Talk:Track (disk drive)

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)