From owner-freebsd-current@FreeBSD.ORG Thu May 6 02:22:30 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D121816A4CE; Thu, 6 May 2004 02:22:30 -0700 (PDT) Received: from VARK.homeunix.com (adsl-68-124-137-57.dsl.pltn13.pacbell.net [68.124.137.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4E54C43D2D; Thu, 6 May 2004 02:22:30 -0700 (PDT) (envelope-from das@FreeBSD.ORG) Received: from VARK.homeunix.com (localhost [127.0.0.1]) by VARK.homeunix.com (8.12.10/8.12.10) with ESMTP id i469MIAd068357; Thu, 6 May 2004 02:22:18 -0700 (PDT) (envelope-from das@FreeBSD.ORG) Received: (from das@localhost) by VARK.homeunix.com (8.12.10/8.12.10/Submit) id i469MI6Z068356; Thu, 6 May 2004 02:22:18 -0700 (PDT) (envelope-from das@FreeBSD.ORG) Date: Thu, 6 May 2004 02:22:18 -0700 From: David Schultz To: Scott Long Message-ID: <20040506092218.GA30797@VARK.homeunix.com> Mail-Followup-To: Scott Long ,, current@FreeBSD.ORG References: <200405041825.i44IPgVa021573@ambrisko.com> <4097F9EA.1080904@DeepCore.dk> <20040505124349.GA612@VARK.homeunix.com> <40990479.6070809@DeepCore.dk> <20040505194949.GA2443@VARK.homeunix.com> <40994763.4090203@DeepCore.dk> <20040505200911.GA2752@VARK.homeunix.com> <40994C5C.1050904@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <40994C5C.1050904@freebsd.org> cc: "=?us-ascii@FreeBSD.ORG"@FreeBSD.ORG cc: current@FreeBSD.ORG cc: iso-8859-1?Q?S=F8ren?= Schmidt Subject: Re: Updated SATA support patches for Intel ICH & Promise cards X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 May 2004 09:22:30 -0000 On Wed, May 05, 2004, Scott Long wrote: > David Schultz wrote: > >On Wed, May 05, 2004, Sren Schmidt wrote: > > > >>David Schultz wrote: > >> > >>>I have two SATA drives that are mirrored via ccd(4). The > >>>mirroring apparently introduced some sort of race that led to > >>>problems, which started when ATAng was committed. The specific > >>>symptoms changed as the ata driver evolved, and varied from kernel > >>>panics in the best case and data corruption in the worst case. > >>>But the details of the problem aren't as important as the fact > >>>that some aspect of Doug's patch fixes them! > >> > >>Have you considered using atacontrol to create an ATA RAID instead ? > >>Does that work ? on an unpatched kernel ? > > > > > >This is an Intel 875P motherboard, and I think the controller only > >supports striping, not mirroring. If this is not the case, I'd > >happily try it, although it would take a while for me to find the > >time to back up and migrate my data if there are any > >incompatibilities. > > The ICH5 controller on the southbridge has no concept of RAID. It's > just a SATA/IDE controller. Your motherboard might have a BIOS that > understands striping and/or mirroring the two SATA disks, but that is > a purely software function and has nothing to do with the disk > controllers. > > I find with much chagrin how effective the marketing campaigns are for > software RAID these days ;-) Heh. When I bought the motherboard, the documentation claimed it supported RAID 0. I didn't care about RAID 0 so I didn't investigate further. I just checked Intel's website, and it appears that that selfsame motherboard now supports RAID 0 *and* RAID 1. I guess that just means Intel's newer BIOSes have boot-time support for mirroring. The scumbags don't mention anywhere that this is software RAID...