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Date:      Sun, 22 Feb 1998 00:01:03 -0800 (PST)
From:      Jan Koum <jkb@best.com>
To:        Greg Lehey <grog@lemis.com>
Cc:        Brad <blisowes@cgocable.net>, freebsd-questions@FreeBSD.ORG
Subject:   Re: How can I mirror a FreeBSD hard drive?
Message-ID:  <Pine.BSF.3.96.980222000044.9341I-100000@shell6.ba.best.com>
In-Reply-To: <19980219135057.02353@freebie.lemis.com>

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On Thu, 19 Feb 1998, Greg Lehey wrote:

>On Wed, 18 February 1998 at 20:51:15 -0500, Brad wrote:
>>
>> 	To Whom It May Concern,
>>
>> I have a full, working, beautiful install of FreeBSD.  It is now time for
>> it to go on the Internet.  However,  there is one thing that I still would
>> like to do.  This machine has 2 hard drives in it.  The first drive is the
>> whole FreeBSD install.  The second drive is totally unused.  I would like
>> to mirror the FreeBSD drive to the unused drive so that in the event of a
>> crash, I can just switch the jumpers and the backup drive becomes the
>> master, bootable FreeBSD drive and things carry on as normal.
>
>Well, the only way you can currently do this is with the ccd driver.
>It's not as simple as it sounds, though:
>
>1.  You can't mirror the root file system.
>2.  If one of your drives goes down, you need to reboot and
>    reconfigure to use the other one.

	Could you use 'dd' though?

-- Yan

>
>I'm working on a replacement which will solve problem (2) (and a whole
>lot of other stuff), but it'll be a while before problem (1) is fixed.
>
>> I am still getting used to working in UNIX.  I am slowing
>> transforming myself from a Windows person to a UNIX guy.  So, if you
>> find the time to help me out, please be very specific in your
>> instructions with some explanation if possible.  I appreciate any
>> help you can throw this way.
>
>Welcome!  I'm afraid my answers *aren't* as specific as you'd like.
>One of the reasons is because configuring ccd is like pulling teeth.
>Another is that I hope you'll use my driver when it's finished.
>
>Greg
>
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