From owner-freebsd-stable Mon May 27 6:16:18 2002 Delivered-To: freebsd-stable@freebsd.org Received: from obsidian.sentex.ca (obsidian.sentex.ca [64.7.128.101]) by hub.freebsd.org (Postfix) with ESMTP id 1F0BC37B400 for ; Mon, 27 May 2002 06:16:13 -0700 (PDT) Received: from simoen.sentex.net (pyroxene.sentex.ca [199.212.134.18]) by obsidian.sentex.ca (8.12.2/8.12.2) with ESMTP id g4RDGB7U049533; Mon, 27 May 2002 09:16:11 -0400 (EDT) (envelope-from mike@sentex.net) Message-Id: <5.1.0.14.0.20020527091240.03ab9ba8@marble.sentex.ca> X-Sender: mdtpop@marble.sentex.ca X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Mon, 27 May 2002 09:18:19 -0400 To: Cy.Schubert@uumail.gov.bc.ca, Kirk Strauser From: Mike Tancsa Subject: Re: Hardware RAID vs vinum Cc: freebsd-stable@FreeBSD.ORG In-Reply-To: <200205271302.g4RD2Nr1099239@cwsys.cwsent.com> References: <87r8jy9ri6.fsf@pooh.int> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Virus-Scanned: By Sentex Communications (obsidian/20020220) Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 06:02 AM 27/05/2002 -0700, Cy Schubert - CITS Open Systems Group wrote: >The moral of the story: You get better mileage out of a hardware RAID >controller. But there are a number of factors that mitigate this. a) is the hardware on the card adequate. e.g. an old DAC-960 will not be as fast as vinum running on a P4. b) are the drivers any good c) how good is the software implementation of RAID. I posted to STABLE a while back comparing a couple of benchmarks that showed this not to always be the case. ---Mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message