Hard disks are digital data storage equipment or device. It is non volatile. Computer storage data can be stored in the magnetic hard disk. It is available in various ranges of storage capacities. Several platters are found in single hard disk. These platters have two read or write heads for both the sides. These heads are connected to a single access arm as a result of which these read and write heads cannot move independently. Hard disk is a part of a complete unit referred as hard disk drive which stores as well as gives quick access to huge data on electromagnetically charged surfaces. The computers available today in market have hard disk of several billion bytes of storage capacity incorporated in them. The hard disk unit has individual rotational speed limit which varies in different types of hard drives. The hard disk access time in these devices is few milli seconds and varies for each computer. The motherboard is the component which holds many very important crucial parts. It is also referred as main board or the logic board. It is the component which gives the electrical connection using which other parts of the computer communicate. It is connected to the central processing unit and also to other devices. The main memory of the desktop computer, its microprocessor and other important parts are associated with the motherboard. Many components are also attached to the motherboard through cables and include the video and sound display and external storage. The most important component of motherboard is the microprocessor supporting chipset which determines the properties and features of the motherboard. Microprocessor installation sockets, non-volatile memory chips, clock generator producing clock signal, expansion card slots, and main memory installed slots are the major parts of the motherboard. These components get the electric power supply from the power connectors which in turn are associated with the computer power supply unit. Connectors and logic in motherboards support input devices like mouse. It has heat sinks and mounting points to protect the system against heat effects. Motherboards of various types and ranges are available. High quality assemblies are found in the device. The motherboard used in the laptop are highly customized and integrated ones and hence makes the device very costly to upgrade and expensive in case of repair. Damage of a simple component in turn results in the replacement of the mother board unit as the system is highly integrated. Durable, cost effective and long lasting varieties of these devices are generally preferred by the customers. Hard Disks is usually selected based on the storage capacity by the customers. Enormous varieties of hard disks and motherboards are sold in the market. Perfect research and quality credentials of the device is essential to gain maximum efficiency from the system. The main memory of the desktop computer, its microprocessor and other important parts are associated with the motherboard. Many components are also attached to the motherboard through cables and include the video and sound display and external storage.
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