docs: function getPhysicalDiskCatalog(nodeId){
          return waterline.catalogs.findMostRecent({
              node: nodeId,
              source: 'megaraid-physical-drives'
          })
          .then(function(physicalDiskCatalog){
              if (!_.has(physicalDiskCatalog, 'data')) {
                  return Promise.reject(
                      new Error('Could not find megaraid-physical-drives catalog data.'));
              }
              return physicalDiskCatalog.data;
          });
      }