From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hadmut Danisch Subject: Re: aic79xx and RAID ? Date: Thu, 1 Dec 2005 11:48:05 +0100 Message-ID: <20051201104805.GA3893@danisch.de> References: <20051201102039.GA23336@danisch.de> <1133433450.2853.25.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from sklave3.rackland.de ([213.133.101.23]:52178 "EHLO sklave3.rackland.de") by vger.kernel.org with ESMTP id S1750754AbVLAKsK (ORCPT ); Thu, 1 Dec 2005 05:48:10 -0500 Content-Disposition: inline In-Reply-To: <1133433450.2853.25.camel@laptopd505.fenrus.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Arjan van de Ven Cc: linux-scsi@vger.kernel.org Hi, thanks for the fast reply. :-) On Thu, Dec 01, 2005 at 11:37:30AM +0100, Arjan van de Ven wrote: > > ah one of the software raid controllers > .. > this is in principle the right thing for this kind of software raid. > the dmraid tool is there to support this type of software raid (bios > supported raid) but I don't think it supports adaptec raid yet... 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? But I guess we have to use software (i.e. kernel driven, mdadm) raid then? regards Hadmut