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Date:      Thu, 4 Jan 2001 09:49:38 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Vallo Kallaste <vallo@matti.ee>
Cc:        Josef Karthauser <joe@tao.org.uk>, Thomas Seck <tmseck@web.de>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Vinum safe to use for raid 0?
Message-ID:  <20010104094938.B4336@wantadilla.lemis.com>
In-Reply-To: <20010103172844.D13221@myhakas.matti.ee>; from vallo@matti.ee on Wed, Jan 03, 2001 at 05:28:44PM %2B0200
References:  <20010102230107.A559@basildon.homerun> <20010103102943.A770@tao.org.uk> <20010103214829.X4336@wantadilla.lemis.com> <20010103172844.D13221@myhakas.matti.ee>

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On Wednesday,  3 January 2001 at 17:28:44 +0200, Vallo Kallaste wrote:
> On Wed, Jan 03, 2001 at 09:48:29PM +1030, Greg Lehey <grog@lemis.com> wrote:
>
>>> As far as I understand from Greg he's not aware of many people who
>>> are having problems with raid 5.
>>
>> Probably.  If you know of somebody I don't know of, please let me
>> know.
>
> For a while now I have a old spare Intel Madrona server. It has in
> current configuration one SCSI backplane with 5 SCA plugs and four
> Seagate Cheetah disks (old model: 4.3GB 10000rpm). The SCSI
> controller is onboard Symbios 875. I did some vinum raid-5 tests in
> November, all what I got was massive filesystem corruption and
> panics after the degraded volume got rebuilt. I'll probably have
> this box for yet two weeks or so and my time isn't so limited now,
> so.. What I can do to help you besides installing latest -stable? Do
> you have some formalized test procedures or anything to prove the
> stability of raid-5 configuration?

No testing can prove stability, only instability :-)  If you were able
to get file system corruption, go and check how you did it and see if
you can do it again.  Don't forget the information I asked for in
http://www.vinumvm.org/vinum/how-to-debug.html.

Greg
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