From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: Re: ide dvd burner detected as ide-tape Date: Thu, 9 Oct 2008 20:50:09 +0200 Message-ID: <200810092050.09576.bzolnier@gmail.com> References: <200810010100.06299.th@drillich.com> <200810092013.50945.bzolnier@gmail.com> <20081009183925.GA24460@psychosis.jim.sh> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from an-out-0708.google.com ([209.85.132.240]:10971 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753407AbYJISw7 (ORCPT ); Thu, 9 Oct 2008 14:52:59 -0400 Received: by an-out-0708.google.com with SMTP id d40so15552and.103 for ; Thu, 09 Oct 2008 11:52:58 -0700 (PDT) In-Reply-To: <20081009183925.GA24460@psychosis.jim.sh> Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jim Paris Cc: Thomas Drillich , linux-hotplug@vger.kernel.org, linux-ide@vger.kernel.org On Thursday 09 October 2008, Jim Paris wrote: > Bartlomiej Zolnierkiewicz wrote: > > Thanks. Does the following patch help? > > > > From: Bartlomiej Zolnierkiewicz > > Subject: [PATCH] ide: quirk for LG GH22LP20 DVD burner > > > > LG GH22LP20 DVD burner ("HL)DP-ST@V@-RAI CH22HP20") with firmware 1.00 > > reports 0x01 ("Sequential-access device") as the peripheral device type > > instead of 0x05 ("CD-ROM device"). > > That looks more like a hardware problem with a flakey bit. > For example GH22LP20 with bit 2 always cleared = CH22HP20. > DVD-ROM with bit 2 sometimes cleared = @V@-RAI. > And the peripheral device type also has bit 2 cleared. This would explain it nicely (I suspected something along these lines but failed to see the actual pattern). After all it is very unlikely to have _that_ broken firmware. Thanks, Bart