ReadyNAS Pro Pioneer -- thought I was out of the woods -- dual disk dead recovery -- shares gone

Cloning is often helpful, but since bad sectors can't be transferred it often does result in file system corruption.  RAID redundancy can't fix it, since it can't determine what sector in the stripe is bad.  You likely would have been better off cloning the healthier disk, and booting up the NAS w/o the sickest.  But its too late to change that now.

Info on Netgear's Data Recovery Service is here:  https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service