I would like to have Partclone added to Gentoo because it is the cloning-workhorse of the popular program Clonezilla. Website: https://partclone.org It would be particularly helpful when an extraction of parts of a cloned image is necessary.
I agree that this software would fit well into the official tree. We need a maintainer and a working ebuild. It is available in many other distributions already: https://repology.org/metapackage/partclone/versions You could test these ebuilds http://gpo.zugaina.org/sys-block/partclone for a start in the meantime.
*** This bug has been marked as a duplicate of bug 486518 ***