From owner-freebsd-questions@FreeBSD.ORG  Tue Nov 29 10:56:12 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 55C0B16A41F
	for <freebsd-questions@freebsd.org>;
	Tue, 29 Nov 2005 10:56:12 +0000 (GMT)
	(envelope-from shearwater@gmail.com)
Received: from xproxy.gmail.com (xproxy.gmail.com [66.249.82.201])
	by mx1.FreeBSD.org (Postfix) with ESMTP id D69D843D49
	for <freebsd-questions@freebsd.org>;
	Tue, 29 Nov 2005 10:56:11 +0000 (GMT)
	(envelope-from shearwater@gmail.com)
Received: by xproxy.gmail.com with SMTP id h27so2699016wxd
	for <freebsd-questions@freebsd.org>;
	Tue, 29 Nov 2005 02:56:11 -0800 (PST)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=jwSVa4RpsOIx10efJD2if/WfbZPhYtxTJsaOe8qVpcReWd6bw0qf3vS+nAFpXx4xEZssmhaJtA328mvP1010tTJN1E5COuYsmxm9vJLAHREfdxgrvt6f4nVu62ld+8cB3kLh807wMoHQP3Kr9+pC+ZxGZfUjvShcWJDEA0UHzhY=
Received: by 10.64.220.2 with SMTP id s2mr4199043qbg;
	Tue, 29 Nov 2005 02:56:11 -0800 (PST)
Received: by 10.65.196.14 with HTTP; Tue, 29 Nov 2005 02:56:11 -0800 (PST)
Message-ID: <a95667470511290256q52635623wf72a3cf4f9953f82@mail.gmail.com>
Date: Tue, 29 Nov 2005 10:56:11 +0000
From: Ruan Kendall <shearwater@gmail.com>
To: Wojciech Puchar <wojtek@tensor.3miasto.net>
In-Reply-To: <20051129114254.U31139@chylonia.3miasto.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
References: <a95667470511290137w15727719h95790531bfd27d92@mail.gmail.com>
	<20051129114254.U31139@chylonia.3miasto.net>
Cc: freebsd-questions@freebsd.org
Subject: Re: Zero Channel Raid
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 29 Nov 2005 10:56:12 -0000

I was rather hoping to be able to boot from a RAID5 array, giving me a
safety net in case of disk failure but still giving me effectively 3
disks worth of storage space. Using two RAID1 arrays would be an
alternative, but that would mean having less space available.

I am uncertain of the perfomance penalties of the ZCR/RAIDIOS setup,
though the press releases (but the vendors, naturally) imply that it
isn't too serious. As for saturating the PCI bus, I have no immediate
use for it, nor do I envisage needing it at any time in the near
future.

  - Ruan

On 11/29/05, Wojciech Puchar <wojtek@tensor.3miasto.net> wrote:
> > raid card for my Gigabyte SR125E machine. This sort of card does not
> > appear to be very widespread, and I have only managed to track down 3
> > candidates;
> >
> > Adaptec 2020ZCR
> > Intel SRCZCRX
> > LSI 320-0X
>
> i don't think is as a good idea, just saturating the bus user to put data
> back and forth. software RAID will work better, and cheaper.
>