parchive2 provides PAR 2.0 libraries and tools for creating parity files and recovering data using them. The key advance of PAR 2.0 is that you do not need to break a large file into smaller files before making parity files. See the parchive project for
Utility to test and create .sfv and test .par on Unix and Windows. Easy scripting. Also Handy in dos environment. Recursive directories handling. Tested files database.