From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: aic79xx and RAID ? Date: Thu, 01 Dec 2005 06:39:25 -0500 Message-ID: <438EE0ED.7000605@pobox.com> References: <20051201102039.GA23336@danisch.de> <1133433450.2853.25.camel@laptopd505.fenrus.org> <20051201104805.GA3893@danisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.dvmed.net ([216.237.124.58]:451 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S932167AbVLALjf (ORCPT ); Thu, 1 Dec 2005 06:39:35 -0500 In-Reply-To: <20051201104805.GA3893@danisch.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Hadmut Danisch Cc: Arjan van de Ven , linux-scsi@vger.kernel.org Hadmut Danisch wrote: > A software raid controller? Never heard of such a beast before. > > > I always thought that there are exactly two ways to do raid, > one way is to have it all hidden in the controller, which makes the > RAID mirror appear as just a single disk to the kernel, > and the other way is to use the kernel software raid (configured with > mdadm). > > I've never heard of a software raid controller, where the kernel must > do the work itself. After all, what's the controller's job and > why is it called a RAID controller then? Marketing. Read http://linux.yyz.us/sata/faq-sata-raid.html Jeff