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Date:      Wed, 23 Jul 1997 10:40:14 +0200
From:      Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de>
To:        =?iso-8859-1?Q?S=F8ren_Schmidt?= <sos@sos.freebsd.dk>
Cc:        Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de>, freebsd-hardware@FreeBSD.ORG
Subject:   Re: building RAID systems
Message-ID:  <19970723104014.09599@gil.physik.rwth-aachen.de>
In-Reply-To: =?iso-8859-1?Q?=3C199707230749=2EJAA21433=40sos=2Efreebsd=2Edk=3E=3B_fro?= =?iso-8859-1?Q?m_S=F8ren_Schmidt_=3Csos=40sos=2Efreebsd=2Edk=3E_on_Wed?= =?iso-8859-1?Q?=2C_Jul_23=2C_1997_at_09=3A49=3A59AM_%2B0200?=
References:  <199707230652.IAA04056@gil.physik.rwth-aachen.de> <199707230749.JAA21433@sos.freebsd.dk>

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On Wed, Jul 23, 1997 at 09:49:59AM +0200, Søren Schmidt wrote:
> In reply to Christoph Kukulies who wrote:
> > 
> > Does anyone have a pointer to a recipe to build up
> > a RAID system?
> > 
> > a) what controllers are there?
> > 
> > b) can one build such systems of cheapo IDE drives?
> > 
> > (with FreeBSD having control over it - of course)
> 
> You could put 4x7gigs EIDE drives on the two EIDE channels on
> a modern motherboard. The run CCD to concat them together to
> one 28gig drive :)

Thought of this, too, but this doesn't give me RAID advantages
like hot swapping of media and 28 GB isn't enough, anyway :-)

> 
> I do this with two 4gig MAXTOR's, one on each channel of cause,
> works like a charm, and have given me 8gigs for US$ 500 ....

I have a 3+3GB ccd drive on cvsup.de.freebsd.org myself using
two (though slow) quantum 3GB scsi drives attached to ncr controllers
and despite of occasional scsi command timeouts which I havn't
tracked down yet,  it's working nice. BTW, how does one
increase an existing 6GB ccd drive on the fly' (I mean without
backing up the data) ? (assumed answer: impossible)

> 
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> Søren Schmidt               (sos@FreeBSD.org)               FreeBSD Core Team
>                 Even more code to hack -- will it ever end
> ..

-- 
Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de



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