What is the .sfv file for, and why are files split into small-sized .rar files?
On very rare occasions, BitTorrent clients fail when doing hash checks (verifying the data that is downloaded is in one piece and free of errors). This is where the .sfv file included with the torrent comes in handy. You will need a program called QuickSFV installed on your system. If you get errors whilst trying to extract downloaded files, double-click the .sfv file and it will check the downloaded files for errors. If QuickSFV reports filename.r23 (for example) as being corrupt, then simply delete the current filename.r23 and resume the torrent (assuming the files are still in your torrent download folder). The deleted filename.r23 will then be re-downloaded on it’s own. This is the reason why small .rar archives are used by the uploaders. For example, if a hash check fails on a torrent that contains a DVD ISO image split into small .rar files, you will only need to re-download a 50MB file. If the DVD ISO wasn’t split into small .rar files and a hash-check failed, you would need to
