From owner-freebsd-fs Sun Nov 8 19:56:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA03238 for freebsd-fs-outgoing; Sun, 8 Nov 1998 19:56:43 -0800 (PST) (envelope-from owner-freebsd-fs@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA03230 for ; Sun, 8 Nov 1998 19:56:40 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id OAA11005; Mon, 9 Nov 1998 14:26:01 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id OAA11200; Mon, 9 Nov 1998 14:26:01 +1030 (CST) Message-ID: <19981109142601.F499@freebie.lemis.com> Date: Mon, 9 Nov 1998 14:26:01 +1030 From: Greg Lehey To: "Justin T. Gibbs" Cc: "Kenneth D. Merry" , bill@bilver.magicnet.net, freebsd-fs@FreeBSD.ORG Subject: Re: RAID1 Software vs Hardware References: <19981108173920.N499@freebie.lemis.com> <199811080724.AAA03989@pluto.plutotech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <199811080724.AAA03989@pluto.plutotech.com>; from Justin T. Gibbs on Sun, Nov 08, 1998 at 12:17:36AM -0700 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Sunday, 8 November 1998 at 0:17:36 -0700, Justin T. Gibbs wrote: >>> RAID 3 is still used, and is still useful. All of Pluto's products (see >>> http://www.plutotech.com) use RAID 3. It works quite well for video data. >> >> I suppose it gives you good throughput. But how do you handle the I/O >> load? Are you effectively delivering a single video stream? > > RAID 3 is ideal when your data requests are always a multiple of the strip > size. I'm not sure we're talking about the same thing. In my book, RAID-3 is a RAID-4 with a stripe size of 1 byte. How do you define it? Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message