuard Diagnostics for Windows (download from WD site) * MTTF 72,916.6 days or 199.77 years on a 24/7 operation. Performance is up to its specifications: CrystalDiskMark 5.2.2 x64 (C) 2007-2017 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s] * KB = 1000 bytes, KiB = 1024 bytes Sequential Read (Q= 32,T= 1) : 562.430 MB/s Sequential Write (Q= 32,T= 1) : 532.212 MB/s Random Read 4KiB (Q= 32,T= 1) : 325.923 MB/s [ 79571.0 IOPS] Random Write 4KiB (Q= 32,T= 1) : 350.941 MB/s [ 85679.0 IOPS] Sequential Read (T= 1) : 507.977 MB/s Sequential Write (T= 1) : 488.387 MB/s Random Read 4KiB (Q= 1,T= 1) : 37.668 MB/s [ 8003.6 IOPS] Random Write 4KiB (Q= 1,T= 1) : 128.542 MB/s [ 27322.5 IOPS] Date : 2017/09/03 7:53:18 OS : Windows 10 Professional [10.0 Build 15063] (x64) System specs: Asus Z97 Pro Intel Core i5 4690K Klevv DDR3 2400 GTX 960 WD Black 750GB Mobile HDD (Item#: N82E16822236561) Windows 10 Pro BIOS......something to mention and have in mind, when using this M.2 or any other M.2, if the motherboard came with 4 or 6 SATA ports, the M.2 will take over one of the SATA pors, thus making 3-5 now available. Don't know if that's the case with an NVME drive because I did not use one nor have.

Cons: I don't really have a "CON". By this I mean the fallowing: *I did not have an issue securing it down, and you won't when using the correct screwdriver, in this case a "PRECISION" driver for such a tiny screw. * Gaming performance will not be affected by a "platter", a.k.a. mechanical drive vs an SSD, this only affects in the load up times. "Gaming" performance is affected by the video card and CPU in some cases. * It is ONE of the fastest M.2 "NON MVME" SSD on the market. * What drive does not "spike" in speeds? I have several and they all "spike" in speeds of R/W. * Mounting screw came with my Mother Board. Just like when you buy a "mechanical" drive. Your ATX case came with a bag of screws. * Don't have an M.2 slot? You can buy a PCI adapter for it, inconvenience but.... * I used it, tested it, proved it, and it's really, really fast, compared to my other SSD 2.5". * Loose, because no screw was used to secure it in place? It's me, I used one and it wasn't "loose". Definitely, NOT a single CON on this stick.

Overall Review: Western Digital stands for reliability and solid performance in my book, in the many years of building systems as a hobby and helping family members and co-workers in some cases, I've recommended WD drives, so far I've only had ONE failed since.....oh my! I can't remember, but unlike other brands which I one mention, like Sea...something, the failure rate was 99% of drives. WD, only 1%. The other main reason I choose WD, they provide you with the necessary tools to clone, guard and back up your WD drives, and all at their expense. Personally I use Acronis, it's free and it's proven to be very easy to use and fallow, cloning is what I prefer rather than incremental back ups. And my storage drive is a 750GB mobile Black Edition 7,200 drive, but also a 3TB Black Edition 3.5" drive. It is much easier to recover files than a corrupt OS. I also tested the WD 1TB drive with a 240GB Mushking 2.5" drive, the transfer speeds were pretty much as advertised, seeing a 8GB file transferred in less than 20 seconds is mind-blowing... It's been 3 weeks since I received it since its first format, Windows installation has been done 8-10 times used as main C drive or storage drive, no issues to report on the drive, except for a 2 or 3 hiccups which I'd say were software related, but speeds and benchmarks never changed. This drive is fantastic, I know like M.2 drives, the convenience of not having to clutter the case with more cables and have a drive that uses less energy or will last for such a long time makes me to highly recommend an M.2 drive over a traditional 2.5" or 3.5". You will not be disappointed with this WD Blue Drive. Is it worth the extra $$$ over the non-3D Nand? I think so, based on the technology behind which you can become familiar with when googling it. Two thumbs up drive.

Pros: The Western Digital Blue 3D NAND SATA SSD is the perfect drive for gamers, especially gamers on the go. SSDs are essential for anyone wanting quick load times, whether its booting up an operating system or starting up a massive AAA game. This little WD SSD does not disappoint. The prices for mass storage SSDs are still pretty high. However, 2TB of storage is necessary for anyone wanting to keep everything on a single drive at the same time keep load times down.

Cons: There are no cons for the device itself. However, most people may not want to pay this much for an SSD just yet. Combining a smaller SSD for the OS with a larger HDD for storage is a cheaper way to go, but load times on the HDD will be significantly higher. For example, take the latest DOOM game. It's notorious for long load times. Where a load time on an HDD can take a minute or two, a load time on this SSD will take seconds.

Overall Review: Even though Western Digital was late in the game with SSDs, they are still the top company for any type storage related drives in my opinion. The tests results prove its worth as a competent drive. The max tech specs for the drive are 560MB/s READ and 530MB/s Write. I ran three tests with three different benchmark tools. Here are the top results: ATTO Disk Benchmark (256MB run) READ = 558MB/s WRITE = 532MB/s Crystal Disk Mark (1GB x 3 run) READ = 559MB/s WRITE = 529MB/s AS SSD Benchmark (1GB run) READ = 520MB/s WRITE = 470MB/s As you can see, the number from the first two real world application come close to the max read/write as specified for the drive. The WD Blue 2TB SSD is what it says it is. Expect to get what you pay for. I highly recommend this SSD.

Pros: I got this drive and put it to work immediately. I ran CrystalDiskMark 5.2.2 against this drive and a Kingston and a Samsung SSD, all purchased new within the last 12 months. Result? A small difference in numbers, each of the 3 drives was slightly better (usually under 1%) in one category than the other. Close enough where I can't conceive of a circumstance where anyone could reasonably find one "superior" enough over the other. I set it up as separate storage for VM (Virtual Machines) running under my windows 7 box with the VMs running Linux which I develop on for an average of 8-10 hour a day 5 days a week (yeah.. I have a life off of my computer on the weekends). The average size of my VM drives are about 50GBs, so I keep archival backups so that if I crash the one I am working on, I am not set back far. For safety about once a week I copy one off the drive. So far it's hugely solid, no unexplained crashes or other issues.

Cons: So why missing one star? I compared the MTBF and warranty to what I could find on the other two drives. The MTBF I don't worry about too much as I have worked in the industry and I know it can be gamed to some extent. The warranty however is a truer reflection in the confidence a company has in it's product as it is a direct "Cost" given that the company knows that a given amount of drives will fail. The longer that warranty is the more costly to the company. So if you found two nearly identical products and one had a longer warranty, it would likely be a more honest reflection of the product. WD has a 3 year warranty on their drive and another company has a 5 year warranty on their drive that is near identical in size/cost/performance. It is hard to tell however if a company is willing to relinquish more profits on a per unit sale for greater sales in volume, which in the long run make and keep you a market leader. What I'm saying is that why warranty is a good indicator, it doesn't necessarily indicate a superior product - though it directly benefits the customer to a greater extent.

Overall Review: As I used to write test code for an SSD manufacture (none of the companies mentioned - and haven't worked for them in 7 years, I had some insider knowledge that isn't common knowledge. The most important can be reflected in the following statement. There isn't much difference in the qualities of the leading brands. Mostly look at the things that might be the most important to you rather that is the migration software, warranty period, status of the brand name, or the design of the case. I would end by saying this appears to be a high quality product, worthy of consideration.

Pros: First step I took was to clone my desktop using USB3 port and an Orico 2.5 drive adapter took 25 minutes to clone 177GB from a 240GB SanDisk Z410 then I wiped the drive installed it in the same computer and re-cloned it and it took 20 minutes same computer same original SSD. Then removed SanDisk drive and booted off the new drive took approximately 21 seconds from push power button to inside windows. Everything migrated without any issue. I used MiniTool Partition Wizard 10. WD does offer free cloning software for download from their website Acronis true image but I prefer not to use that one based on their past versions that were not as reliable as the one I prefer to use.

Cons: none that I can see except the cost of larger drives still needs to come down some more but it beats the heck out of when we were paying $130 for a 20GB WD blue spin drive on sale.

Overall Review: CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo Crystal Dew World: http://crystalmark.info/ Sequential Read: 491.136 MB/s Sequential Write: 467.627 MB/s Random Read 512KB: 376.922 MB/s Random Write 512KB: 446.683 MB/s Random Read 4KB (QD=1): 32.065 MB/s [ 7828.3 IOPS] Random Write 4KB (QD=1): 85.558 MB/s [ 20888.1 IOPS] Random Read 4KB (QD=32): 194.030 MB/s [ 47370.5 IOPS] Random Write 4KB (QD=32): 174.587 MB/s [ 42623.9 IOPS] SYSTEM: Living Room computer ASUS 970 PRO Gaming/Aura MOBO AMD FX-8370 Vishera 4.0 Ghz 2x8 GB Gskill Ripjaw RAM Rosewill Blackhawk gaming case Corsair CX500 PSU Blu-ray lightscribe burner EVGA 730 NVIDIA graphics card Dual ASUS 23” Widescreen monitors stacked top and bottom Windows 10 pro 64 bit

Pros: Great SSD for the price and if you are using it as a boot drive you'll be set for a long time. Running current 3D NAND tec and keeping pace with its competitors 500GB of storage Fast and no problems to date

Cons: 4K r/w are very slow, with a cap for me running an average of 45MB/s.

Overall Review: I have always been a WD consumer when it comes to drives and this SSD is no exception. Fast right out of the gate and no issues that I can find. My tests were run on Windows 10x64,AMD 8-Core,16GB ram,and a Sabertooth 990FX R2. People have complained about the 3 year warranty but with how fast tech is changing in our world, you should be replacing your equipment every 3 to 5 years anyway. So the warranty for me is not a problem. Ran my test against a PNY Optima 240GB SSD and a Samsung 830 512Gb. WD out performed the PNY by a long shot and at times was neck and neck with the 830. Though in the end the 830 did out perform the WD SSD. Overall I like this drive a lot and for the price you could get others for cheaper. I wouldn't as WD has always made good drives and stood behind their products. To me that makes the difference when I decide what hardware I will buy. If you want to build a rig with this SSD I saw go for it and you will not regret it at all. WD Seq: R345 W352 4K. R33 W71 Samsung 830 Seq. R367 W377 4K. R33 W75 PNY Seq R245 W252 4k. R27 W56