What up with MSDOS error when copying file from DVD to harddisk?

Continue my saga of copying files from DVDR disc to harddisk: I was pretty puzzled by the noisy DVD Drive that it failed copying a file, and gave me a strange Windows error prompt saying some MSDOS operation failed stuff. But after I rejected the harddisk, and then insert it in again, the copy operation was success again. That seems pretty creppy to me. But since there was zero problem on another quiet drive, so I can pretty much conclude that it's just the problem with the noisy drive, and not the discs themselves.