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Wednesday, September 18, 2013

Resuming a partial extraction of large archive set (RAR etc) using 7-zip commandline

Let's say you get half way through extracting a very large (like 15gb) archive and for some reason the extraction fails.  For example, the BDSP 2013 media I downloaded had one RPC file corrupt, and the Adesk extractor failed to push through that problem.

7-zip is not only more robust, you can also "resume" a failed extraction attempt by using some switches:
-aos (skips files already there)
-y (prompts yes to every question)

The whole command looks something like this:
7z x {archive_name_and_path} -o{target dir} -aos -y

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