From owner-freebsd-hackers Sat Nov 10 14:25:57 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mass.dis.org (mass.dis.org [216.240.45.41]) by hub.freebsd.org (Postfix) with ESMTP id 165C737B416; Sat, 10 Nov 2001 14:25:54 -0800 (PST) Received: from mass.dis.org (localhost [127.0.0.1]) by mass.dis.org (8.11.6/8.11.3) with ESMTP id fAAMRQV01034; Sat, 10 Nov 2001 14:27:26 -0800 (PST) (envelope-from msmith@mass.dis.org) Message-Id: <200111102227.fAAMRQV01034@mass.dis.org> X-Mailer: exmh version 2.1.1 10/15/1999 To: Greg Lehey Cc: =?iso-8859-1?Q?S=F8ren_Schmidt?= , john_wilson100@excite.com, freebsd-hackers@FreeBSD.org, sos@FreeBSD.org Subject: Re: HPT370 RAID or Vinum? In-reply-to: Your message of "Wed, 07 Nov 2001 04:01:35 GMT." <20011107040135.E339@sydney.worldwide.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Date: Sat, 10 Nov 2001 14:27:26 -0800 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > > And why is that ? for RAID's with the same parameters, I'd expect the= m > > to perform equal, maybe with a sligtht advantage to the ATA driver si= nce it > > saves a few cycles by being tighter integrated. > = > Agreed. I don't think the RAIDs will have the same parameters. Most > of these cheap controllers have fairly simplistic algorithms. Note > that I said "guess", though. In my language, that means "don't know > for sure". I'd really like to see some objective benchmarks. Er. These "cheap controllers" don't have any algorithms at all to speak of; = they're just ATA controllers with BIOS code that supposedly understands = striping/mirroring. The "algorithms" are in the 'ar' driver, which should really just be a = vinum shim. -- = =2E.. every activity meets with opposition, everyone who acts has his rivals and unfortunately opponents also. But not because people want to be opponents, rather because the tasks and relationships force people to take different points of view. [Dr. Fritz Todt] V I C T O R Y N O T V E N G E A N C E To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message