1. An apparatus comprising: a storage system comprising at least first and second storage tiers each comprising a plurality of storage devices; the storage system implementing at least one configurable data mover module adapted to interact with the first and second storage tiers and comprising at least one power management configuration file; wherein the data mover module alters a manner in which data is moved between the first and second storage tiers based at least in part on a change in state of the power management configuration file; wherein the data mover module is configurable in at least first and second different modes of operation involving respective first and second different manners of moving data between the first and second storage tiers by storing respective first and second different sets of information in the power management configuration file; and wherein the first mode of operation utilizes at least one of a different data transfer bandwidth and a different number of threads than the second mode of operation.