From owner-freebsd-performance@FreeBSD.ORG  Mon Nov 22 22:38:24 2004
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Date: Mon, 22 Nov 2004 23:38:23 +0100 (CET)
From: Claus Guttesen <cguttesen@yahoo.dk>
To: Aaron Glenn <aaron.glenn@gmail.com>,
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Subject: Re: I've ran out of ideas
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> Of course. But why does iostat report 1.3MB/s on a
> completely idle
> system? Is something eating my disk I/O? If so, how
> do I find out
> what, precisely, is?

Try top and press 'm', this will show you io-stats.

Claus