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Also known as: PAR2 repair, par check
The verify-and-rebuild pass a client runs after downloading. The small index .par2 file is read first to check every block against its hash; if damage is found, enough recovery volumes are fetched and the missing blocks are reconstructed. Download clients perform this automatically, while standalone utilities do the same job on files already on disk. Repair succeeds only when recovery blocks match or exceed missing blocks.
Browse all terms in Binaries, Encoding & Repair, or see the full Usenet glossary.