I have a DVD which I can open in Windows, but in my Ubuntu 12.04 installation I cannot any more. I receive this error:
Unable to mount UDF Volume
Error mounting: mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
What should I do to open it? Do I need to install anything?
Open the terminal and try mounting the DVD with:
sudo mount -t udf /dev/sr0 /cdrom
The argument following the -t is used to indicate the filesystem type, which in this case is udf. UDF or Universal Disk Format is an operating-system-independent file system commonly used on DVD and other digital media.1
Not all DVDs are really udf, if the -t udf doesn't work (wrong superblock) try:
sudo mount -t iso9660 /dev/sr0 /cdrom
that is after sudo mkdir /cdrom so the /cdrom directory exists.
~$ sudo mount -t udf /dev/sr0 /cdrom
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog -
try `dmesg | tail` or so
~$ sudo mount -t iso9660 /dev/sr0 /cdrom
mount: block device /dev/sr0 is write-protected, mounting read-only
~$ ls /cdrom
autorun.inf casper EFI isolinux pics preseed ubuntu
boot dists install md5sum.txt pool README.diskdefines wubi.exe
*Yet it is a DVD+R
In my case (same case, DVDs playing in windows but not on Linux) I resolved it installing libdvdcss.
sudo apt install libdvd-pkg # libdvdcss in Archlinux
Besides libdvdcss I would check also that is installed libdvdread and libdvdnav.
These libraries seem to be needed to play encrypted DVDs (and I wasn't aware that the DVDs were encrypted, but they use Content Scramble System (CSS) keys that needed to be retrieved through the libdvdcss library).
