Patents by Inventor Herman T. Todd

Herman T. Todd 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 data fill in failing read channel in parallel transfer drives
    Patent number: 5253125
    Abstract: In a multiple platter parallel transfer disk drive tolerant of a fault on one channel, data bytes and accompanying parity data are stored to different platters, corresponding with the different channels, of the parallel transfer disk drive. Failure of a channel results in substitution of a predetermined data stream in the channel for the lost data. Data stream substitution is initiated whenever the clock for the channel is not detected within a certain maximum period. Data regeneration is effected from parity data generated for the data prior to storage.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: October 12, 1993
    Assignee: Seagate Technology, Inc.
    Inventors: Wallace J. Erikson, Edward L. Grivna, Herman T. Todd