1. A method for virtualizing and managing a storage virtualization system (SVS) in a storage management architecture, the SVS being connected to one or more storage systems, the one or more storage system comprising a plurality of storage media, the method comprising: upon completion of write operations to a source storage media, copying source data from the source storage media to target data in a target storage media based on a predefined copy policy in a copy mapping table; configuring tiered storage policies in a migration mapping table pertaining to the SVS; mapping the source storage media to the target storage media and a migration policy; determining if a migration policy condition is true; responsive to the migration policy condition, determining the source storage media and a migration storage media, and determining if a copy relation between source storage media and migration storage media exists using the copy mapping table.