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Hard disk platter

A hard disk platter is a component of a hard disk drive, which may have one or more hard disk platters.

Typically made from metal or plastic, a hard disk platter is a rigid, circular disk. A thin layer of either iron oxide or another material that possesses magnetic properties coats each side of a hard disk platter.

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... While the axis is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brake the spinning gyroscope, with a maximum ...

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