Continuing with this evil top posting.....

Your analogy is largely obsolete, as drive manufactures took steps
to utilize the the surface uniformly years ago.

On Wednesday 08 December 2004 16:30, Yan-Fa Li wrote:
> Think of an old fashioned 78RPM record player.  The disc spins at a
> constant speed, 78RPM.  The outer part of the disc is moving faster than
> the inner part, but the time the head has to read and write is the same
> regardless of where you are on the disc.  Therefore the inner part gets
> data faster because it has to spin much less to read the same amount of
> data assuming all the tracks hold exactly the same amount.
>
> Dave Howorth wrote:
> > Please excuse my ignorance, but I'm not sure what you mean by the inner
> > parts having greater areal density. I thought that tracks near the
> > outside of the disk had more sectors so that the lineal density was
> > comparable to that on the inner portions of the disk. Wouldn't that also
> > make the areal density comparable?
> >
> > Thanks again for all the useful advice on building RAID arrays.
> > Dave
>
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