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
Parallel power inverter motor drive system
User control of replacement television advertisements inserted by a smart television
Nucleotide sequence coding for variable regions of .beta. chains of human T lymphocyte receptors, corresponding peptide segments and the diagnostic and therapeutic uses
Sample analyzing device
Data processing apparatus including reconfigurable logic circuit
Pressure washer
Vibration power generator and vibration power generation device, and communication device and electronic equipment with vibration power generation device
  Randomly Featured Patents
Timing control circuit, an image display apparatus, and an evaluation method of the image display apparatus
Non-invasive method for measuring lung tissue volume and pulmonary blood flow and a probe to carry out the method
Toner recycling by counterflow
Material for contact components or battery components, and battery using the same
Generating images using multiple photon maps
3-D glasses with variable duty cycle shutter lenses
Ceramic soap dish
Novel 23-imino derivatives of 23-keto compounds
Method for editing spatially related data in an interactive text processing system
Method of gripping a tubular with a tubular gripping mechanism