Hewlett-packard Development Company, L.p.

Digital Equipment Corporation

Leonard S Szubowicz

Karen Lee Noel

Michael Seward Harvey

Thomas R Benson

Andrew C Goldstein

Ronald F Brender

Kenneth W Cowan

Mark E Arsenault

John J Andruszkiewicz

James J Friedrichs

Cheryl D Stocks

Richard E Peterson

Mark W Davis

Robert A Brooks

Gary M Barton

In accordance with at least some embodiments of the invention, a system comprises a plurality of computers coupled together and to an array of redundant storage devices that is accessible to the plurality of computers. Each of the plurality of computers comprises a local memory that stores at least one bitmap. The least one bitmap logs regions of the redundant array that have been modified.

Local bitmaps for an array of redundant storage devices

A method executed in a computer system for detecting and handling an invalid use of a data structure is described. The method includes the steps of providing a data structure associated with a first computing environment. The data structure includes a field having a value stored therein identifying an inaccessible address in a second computing environment. This field is used in detecting an invalid use of the data structure in the second computing environment by a computer program attempting to access memory using said inaccessible address indicated by said value contained in the first field. Additionally a preferred data structure is described as are alternative embodiments of detecting an invalid use of a data structure.

Method and apparatus for handling and detecting an invalid use of a data

Growing community of inventors

Merrimack, NH, United States of America

Leonard S Szubowicz