The storage system includes a disk drive and a processor, the processor serving as a file system input/output processing unit and a block input/output processing unit. In the storage system, the block input/output processing unit provides, to the file system input/output processing unit, storage areas...http://www.google.com.au/patents/US7680983?utm_source=gb-gplus-sharePatent US7680983 - Method of restoring data by CDP utilizing file system information
