The Samsung 860 QVO (1TB, 4TB) SSD Review: First Consumer SATA QLC
by Billy Tallis on November 27, 2018 11:20 AM ESTAnandTech Storage Bench - Light
Our Light storage test has relatively more sequential accesses and lower queue depths than The Destroyer or the Heavy test, and it's by far the shortest test overall. It's based largely on applications that aren't highly dependent on storage performance, so this is a test more of application launch times and file load times. This test can be seen as the sum of all the little delays in daily usage, but with the idle times trimmed to 25ms it takes less than half an hour to run. Details of the Light test can be found here. As with the ATSB Heavy test, this test is run with the drive both freshly erased and empty, and after filling the drive with sequential writes.
The Samsung 860 QVO has no trouble with the Light test when it is run on an empty drive, and the full-drive performance loss is not too bad: the 1TB 860 QVO remains ahead of the DRAMless TLC drive even when the drives are full.
The average and 99th percentile latency scores from the 860 QVO are no problem when the test is run on a full drive. They're substantially higher when the drives are full, but the latency is better-controlled than on the Intel/Micron QLC drives.
The average read and write latency scores from the 860 QVO are clearly different from the TLC drives for the full-drive test runs, but they don't stand out as significantly worse than what we've seen from some of the slower TLC drives.
The 99th percentile read latency on the 860 QVO is a sore spot when the drive is full, but the 99th percentile write latency doesn't get too far out of control, especially compared to the other two QLC drives.
All of the QLC drives use more energy than the TLC drives during the Light test, and especially when the drives are full and have more background work to do.
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Lolimaster - Thursday, November 29, 2018 - link
HDD's sweet spot for manufacturers is the 4TB and up, they can't really make them cheaper than $40-50 no matter the size, it got tons of physical moving parts, a big chunk of well crafted aluminum, special sealing, etc vs an SSD that is just nand and a plastic casing before at least you got a thin aluminum case.Glaurung - Tuesday, November 27, 2018 - link
Spinning drives aren't going away - capacities are still going up and spinning drives are still the best deal for extremely high capacity storage - like NAS and datacentre storage. That's unlikely to change any time soon. But the amount of storage that you're realistically going to want inside your computer? It's now affordable to go all SSD for your local internal storage.But storage inside your laptop has until now been a case of needing two drives, a fast SSD to boot off of and a slow HDD for your data. Or else pay a ton for a high capacity SSD, or make do with a small drive
Dr. Swag - Tuesday, November 27, 2018 - link
Selling an inferior SSD to the 860 evo for more! What a great ideaPaoDeTech - Tuesday, November 27, 2018 - link
Lower cost (QLC) higher capacity SSDs are very welcome. Is as simple as that. I read an interesting study that basically concludes that an SSD lifespan is usually limited by age not total writes. Interesting. Can anybody confirm or deny?hojnikb - Tuesday, November 27, 2018 - link
Not really. SSDs don't tend to die of old age or exhausted endurance (not in client workloads anyway) but rather random controller faulires and firmwar bugs.One considuration with such flash is data retention. As these are fairly large drives, they will be used for storage and hence this can become an issue.
PaoDeTech - Tuesday, November 27, 2018 - link
Here's the article: https://www.zdnet.com/article/ssd-reliability-in-t...hojnikb - Wednesday, November 28, 2018 - link
Quickly skimming the article, it does seem to suggest, that age has an effect on raw bit errors. What it doesn't include (not that i can find) is wheter drives were the same model and manufacturer.Older drives could be of inferior controllers and weaker firmware design which can't cope with bit errors as well.
spkay31 - Tuesday, November 27, 2018 - link
Personally I think the Intel 660p NVMe SSD's offer a very nice price performance tradeoff when on sale. Yesterday an Intel 660p 1TB drive was on sale for $130. At around 1800Mbps it's ~ 3.5X faster than a SATA ssd and about 45% cheaper than a Samsung 970 EVO 1TB NVMe drive. OK, so it's 1800Mbps vs 3200Mbps but again for my uses that is certainly excellent speed improvement from a SATA ssd and I'm willing to accept some of the other shortcomings of QLC. My experience is that QLC is already a very reasonable value proposition for many applications.JoeyJoJo123 - Tuesday, November 27, 2018 - link
While I have nothing against the Intel 660p, not QLC, and I very much welcome these technologies, even considering black friday """deals""", I still don't think it has become price competitive (yet).I purchased an 860 EVO 1TB for $127 ($127 after tax/shipping), and then later an MX500 2TB for $209 ($229 after tax/shipping). (Bought the 860 EVO 1TB since the 2TB was $299 and therefore much more expensive in $/GB, and because I hadn't seen anything better by the time it was Saturday, but CyberMonday on Amazon brought the $209 MX500. I may or may not return the 860 EVO.)
Both of these drives are 3D TLC based, and still have their marginal sustained read/write advantages over 3D QLC. Given the (roughly) equivalent price between a 1TB 860 EVO 1TB and Intel 660p 1TB, I don't think it's unfair to say that the 860 EVO should be every customer's pick every single time (again, given these """deal""" prices).
As always, it'll take some time before newer technologies drop in prices and mature in overall value. I'm sure it'll happen for QLC drives, as they did with MLC and TLC before them, but it just hasn't happened quite yet.
Impulses - Thursday, November 29, 2018 - link
Wait what? The 2TB MX500 hit $209 this year? Was it a flash sale or something? I had price alerts set on it, the 860 EVO, and the WD Blue/SanDisk Ultra and the cheapest I saw for a 2TB was $255... Granted I was mostly looking at Amazon, where'd you score that deal?