how to get files from brken drives only

hi to all frnds,
i have got one problem due to failure of one hard drive as follows:
1:i had 3 drives having images data.i was downloading data from all 3 drives and one of 3 drives got failure so i lost all data in broken drive but 2 other drives data are safe(2 drives are safe drives).
2. i did contact with administrator and he restored the original data with for 6 days data.
3. Restored data contains data from broken drive and safe drive also.
4. my problem is to get only data that should be in broken drive but not in safe drives.
because safe drives data already got transferred.

please give me solution or any idea how to get only broken drive data from restored .
i was thinking to write shell script but i m new in this.
help will be higly appriciated.
thnx a ton

How were the files arranged on the 3 drives? For example, did you fill one drive before moving to the next (meaning that the files would be in date order and the ones from the broken drive would be a contiguous range if you sorted them by date?)
Do you have any sort of directory listing of the files you've already transfered?
Do you have a directory listing of the files on the broken drive (or the two good drives)?