dc3dd is a patched version of GNU dd with added features for computer forensics. It was developed at the DoD Cyber Crime Center by Jesse Kornblum. The first release, corresponding to Coreutils version 6.9.91, was published on 1 Feb 2008.
source link:-http://www.forensicswiki.org/wiki/Dc3dd
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commands:-
fdisk -l
dc3dd if=input file path of=output file path and name and extension
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