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HARD DISK (HDD)

Despite of the increasing popularity of SSD because of its reliability, durability due to no mechanical parts, performance of higher data-transfer rates and that it has better resistance to shock, HDD is still the economical choice of storage in general with SSD is averagely 3-5x cost per gigabytes. Magnetic disk of an HDD is manufactured by depositing multilayer of thin coating of materials on an Aluminium/glass/ceramic substrate mostly from vacuum deposition process and dc power generation is used during the magnetron sputtering.