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Date:      Tue, 6 Aug 2002 21:06:05 -0400 (EDT)
From:      Jerry McAllister <jerrymc@clunix.cl.msu.edu>
To:        freebsd-questions@FreeBSD.ORG
Subject:   Vinum
Message-ID:  <200208070106.g77165406324@clunix.cl.msu.edu>

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> 
> Subject: Re: Questions about vinum and failure of root partition
> 
> > > Hmmm ok, I must be missing something here. Let's say I had /usr
> > > and /home mirrored. Now the root partition (that is the boot partition)
> > > is NOT mirrored and the first drive fails. (wiping out the FreeBSD
> > > config altogether.)
> >
> > What do you mean by "FreeBSD config"?
> >
> By that I mean all of / is gone - so essentially all of the FreeBSD install
> is gone - i.e. FreeBSD will not boot up and run upon failure of the first
> drive. It sounds like (from previous emails) that some vinum info is on
> the second drive and I should be able to regenerate the mirror set from
> the second drive. (After I have reinstalled/repartitioned FreeBSD correctly
> of course.) I will have to test this and see how it works exactly for
> myself.

Yes, if you lose root you are dead.
Well, that is what backups are for.  
If you are mirroring everything but a small root, it will take 
less to get back up.  You will only have to build a new root.
You can use the extra space you would have used for the root mirror
to hold an ondisk backup of root - the dump to disk would both write
and restore much quicker than tape.

I can guess at a few reasons that root isn't mirrored, but I don't 
know the official reasons.  It would seem like a nice thing to be
able to do, though.

////jerry

> 
> Thanks for the insight!
> Stephen Hoover
> Dallas, Texas
> 

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