Solid state hard drive or solid state drive (SSD) is a new technology for data storage hardware. Are taking place especially in the notebook market and the new generation of netbooks, given the characteristics of small size and high performance.
The differences with traditional hard drives are obvious, and no mechanical parts such as magnetic heads and disks, but use a NAND flash memory. To be clear are the same or very similar to those used for CompactFlash for digital cameras or USB Flash Drive (apart from the old pendrive that used a NOR flash technology now obloseta and poorly performing).
The main innovative features are a higher resistance to wear and tear (due to the absence of mechanical parts most sensitive), which guarantees high stability and security in data storage.
Besides this, most important, the write speed and read greatly improved, the access time to data appears to be up to fifty times smaller than the traditional magnetic disks. Heat production is very limited, no noise, and very small, a framework of close interest to this new type of technology.
Some drawbacks, for many non-minor, however, are present.
First of all the costs are still very high, and another non-negligible, the market currently does not provide solid-state hard drive for large capacity, Forget for the moment to overcome the 32-64 Gb, a feature that is not always appreciated by those who suffers from not having at least 250Gb.
Another little problem is longevity, because the ability to rewrite a single row of bits is not very high, defect, together with the cost a little more 'high, will disappear in time thanks to an innovative technique that exploits the use of nanotubes in carbon.
Ultimately this technology seems very interesting and some are already taking place, we'll see if one day supplant the old storage devices completely or follow a path parallel and alternative.
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