I am on a supercomputer research team at a small university. We can't seem to find where the CUDA roll is installed on our Rocks cluster, and we're pretty sure it was never properly installed. We do have the iso of the roll. In searching on how to reinstall a roll, the only method of installing a single new roll that my colleagues is to create a restore roll and reinstall the frontend with the restore roll and any new rolls. Is there some better way that we're missing? The cluster we have cannot be taken down for an extended period, as a class needs it for ongoing assignments.