VSC 6.1 and vSphere 5.1 - Rapid Clones wizard not listing a new datastore


I'm trying to create Rapid Clones from a template and place them on a newly created datastore separate from the ones that store ordinary machines. However, the list of existing datastores in the step named "Datastore details" contains only "old" datastores. The new datastore has been placed on a LUN that has been provisioned from the same SVM as the "old" datastores, albeit from a different aggregate (that shouldn't be a problem, I guess).
Should I need to configure anything within the VSC to make it recognize the new datastore?