[ubuntu] 12.04 cannot mount dvd

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http://ubuntuforums.org – My brother-in-law gave me a dvd that he had recorded, but when I tried to play it I got the following error message: 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 I tried dmesg | tail in a terminal window and got this: josephwwalker@Dragon-PC-VN550WG6W:~$ dmesg | tail [14648.740398] UDF-fs: error (device sr0): udf_read_tagged: read failed, block=17765 (Hardware)