Patents by Inventor James Perchik

James Perchik 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).

  • Component replacement control for fault-tolerant data processing system
    Patent number: 5313628
    Abstract: Apparatus is described for component replacement control in a data processing system, with each component being assigned a label that includes a component identifier and a replacement generation value. The apparatus includes a plurality of tables for redundantly storing replacement generation values for each component. The tables that store the replacement generation values are then updated to indicate the incremented replacement generation value for the new component. Circuitry then increments the replacement generation value assigned to a component identity that is replaced by a new component. The circuitry modifies the new component's label to indicate the incremented replacement generation value. When the system is subsequently started, the replacement generation values in each component's label are compared with the replacement generation values in the tables and wherever a match is not found, the component is rejected.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: May 17, 1994
    Assignee: International Business Machines Corporation
    Inventors: Noah R. Mendelsohn, James Perchik, Thomas R. Hancock
  • Data processing method for file status recovery includes providing a log file of atomic transactions that may span both volatile and non volatile memory
    Patent number: 5201044
    Abstract: A data processing system includes both volatile and nonvolatile memories, user-inaccessible file control software and performs a method for recovering from a malfunction occurring during a file transaction that prevents accomplished microscopic transactions from being lost.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 6, 1993
    Assignee: International Business Machines Corporation
    Inventors: Alexander H. Frey, Jr., Richard C. Mosteller, Joel M. Gould, Noah R. Mendelsohn, James Perchik