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Thread: device (CD) is write-protected??

  1. #1
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    CDROM won't mount.

    I'm having an issue with my cd/dvd/blu-ray

    luke@luke-dell:~$ sudo mount /dev/sr0 /media/cdrom
    mount: block device /dev/sr0 is write-protected, mounting read-only

    Any help?
    Last edited by wlraider70; January 23rd, 2010 at 06:26 PM.
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  2. #2
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    Re: device (CD) is write-protected??

    Quote Originally Posted by wlraider70 View Post
    I'm having an issue with my cd/dvd/blu-ray

    luke@luke-dell:~$ sudo mount /dev/sr0 /media/cdrom
    mount: block device /dev/sr0 is write-protected, mounting read-only

    Any help?
    Er - I don't see what the problem is. CD's (DVD's, etc) *are* "read-only" discs, so mounting them read-only makes sense.

    Are you trying to write to a CD-R? If so, use the program "Brasero" to build and burn the image to the CD.

    Lloyd B.
    Don't tell me to get a life.
    I had one once.
    It sucked.

  3. #3
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    Re: device (CD) is write-protected??

    lol that true.

    I'm having an issue keeping the drive mounted.
    perhaps that is not why, i was thinking that it was referring to an inability to properly use the drive.

    Regardless, i've gotten this error too, see screen shot

    ans it currently is not showing up in the computer.


    it seems to work best when i first boot, but it is NOT functioning properly.
    Attached Images Attached Images
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  4. #4
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    Re: device (CD) is write-protected??

    maybe some of this will help show the error

    Code:
    luke@luke-dell:~$ sudo mount /dev/sr0 /media/cdrom
    [sudo] password for luke: 
    mount: block device /dev/sr0 is write-protected, mounting read-only
    mount: /dev/sr0 already mounted or /media/cdrom busy
    mount: according to mtab, /dev/sr0 is already mounted on /media/cdrom0
    luke@luke-dell:~$ cd /
    luke@luke-dell:/$ cd media
    luke@luke-dell:/media$ cd cdrom0
    bash: cd: cdrom0: Permission denied
    luke@luke-dell:/media$ sudo cd cdrom0
    sudo: cd: command not found
    luke@luke-dell:/media$ cd cdrom0
    bash: cd: cdrom0: Permission denied


    or this


    Code:
    luke@luke-dell:/media$ df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/sda5              20G  3.6G   16G  19% /
    udev                  2.0G  332K  2.0G   1% /dev
    none                  2.0G  200K  2.0G   1% /dev/shm
    none                  2.0G   88K  2.0G   1% /var/run
    none                  2.0G     0  2.0G   0% /var/lock
    none                  2.0G     0  2.0G   0% /lib/init/rw
    /dev/sda6              75G  4.6G   66G   7% /home
    /dev/sr0              2.1G  2.1G     0 100% /media/cdrom0
    luke@luke-dell:/media$


    another error i get from the GUI says

    Unable to mount location

    DBus error org.gtk.private.remotevolumemonitor.failed: An operation is already pending
    Last edited by wlraider70; January 18th, 2010 at 03:08 AM.
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  5. #5
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    Re: device (CD) is write-protected??

    maybe some of this will help show the error
    Code:
    luke@luke-dell:~$ sudo mount /dev/sr0 /media/cdrom
    [sudo] password for luke: 
    mount: block device /dev/sr0 is write-protected, mounting read-only
    mount: /dev/sr0 already mounted or /media/cdrom busy
    mount: according to mtab, /dev/sr0 is already mounted on /media/cdrom0
    luke@luke-dell:~$ cd /
    luke@luke-dell:/$ cd media
    luke@luke-dell:/media$ cd cdrom0
    bash: cd: cdrom0: Permission denied
    luke@luke-dell:/media$ sudo cd cdrom0
    sudo: cd: command not found
    luke@luke-dell:/media$ cd cdrom0
    bash: cd: cdrom0: Permission denied
    Okay - the mount is failing because "/dev/sr0" is *already* mounted at "/media/cdrom0", but there's a permissions issue that's preventing you from even reading that directory.

    For your command line stuff, try this:
    Code:
    sudo -i
    cd /media/cdrom0
    ls
    The "sudo -i" will give you a "root shell", making it look like you had logged in as root (your "sudo cd ..." command will not work - at best it would change to that directory, but then immediately exit, which would put you back where you started).

    Could you post the output of your "/etc/fstab" file, please? *Something* is telling it to mount the CD at /media/cdrom0, with very restrictive permissions, and that's the first place to look.

    Lloyd B.
    Don't tell me to get a life.
    I had one once.
    It sucked.

  6. #6
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    Re: device (CD) is write-protected??

    here is fstab

    Code:
    # /etc/fstab: static file system information.
    #
    # Use 'blkid -o value -s UUID' to print the universally unique identifier
    # for a device; this may be used with UUID= as a more robust way to name
    # devices that works even if disks are added and removed. See fstab(5).
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    proc            /proc           proc    defaults        0       0
    # / was on /dev/sda5 during installation
    UUID=76c58240-4834-4499-b222-c53717a842a0 /               ext4    errors=remount-ro 0       1
    # /home was on /dev/sda6 during installation
    UUID=5b94d663-cf6a-4508-a145-ac1c7c013613 /home           ext3    defaults        0       2
    # swap was on /dev/sda7 during installation
    UUID=a6501fdb-6896-48d2-9aa1-b2b92fd8a399 none            swap    sw              0       0
    /dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec,utf8 0       0

    After you gave me a starting point i started playing with the mount points and such. I have found that.

    1. the ubuntu install disk can Mount and open and copy.

    2. A commercial DVD can mount and it allows me to open a video player, but it wont play. I get error: "could not read from source".

    3. my "home made" DVD appears to mount twice automatically, if use mount command i can get to the point of browsing it, but not file opening or transferring.

    4. in /media is cdrom, cdrom0. everything seems to mount to cdrom0.

    I tried chmod 777 on both cdrom and cdrom0, but i don't think it took.
    when i did ls, the colors did not match. I'm assuming the folder color is an indicator of accessibility.



    ...still stuck



    update:

    If i run nautilus as root i can access and even view a bit of the files.
    Last edited by wlraider70; January 19th, 2010 at 10:43 PM. Reason: update:
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  7. #7
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    Re: device (CD) is write-protected??

    bump
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  8. #8
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    Re: device (CD) is write-protected??

    i still need the helps...
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  9. #9
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    Re: device (CD) is write-protected??

    help me....
    I don' really like coffee. I guess I'll give my Ubuntu beans to my wife.

    Luke

  10. #10
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    Re: device (CD) is write-protected??

    Basically, what you're talking about is true, and unfortunately I haven't had the success of trying it. But, I did find that if you install xfburner and run it through terminal, it works like a charm. Sometimes your disk might have data on it from a previous config. try - using another clean, blank disk !! !! !! !! !!

    Hope your image burning goes well !>

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