Patents by Inventor Joel E. Ledain

Joel E. Ledain has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods for operating a log device
    Patent number: 6021408
    Abstract: A log device is coupled in the logical data transfer path between a storage device, which provides for the storage of file and system data within a main filesystem layout, and a computer system. The log device provides for the storage of the file and system data within a log structured filesystem layout. A control program is executed to manage the storage of file and system data in data segments in the log device filesystem and to selectively transfer the file and system data from the log device to the storage device. The control program utilizes location data provided in the file and system data to identify a destination storage location for the file and system data within the main filesystem layout.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: February 1, 2000
    Assignee: Veritas Software Corp.
    Inventors: Joel E. Ledain, John A. Colgrove, Dan Koren
  • Efficient virtualized mapping space for log device data storage system
    Patent number: 5996054
    Abstract: A log device based data storage subsystem provides for the efficient storage and retrieval of data with respect to an operating system executing on a computer system coupled to the data storage system. The data storage system includes a storage device providing for the storage of predetermined file and system data, as provided by the computer system, within a main filesystem layout established in the storage device. The data storage system also includes a log device coupled in the logical data transfer path between storage device and the computer system. The log device provides for the storage of the predetermined file and system data within a log structured filesystem layout established in the log device.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: November 30, 1999
    Assignee: Veritas Software Corp.
    Inventors: Joel E. Ledain, John A. Colgrove, Dan Koren
  • Log device layered transparently within a filesystem paradigm
    Patent number: 5832515
    Abstract: A log device based data storage subsystem provides for the efficient storage and retrieval of data with respect to an operating system executing on a computer system coupled to the data storage system. The data storage system includes a storage device providing for the storage of predetermined file and system data, as provided by the computer system, within a main filesystem layout established in the storage device. The data storage system also includes a log device coupled in the logical data transfer path between storage device and the computer system. The log device provides for the storage of the predetermined file and system data within a log structured filesystem layout established in the log device.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: November 3, 1998
    Assignee: Veritas Software
    Inventors: Joel E. Ledain, John A. Colgrove, Dan Koren