Can't mount cdrom anymore

From: Nils Trebing (prefix.debian.20.ntrebing_at_spamgourmet.com)
Date: 09/17/03

  • Next message: NL-Hamburg_at_akzent-personal.de: "Re: Details" 
    Date: Wed, 17 Sep 2003 17:06:48 +0200
To: debian-user@lists.debian.org

    Hi,

    since I have added a second hard disk to my system (Debian testing
    unstable, kernel 2.4.21, i686), I cannot mount my ATAPI cdrom drive (a
    SAMSUNG CD-ROM SCR-3232 VH102) anymore. I get this on the console:

    root@obelix:~# mount -t iso9660 /dev/scd1 /cdrom
    mount: block device /dev/scd1 is write-protected, mounting read-only
    I/O error: dev 0b:01, sector 64
    isofs_read_super: bread failed, dev=0b:01, iso_blknum=16, block=32
    mount: wrong fs type, bad option, bad superblock on /dev/scd1,
           or too many mounted file systems
    root@obelix:~#

    As you can see, I have enabled ide-scsi emulation, and it's the slave on
    the secondary IDE bus. However, I can mount my cd writer which is the
    master on the secondary IDE bus without any problems.

    I am not aware of having broken anything when I added the second hard
    disk; even more so as I can mount/use this cdrom when running Knoppix
    and also when running Windows 98. I can also play audio cd's on my
    Debian system using this cdrom drive.

    Let's look in the dev directory:

    root@obelix:/dev# ls -l cdrom cdrw scd0 scd1
    lrwxrwxrwx    1 root     root            9 Sep 17 16:34 cdrom -> /dev
    scd1
    lrwxrwxrwx    1 root     root            9 Sep 17 16:34 cdrw -> /dev
    scd0
    brw-rw----    1 root     cdwriter  11,   0 Feb 19  2003 scd0
    brw-rw----    1 root     cdwriter  11,   1 Feb 19  2003 scd1
    root@obelix:/dev#

    This seems all right to me; both drives seem to be configured
    identically, but cdrw works and cdrom does not. So I am a bit lost and
    have no idea what could be wrong in my configuration, and I don't
    understand the ".isofs_read_super: bread failed, dev=0b:01,
    iso_blknum=16, block=32" error message. I have already tried turning
    off ide-scsi emulation, which did not help; neither did making the
    cdrom drive slave and the cdrw drive master as I have done today
    (before that, cdrw was slave and cdrom was master).

    Please let me know if I'm missing something obvious, if you know what's
    wrong, whether I should include additional information or if you can
    help otherwise.

    TIA,

    Nils 

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