The data is automatically recovered to a desired arbitrary point in an external storage without imposing a burden on the host computer. An application on a host computer instructs data recovery control processing of a disk control apparatus to set a recovery opportunity. It is possible to register arbitrary...http://www.google.com/patents/US7243256?utm_source=gb-gplus-sharePatent US7243256 - External storage and data recovery method for external storage as well as program
