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Thread: DVDs mount CDs don't

  1. #1
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    DVDs mount CDs don't

    My cdrom has developed a strange problem. It will mount and play DVDs but says Unable to scan CD-RW/DVD+-RW Drive for media changes. In the text blow it suggests a possible cause might be 'message bus security policy blocked the reply'

    Does anybody know what is wrong?

  2. #2
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    Re: DVDs mount CDs don't

    I tried $mount cdrom and got

    Code:
    ***@laptop:~$ mount cdrom
    mount: can't find cdrom in /etc/fstab or /etc/mtab
    Any ideas

  3. #3
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    Re: DVDs mount CDs don't

    Quote Originally Posted by gleble View Post
    I tried $mount cdrom and got

    Code:
    ***@laptop:~$ mount cdrom
    mount: can't find cdrom in /etc/fstab or /etc/mtab
    Any ideas
    Maybe try...

    Code:
    mount /dev/cdrom
    You might have to have the "/dev/" part in front of the "cdrom".

    Also, could you maybe post the output of...

    Code:
    cat /etc/fstab
    and
    Code:
    sudo fdisk -l
    ... these may help with trouble-shooting your problem.

  4. #4
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    Re: DVDs mount CDs don't

    Here you go. Hope it makes sense to you.

    Code:
    *@laptop:~$ mount /dev/cdrom
    mount: block device /dev/scd0 is write-protected, mounting read-only
    mount: /dev/scd0 already mounted or /media/cdrom0 busy
    mount: according to mtab, /dev/scd0 is already mounted on /media/cdrom0
    *@laptop:~$ cat /etc/fstab
    # /etc/fstab: static file system information.
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    proc            /proc           proc    defaults        0       0
    # /dev/sda5
    UUID=856d304d-903a-4c0d-83fc-b7585c43c09e /               ext3    relatime,errors=remount-ro 0       1
    # /dev/sda6
    UUID=671d992d-5b95-4d2d-ab53-187550277aa5 none            swap    sw              0       0
    /dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec,utf8 0       0
    
    *@nlaptop:~$ sudo fdisk -l
    
    Disk /dev/sda: 160.0 GB, 160041885696 bytes
    255 heads, 63 sectors/track, 19457 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x93fec8ad
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1               1        1275    10240000   27  Unknown
    /dev/sda2            1343       10320    72115785   83  Linux
    /dev/sda4           10760       19457    69866685    5  Extended
    /dev/sda5           10760       19097    66974953+  83  Linux
    /dev/sda6           19098       19457     2891668+  82  Linux swap / Solaris

  5. #5
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    Re: DVDs mount CDs don't

    Sorry on the last post I had a DVD in the drive.
    Now with a CD in mount /dev/cdrom0 works after mssing about for a bit. Thanks

  6. #6
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    Re: DVDs mount CDs don't

    One more point. What does the ISO reference mean in this line from fstab
    Code:
    /dev/scd0       /media/cdrom0   auto,iso9660 user,noauto,exec,utf8 0       0

  7. #7
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    Re: DVDs mount CDs don't

    Quote Originally Posted by gleble View Post
    One more point. What does the ISO reference mean in this line from fstab
    Code:
    /dev/scd0       /media/cdrom0   auto,iso9660 user,noauto,exec,utf8 0       0
    According to Ubuntu Community fstab page, it seems that iso9660 is the file-system type used (generally) for CD/DVD media.

    I'm not sure why the CDs do not mount automatically. Hopefully someone else can help.

    For reference:
    https://help.ubuntu.com/community/Mount
    https://help.ubuntu.com/community/Fstab
    http://manpages.ubuntu.com/manpages/...8/mount.8.html
    https://help.ubuntu.com/community/Mount/USB

  8. #8
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    Re: DVDs mount CDs don't

    How are you unmounting the dvds? You might not be fully unmounting dvds before trying to mount the cds. Put in a cd and reboot. What happens?

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