What is the best way to save my linux (open media vault / debian) install from failing disk?

I have tried dd, but it fails with io error midway trough. Also the target disk is like 30gb smaller than source, cuz im a dingus.

Ive tried some custom OMV regen script but my inatall seems to be too cursed.

What tool should i use?

EDIT: clonezilla saved my ass. Thanks everybody! OMV box is back up and running.

Boosts welcome

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