Cannot import existing pool

Managed to destroy my boot disk (USB) on my HP Proliant system. Finally managed to install a new freenas v11.3. But when I go to import existing pool the only item listed is ‘freenas-boot | 2005844841729683936’ which seems odd (and if I try that it says pool already exists). Am I missing something? I did remove the original drives but 99% sure I reinserted in same slots (would that matter anyway). The drives do get listed if I try camcontrol devlist in Shell. They also get listed under drives. But no pool name to import??? Do not want to destroy them; can anyone offer advice?