From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261947AbTJIJ3G (ORCPT ); Thu, 9 Oct 2003 05:29:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261956AbTJIJ3G (ORCPT ); Thu, 9 Oct 2003 05:29:06 -0400 Received: from c-36a870d5.037-69-73746f23.cust.bredbandsbolaget.se ([213.112.168.54]:900 "EHLO ford.pronto.tv") by vger.kernel.org with ESMTP id S261947AbTJIJ24 (ORCPT ); Thu, 9 Oct 2003 05:28:56 -0400 To: Andre Tomt Cc: linux-kernel@vger.kernel.org Subject: Re: Software RAID5 with 2.6.0-test References: <1065655452.13572.50.camel@torrey.et.myrio.com> <1065660704.848.10.camel@slurv> <1065690658.10389.19.camel@slurv> From: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Date: Thu, 09 Oct 2003 11:28:49 +0200 In-Reply-To: <1065690658.10389.19.camel@slurv> (Andre Tomt's message of "Thu, 09 Oct 2003 11:10:59 +0200") Message-ID: User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Rational FORTRAN, linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andre Tomt writes: >> > Was this a 4 port or 2 port HPT controller? Keep in mind, two disks on >> > the same IDE channel severely degrades performance, *especially* with >> > RAID. >> >> It's a four port SATA controller. I'd never even think about placing >> two disks on the same cable. > > You can't either, considering it is SATA :-) > > However, I wouln't count on superior performance from software based > RAID 5 (ata/fakeraid or otherwise), that is whats real raid controllers > are for. I've seen reports of people obtaining nearly 100 MB/s from software RAID5. > Out of couriosity, how well is it performing in lets say.. a RAID10 or > RAID1 setup? I didn't try. I might, of course. -- Måns Rullgård mru@users.sf.net