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
Optical sensor and electronic apparatus
Error scanning in flash memory
Multicyclic compounds and methods of use thereof
Qualification screening system and screening method thereof, qualification screening device and device under qualification screening
Asynchronous task execution
System and method for video encoding
Refuelable battery-powered electric vehicle
  Randomly Featured Patents
Pharmaceutical compounds
Non-volatile memory and method with control data management
Real-time facial recognition and verification system
Wound cell stack design for enhanced battery performance
Plants having high plant map values
Easy-opening container ends
Lookahead buffer replacement method using ratio of clients access order offsets and buffer data block offsets
User interface for presenting a list of thumbnail items associated with media items
Micromechanical device with microfluidic lubricant channel