Does this surely mean that my data in the disk(a dvd) is corrupted. Is there any way to..say..read from one end to the error region and traverse from the opposite direction....and then combine the results..?Code:dd: reading `/dev/sr0': Input/output error 1396096+0 records in 1396096+0 records out 714801152 bytes (715 MB) copied, 471.936 s, 1.5 MB/s