From owner-freebsd-fs@FreeBSD.ORG  Mon Oct  6 08:30:43 2008
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 251E0106568F
	for <freebsd-fs@freebsd.org>; Mon,  6 Oct 2008 08:30:43 +0000 (UTC)
	(envelope-from dimitar.vassilev@gmail.com)
Received: from yx-out-2324.google.com (yx-out-2324.google.com [74.125.44.29])
	by mx1.freebsd.org (Postfix) with ESMTP id D09658FC1E
	for <freebsd-fs@freebsd.org>; Mon,  6 Oct 2008 08:30:42 +0000 (UTC)
	(envelope-from dimitar.vassilev@gmail.com)
Received: by yx-out-2324.google.com with SMTP id 8so426544yxb.13
	for <freebsd-fs@freebsd.org>; Mon, 06 Oct 2008 01:30:42 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:message-id:date:from:to
	:subject:cc:in-reply-to:mime-version:content-type:references;
	bh=z/zmh9P9FnAtlgfnAyflVi1Ia548YGjC9Pc7N4DhKqc=;
	b=xxscgOWGfwc14GHzr7wEWkTDG1F+WDOwwx76R8t9IH+YBcKFOygFW6K1sAk8WpU18g
	P0SBKL0x9X+cnS5Ly5uqEVuMvfa6vR1EJW4q7sLMHQhA/MNqueypTImXBpwBq5e2MlgY
	C2GLxeVuwSlyBstePGNSLWgtwfE4gJzoFWGLY=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=message-id:date:from:to:subject:cc:in-reply-to:mime-version
	:content-type:references;
	b=BwLtqOS0MvF8ACx/7msRPLfQFh6HWvKwH1f6ELUIzwluUrRCPXwQKxluO/lTSpADXr
	i2By/p8PpLBecyDmi/JEcsBRbp2DeZacGooczucKI5pjKcqi4j65yqMJUdGQhK1/b5th
	HKh2O2zyX7N+0CUibZ15gx8puskxOzoUOiyog=
Received: by 10.151.11.19 with SMTP id o19mr7215738ybi.143.1223281842189;
	Mon, 06 Oct 2008 01:30:42 -0700 (PDT)
Received: by 10.150.182.11 with HTTP; Mon, 6 Oct 2008 01:30:42 -0700 (PDT)
Message-ID: <59adc1a0810060130j14a1707ao132e980dc5f17138@mail.gmail.com>
Date: Mon, 6 Oct 2008 11:30:42 +0300
From: "Dimitar Vasilev" <dimitar.vassilev@gmail.com>
To: "Andrew Snow" <andrew@modulus.org>
In-Reply-To: <48E9C08C.8040108@modulus.org>
MIME-Version: 1.0
References: <59adc1a0810051210t4a3503aci2bc06ba0aa5376c3@mail.gmail.com>
	<48E9556C.9060004@modulus.org>
	<59adc1a0810052225w6d8c1b78r226ffe8ca4ccf35d@mail.gmail.com>
	<48E9C08C.8040108@modulus.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: freebsd-fs@freebsd.org
Subject: Re: zfs as layer distributor
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Mon, 06 Oct 2008 08:30:43 -0000

2008/10/6 Andrew Snow <andrew@modulus.org>

> Dimitar Vasilev wrote:
>
>> Would love if someone to hear if someone has tested hardware raid6 and zfs
>> over it.
>>
>
> Yes, I am using 3ware RAID6 over 16 disks as a single volume, because we
> also had UFS partitions that we wanted to keep.
>
> The performance is more than adequate, but not anywhere near if you used
> them as single disks.   Personally - based on prior experience with certain
> hardware - I'd trust ZFS software raid over Areca hardware :-)
>
> How many disks do you have? If you can split up your disk pack into a group
> of between 5 and 10 smaller RAIDs, that is the optimal range for ZFS
> performance.
>
>
> - Andrew

I got 8 disks out of 12 possible.
As the local reps of Areca told me - RAID6 is good over 12 disks.
So next time I think I will go with raidz2 and pass-through.
Best regards,
Dimitar