Patents by Inventor Darrell Don Earl Long

Darrell Don Earl Long 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).

  • Method and apparatus for establishing and maintaining the status of membership sets used in mirrored read and write input/output without logging
    Patent number: 5917998
    Abstract: A method and apparatus that maintains in stable storage an identification of which copies in a mirrored disk system are currently up to date without requiring the use of a logging mechanism. The invention may include a plurality of mirrored disk drives and a processing unit for controlling the writing and reading of data units to and from mirrored disk drives, wherein the processing unit establishes and maintains cohort sets for each mirrored disk drive. The cohort set represents the status of copies of the data units stored on the mirrored disk drives and contains membership information for redundant copies of data units stored in the plurality of mirrored disk drives.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: June 29, 1999
    Assignee: International Business Machines Corporation
    Inventors: Luis Felipe Cabrera, Darrell Don Earl Long