Resources Contact Us Home
Remote copy system

Image Number 6 for United States Patent #8131963.

Even when a host does not give a write time to write data, consistency can be kept among data stored in secondary storage systems. The present system has plural primary storage systems each having a source volume and plural secondary storage systems each having a target volume. Once data is received from a host, each of the plural storage systems creates write-data management information having sequential numbers and reference information and sends, to one of the primary storage systems, the data, sequential number and reference information. Each of the secondary storage systems records reference information corresponding to the largest sequential number among serial sequential numbers and stores, in a target volume in an order of sequential numbers, data corresponding to reference information having a value smaller than the reference information based on the smallest value reference information among reference information recorded in each of the plural secondary storage systems.

  Recently Added Patents
Method and apparatus to adjust received signal
Image output method and device, and image display
Lubricating oil compositions
Apparatus and method of preventing signal delay in display device
Model matching for trace link generation
Repeating frame battery with joining of cell tabs via welded-on male and female slip-fit connectors
Magnetoresistive shield with coupled lateral magnet bias
  Randomly Featured Patents
Whole blood method and kit for the detection of antibodies against human immunodeficiency virus (HIV) in HIV-seronegative individuals
Power MOS device with improved gate charge performance
NMDA receptor blockers in the therapy of urogenital disease
Method and apparatus for using a RAM memory block to remap ROM access requests
Scheme to prevent HFN un-synchronization for UM RLC in a high speed wireless communication system
Tire equalizer and indicator
Method and apparatus for accessing network authentication
Apparatus for measuring oil oxidation using fluorescent light reflected from oil
Functionalized polymers prepared by anionic polymerization
Process for the production of bis-[O-(1-alkylthioethylimino)-N-methylcarbamyl]N,N'-sulfides