From owner-freebsd-fs@FreeBSD.ORG  Wed Jan 23 21:09:36 2013
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 40A15A73;
 Wed, 23 Jan 2013 21:09:36 +0000 (UTC) (envelope-from feld@feld.me)
Received: from feld.me (unknown [IPv6:2607:f4e0:100:300::2])
 by mx1.freebsd.org (Postfix) with ESMTP id E88DDF12;
 Wed, 23 Jan 2013 21:09:35 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=feld.me;
 s=blargle; 
 h=In-Reply-To:Message-Id:From:Mime-Version:Date:References:Subject:Cc:To:Content-Type;
 bh=IFkEk7sxzpdO70vPGpC8J/+tzwpriEknEjCNY6nj8CI=; 
 b=gwP/BUB4vMWXgEYRdTkkboCD7L4b2CuuCc2FlM8aFqvUKUSEwzsbtBJCAoRLSg9JdJdGEmNYxREFa3YBvnk2xjhGMr2AgIGniYuIaHdHqGWigjtT8cg+bVyBRAVsg8Ia;
Received: from localhost ([127.0.0.1] helo=mwi1.coffeenet.org)
 by feld.me with esmtp (Exim 4.80.1 (FreeBSD))
 (envelope-from <feld@feld.me>)
 id 1Ty7ZY-0003UU-Fb; Wed, 23 Jan 2013 15:09:28 -0600
Received: from feld@feld.me by mwi1.coffeenet.org (Archiveopteryx 3.1.4)
 with esmtpsa id 1358975362-13187-64949/5/1; Wed, 23 Jan 2013 21:09:22
 +0000
Content-Type: text/plain; format=flowed; delsp=yes
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>,
 Chris Rees <utisoft@gmail.com>
Subject: Re: ZFS regimen: scrub, scrub, scrub and scrub again.
References: <CACpH0Mf6sNb8JOsTzC+WSfQRB62+Zn7VtzEnihEKmEV2aO2p+w@mail.gmail.com>
 <alpine.BSF.2.00.1301211201570.9447@wojtek.tensor.gdynia.pl>
 <20130122073641.GH30633@server.rulingia.com>
 <alpine.BSF.2.00.1301232121430.1659@wojtek.tensor.gdynia.pl>
 <CADLo838Rst7wEtV7DpY23XjpcFCsOkrN=axE1AscyO7vYgSKSg@mail.gmail.com>
Date: Wed, 23 Jan 2013 15:09:22 -0600
Mime-Version: 1.0
From: Mark Felder <feld@feld.me>
Message-Id: <op.wrdudwx334t2sn@markf.office.supranet.net>
In-Reply-To: <CADLo838Rst7wEtV7DpY23XjpcFCsOkrN=axE1AscyO7vYgSKSg@mail.gmail.com>
User-Agent: Opera Mail/12.12 (FreeBSD)
Cc: freebsd-fs@freebsd.org, freebsd-hackers@freebsd.org
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 23 Jan 2013 21:09:36 -0000

On Wed, 23 Jan 2013 14:26:43 -0600, Chris Rees <utisoft@gmail.com> wrote:

>
> So we have to take your word for it?
> Provide a link if you're going to make assertions, or they're no more  
> than
> your own opinion.

I've heard this same thing -- every vdev == 1 drive in performance. I've  
never seen any proof/papers on it though.