From owner-freebsd-fs Thu Nov 4 15:34:54 1999 Delivered-To: freebsd-fs@freebsd.org Received: from kronos.alcnet.com (kronos.alcnet.com [63.69.28.22]) by hub.freebsd.org (Postfix) with ESMTP id 07E661518A for ; Thu, 4 Nov 1999 15:34:49 -0800 (PST) (envelope-from kbyanc@posi.net) X-Provider: ALC Communications, Inc. http://www.alcnet.com/ Received: from localhost (kbyanc@localhost) by kronos.alcnet.com (8.9.3/8.9.3/antispam) with ESMTP id SAA22104; Thu, 4 Nov 1999 18:33:24 -0500 (EST) Date: Thu, 4 Nov 1999 18:33:24 -0500 (EST) From: Kelly Yancey X-Sender: kbyanc@kronos.alcnet.com To: Greg Lehey Cc: Bernd Walter , Mattias Pantzare , freebsd-fs@FreeBSD.ORG Subject: Re: feature list journalled fs In-Reply-To: <19991104174750.37515@mojave.sitaranetworks.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 4 Nov 1999, Greg Lehey wrote: > > That's for writing. When throughput becomes the limit, the write > throughput of RAID-4 is limited to about 2 / n of the write throughput > of RAID-5. On reading (randomly), it's (n - 1) / n. > I think that it has been significantly proven that RAID 4 is not very userful, and I regret bringing it up...sometimes the mind wonders :). Kelly -- Kelly Yancey - kbyanc@posi.net - Richmond, VA Director of Technical Services, ALC Communications http://www.alcnet.com/ Maintainer, BSD Driver Database http://www.posi.net/freebsd/drivers/ Coordinator, Team FreeBSD http://www.posi.net/freebsd/Team-FreeBSD/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message