Re: Horrible drive performance under concurrent i/o jobs (dlh problem?)

From: Rik van Riel (riel@conectiva.com.br)
Date: Tue Dec 24 2002 - 20:34:26 EST


On Tue, 24 Dec 2002, jw schultz wrote:

> The rotational frequency should be 7200*60/sec which makes
> for 2.31 us which would produce an average rotational
> latency of 1.16us if such a condition even still applies.

That would be 432000 rotations per second, meaning that the
edge of a 3.5" disk would travel at almost 120 kilometers per
second and be stressed by some pretty impressive G forces,
which I'm too lazy to calculate.

Good thing a 7200 RPM disk only spins 120 times a second,
that's a lot safer in consumer applications. ;)

Rik

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