I answered a [similar question here][1] a while back.  My answer is copied below.

  [1]: http://apple.stackexchange.com/questions/39504/best-way-to-copy-all-files-ignoring-errors/99517#99517

----

I use `cp -Rfv sourcefile destinationfile` with success on a pretty regular basis.

`cp` = copy

`R` = maintains file hierarchies

`f` = if  an  existing destination file cannot be opened, remove it and try again

`v` = verbose mode, displays files transferred as it progresses

`sourcefile` = data you want to copy

`destinationfile` = directory/drive you want to copy to