Patents by Inventor Peter Tolvanen

Peter Tolvanen 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).

  • Managing ownership of logical volumes
    Patent number: 8683260
    Abstract: A method is used in managing ownership of logical volumes. A path to a logical volume is determined, where upper-layer software selects the path to the logical volume. Based on the selection of the path, ownership of the logical volume is assigned. Lower-layer software assigns ownership of the logical volume based on information received from the upper-layer software.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: March 25, 2014
    Assignee: EMC Corporation
    Inventors: Qi Zhang, Qing Liu, Peter Tolvanen, Brahmadev Anand
  • Determining alternate paths in faulted systems
    Patent number: 8381027
    Abstract: A method is used in determining alternate paths in faulted systems. It is detected that a first processor has a problem accessing a target. The first processor has a first path to the target. An alternate path to the target is determined by identifying that a second processor has better access to the target than the first processor. The second processor has a second path to the target. Responsibility for I/O communication with the target is transferred from the first processor to the second processor. Responsibility for I/O communication with the target is transferred back to the first processor upon resolution of the problem.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: February 19, 2013
    Assignee: EMC Corporation
    Inventors: Qing Liu, Qi Zhang, Peter Tolvanen, T. David Evans, Hongliang Tang