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Date:      Tue, 14 Oct 2003 17:13:11 -0600
From:      Tillman Hodgson <tillman@seekingfire.com>
To:        "Greg 'groggy' Lehey" <grog@freebsd.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Restoring vinum root from dump
Message-ID:  <20031014171311.Z30205@seekingfire.com>
In-Reply-To: <20031014012450.GQ57013@wantadilla.lemis.com>; from grog@freebsd.org on Tue, Oct 14, 2003 at 10:54:50AM %2B0930
References:  <3F89E312.6090502@syspres.com> <20031014012450.GQ57013@wantadilla.lemis.com>

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On Tue, Oct 14, 2003 at 10:54:50AM +0930, Greg 'groggy' Lehey wrote:
...
> In particular, if you restore /usr/lib you'll replace the C library
> /usr/lib/libc.so.  It's then possible to crash dynamically linked
> processes (since they no longer have libraries), after which you could
> be left with a mainly unusable system.
> 
> Vinum offers a solution to this problem, as you've noted: detach a
> plex from each volume and restore to it.  Then do some magic in single
> user mode to remove the other plex and attach the one you've just
> restored to.  I'm not quite sure about the best way of doing this.
> I'll think about it, but if anybody else has suggestions for doing
> this with the least chance of shooting yourself in the foot, I'd be
> interested to hear them.

Once you've had a chance to think about it, would you mind posting yours
thoughts someplace public? I think that there's much magic in that
general direction, though the path may need to particularly exact to
avoid stepping on a mine :-)

-T


-- 
The envious man thinks that if his neighbor breaks a leg, he will be able
to walk better himself.
	- Helmut Schoeck, _Envy: A Theory Of Social Behavior_



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