From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262223AbVGVXTp (ORCPT ); Fri, 22 Jul 2005 19:19:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262220AbVGVXRe (ORCPT ); Fri, 22 Jul 2005 19:17:34 -0400 Received: from e2.ny.us.ibm.com ([32.97.182.142]:9926 "EHLO e2.ny.us.ibm.com") by vger.kernel.org with ESMTP id S262217AbVGVXR0 (ORCPT ); Fri, 22 Jul 2005 19:17:26 -0400 Message-ID: <42E17E7B.6090805@us.ibm.com> Date: Fri, 22 Jul 2005 16:17:15 -0700 From: "Darrick J. Wong" User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050404) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] serverworks should not take ahold of megaraid'd controllers References: <42E023B2.5030900@us.ibm.com> <1121993194.854.14.camel@localhost.localdomain> In-Reply-To: <1121993194.854.14.camel@localhost.localdomain> X-Enigmail-Version: 0.91.0.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigCAC76465A93FDC269A56172B" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigCAC76465A93FDC269A56172B Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Arjan, Alan: I didn't know that dmraid supports MegaIDE nowadays. Thanks for the tipoff, and I apologize for the unnecessary traffic. I'll look into dmraid. --D Alan Cox wrote: > On Iau, 2005-07-21 at 15:37 -0700, Darrick J. Wong wrote: > >>I've noticed what might be a small bug with the serverworks driver in >>2.6.12.3. The IBM HS20 blade has a ServerWorks CSB6 IDE controller with >>an optional LSI MegaIDE RAID BIOS (BIOS assisted software raid, iow). > > > With a binary only proprietary driver. > > >>(ServerWorks) to IBM. However, the serverworks driver doesn't notice >>this and will attach to the controller anyway, thus allowing raw access >>to the disks in the RAID. An unsuspecting user can then read and write >>whatever they want to the drive, which could very well degrade or >>destroy the array, which is clearly not desirable behavior. > > > It may be appropriate for some vendor situations but it isn't > appropriate for the base kernel to default to assuming the user wants to > use binary only drivers instead of dmraid. Especially as the raid > formats for this hardware are partially known despite no assistance I > know of from the vendor. > > Alan > > --------------enigCAC76465A93FDC269A56172B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC4X57a6vRYYgWQuURAgqKAJwIJ0DNjCbQGjY6tloriFBzJSvUzQCeMpF8 1kIuPjwcHSoeEoe4/NIdfEE= =WXjk -----END PGP SIGNATURE----- --------------enigCAC76465A93FDC269A56172B--