Talk:Track (disk drive)

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How many tracks are on a typical disk ?

Assuming that a modern drive stores 1 TB on a single platter, and that the shape of a bit on a drive is approximately square and the disk has tracks all the way up to the middle:

$8.10^{12}=\sum _{r=0}^{n}2\pi r\Rightarrow n=1595769$

And all the data is infinitely close to the outer edge:

$8.10^{12}=\sum _{r=0}^{n}2\pi n\Rightarrow n=1128379$ —Preceding unsigned comment added by Nroets (talk • contribs) 18:11, 2 December 2010 (UTC)[reply]