1. A method for processing information, comprising: mapping a target multi-controller system, wherein mapping includes using an index file to store mapping information, wherein mapping information includes a list of data chunks in the target multi-controller system, a list of portions that make up each chunk in the list of data chunks, and a list of controllers, wherein each controller in the list of controllers has a corresponding data chunk; determining a target controller to send a data chunk to based on the mapping; determining if the target controller is missing any portion of the data chunk; sending the missing portions of the data chunk from a source multi-controller system to the target controller, wherein the source multi-controller system has a different number of controllers than the target multi-controller system; and updating the index file based on the sent the missing portions.