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The hard disk drive is a data storage device used in computers and other electronic devices. It stores information magnetically on reflective plates that spin under an arm, allowing for quick access to data. The hard drive is faster, more durable, and has a larger capacity than its predecessors.
The hard disk drive, or hard drive, is a data storage device used in computers of all sizes and other electronic devices that can record information. Being an integrated piece of hardware, it also has the benefit of permanence and stored information will remain available until deleted or changed. In a computer, the hard disk drive is usually the largest and fastest storage device available, usually storing essential files such as the operating system and startup programs.
When opened, the hard drive resembles a record player, with one arm passing over the platter. A closer look will reveal not a disc but a stack of reflective plates, each readable on both sides. The arm is also divided into layers, with the layers passing between the platters, meaning that all surfaces of all records can be read at the same time. It should be noted that opening the drive will render it unusable, so this should only be attempted if the hard drive is already broken.
Before the invention of the hard disk drive, data storage options were limited to cumbersome and jam-prone punch cards or magnetic tapes that had to rewind or fast forward to desired information, slowing performance. In 1956, International Business Machines Corp. (IBM) created the first hard disk drive, which allows you to access data quickly and in any desired sequence. In 1973, IBM developed a dual device dubbed the 30-3.0 or Winchester, which is widely considered the forerunner of the modern hard drive.
A hard disk drive stores information magnetically, similar to the method used to record on tape. Magnetic storage allows the disk to retain information even when the machine is turned off, and the disk format allows information to be accessed immediately, without spooling through long reels of tape. The platters spin thousands of revolutions per minute, passing under the head on the arm, which can read, write, modify or erase information.
With advantages such as speed, permanence and volume, most computers store operating systems and essential software on the hard drive. Most computer users also store most of their files on a hard drive. Since computers were first introduced in the home and office, hard drive capacity has come a long way, allowing for larger files and more complex programs.
Another advantage of the hard drive over its predecessors is durability. The tape can wear out with use, and a single bend could render a punch card useless. Hard drives are much more reliable, mainly because the head never touches the recording surface. The head reads and writes by holding it just above the disc, reducing the risk of scratches or general wear. Sealing the hard drive further reduces the risk of wear by keeping dust off the sensitive platters.
