Big Copies keep failing

[Hugh Evans]

I have a 1.5 TB HD with all my music, photos and videos on.... I am  
trying  to back up the contents to another 1.5TB drive using the  
Finder (10.4.10) ... but invariably I run into file errors (a file  
cannot be read) or something and the copy process stops with a  
warning dialog box - When I acknowledge the problem - the entire copy  
process stops and I do not have a grasp on what has been and what has  
not been copied....

I would like to do a copy and if there is a file error or something  
the copy program simply skips to the next file and continues... some  
kind of feedback as to what files were skipped would be useful.

Running Disk Warrior and Disk Tools does not seem to fix problem  
files - indeed I can go to files that erred on the "big copy" and  
copy them fine - one at a time.... so something strange is going on.

So... I'm looking for a very forgiving "copy" program/utility - even  
if its from the command line...

Does anyone have suggestions....  having a copy fail many hours into  
the process is very frustrating.


Thanks for any advice

hevans