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Date:      Mon, 21 Jan 2002 18:15:43 -0600
From:      Doug Poland <doug@polands.org>
To:        Tony Landells <ahl@austclear.com.au>
Cc:        tony <tony@tntpro.com>, questions@FreeBSD.ORG, grog@FreeBSD.ORG
Subject:   Re: faulty vinum plex, need help please
Message-ID:  <20020121181543.A3901@polands.org>
In-Reply-To: <200201212311.KAA01827@tungsten.austclear.com.au>; from ahl@austclear.com.au on Tue, Jan 22, 2002 at 10:11:11AM %2B1100
References:  <doug@polands.org> <200201212311.KAA01827@tungsten.austclear.com.au>

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On Tue, Jan 22, 2002 at 10:11:11AM +1100, Tony Landells wrote:
> doug@polands.org said:
> > So when the subdisks are revived, then the plex will automatically
> > come up, or must I start it?  Could you speculate as to why this
> > happened?  I'd like to understand what went wrong and how to avoid/fix
> > this in the future.
>
> The plex will automatically come up when all of its subdisks are up.
>
> This happened because it's supposed to happen.  This is in the vinum
> documentation, placed very logically, several pages too late to help
> someone who is trying to wing it from the documentation (hark to the
> voice of experience!) ;-)  In particular, look at the "Gotchas" and
> the "start" command.
>
> Read the documentation all the way through, and try to understand the
> examples, and it will all make much more sense.
>
Should probably do that before a disk fails :p


On Tue, Jan 22, 2002 at 09:57:17AM +1030, Greg Lehey wrote:
> >
> > So dataraid plex 1 appears to be faulty.  Is this a mis-configuration
> > on my part?
>
> No.
>
> > Is it hardware failure?
>
> No.
>
> > The read/write performance of the vinum volume does not appear to
> > have degraded, have I just lost the mirroring property?
>
> I suspect it was never mirrored.
>
> > I'll be thankful for any advice on how to diagnose and fix this situation.
>
> The man page (vinum (8)) is your friend:
>
> I'm surprised nobody else came up with this.  Since you have now
> newfs'd your volume, you did the right thing by using 'vinum start',
> though you could have simply done a 'vinum start dataraid.p1', which
> probably would also have been faster.
>

Thanks to all for your help.  Afer an hour of disk churning,
the second plex came on line.  I guess the moral of the story
is sophisticated tools in the hands of novices is a dangerous
thing :)

-- 
Regards,
Doug

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