1. A method of managing wear on a plurality of independent storage devices having respective sets of memory cells, said method comprising: monitoring access characteristics of the memory cells in the plurality of independent storage devices; receiving an instruction to access data on at least one of the memory cells; selecting an independent storage device, of the plurality of independent storage devices, to access data on at least one of the memory cells of the selected independent storage device based upon one or more predetermined selection policies and the monitored access characteristics of the memory cells in the plurality of independent storage devices; and assigning the selected independent storage device to access data on at least one of the memory cells of the selected independent storage device according to the received instruction.