COMPUTER HARDWARE COMPONENTS FUNCTIONS
WHAT IS A HARD DRIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -The number of platters in a hard drive depend on the physical size of the hard drive, its capacity, how many sectors, and its manufacturer. Therefore there is no set number of platters in a computer hard drive. However, all modern hard drives have two or more platters and if the drive is an SSD, it has none.
Detailed explanation-2: -A platter is a circular magnetic plate that is used for storing data in a hard disk. It is often made of aluminum, glass substrate or ceramic. A hard disk drive contains several platters that are mounted on the same spindle.
Detailed explanation-3: -Actually only one read/write head can be attached to the end of the arm. This is to achieve the proper “flying head” air gap between the platter and head. So additional heads cannot be mounted on that same arm (and also maintain a proper air gap).
Detailed explanation-4: -The hard drive contains a spinning platter with a thin magnetic coating. A “head” moves over the platter, writing 0’s and 1’s as tiny areas of magnetic North or South on the platter. To read the data back, the head goes to the same spot, notices the North and South spots flying by, and so deduces the stored 0’s and 1’s.