Definition: TPI (Tracks per inch)


The number of tracks written within each inch of the disk's surfaces, used to measure how closely the tracks are packed on a disk surface. Also known as track density.




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Data Recovery Fact

Platter

The actual storage media in the different type of disk. In the hard drive the platter have a core of glass or aluminum, covered with a thin layer of Ferric oxide or an Cobalt alloy (Co-Ni, Co-Cr, Co-Ni-W). This layer is protected by a layer of a very hard material (overcoat), and a thin layer of lubricant. A CD is a plastic disc in which the data is impressed. It has a metallic, reflecting backside.

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