Create parity files and use them to recover lost data
Parchive parity files (or par files for short) create redundant data that can be used later in case parts of the original data is lost or corrupted. Par files allow file level recovery of data. That is, out of a group of many files, if a limited number of files are lost or corrupted, they can be recovered. These files will have the extensions of .par, .p01, .p02 etc.