How to repair downloaded files with PAR2-files and News File Grabber. Quickpar is a free utility that helps recover damaged RAR files using PAR 2 / pararchvie / parity files. Download Quick Par version 0.9.1 free. PAR files are used to check the integrity of RAR's and repair broken or missing files in the archive. PAR software - Windows, Mac OSX, Linux. QuickPar - About PAR2 QuickPar • • • • • What is the difference between the PAR 1.0 specification and the PAR 2.0 specification? PAR 1.0 has a number of limitations: • Damaged files cannot be repaired, they must be fully reconstructed instead. This means that a single-byte error in a 10MB file would require the use of one whole PAR file to reconstruct the damaged file. • All of the PAR files are of equal size and contain enough recovery data to reconstruct the largest source file. This means that if you have source files of varied sizes and the smallest one is damaged, then you still need a whole PAR file to reconstruct it. When PAR is used on UseNet, this could mean that you have to download a 10MB PAR file to reconstruct a 3MB data file. • Damaged PAR files are of no use during reconstruction. A single byte error to a PAR file renders all of the recovery data it contains useless. • When used with small numbers of source files, it is very inefficient and you need to create an excessive number of PAR files to achieve a desired level of protection. For this reason, files are normally split into many equal sized pieces and PAR files generated from those pieces.
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September 2018
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