Hi,
In windows environment (GUI)
GO to catalog
Under ACtion select : Duplication
Under Copies : select the copy number to dupliacte if this is the first duplicate copy select copy1.
select the other appropriate list boxes.
click on search Now.
Images as per the criteriea mentioned will appear.
Select the image you want to duplicate and right click select duplicate....On the popup window select the appropriate storage group and other option...finish..ensure that the backedup tapes are there in the library.
CLI
bpduplicate -npc new_primary_copy -backupid backup_id