Patents by Inventor Yufen Lin Davis

Yufen Lin Davis 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).

  • Controlling consistency of data storage copies
    Patent number: 7668810
    Abstract: A data storage system which copies data from source data storage volumes to target data storage volumes restricts a write operation to at least one source data storage volume (FREEZE), to prevent the updating of a source while the data of a consistency group of interdependent data is being copied. Program logic selects a source data storage volume to which the restriction applies as a verification volume; and the program logic responds to a verification request to first employ the verification volume to verify that the restriction remains in place with respect to the verification volume, and to allow a reset of the restriction (THAW).
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: February 23, 2010
    Assignee: International Business Machines Corporation
    Inventors: Yufen Lin Davis, Lisa Joan Gundy, Gail Andrea Spear, John Glenn Thompson