Abstract: The invention is directed to a system for managing storage of an object in a storage system having a plurality of different storage media divided into different partitions, which includes a storage processor for determining whether a particular storage partition has reached a predetermined capacity threshold; a data migration processor for identifying within the particular storage partition an object to be moved and for identifying a target destination partition for the particular object in response to the capacity determination, the migration processor identifying the target destination partition based on one or more selected from the group consisting of (a) media type of the particular storage partition, and (b) information identifying related objects in the target destination partition; and a transfer processor for transferring data representing the particular object to the target destination partition.