A light emitting diode is made by a compound semiconductor in which light emitting from an active region with a multi-quantum well structure. One or more data fields are created corresponding to the plurality of nodes for storing information related to the nodes. Further, the method includes assigning portions of the storage pool to logical unit number logical block address -groups only when the LUN LBA-groups are being written to and maintaining a mapping table to track the association of the LUN LBA-groups to the storage pool. The dimers have potentially diverse use in areas stretching form pharmaceuticals to plastics.