A system, method and program product for reclaiming storage volumes in a storage area network (SAN). A method is disclosed that includes: monitoring each of a set containers implemented by a physical host, wherein each container holds a set of storage volumes that are mapped to a storage pool via a SAN switch; determining whether unused volumes in a selected container exceed an empty capacity threshold; in response to the empty capacity threshold being exceeded, determining whether an idle time threshold for the unused volumes has been exceeded with no I/O activity; and in response to the idle time threshold being exceeded with no I/O activity, separating the unused volumes from the selected container, un-mapping the unused volumes from the physical host, and returning the unused volumes to the storage pool.