Patents by Inventor Henry Esmond Butterworth

Henry Esmond Butterworth 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).

  • Data storage system and method of storing data
    Publication number: 20020046322
    Abstract: A data storage system and method of storing data with at least two controllers (200, 300) which share a storage space (244, 344) on an array of storage devices and which support the same set of logical upstream devices. The controllers (200, 300) share the workload by dividing the shared storage space (244, 344) into stripes where the stripes are sufficiently small to divide the workload uniformly across the storage device. This is achieved in the case of two controllers (200, 300) of a log structured array by dividing the storage space into odd and even tracks, all odd tracks being designated to one controller (300) and all even tracks to the other controller (200).
    Type: Application
    Filed: October 1, 2001
    Publication date: April 18, 2002
    Applicant: International Business Machines Corporation
    Inventors: Henry Esmond Butterworth, Robert Bruce Nicholson, Douglas Turner