Patents by Inventor Thomas R. Engelmann

Thomas R. Engelmann 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).

  • Partitioned log-structured file system and methods for operating the same
    Patent number: 5537588
    Abstract: Apparatus and method for operating a data processing system (10) having a data processor (12), a disk data storage subsystem (14), and a disk manager (16). The method includes the steps of (a) partitioning the disk data storage system into multiple partitions including a first partition (28) and a second partition (30); (b) managing at least the first partition as a log-structured file system (LSFS) for storing segments comprised of active data units, for example logical tracks, each having, when stored, an access activity value that exceeds a first predetermined threshold; and (c) storing, within the second partition, segments comprised of inactive data units each having an access activity value, when stored, that is less than the first predetermined threshold.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: July 16, 1996
    Assignee: International Business Machines Corporation
    Inventors: Thomas R. Engelmann, Kevin F. Smith, Aare Onton, Chia-Hon Chien