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HDDs (introduced in 1956 as data storage for an IBM accounting computer) were originally developed for use with general purpose computers. In the 21st century, applications for HDDs have expanded to include digital video recorders, digital audio players, personal digital assistants, digital cameras and video game consoles. In 2005 the first mobile phones to include HDDs were introduced by Samsung and Nokia.The need for large-scale, reliable storage, independent of a unique device, led to the foundation of embedded systems such as RAID arrays, network attached storage (NAS) systems and storage area network (SAN) systems that provide efficient and reliable access to large volumes of data.<br />

Hard drives put data wherever there’s a physical space on any of the platters that’s large enough to hold the binary in question. Once the data is thin down into small chunks called blocks, the file system (like FAT32 or NTFS) records where those blocks have been placed, and should they get shuffled around, where they have gone.<br />

It’s easiest to imagine that a hard drive is a big filing locker with a master index on the side that lists where every page of every document is stored. A hard drive might not put all the pages in the same drawer, but instead you can read the index and see what drawer each page is saved in.<br />

Unlike traditional platters which are, when compared to flash memory, extremely slow due to their mechanical nature, solid-state disks use NAND flash memory to store information. SSDs feature very fast burst read/write speeds, which are periods of disk activity that are much faster than normal due to data being physically close and easy to recover. On the other hand, they are slower than today’s hard drives for writing progressive bunches of information, a process recognized as sequential writes. Though, due to the nature of a user’s interaction with their PC, a majority of the accessing done on a hard drive is data reading, which SSDs are twice (Or more) as fast at as traditional hard disks.<br />

Also, due to a complete absence of moving parts, SSDs have greatly increased longevity and reliability. The downside to these drives, despite all their amazing benefits, are very high cost per megabyte of capacity, and their low capacity. It is unfortunate that both these traits are what will really stop a consumer from adopting a technology that is superior. There can be no doubt that SSD is the future, but that future is assuredly not now. However, in light of the low capacities and high prices, the technology still has enough merit to be featured in new notebooks arriving in 2007. Reduced power consumption, reduced heat and a long battery life spells great success for this technology in the mobile arena.<br />

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