Advantages and disadvantages of solid state drives

Advantages of SSDS
1, SSD does not need mechanical structure, complete semiconductor, there is no data search time, delay time and disk seek time, data access speed, read data ability above 400M/s, the highest currently up to 500M/s
2, SSD all use flash memory chip, durable, shock-resistant, even if there is a collision with hard objects, the possibility of data loss can be minimized.
3, thanks to no mechanical parts and FLASH flash memory chip, SSD does not have any noise, low power consumption.
4. Light weight, 20-30 grams lighter than the conventional 1.8-inch hard disk, making it possible for portable devices to carry multiple SSDS. At the same time, because of its complete semiconductor, no structural restrictions, can be designed according to the actual situation into a variety of different interfaces, shapes of special electronic hard disk.

Disadvantages of SSDS
The cost of 1 disk is high
The cost of SSDS has fallen dramatically. The 128 GB SSD is at the 1000 yuan level. But relative to mechanical hard disk, the price is still very high ~ and as a notebook manufacturer in the SSD as an optional accessory, the cost of upgrading is much higher than the actual cost, which has led to the price difference between the traditional hard disk notebook and the SSD notebook thousands of yuan.
2. Storage capacity needs to be improved
Today, the traditional mechanical hard disk with the latest vertical recording technology has moved to the 2TB level, while the highest record of solid state disk is still a few hundred GB(POI 2.5-inch SSD products), because the cost of flash memory has been high, few broad business involved in the development of such high-capacity SSD products, even if there are related products appear. There is still a long, long way to go before mass production, and the most practical storage capacity available at this stage is only a few hundred GB. But the price is high.
How to buy SSD
1, look at the main control chip currently on the market the highest share of SandForce II master, because it provides a set of master control scheme. Hard disk manufacturers only need to buy a program, in addition to their own PCB design, flash collocation, firmware algorithm can create a solid state drive, a bit similar to Google's Android open source model, but its drawbacks are the same, that is, the same master to be compatible with a variety of different chips, firmware, Therefore, the hard disk production performance of the major SandForce main control is also a matter of reference, and there are also Mael central control and Intel main control, but there are fewer products, but the performance is quite strong.
2, look at the flash particle
The flash memory particles used in the former SSD are different from the 25/34nm process, MLC/SLC, synchronous/asynchronous, ONFIToggle Mode, and so on. The data transmission rate of different flash memory particles is very different, asynchronous ONFI particles only 50MT/s (lnte or Micron early), synchronous ONF12 field can reach 133MT/s 200MT/s (nte or Micron particles), Asynchronous Toggly DDR 1.0 particles can also reach 133MT/s ~ 200MT/s (TOSHIBA or Samsung particles)