Patents by Inventor Brian Robert Pollock

Brian Robert Pollock 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).

  • Utilizing a combination of physical tracks and virtual tracks to store data on a data storage medium
    Patent number: 7330322
    Abstract: A data storage system and a method for storing data in a data storage system are provided. The data storage system includes a data storage medium that has at least one physical track that stores at least a portion of manufacturing process data, and virtual tracks that store user data.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: February 12, 2008
    Assignee: Seagate Technology LLC
    Inventors: Reed David Hanson, Brian Robert Pollock
  • Compensation for repeatable run-out error
    Patent number: 6751045
    Abstract: A method and apparatus for compensating for repeatable run-out errors in a disc drive is disclosed. The compensation is created by determining transfer function values for a servo loop in the drive as well as a sequence of repeatable run-out values for a portion of a disc. The repeatable run-out values are divided by respective transfer function values to produce compensation values that are inverse transformed to produce time-domain compensation values. These time-domain compensation values are injected into the servo loop to compensate for repeatable run-out errors.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: June 15, 2004
    Assignee: Seagate Technology, LLC
    Inventors: John Christopher Morris, Brian Robert Pollock, Timothy Francis Ellis
  • Higher inter-disc separations to improve disc drive actuator servo performance
    Patent number: 6650501
    Abstract: To alleviate excessive non-repeatable runout (NRRO) on heads between discs, an original multi-disc design is adapted by (a) reducing the number of discs in the stack and (b) configuring the disc drive of the adapted design with a larger nominal inter-disc separation than that of the original design. In one embodiment, the larger separation is maintained by an increased number of disc spacers between each consecutive pair of the discs in the disc stack of the modified design. The result of such a design adaptation is a disc drive with better performance characteristics than would exist by the original design.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: November 18, 2003
    Assignee: Seagate Technology LLC
    Inventors: Kent Jon Forbord, Brian Robert Pollock, Joshua Ward Christensen
  • Higher inter-disc separations to improve disc drive actuator servo performance
    Publication number: 20030007284
    Abstract: To alleviate excessive non-repeatable runout (NRRO) on heads between discs, an original multi-disc design is adapted by (a) reducing the number of discs in the stack and (b) configuring the disc drive of the adapted design with a larger nominal inter-disc separation than that of the original design. In one embodiment, the larger separation is maintained by an increased number of disc spacers between each consecutive pair of the discs in the disc stack of the modified design. The result of such a design adaptation is a disc drive with better performance characteristics than would exist by the original design.
    Type: Application
    Filed: September 28, 2001
    Publication date: January 9, 2003
    Inventors: Kent Jon Forbord, Brian Robert Pollock, Joshua Ward Christensen
  • Compensation for repeatable run-out error
    Patent number: 6069764
    Abstract: A method and apparatus for compensating for repeatable run-out errors in a disc drive is disclosed. The compensation is created by determining transfer function values for a servo loop in the drive as well as a sequence of repeatable run-out values for a portion of a disc. The repeatable run-out values are divided by respective transfer function values to produce compensation values that are inverse transformed to produce time-domain compensation values. These time-domain compensation values are injected into the servo loop to compensate for repeatable run-out errors.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: May 30, 2000
    Assignee: Seagate Technology, Inc.
    Inventors: John Christopher Morris, Brian Robert Pollock, Timothy Francis Ellis