Patents by Inventor Seetharaman Padmanabhan

Seetharaman Padmanabhan 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).

  • Virtual host controller interface with multipath input/output
    Patent number: 6904477
    Abstract: A processor-based system (200) with a multipath I/O architecture, including a virtual host controller interface (vHCI) layer (280) between a common architecture layer (270) and a physical host controller interface layer (290), which may include convential host bus adapters (HBAs) coupled to target decives such as storage devices (240, 250) in a storage area network (SAN). Target drivers send I/O requests to a common architecture layer, which forwards them to the vHCI layer (280), which then sends them to HBAs for sending to the target devices (240, 250). A multipathing driver interface (MPXIO) layer (310) resides beneath the vHCI layer (280), and determines target device path information for the vHCI layer (280). Positioning the MPXIO layer (310) beneath the vHCI layer avoids the need for multipathing target drivers (360) above the common architecture layer.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: June 7, 2005
    Assignee: Sun Microsystems, Inc.
    Inventors: Seetharaman Padmanabhan, Chitrank Seshadri, John H. Danielson
  • Virtual host controller interface with multipath input/output
    Publication number: 20040107300
    Abstract: A processor-based system (200) with a multipath I/O architecture, including a virtual host controller interface (vHCI) layer (280) between a common architecture layer (270) and a physical host controller interface layer (290), which may include convential host bus adapters (HBAs) coupled to target decives such as storage devices (240, 250) in a storage area network (SAN). Target drivers send I/O requests to a common architecture layer, which forwards them to the vHCI layer (280), which then sends them to HBAs for sending to the target devices (240, 250). A multipathing driver interface (MPXIO) layer (310) resides beneath the vHCI layer (280), and determines target device path information for the vHCI layer (280). Positioning the MPXIO layer (310) beneath the vHCI layer avoids the need for multipathing target drivers (360) above the common architecture layer.
    Type: Application
    Filed: September 26, 2003
    Publication date: June 3, 2004
    Inventors: Seetharaman Padmanabhan, Chitrank Seshadri, John H Danielson