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Date:      Wed, 29 Nov 2000 08:55:06 +0100 (CET)
From:      Soren Schmidt <sos@freebsd.dk>
To:        grog@lemis.com (Greg Lehey)
Cc:        webmaster@healthnet-sl.es (Carlos Amengual), freebsd-bugs@FreeBSD.ORG
Subject:   Re: kern/22086: DMA errors during intensive disk activity on vinum  volume
Message-ID:  <200011290755.IAA75175@freebsd.dk>
In-Reply-To: <20001129125251.D45540@echunga.lemis.com> from Greg Lehey at "Nov 29, 2000 12:52:51 pm"

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It seems Greg Lehey wrote:
> >
> > This is an old problem with vinum, somehow vinum manage to trash
> > the ad_request struct between where the ata drives makes it in
> > ad_strategy and when it actually gets used later..
> > I thought this was fixed at least in -current long ago, but
> > apparently this was either not backported to -stable or the fix
> > was not good enough.
> 
> No, the problem went into hiding.  It was you who thought it had gone
> away.

Yes, at a time, but back then we found out that fxp just accelerated
the problem, it did not create it.

> 1.  This config does not include an fxp device, which you had in the
>     past blamed for the problems:
> 
>     > Now, I'm not sure if its vinum or the fxp driver that has a
>     > problem, but since others have seen strange problems semilar to
>     > this on other type of systems, I'd say it points very much at
>     > fxp...  The latest fix you put into -current is needed though...

See above, I provided you with dumps and what not, but it newer
got past that. Since you removed your maintainer bit on vinum it
all went into a halt.  In the meantime I have decommisioned all 
the vinum boxes I had out there, fortunately all had either
promise or highpoint controllers so they now run ATA RAID's 
happily without any problems, so vinum is no longer an issue for
me at least...

> 2.  Robin seems to be able to work through the source code, so this
>     time we may be able to catch it.

More power to you :)

-Søren


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