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Date:      Thu, 9 Dec 2004 09:21:02 +0100
From:      Stijn Hoop <stijn@win.tue.nl>
To:        "Greg 'groggy' Lehey" <grog@FreeBSD.org>
Cc:        freebsd-questions@FreeBSD.org
Subject:   Re: Has anybody EVER successfully recovered VINUM?
Message-ID:  <20041209082102.GC58675@pcwin002.win.tue.nl>
In-Reply-To: <20041209020656.GG92212@wantadilla.lemis.com>
References:  <20041208054552.71553.qmail@web50708.mail.yahoo.com> <20041208100905.GA12684@tuatara.fishballoon.org> <20041208105255.GW39558@pcwin002.win.tue.nl> <20041209020656.GG92212@wantadilla.lemis.com>

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On Thu, Dec 09, 2004 at 12:36:56PM +1030, Greg 'groggy' Lehey wrote:
> On Wednesday,  8 December 2004 at 11:52:55 +0100, Stijn Hoop wrote:
> > AFAIK the only way to guarantee a consistent rebuild is to do it
> > offline (at least in 4.x, haven't tested gvinum in 5.x yet).
> >
> > > To play it safe you might want to unmount the volume before starting.
> >
> > I *have* to.
>=20
> The issue is contention round where stripes are being written.  The
> code *should* avoid the contention, but it appears that there's a bug
> there somewhere.  I certainly agree with you that you should umount
> the file system first.

Well, it is a workaround but certainly acceptable to me.

> There's no reason to believe that this problem exists in gvinum: I
> believe the code has been completely rewritten.

That is good to hear. I certainly have to further test gvinum RAID-5 in the
near future. Now that setstate, checkparity & rebuildparity have been
implemented there's not a technical reason not to, except for possible bugs.

--Stijn

--=20
"What kind of a two-bit operation are they running out of this treehouse,
 Cooper? I have seen some slipshod backwater burgs, but this place takes the
 cake."
		-- Special Agent Albert Rosenfield, "Twin Peaks"

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