From owner-freebsd-hackers Sun Nov 11 0:34:13 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from freebsd.dk (fw-rl0.freebsd.dk [212.242.86.114]) by hub.freebsd.org (Postfix) with ESMTP id 7CED437B422; Sun, 11 Nov 2001 00:33:58 -0800 (PST) Received: (from sos@localhost) by freebsd.dk (8.11.6/8.11.3) id fAB8Xun88149; Sun, 11 Nov 2001 09:33:56 +0100 (CET) (envelope-from sos) From: Søren Schmidt Message-Id: <200111110833.fAB8Xun88149@freebsd.dk> Subject: Re: HPT370 RAID or Vinum? In-Reply-To: <200111102227.fAAMRQV01034@mass.dis.org> To: Mike Smith Date: Sun, 11 Nov 2001 09:33:56 +0100 (CET) Cc: Greg Lehey , john_wilson100@excite.com, freebsd-hackers@FreeBSD.ORG, sos@FreeBSD.ORG Reply-To: sos@freebsd.dk X-Mailer: ELM [version 2.4ME+ PL94b (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1 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 It seems Mike Smith wrote: > > 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. There is no algorithm to speak of involved with striping, and just a little more in mirroring in the error case, but anyways.. > The "algorithms" are in the 'ar' driver, which should really just be a > vinum shim. Well, the way vinum is implemented that wont work unfortunately. -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message