Patents by Inventor Limei M. Shaw

Limei M. Shaw 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 providing multi-path I/O in non-concurrent clustering environment using SCSI-3 persistent reserve
    Patent number: 6954881
    Abstract: A method and apparatus for providing multi-path I/O in non-concurrent clustering environment is disclosed. Shared non-concurrent access to logical volumes through multiple paths is provided by using SCSI-3 persistent reserve commands. Open options of the operating system are mapped to SCSI persistent reserve commands to allow all of the multiple paths to register with the logical unit number of the shared storage system and to allow the second of the multiple paths to access the logical unit number of the shared storage system after obtaining a persistent reservation with the shared storage system.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: October 11, 2005
    Assignee: International Business Machines Corporation
    Inventors: John T. Flynn Jr., Richard H. Johnson, Limei M. Shaw