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SanDisk Announces 4TB SSD, Plans For 8TB Next Year
Lucas123 (935744) writes "SanDisk has announced what it's calling the world's highest capacity 2.5-in SAS SSD, the 4TB Optimus MAX line. The flash drive uses eMLC (enterprise multi-level cell) NAND built with 19nm process technology. The company said it plans on doubling the capacity of its SAS SSDs every one to two years and expects to release an 8TB model next year, dwarfing anything hard disk drives can ever offer over the same amount of time. he Optimus MAX SAS SSD is capable of up to 400 MBps sequential reads and writes and up to 75,000 random I/Os per second (IOPS) for both reads and writes, the company said."
My primary OS is running on an SSD going on 4 years old now... Out of 5 that I have only one had had issues, which was actually it's controller catastrophically failing and not a NAND issue - could have just as easily happened to a HDD.
We have ~100 SSDs installed in our company, workstations, laptops and servers. Over five years only 3 of them died, all Kingstons. Samsung and Intel have been spotless. All of those that died had the following symptoms - if you accessed a certain sector the drive just dropped off - as if you switched off its power. The drive did not remap them as it always dropped off before it could do so. Otherwise the drive remained functional. Got them replaced under warranty.
If you only write infrequently (use for image editing) and then backup storage - how many years would the SSD maintain values?
If the drive is powered down, I wouldn't bet on it lasting the year. Intel only seem to guarantee up to 3 months without power for their drives: http://www.intel.co.uk/content...
Note also that the retention is said to go downwards as P/E cycles are used up. For me, I think they make great system drives, but I don't use them for anything precious.
there are a few reasons they don't make 3.5's
1: physical size isn't an issue, for the sizes they release that people are willing to pay for it all fits nicely in 2.5
2: 2.5's work in more devices, including in desktops where 3.5's live. if noting is forcing the 3.5 usage then it would be bad for them to artificially handicap them selves.
now for your commend on larger physical drives being cheaper. Flash does not work the way that normal dries to.
Normal platter drives the areal density directly impacts pricing as it drives the platter surface to be smoother, the film to be more evenly distributed, the head to be more sensitive, the accurater to be more precise, all things that cause higher precision that drive up costs as it increases failure rates and manufacturing defects causing product failure.
Now in the flash world. they use the same silicon lithography that they use for making all other chips. there are two costs involved here.
1: the one time sunk cost of the lithography tech (22nm, 19nm, 14nm...) This cost is spread across everything that goes though it. And in reality evens out to no cost increase for the final product because the more you spend the smaller the feature the more end product you can get out per raw product put in.
2: the cost of the raw material in. It does not matter what level of lithography you are using the raw material is nearly exactly the same (some require doping but costs are on par with each other). So in fact your larger lithographic methods become more expensive to produce product once there is newer tech on the market.
No please note that in the CPU world where you have complex logic sets and designs there is an added cost for the newer lithography as it adds to the design costs. but for flash sets there is nearly zero impact form this as it is such a simple circuit design.
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