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Date: Tue, 22 Jan 2013 17:34:23 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: Oleksii Tsvietnov <me@vorakl.name>
Subject: Re: busy on all disks that are a part of the ZFS pools without any
 load
References: <50FE9BB5.9090308@vorakl.name> <50FE9DCD.4040204@FreeBSD.org>
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on 22/01/2013 17:05 Oleksii Tsvietnov said the following:
> On 01/22/2013 04:51 PM, Andriy Gapon wrote:
>> That's the average value since boot to now?
> 
> Maybe...
> Does iostat's busy always show avarage value since boot?

Use -w option to see current state (starting from the second screen).
Manual pages rule :-)

-- 
Andriy Gapon