Messages in this thread | | | Subject | Re: 2.6.3 BUG - can't write DVD-RAM - reported as write-protected | From | Olaf Frączyk <> | Date | Fri, 05 Mar 2004 12:45:59 +0100 |
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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.
Regards,
Olaf
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