How do I compare a copy of a data cd-rw to the original cd-rw?

[Patrick B]

Does OSX have a compare file utility?

I use cd-rw's to back up data.
I would like to copy the cd-rw to the hard drive, and compare the copy to the cd-rw for errors. If there are no errors I can then erase the cd-rw and burn the copied data with new data added.

When OSX burns a cd, a verification is done, is it also verified when duplicating/ copying a file?
When OSX copies/ duplicates a cd to the hard drive I do not see any verification?

How can I compare files with OSX, I would like to avoid using toast

 

[Patrick B]

Does OSX automatically compare the files when copying from cd to the hard drive, or is it just a copy function without verification?

 

[dlloyd]

I don't know, but when it burns a CD it varifies stuff. Maybe that doesn't help...