CrazyElf

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Everything posted by CrazyElf

  1. See the following: http://www.anandtech.com/show/11209/intel-optane-ssd-dc-p4800x-review-a-deep-dive-into-3d-xpoint-enterprise-performance http://www.tomshardware.com/reviews/intel-optane-3d-xpoint-p4800x,5030.html Latency seems better and the Read performance at 4k at QD1 on the Anandtech review is very good.
  2. That drive write per day doesn't seem too much 32 GB on 100 GB/writes per day - that's barely 3 DWPD, which is about the same as an enterprise TLC SSD. That falls well short of expectations IMO of 3D XPoint's claimed endurance and certainly nowhere near DRAM. I wonder if these are low binned 3D XPoint.
  3. Is anyone else underwhelmed b y the endurance of these drives? It's not like RAM which basically lasts forever (ok maybe the the radioactive decay of key elements might cause issues). 30x DWPD is not that much. A PM1725 with NAND is 5 DWPD. With SLC and the same amount of overprovisioning, we are looking at 50x easily. 10x DWPD is just double that of many NAND SSDs. It is looking like this thing's QD1 performance, low latency, and worse case performance might be the only things going for it. Judging by the price it's not that far from DRAM itself.
  4. I'm surprised that this is not faster than the majority of the competition. Perhaps as you note, that is because of the SSD 960 series being so strong. I wonder if the PCIe x8 version would be slightly faster. They say 6000 MB/s sequential read and 1,000,000 IOPs random read, so it is certainly possible. No improvements on the write speed though. I would love to see a SSD someday overtake the PCIe 3.0 x8 limits though (that Samsung isn't too far on the sequential though) - we may someday need a PCIe 3.0 x16 SSD! It is also likely that this is a TLC drive. All of Samsung's other "PM" drives are TLC, while the "SM" drivers are MLC. Still the PE cycles at 40nm 3D should more than adequate. Maybe an MLC drive would do better - both in endurance and performance. The difference should be comparable to the 960 Evo to Pro I'd guess, provided they both have the same percentage of overprovisioning. Overall, I'd say the Huawei ES3600P V3 and the HHHL ES3600C V3 are the top SSDs.
  5. Now that helium hard drives have been on the market for a couple of years, would you consider them to be as reliable as existing "conventional" hard drives, more reliable, or less reliable? Will the helium inside eventually leak out?
  6. It looks like they already have one. The Samsung SM961 (MLC version) and PM961 (TLC version): http://www.anandtech.com/show/10168/samsung-shows-off-sm961-and-pm961-ssds-oem-drives-get-a-boost The Anandtech article mentions that both have the Polaris controller; not sure if it is the same one as before. Here's a review too: http://www.tomshardware.com/reviews/samsung-sm961-ssd,4608.html For sale 512 GB SM961: https://www.amazon.com/Samsung-Genuine-Eluktronics-Eluktro-MZVKW512HMJP-00000/dp/B01N2IRIDV/ref=sr_1_2?s=pc&ie=UTF8&qid=1482178679&sr=1-2&keywords=sm961 1TB PM961 https://www.amazon.com/Samsung-Genuine-Eluktronics-Eluktro-MZVLW1T0HMLH-00000/dp/B01MSO0S39/ref=sr_1_9?s=pc&ie=UTF8&qid=1482178679&sr=1-9&keywords=sm961 Let me know what you think. There are probably reviews of the PM961 somewhere on the web.
  7. Is this leaderboard worthy? It does seem to be overall, an improvement over the last generation. Any word on if there will be enterprise versions? The SM951 for example had the SM953, which was an enterprise variant with power loss protection. There are typically enterprise versions, like the 850 Pro having the Samsung SV843 and Samsung SM863.
  8. At this rate, we are going to need PCIe 3.0 x8 slots soon enough for SSDs - either that or a PCIe 4.0 x4 motherboard pretty quickly. Any idea what the 4k QD1 read/write will be? That is what really matters for most end consumers versus sequential.
  9. Maybe they will counter with a larger SSD 750 Evo. That seems like a logical approach. But yeah, I see your point. At the low end, margins are razor thin and competition will be fierce. I just hope that this someday translates into better prices for higher end MLC SSDs.
  10. The SSD 850 Evo more or less ran circles around the MX300 performance-wise. It will come down to price I guess. Still, it's nice that affordable 2TB (or about 2TB) HDDs are coming to market. I guess it's street price that matters.
  11. The weak 4k performance on this SSD makes it a questionable choice, seeing that 4k is the main type of workload for consumer use. Apparently this drive is also very energy efficient, which is may make it compelling for laptop use though. Just curious, are there any consumer drives with Toshiba's 48 layer 3D NAND BICs? https://www.toshiba.co.jp/about/press/2015_03/pr2601.htm?fromRSS=IR2015032601
  12. Are these all TLC NAND products or is Samsung also planning to release a 64 high 40nm MLC NAND?
  13. Basically an SSD for people who need capacity, but don't care about speed. Depending on how it's priced I guess it might have a chance. The 850 Evo 1 TB seems to be the closest thing this has to a competitor and it is a faster performing drive overall.
  14. Well, we can settle, so to speak. This image is impressive: QD1 Performance of 3D XPoint I guess the real world performance was never going to be as good as advertised - 1000x. It's not a replacement for DRAM for sure. I wonder how many P/E cycles 3D XPoint/Quant X can take? Especially compared to an MLC 3D NAND SSD at 40nm today? It's advertised to be a lot better than NAND, but Micron only advertises 25 DWPD. http://www.tomshardware.co.uk/intel-micron-3d-xpoint-memory,news-53632.html I'm surprised at that one. A 40nm MLC 3D NAND SSD with 28% overprovisioning can do 10 DWPD. A hypothetical 40 nm SLC 3D NAND with 28% overprovisioning could probably do 25 DWPD easily. The real question is, what is the real world endurance of 3D XPoint or is the 25 DWPD just ultra conservative?
  15. I stand corrected then. Hmm ... are there any differences between this and the Memblaze Pblaze 4? The only I can see is that the Pblaze 4 uses 15nm Toshiba Toggle NAND. I would assume the firmware is different? That would explain the performance differences? They will probably offer a full height 6.4 TB version as well I would guess. There was one on the PBlaze 4.
  16. Apparently Micron can make a very fast SSD if it chooses to - something that we don't seem to see very often in its consumer based SATA SSDs.
  17. The performance is certainly behind the competition, but I guess it's a decent bargain. The Samsung SSD 850 Pro is about 50% more in terms of cost per GB. I'd assume up to 2TB will be released.
  18. Another tech demo of Optane: https://www.youtube.com/watch?v=gMJCA2ZWfk0 Article: http://www.pcper.com/news/Storage/IDF-Shenzhen-Intel-Demos-3D-XPoint-Optane-File-Copy-2-GBs It's really the random IO performance that is impressive.
  19. I wonder if there will be an MLC version too. Probably something like a giant SM863. That will be even more costly per GB, although the max capacity won't be as high.
  20. There was a study presented on Google's datacenter SSDs as of late: https://0b4af6cdc2f0c5998459-c0245c5c937c5dedcca3f1764ecc9b2f.ssl.cf2.rackcdn.com/23105-fast16-papers-schroeder.pdf Conclusions are interesting: SLC not more reliable than MLC 20-63% of SSDs develop a uncorrectable error in the first 4 years and 30-80% develop at least 1 bad block Drives tend to have few or many bad blocks Replacement rates for SSDs is lower, but their rate of errors is higher Anyways, the full study is worth reading. I suppose though that there is no real benefit in keeping SLC.
  21. Apparently it may not be superior in terms of data integrity. Maybe only to survive raw P/E cycles then?
  22. Are we going to see a flood of NVMe SSDs this year? I think we've reached the point now where there are going to be more mainstream SSDs. I am hoping that the price premium goes away (ex: price per GB is comparable to say, an SSD 850 Pro). I would like to see 4k Rnadom @QD1 performance go up. The new drives look plenty fast too - RevoDrive 400:
  23. It'd be interesting to see what the margins are. I bet that the lower end SSDs (like the BX series from Crucial, OCZ's Trion, etc) are more or less breakeven - only there for the volume. Perhaps mid-range ones as well. Let's define mid-range as say, SSDs like the 850 Evo, or some of the MLC ones. Then top end SATA like the 850 Pro probably have a fair bit of margin. How much more expensive is MLC die over TLC? Right now the 850 Pro is around 40-50% more per GB than the Evo (although it depends on what capacities). I would imagine that right now, NVMe SSDs like the 950 Pro, the Intel 750, etc have some margin. Of course Enterprise SSDs have even more margin on top of that going at 2x per GB or more. Will we end up with say, lower end NVMe SSDs with TLC and then high end ones with MLC and top notch controllers?
  24. Is there anything that causes the price premium other than volume? I mean, let's compare, say a U.2 SSD to a SATA3 one - the components are similar - controller, NAND, etc. The only thing is the interface, which I suppose does command a premium. Is there anything else? Are NVMe controllers more costly?
  25. I guess what I am saying is, I'm hoping to see a day where: High end SSD: 3D NAND NVMe SSD is similarly priced per GB to a SATA3 equal (like the 850 Pro) - right now for example, the 950 Pro costs around 50% more per GB than the 850 Pro Low end SSD: Probably TLC NAND with a slower controller has a similarly priced NVMe option I'd imagine that even low end controllers and NAND will be bottle necked by SATA3 at some point. The only big leap that I can see in terms of performance maybe outside of the SATA to NVMe leap is the mainstream adoption of RRAM. That will start to happen around 2020? By mainstream, I mean not just a few high priced enterprise, but a drive, say whatever replaces the 850 Pro, as an RRAM based drive?