ImSeriouslyDumb

I have a parity protected array. one of my disks became disabled and after the procedure to reactivate it failed to do so. I attempted to use MC to copy the files on that disk to another disk using "cp -r /mnt/disk# /mnt/disk#" during the process of this copy, there was a blackout. Would restarting the copy cause duplicates? or should i just clear the disabled disk and delete the files that were already copies and rebuild?