From owner-freebsd-stable Sun May 26 20:53: 8 2002 Delivered-To: freebsd-stable@freebsd.org Received: from kanga.honeypot.net (kanga.honeypot.net [208.162.254.122]) by hub.freebsd.org (Postfix) with ESMTP id 60FF237B405 for ; Sun, 26 May 2002 20:52:44 -0700 (PDT) Received: from pooh.int (mail@pooh.int [10.0.1.2]) by kanga.honeypot.net (8.12.3/8.12.3) with ESMTP id g4R3qamS038699 for ; Sun, 26 May 2002 22:52:36 -0500 (CDT) (envelope-from kirk@strauser.com) Received: from kirk by pooh.int with local (Exim 3.35 #1 (Debian)) id 17CBYg-0002bs-00 for ; Sun, 26 May 2002 22:52:34 -0500 To: freebsd-stable@freebsd.org Subject: Re: Hardware RAID vs vinum References: <004701c20530$68e98a20$0700a8c0@zoom> From: Kirk Strauser Date: 26 May 2002 22:52:33 -0500 In-Reply-To: <004701c20530$68e98a20$0700a8c0@zoom> Message-ID: <87r8jy9ri6.fsf@pooh.int> Lines: 18 X-Mailer: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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 2002-05-27T03:41:39Z, "Phil Rosenthal" writes: > Is there any reason why a hardware raid would be better, am I missing out > on anything? In theory, a hardware RAID should give you better CPU utilization. After all, a seperate processor (or DSP, etc.) would be doing all of the work that your main CPU is currently doing. Furthermore, your CPU would be able to forget about all of the extra abstractions of Vinum, such as plexes, subdisks, and so on - the RAID could look like one single harddrive. In reality, I don't think that the RAID controllers would protect the CPU from nearly so much work, and I'm almost positive that your CPU will be orders of magnitude faster than the processor on the controllers. -- Kirk Strauser The Strauser Group - http://www.strausergroup.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message