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Date:      Mon, 18 Mar 2002 11:20:24 +1030
From:      Greg Lehey <grog@FreeBSD.org>
To:        "Giles, George S" <george.giles@vanderbilt.edu>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Vinum Raid 5 Problem
Message-ID:  <20020318112024.B70252@wantadilla.lemis.com>
In-Reply-To: <482151146.1016354251@ci537698-a>
References:  <482151146.1016354251@ci537698-a>

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On Sunday, 17 March 2002 at  8:37:31 -0600, Giles, George S wrote:
>
> My system has three identical disks. The following config does not
> work:
>
> 1 volumes:
> V myRaidFive            State: down     Plexes:       1 Size: 8192 MB

Care to have a guess what "down" means?

> 1 plexes:
> P myRaidFive.p0      R5 State: init     Subdisks:     3 Size: 8192 MB

"init" may not be so obvious.  That's why it's described in the man
page:


     init [-S] size [-w] plex | subdisk

             vinum init initializes a subdisk by writing zeroes to it.  You
             can initialize all subdisks in a plex by specifying the plex
             name.  This is the only way to ensure consistent data in a plex.
             You must perform this initialization before using a RAID-5 plex.
             It is also recommended for other new plexes.  vinum initializes
             all subdisks of a plex in parallel.  Since this operation can
             take a long time, it is normally performed in the background.  If
             you want to wait for completion of the command, use the -w (wait)
             option.

             Specify the -S option if you want to write blocks of a different
             size from the default value of 16 kB.  vinum prints a console
             message when the initialization is complete.

Greg
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