A method for creating a control record for use in future machine recovery of gaps in a complete series of journal data formed by a computing machine from a complete series of transactional data. Copy is formed of the series of journal data for transmission to a remote site. A plurality of data group...http://www.google.com.tw/patents/US5412801?utm_source=gb-gplus-share專利 US5412801 - Gap recovery for off-site data storage and recovery systems
