First, before going deep with MHDD, set a new pc to readonly, and externally test them quick with Hdd Tune pro. If they go though on quick all green ,fast, set those drives aside ,they should be ok.
The ones not recognized, but spinning, use Different pc controllers, until they show up in bios/ mhdd/vitoria/hdat2. Trow away the ones that click with a different pcb(no/spinup-clicks even after hit or nospin with similar pcb).Manual spinup is available in mentioned programs.