Patents by Inventor Gen-Hwa Chiang

Gen-Hwa Chiang 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 system for identifying storage devices
    Patent number: 7734712
    Abstract: Embodiments according to the invention perform functions including discovery, classification, and profiling of storage devices, computer systems, connection elements, and other components relating to a storage area network (SAN). Changes to the SAN topology are tracked in order to show growth patterns.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: June 8, 2010
    Assignee: NetApp, Inc.
    Inventors: Richard Meyer, Glen C. Yu, Rahim Ibrahim, Gen-Hwa Chiang, Kwan Sang Yap
  • Compensating for unavailability in a storage virtualization system
    Patent number: 7617252
    Abstract: A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.
    Type: Grant
    Filed: May 29, 2006
    Date of Patent: November 10, 2009
    Assignee: NetApp, Inc.
    Inventors: Rahim Ibrahim, Tuan Nguyen, Ashish Shah, Ranjit Ghate, Chan Ng, Gen-Hwa Chiang
  • Method and apparatus for identifying storage devices
    Patent number: 7203730
    Abstract: Embodiments according to the invention perform functions including discovery, classification, and profiling of storage devices, computer systems, connection elements, and other components relating to a storage area network (SAN). Changes to the SAN topology are tracked in order to show growth patterns.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: April 10, 2007
    Assignee: Network Appliance, Inc.
    Inventors: Richard Meyer, Glenn Yu, Rahim Ibrahim, Gen-Hwa Chiang, Kwan Sang Yap
  • Detecting unavailability of primary central processing element, each backup central processing element associated with a group of virtual logic units and quiescing I/O operations of the primary central processing element in a storage virtualization system
    Patent number: 7171434
    Abstract: A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: January 30, 2007
    Assignee: Network Appliance, Inc.
    Inventors: Rahim Ibrahim, Tuan Nguyen, Ashish Shah, Ranjit Ghate, Chan Ng, Gen-Hwa Chiang
  • COMPENSATING FOR UNAVAILABILITY IN A STORAGE VIRTUALIZATION SYSTEM
    Publication number: 20060206494
    Abstract: A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.
    Type: Application
    Filed: May 29, 2006
    Publication date: September 14, 2006
    Inventors: Rahim Ibrahim, Tuan Nguyen, Ashish Shah, Ranjit Ghate, Chan Ng, Gen-Hwa Chiang
  • Compensating for unavailability in a storage virtualization system
    Publication number: 20030061220
    Abstract: A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 27, 2003
    Inventors: Rahim Ibrahim, Tuan Nguyen, Ashish Shah, Ranjit Ghate, Chan Ng, Gen-Hwa Chiang