par2 files are a way to download large files off of usenet news groups . its like an older version of what bittorrents become but its all command line. on the usenet groups there are multimedia movies and things and this was used as away to download them . heres the propaganda on it and then the link is to the rpms .
ar 2.0 specification is a system of repairing incomplete or slightly damaged files. Here is a list of the features included in version 2.0:
PAR 2.0 either completely removes or significantly reduces these limitations:
--- Damaged files can be repaired. A single byte error in a 10MB file might only require the use of recovery data from a PAR file that is only 100KB in size.
--- There is no relationship between the size of the data files and the size of the PAR files. Also, the PAR files will normally be of varied sizes allowing you to pick the size you need appropriate to the amount of damaged data you need to repair.
--- Damaged PAR files will still be useable. PAR 2.0 can use the undamaged parts of a PAR file.
--- PAR files can be generated from a single source file without the need to split it. On UseNet, this removes the need to use RAR or any other file splitter. Please note however, that due to the limitations of some newsreaders (which do not permit the download of incomplete files), it is advisable to use RAR to split very large files.
--- It can handle up to 32768 files.
http://rpm.pbone.net/index.php3/stat/4/ ... 6.rpm.html