SSD Vs. HDD

Today, in this fast world people cannot afford compromise with speed. Now a days there are two technologies in the market conventional HDD (hard drive) and SSD (solid state drive) for storage of data. User has to evaluate his requirements as well as Budget (of course!!) before selecting a storage device. This leads to question how? And which is best in different scenarios?

Introduction to HDD and SSD: Conventional HDD drives contain multiple disks called platters, which are covered in a magnetic coating and then rotated at high speed. Drive heads then move across the platters, changing the magnetisation of the material beneath to record data, for reading stored data in it does the same job. It stores data though power is off in technical term it is non-volatile memory. Here rotation is required in order to read or write data, takes considerable time as well as power which has major impact on performance of pc. And of course power consumption is one of major factor affecting device running on battery like laptop, tablet.

An SSD performs the same function (saving your data while the system is off, booting your system, etc.) as an HDD, but instead of platters, the data is stored on interconnected flash memory chips. This eliminates the problems of platters, moving heads and problems caused by generation of electromagnetic field due to rotation of head. The flash memory chips can either be permanently installed on the system's motherboard (like on some small laptops and netbooks). This technology is essentially being used in mp3 player, memory cards, cameras and in many more devices.

SSD drive can give excellent performance at the cost of price in other words if you want high performance that you need to pay more. Conventional HDD works like fan, which takes time to reach to the full speed after turning it on while in SSD there is no problem of speed it gives maximum rate of data transfer at any time i.e. it is ready anytime. SSD is also more reliable than conventional HDD. It is advisable for users to use SSD who can’t afford the compromise in speed.

Recently Samsung unveiled the first 3D  NAND memory. 

Read more on wikipedia:

http://en.wikipedia.org/wiki/Ssd