Resources Contact Us Home
Disk array device

Image Number 2 for United States Patent #6145067.

A disk array apparatus includes a plurality of physical disks forming a physical disk group which is logically divided into a plurality of unit areas. The unit areas are combined into a logical disk. This device includes a control section, a logical disk reconfiguration executing section, a P-EXTENT copying means, a read means, a write means, and a double write means. The control section controls an access to the logical disk in accordance with an external request. The logical disk reconfiguration executing section reconfigures the logical disk in accordance with an external request. The P-EXTENT copying means copies data from a unit area as a reconfiguration source to a unit area as a reconfiguration destination when the logical disk is reconfigured. The read means reads out data from a unit area. The write means writes data in a unit area that is not being reconfigured. The double write means writes data in both the unit area as the reconfiguration source and the unit area as the reconfiguration destination when the data is written in the unit area that is being reconfigured.

  Recently Added Patents
Mobile electronic device
Zero-copy network and file offload for web and application servers
Moving picture decoding device and moving picture decoding method
Storage device having clock adjustment circuitry with firmware-based predictive correction
Scalable header extension
Connector with shielding device and method for manufacturing connector
  Randomly Featured Patents
Paired optically variable article with paired optical structures and ink, paint and foil incorporating the same and method
Intruder detection sensor
Camera module
System and method for displaying an instantaneous fuel economy of a vehicle
Overexposure indicator for an automatic electronic flash
Free radical initiated polymerization of polymerizable ethylenically unsaturated monomer component in the presence of hydrogen peroxide
Fuel injection nozzle
Fluid cylinder with motion buffered ram assembly
Image forming apparatus and image forming method using a controlled toner supply operation
Process for producing resin composition