Parchive (a contraction of parity archive volume set)'s an open source software project that emerged in 2001 to develop a parity file format, as conceived by Tobias Rieper and Stefan Wehlus. These parity files use a forward error correction-style system that can be used to perform data verification, and allow recovery when data's lost or corrupted. The project's currently administered by Ryan Gallagher (binerman), Roger Harrison (kbalore), Willem Monsuwe (monsuwe), and Stefan Wehlus (wehlus).… (More on Parchive)