STORAGE SYSTEM, COMPUTER SYSTEM, HOST COMPUTER, AND DATA DUPLICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a system for backup and recovery of data in a computer system. SOLUTION: Based on an update request of data from a host computer, an output processing part updates data stored in a first domain; and a generation processing part stores update data concerned with the update request in a second domain. A marker processing part generates a marker including information on the range in which the data is stored and information on acceptance or refusal that the data is stored in a third domain based on the generation request of marker from the host computer and stores the generated marker in the second domain. A reflection processing part acquires update data corresponding to the data storage range stored before the marker referring to the marker and reflects the acquired update data to the third domain. COPYRIGHT: (C)2007,JPO&INPIT