From owner-freebsd-questions@FreeBSD.ORG  Wed Jan 30 15:34:56 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 1CECCA34
 for <freebsd-questions@freebsd.org>; Wed, 30 Jan 2013 15:34:56 +0000 (UTC)
 (envelope-from matrix@itlegion.ru)
Received: from corpmail.itlegion.ru (corpmail.itlegion.ru [84.21.226.211])
 by mx1.freebsd.org (Postfix) with SMTP id 2DDAE12D
 for <freebsd-questions@freebsd.org>; Wed, 30 Jan 2013 15:34:54 +0000 (UTC)
Received: (qmail 22350 invoked from network); 30 Jan 2013 19:34:50 +0400
Received: from localhost-artem.itlegion.ru (HELO ?192.168.0.12?) (192.168.0.12)
 by 84.21.226.211 with SMTP; 30 Jan 2013 19:34:50 +0400
Message-ID: <51093D79.5010209@itlegion.ru>
Date: Wed, 30 Jan 2013 19:34:17 +0400
From: Artem Kuchin <matrix@itlegion.ru>
Organization: IT Legion
User-Agent: Mozilla/5.0 (Windows NT 6.0;
 rv:17.0) Gecko/20130107 Thunderbird/17.0.2
MIME-Version: 1.0
To: Paul Kraus <paul@kraus-haus.org>
Subject: Re: Software raid VS hardware raid
References: <5106E301.4070707@itlegion.ru> <ke7v7a$r0d$1@ger.gmane.org>
 <5107A500.4030902@itlegion.ru>
 <alpine.BSF.2.00.1301290749460.27370@wonkity.com>
 <5107FC3C.4030701@itlegion.ru>
 <alpine.BSF.2.00.1301291353570.30931@wonkity.com>
 <51090721.2010606@itlegion.ru>
 <alpine.BSF.2.00.1301300635130.37822@wonkity.com>
 <51092ECA.6070808@itlegion.ru>
 <alpine.BSF.2.00.1301300815300.38610@wonkity.com>
 <C1AEA56C-5D29-4243-A029-47B4A721F91E@kraus-haus.org>
In-Reply-To: <C1AEA56C-5D29-4243-A029-47B4A721F91E@kraus-haus.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://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: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 30 Jan 2013 15:34:56 -0000


30.01.2013 19:28, Paul Kraus:
> On Jan 30, 2013, at 10:22 AM, Warren Block wrote:
>
>> If you want to use the same drive for booting, it's possible.  Create all three partitions on both drives manually.  Then mirror the freebsd-ufs partition only.  The contents of the freebsd-boot partition don't change often, and swap does not have to be mirrored.
> 	Note that if you do NOT mirror SWAP, then in the event of a disk failure you will most likely crash when the system tries to swap in some data from the failed drive. If you mirror swap then you do not risk a crash due to missing swap data.
>
>
yes, that's what i wanted to say.
Also, not being able to boot if first disk has some error in boot 
section or just strangly dead is not an option too. However, i was just 
thinking,
if i use gmirror then bios does not know anything about it. I may set 
both harddisk as boot disk, but if first disk is brain damaged then bios 
may just stuck
trying to boot from it and will not pass boot attempt to the second 
disk. I don't know, it depends on bios of course. But this seems to be a 
disadvantage to
a software raid.

Artem