From owner-freebsd-current Sat Jan 31 14:05:49 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA14347 for current-outgoing; Sat, 31 Jan 1998 14:05:49 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from sumatra.americantv.com (sumatra.americantv.com [207.170.17.37]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id OAA14341 for ; Sat, 31 Jan 1998 14:05:47 -0800 (PST) (envelope-from jlemon@americantv.com) Received: from right.PCS (right.PCS [148.105.10.31]) by sumatra.americantv.com (8.8.5/8.8.5) with ESMTP id QAA15724; Sat, 31 Jan 1998 16:05:12 -0600 (CST) Received: (from jlemon@localhost) by right.PCS (8.6.13/8.6.4) id QAA17986; Sat, 31 Jan 1998 16:04:24 -0600 Message-ID: <19980131160423.30536@right.PCS> Date: Sat, 31 Jan 1998 16:04:24 -0600 From: Jonathan Lemon To: Karl Denninger Cc: Brian Tao , current@FreeBSD.ORG Subject: Re: RAID controllers - folks, check this thing out References: <19980131144604.03410@mcs.net> <19980131155527.19192@mcs.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.61.1 In-Reply-To: <19980131155527.19192@mcs.net>; from Karl Denninger on Jan 01, 1998 at 03:55:27PM -0600 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe current" On Jan 01, 1998 at 03:55:27PM -0600, Karl Denninger wrote: > RAID 5, due to the way it stripes parity across the volumes, has a "sweet > spot" in performance at 5 spindles. This is only true if your stripe set is 4 spindles. There's nothing wrong with using a stripe set of 8 spindles (9 devices), except that it tends to make small writes slower, since your data is spread out over more devices. 5 devices is not an inherent property of RAID 5, AFAIK. -- Jonathan