Hi Yamaban, Great expalanation. I think you know how to buy an ssd. There is no doubt about samsung ssds quality vs other. My question about neutron was to get your opinion about this product. My doubt was about differences between slc, mlc and tlc. Mlc endurance respect tlc is better and I though that the mlc of neutron gives me more endurance respect to the tlc. From a technic point of view, why the samsung tlc is better of corsair mlc? And what about v nand? Have you used it? Thanks in advances Il 28/ott/2016 20:33, "Yamaban" <foerster at lisas.de> ha scritto: > > On Fri, 28 Oct 2016 18:50, Alessandro Baggi wrote: >> >> Il 28/10/2016 16:28, Valeri Galtsev ha scritto: >>> >>> On Fri, October 28, 2016 2:42 am, Alessandro Baggi wrote: >>> > Il 27/10/2016 19:38, Yamaban ha scritto: >>> > > For my personal use I would replace that Drive asap. >>> > > - There is no warranty for it anymore (time since buy) >>> > > - You can't buy it new anymore (discontinued) >>> > > - There are more reliable drives available. >>> > > > > I'd go for a Samsung Evo 850, that will give you five years of > > warranty. >>> > > > > But, it's your drive, you make the decissions. >>> > > > > - Yamaban. >>> > > Thank you for your suggestion. >>> > > What do you think about Corsair Neutron XTi 240 MLC? >>> > >>> Amazing. He suggested you definitely reliable drive (Samsung). Reliable in >>> my boot too. You ask his opinion about yet another Corsair. One by Corsair >>> failed on you already. So, you should have better knowledge about >>> Corsair's SSD reliability, right? >>> >>> Sorry to sound sour, it just amuses me how people keep buying things made >>> by the same company whose products already failed on them. This is what >>> creates the problem: keeps companies manufacturing bad hardware exist. > > [snip] > >> >> Sorry, but my 2 ssds corsair does not report error and works fine, with good performances and without realloc. These disks are not failed. Yes, they are failing but these are old driver and this is a desktop under raid. Consider that these drive are 5 years old, for me this is not bad ssd brand, there are best brand but corsair is not too bad. >> >> Now, Yamaban had suggested samsung because this is the best choice. This does not exclude that there are other products (that can be less reliable and less performant at lower cost) that for my case are good enough. Corsair neutron has also 5 years of warrenty. >> >>> Sorry to sound sour, it just amuses me how people keep buying things made >>> by the same company whose products already failed on them. This is what >>> creates the problem: keeps companies manufacturing bad hardware exist. >>> >> >> If you are AMD user and your old AMD cpu died, You think that AMD must burn due to a cpu failure? Great. >> I'm with you in the case where you buy a disk and after 3/6 months it fails (and this can happen also with very good brand) and this is not the case. Backblaze must burn all brand because many disks fails.... >> >> Now about bad hardware manufacturing companies it's another problem. These companies point to low cost consumer, due the fact that not anyone can get the best hardware due to money. An example? Corsair LE 480 GB (100$) vs Samsung SSD Serie 850 Pro 512GB (260$). 850 Pro is better, but more expensive, and Corsair LE has 3 year of warrenty. Maybe an user can spend his money for a vga or a better cpu. These bad companies permit some users to get hw for less money without a great expecation for cheapest use case and their ability to pay. >> >> Than if these cheap companies must not exist, the user must not use a new technology (at lower cost)? The IT gap. >> >> Sorry, my (m.)2 cents. > > > I'm VERY unsure how to answer on "The Question" of what SSD to buy. > Religious wars have been fought over less. > > So, I'll give a intro on how I select a product for myself, and a view > into how I personally priorise specification requirements. > > - Reliability. A "new" Technology (e.g. SLC -> MLC -> TLC) has to be on > the market for at least a year as a 3-5 year warranty customer product, > or at least 3 month on the market as a 5-10 year warranty datacenter one. > > - Thrustworthyness. How does the manufacturer handle a product gaffe? > * Denial, delay, FUD -> drop that manufacturer, not worthy at all. > * Acceptance of proof, offer of upwards replacement -> good, keep. > > - Openness on product specification. > Full specs should be available on manufacturer web site at no cost. > Proof of specs by testing of not-paid-for-it Third party? Good! > > > In your case, be very thankfull that you got 5 years out of the disks, > not may got that. > > After some datalosses due to sudden drive failure, I'm replaceing my > drives after ca 3 years at similar runtime ("on"-time hours), and that > is why I encurage you to replace your drive. Not to drive the economy. > > In the past "Corsair" was a power enthusiast product, and the time-cycle > for those "enthusiast" was 2 to 3 years. No problem for most of the > "Corsair" products. > > With view on SSD you have to seperate the classes / groups: > 1. Datacenter: 100% on time, 100% backup, failure time is very expensive. > 2. Professional: 30-100% on time, 80-100% backup, dataloss is expensive. > 3. Longtime User: 15-100% on time, 15-100% backup, dataloss is hassle. > 4. Power-Enthusiast: 100% Speed, Backup? -- Can you eat that? > 5. "Walmart" and Co: some speed, some use time, dataloss is your problem. > > (Prices are for Europe, Germany, online buy) > > The "Samsung SSD 850 Pro" with 10year warranty, 2. group, 256GiB ~ 125€ > The "Samsung SSD 850 Evo" with 5 year warranty, 3. group, 250GiB ~ 90€ > The "Corsair Neutron XTi" with 5 year warranty, 3. group, 240GiB ~ 100€ > The "Corsair Force LE" with 3 year warranty, 5. group, 240GiB ~ 70€ > > From the user standpoint, the difference between the Samsung SSD 850 Evo > and the Corsair Neutron XTi is not that big. > Samsung: TLC 3D Flash, 75TBW @ 250 Gib size, 1,5 Mh MTBF, 512MB Cache > Corsair: MLC 2D Flash, 160TBW @ 240 GiB size, ?? MTBF, no RAM-Cache > > Either Corsair does not want to a) test for MTBF, b) show the MTBF, or > c) they are not really satisfied with it and thus hide it. *shrugs* > > > http://www.anandtech.com/show/9799/best-ssds > http://www.anandtech.com/show/10406/corsair-gives-phison-ps3110-s10-another-try-neutron-xti-ssds-launched > > http://www.tomshardware.com/reviews/best-ssds,3891-2.html > http://www.tomshardware.com/reviews/corsair-neutron-xti-ssd-review,4599.html > > > My personal conclusion: > If you are comfortable with the "Corsair Neutron XTi", it will give you a > near same performance for most use-cases as the "Samsung SSD 850 Evo" does. > > Years ago, when the "Samsung SSD 850 Evo" came out I was not convinced, > and went with a "Crucial M4", based on a gut-feeling. I got lucky, > it did hold for 3.5 years at 60% on, and got retired from daily use in > working condition. I still use ist for a fast transfer between open > PCs, 250 GiB USB sticks are still expensive. > > thats my 2ct, YMMV. > > - Yamaban. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >