Data error (cyclic redundancy check)
Possible cause:
The DVD you are trying to backup may be dirty, physically damaged (scratches), or badly authored.
Possible fixes:
a) Try cleaning the disc.
b) Try using DVD Decrypter to first rip the disc to your hard-drive, and then use DVD Shrink "Open Files".
http://www.dvdshrink.info/dvd-decrypter.php
c) Try using your DVD writer to read the disc.
d) Try any combination of the above.
Some newer DVDs seem to have a new kind of copy protection (or unintentional bad authoring) that could generate this error message.
Please refer to the following thread:
http://forum.digital-digest.com/showthread.php?s=&threadid=40313