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TPI
Last modified: Tuesday, May 19, 1998 

Short for tracks per inch, the density of tracks on a disk. For example, double-density 5.25-inch floppies have a TPI of 48, while high-density floppies record 96 TPI. High-density 3.5-inch diskettes are formatted with 135 TPI. Hard disks have TPIs in the thousands.

 
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Disk Drives

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disk

track

track density

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