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SSD is an acronym for Solid State Drive, more commonly called the electronic disk that utilises a solid state retention space to the information and offers access to it in an identical manner as would a standard I/O hard drive. Hard Disk Drives HDDs and floppy disks are differentiated from SSDs on the basis of their information caching mechanism.

HDDs store info on electromechanical portable parts such as spinning disks, and so on. SSDs, on the other hand, store information on micro chips that are non volatile in nature and containing no moving parts like those of HDDs.

SSDs are composed of flash memory modules that function in such a way the device retains the information or information even if the power is turned off. It differentiates itself from RAM in the way that it doesn't require permanent power supply solely to retain the information in the memory as it can hold data for months. Caching SSDs have now become an important component of the notebook designs and ultrabooks like Apple MacBook Pro, etc.

The primary reason behind it can be regarded to the incontrovertible fact that it doesn't warm up. Traditional disc drives incorporated metallic wheels that used to spin info at about 7200rpm that produced heat in the system. SSDs have micro chips rather than the wheel like structure. All the information is cached in the chips and the resulting in no heat emission.

At first the ssd caching speed was awfully low as showed by Tomshardware.com of on 14mb/s. Technical advancements have led companies like Mtron to produce SSDs having a 120mb/s read, and 90mb/s writing speed. SS drives cache data noiselessly. This can also be regarded to the fact that these drives do not have a spinning metallic wheel rather they store info in the micro-chips within them.

Without doubt, storing or caching information thru SSDs is the most highly efficient way nonetheless it comes with a price. A standard 64Gb ssd drive would cost anywhere between $100-$150, while you can pick up a 1TB HDD drive for a similar price.