From owner-freebsd-questions@FreeBSD.ORG  Thu Jan  9 07:21:54 2014
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])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id E11622F4
 for <freebsd-questions@freebsd.org>; Thu,  9 Jan 2014 07:21:54 +0000 (UTC)
Received: from mail-wi0-x232.google.com (mail-wi0-x232.google.com
 [IPv6:2a00:1450:400c:c05::232])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id 79A0A1546
 for <freebsd-questions@freebsd.org>; Thu,  9 Jan 2014 07:21:54 +0000 (UTC)
Received: by mail-wi0-f178.google.com with SMTP id bz8so3077828wib.17
 for <freebsd-questions@freebsd.org>; Wed, 08 Jan 2014 23:21:53 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:sender:in-reply-to:references:date:message-id:subject
 :from:to:cc:content-type;
 bh=dTbWuMBOLA1cW/R2uHC0YHdlXofpzP7WvcTD7amPTX8=;
 b=MYABf5nSdAh1CYWK4T9OpqOBjPMH//cZodBu+fi/AB1zJLloXpEkPjBQ6/UNuALxY4
 IqFb3w4Ebf6Sgvtk92TPF5L7n/hhvTKbm2KMau89HSxVgy5mraNWrAVmSDGZOuHmprf/
 5mLY5rKebTEaVtzS4f5X2oHaw2OmFHqODGSIqGywvN4y4tAtM6kiixnYK7bz7o7Rqebf
 xN2beRr0V4amEMqCSAp6MKs6CJOd+YsB8fBgVIIR6bHc9wNRmSKuy//X9iJQYX9D70eE
 IpbkVcdxsj1u7ifmUP81OLBQRu1TFQvffqAwBX01OR/56iMvzz6vcav9FEAslKQmKRzW
 BBJg==
MIME-Version: 1.0
X-Received: by 10.180.74.230 with SMTP id x6mr24648567wiv.29.1389252112899;
 Wed, 08 Jan 2014 23:21:52 -0800 (PST)
Sender: olivier2553@gmail.com
Received: by 10.216.82.70 with HTTP; Wed, 8 Jan 2014 23:21:52 -0800 (PST)
In-Reply-To: <20140109063640.c216a6469914fbbf4cea08bc@sohara.org>
References: <CALeO_hNNtvwsDqjiReZpy-s=0Po8JD9xzv0z6W6rDddcAR=QxA@mail.gmail.com>
 <20140109063640.c216a6469914fbbf4cea08bc@sohara.org>
Date: Thu, 9 Jan 2014 14:21:52 +0700
X-Google-Sender-Auth: x84XOykukhZbgkkN7EDVTReHRq8
Message-ID: <CA+g+BvhqXG__ZyqL+dRsw_N0TfbR1i_oBDREKcUr53S_GWpFWw@mail.gmail.com>
Subject: Re: Server Hang
From: Olivier Nicole <olivier.nicole@cs.ait.ac.th>
To: "Steve O'Hara-Smith" <steve@sohara.org>
Content-Type: text/plain; charset=ISO-8859-1
Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.17
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: Thu, 09 Jan 2014 07:21:54 -0000

Steve,

>> Is it possible to take such a mirror copy of such a  hard disk so that i
>> can replace it as a hot swap. I request all of your expertise. How to do
>> hot swap?please shed some light on it.
>
>         Why not use a RAID1 mirror instead of a hot swap, then when it's
> needed you don't get downtime, you also get the benefit of better read
> performance, and of course it's guaranteed up to date.

Remember the old disk is dying. i would not advise building a raid
around a dying disk :)

Olivier