From owner-freebsd-questions@freebsd.org  Tue Oct 20 22:05:50 2015
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8184EA1A131
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Tue, 20 Oct 2015 22:05:50 +0000 (UTC) (envelope-from wam@hiwaay.net)
Received: from fly.hiwaay.net (fly.hiwaay.net [216.180.54.1])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 38C33F1D
 for <freebsd-questions@freebsd.org>; Tue, 20 Oct 2015 22:05:49 +0000 (UTC)
 (envelope-from wam@hiwaay.net)
Received: from kabini1.local (dynamic-216-186-213-32.knology.net
 [216.186.213.32] (may be forged)) (authenticated bits=0)
 by fly.hiwaay.net (8.13.8/8.13.8/fly) with ESMTP id t9KM5g0q022999
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO)
 for <freebsd-questions@freebsd.org>; Tue, 20 Oct 2015 17:05:43 -0500
Subject: Re: Post install FWIW
To: freebsd-questions@freebsd.org
References: <56265636.4050208@hiwaay.net> <562685CE.5050309@sneakertech.com>
From: "William A. Mahaffey III" <wam@hiwaay.net>
Message-ID: <5626BAB6.4070304@hiwaay.net>
Date: Tue, 20 Oct 2015 17:11:12 -0453.75
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101
 Thunderbird/38.3.0
MIME-Version: 1.0
In-Reply-To: <562685CE.5050309@sneakertech.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 Oct 2015 22:05:50 -0000

On 10/20/15 13:26, Quartz wrote:
>> When I dd'ed /dev/zero to (re-) initialize the individual
>> drives during install, I saw 125-ish MB/s per drive, so this is 90-ish %
>> efficient for this write.
>
> Do remember that using dd to estimate disk speeds is tricky since its 
> write pattern is somewhat non-standard. You should try a more 'real 
> world' test like rsyncing a bunch of random crap with differing sizes.
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to 
> "freebsd-questions-unsubscribe@freebsd.org"
>


*Agreed*, that's why I called it 'light benchmarking'. I will be alert 
to more data as time goes on, but this looked so promising I decided to 
spread the love, so to speak ....


-- 

	William A. Mahaffey III

  ----------------------------------------------------------------------

	"The M1 Garand is without doubt the finest implement of war
	 ever devised by man."
                            -- Gen. George S. Patton Jr.