Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261807AbUCGK7P (ORCPT ); Sun, 7 Mar 2004 05:59:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261813AbUCGK7P (ORCPT ); Sun, 7 Mar 2004 05:59:15 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:27308 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S261807AbUCGK7N (ORCPT ); Sun, 7 Mar 2004 05:59:13 -0500 Date: Sun, 7 Mar 2004 11:59:11 +0100 From: Jens Axboe To: Olaf Fr?czyk Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.3 BUG - can't write DVD-RAM - reported as write-protected Message-ID: <20040307105911.GH23525@suse.de> References: <1078434953.1961.13.camel@venus.local.navi.pl> <20040305082350.GO31750@suse.de> <1078487159.3300.23.camel@venus.local.navi.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1078487159.3300.23.camel@venus.local.navi.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2742 Lines: 79 On Fri, Mar 05 2004, Olaf Fr?czyk wrote: > On Fri, 2004-03-05 at 09:23, Jens Axboe wrote: > > On Thu, Mar 04 2004, Olaf Fr?czyk wrote: > > > Hi, > > > I switched to 2.6.3 from 2.4.x serie. > > > When I mount DVD-RAM it is mounted read-only: > > > > > > [root@venus olaf]# mount /dev/dvdram /mnt/dvdram > > > mount: block device /dev/dvdram is write-protected, mounting read-only > > > [root@venus olaf]# > > > > > > In 2.4 it is mounted correctly as read-write. > > > > > > Drive: Panasonic LF-201, reported in Linux as: > > > MATSHITA DVD-RAM LF-D200 A120 > > > > > > SCSI controller: Adaptec 2940U2W > > > > What does cat /proc/sys/dev/cdrom/info say? Do you get any kernel > > messages in dmesg when the rw mount fails? > > I get nothing in /var/log/dmesg and in /var/log/messages > In /proc/sys/dev/cdrom/info I get: > [olaf@venus olaf]$ cat /proc/sys/dev/cdrom/info > CD-ROM information, Id: cdrom.c 3.20 2003/12/17 > > drive name: sr1 sr0 hdc > drive speed: 0 16 44 > drive # of slots: 1 1 1 > Can close tray: 1 1 1 > Can open tray: 1 1 1 > Can lock tray: 1 1 1 > Can change speed: 1 1 1 > Can select disk: 0 0 0 > Can read multisession: 1 1 1 > Can read MCN: 1 1 1 > Reports media changed: 1 1 1 > Can play audio: 1 1 1 > Can write CD-R: 0 1 1 > Can write CD-RW: 0 1 1 > Can read DVD: 1 0 0 > Can write DVD-R: 0 0 0 > Can write DVD-RAM: 1 0 0 > Can read MRW: 0 0 1 > Can write MRW: 0 0 1 > > The one I'm mounting is /dev/scd1. > As there is capablity to write-protect DVD-RAM disk (like a 1.44" > Floppy), I think that the linux kernel interprets some message from > device in wrong way. Please repeat with this patch applied and send back the results, thanks. ===== drivers/cdrom/cdrom.c 1.48 vs edited ===== --- 1.48/drivers/cdrom/cdrom.c Mon Feb 9 21:58:21 2004 +++ edited/drivers/cdrom/cdrom.c Sun Mar 7 11:58:40 2004 @@ -645,9 +645,12 @@ { disc_information di; - if (cdrom_get_disc_info(cdi, &di)) + if (cdrom_get_disc_info(cdi, &di)) { + printk("cdrom: read di failed\n"); return 0; + } + printk("cdrom: erasable: %d\n", di.erasable); return di.erasable; } -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/