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Date:      Thu, 30 Sep 1999 20:54:39 -0500
From:      "Jeffrey J. Mountin" <jeff-ml@mountin.net>
To:        Greg Lehey <grog@lemis.com>
Cc:        peter.jeremy@alcatel.com.au, freebsd-current@FreeBSD.ORG
Subject:   Re: System crash on "vinum start"
Message-ID:  <3.0.3.32.19990930205439.021a58c0@207.227.119.2>
In-Reply-To: <19991001105734.F496@freebie.lemis.com>
References:  <3.0.3.32.19990930193723.00936df0@207.227.119.2> <3.0.3.32.19990930182053.0219b760@207.227.119.2> <19990928084130.L46202@freebie.lemis.com> <19990925104024.B54407@freebie.lemis.com> <199909271705.NAA43302@concours.pc.sas.com> <3.0.3.32.19990927153730.0204c420@207.227.119.2> <19990928084130.L46202@freebie.lemis.com> <99Sep28.125643est.40332@border.alcanet.com.au> <3.0.3.32.19990930182053.0219b760@207.227.119.2> <99Oct1.094141est.40344@border.alcanet.com.au> <3.0.3.32.19990930193723.00936df0@207.227.119.2>

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At 10:57 AM 10/1/99 +0930, Greg Lehey wrote:
>You're not typical.  But you *can* grow concatenated plexes.  You just
>can't expand UFS to use the space.  That's not a Vinum issue, but
>somebody's working on it.

Yes, I realized that and donned a pointy hat.

Root (/) and OS specific files are of interest, but not as critical to me.
There are other allowance one can make for redundancy.  Beyond the scope of
this discussion.

>That's a good idea, I suppose.  I'll do that.  Done:
>http://www.lemis.com/vinum/wishlist.html.

Excellent!

As for the root issue, #3 looks the most feasible, IMHO, and should
eliminate the problems of #2 if the kernel's fs dies (unless it could try
another drive) and yet would there not be an issue should the drive that
does the bootstrapping die and the system rebooted.  Small thing, not Vinum
related, but at least things would keep going when a mirrored root fs lost
a plex.

The "snapshot" feature is interesting as well.  Guess the logging changes
is not a wish (yet) and is somewhat similar.

Thanks,


Jeff Mountin - jeff@mountin.net
Systems/Network Administrator
FreeBSD - the power to serve
'86 Yamaha MaxiumX (not FBSD powered)



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