The invention provides a system and method for storing a copy of data stored in an information store. In one embodiment, a data agent reads one or more blocks containing the data from the information store. The data agent maps the one or more blocks to provide a mapping of the blocks, and transmits the...http://www.google.com.hk/patents/US8019963?utm_source=gb-gplus-share專利 US8019963 - Systems and methods for transferring data in a block-level storage operation
