Date: Mon, 23 Feb 1998 08:42:06 -0600 (CST) From: "Paul T. Root" <proot@horton.iaces.com> To: jkb@best.com (Jan Koum) Cc: grog@lemis.com, blisowes@cgocable.net, freebsd-questions@FreeBSD.ORG Subject: Re: How can I mirror a FreeBSD hard drive? Message-ID: <199802231442.IAA28036@horton.iaces.com> In-Reply-To: <Pine.BSF.3.96.980222000044.9341I-100000@shell6.ba.best.com> from Jan Koum at "Feb 22, 98 00:01:03 am"
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In a previous message, Jan Koum said:
> 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?
I resently made 4 identical systems by installing on one, and moving the
disk of the other machines to the first one and using:
mount /dev/wd1a /mnt
cd /mnt
dump 0f - / | restore -rf -
and so on for the other partitions.
--
You know Hobbes, some days even my lucky rocketship underpants don't help.
-- Calvin and Hobbs
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