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Date:      Wed, 5 Feb 1997 09:25:03 +1030 (CST)
From:      Michael Smith <msmith@atrad.adelaide.edu.au>
To:        dave@persprog.com (David Alderman)
Cc:        hardware@freebsd.org
Subject:   Re: 2G SCSI disks?
Message-ID:  <199702042255.JAA16730@genesis.atrad.adelaide.edu.au>
In-Reply-To: <199702041839.NAA06190@persprog.com> from David Alderman at "Feb 4, 97 01:38:57 pm"

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David Alderman stands accused of saying:
> On  5 Feb 97 at 0:05, Michael Smith proclaimed:
> 
> > > Remind yourself that there's a reason RAID towers don't use SCSI
> > > drives...
> > 
> > Yeah, they're cheap and stupid, so you don't have to second-guess them.
> 
> You guys did mean IDE above, right?  I have never seen an IDE RAID 
> system (and I hope I never do).  

I've seen a number of RAID controllers that use IDE disks (they have
SCSI host interfaces, naturally).  IDE disks are an excellent choice -
they're cheap, and because they're extremely stupid, they're nice and
deterministic, which mans you can put all your smarts in the cluster
controller and achieve a greater degree of control over the members of
the array.

Of course the opposite argument is that SCSI array members beat the
pants off IDE members performance-wise.

> Dave Alderman  -- dave@persprog.com
-- 
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