Nope, I mean "-resync". It's two levels "above" rescan (which only scans the blockchain without changing it) and one level above reindex (which uses already existing block files). It automatically deletes all blockchain-related files and re-downloads it completely.
First I've heard of the -resync option. Is it part of Bitcoin? Its not part of DASH as far as I can find. Do you know what coin offers this option?