Re: r/w speed inner vs outer tracks

["Paul M. Hirsch" <elektrosatan@voltagenoir.org>]

On Fri, Jun 01, 2001 at 11:18:17AM +0100, Alfred Breull wrote:
> http://apollo.backplane.com/FreeBSD/tuning.html
> says data transfer from outer tracks is more quick than from inner
> ones -- however, two members from our tech stuff say that it is more
> quick from inner track sthan from the outer ones.

The outside on a modern hard drive is logically and measurably faster.
See: http://www.sigmasoft.com/cgi-bin/wilma_hiliter/openbsd-misc/200011/msg01056.html

> So,which is more quick: r/w from inner tracks or from outer tracks ? 
> Or is this neglectable in (about 30 to 90 minutes) cpu intensive 
> computations [i.e. (re-) sortings of indices and elements' values in 
> large matrices] ?

If the data fits in memory, IO speed is not a big issue. The outside tracks
provide substantially better read/write throughput and somewhat better seek
performance.

-Paul

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/Paul M. Hirsch              /
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