Patents by Inventor Umang Kumar

Umang Kumar 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).

  • Patent number: 9335942
    Abstract: Methods and structure for masking of logical unit numbers (LUNs) within a switching device coupled with one or more storage enclosures. Each storage enclosure defines one or more logical volumes each identified by a LUN within the storage enclosures. The switching device gathers LUN definition information regarding each LUN defined by each storage enclosure coupled with the switching device. LUN access permission information may be provided by an administrative node/user defining a level of access permitted or denied for each host system for each LUN for each storage enclosure. The switching device then intercepts a REPORT LUNS command from any host directed to a storage enclosure and responds with only those LUNs to which the requesting host system has permitted access. Further, any other SCSI command intercepted at the switching device directed to a LUN to which the host system does not have access is modified to identify an invalid LUN.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: May 10, 2016
    Assignee: Avago Technologies General IP (Technologies) Pte. Ltd.
    Inventors: Umang Kumar, Nishant Kumar Yadav, Abhijit Suhas Aphale
  • Patent number: 8904119
    Abstract: Methods and structure for migrating a logical volume with a Serial Attached SCSI (SAS) expander are provided. The expander comprises a plurality of physical links with associated transceivers (PHYs). The expander further comprises a control unit operable to select a logical volume, and to initiate migration of data from the selected logical volume to a backup logical volume. Further, the expander includes a Serial SCSI Protocol (SSP) target of the expander operable to intercept commands directed to the selected logical volume responsive to the control unit initiating the migration, and an SSP initiator of the expander that is operable to generate commands directed to the backup logical volume based on the intercepted commands, and to provide the intercepted commands to the selected logical volume.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: December 2, 2014
    Inventors: Nishant Kumar Yadav, Umang Kumar, Rajendra Singh
  • Publication number: 20140122797
    Abstract: Methods and structure for migrating a logical volume with a Serial Attached SCSI (SAS) expander are provided. The expander comprises a plurality of physical links with associated transceivers (PHYs). The expander further comprises a control unit operable to select a logical volume, and to initiate migration of data from the selected logical volume to a backup logical volume. Further, the expander includes a Serial SCSI Protocol (SSP) target of the expander operable to intercept commands directed to the selected logical volume responsive to the control unit initiating the migration, and an SSP initiator of the expander that is operable to generate commands directed to the backup logical volume based on the intercepted commands, and to provide the intercepted commands to the selected logical volume.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: LSI CORPORATION
    Inventors: Nishant Kumar Yadav, Umang Kumar, Rajendra Singh
  • Publication number: 20130282978
    Abstract: Methods and structure for masking of logical unit numbers (LUNs) within a switching device coupled with one or more storage enclosures. Each storage enclosure defines one or more logical volumes each identified by a LUN within the storage enclosures. The switching device gathers LUN definition information regarding each LUN defined by each storage enclosure coupled with the switching device. LUN access permission information may be provided by an administrative node/user defining a level of access permitted or denied for each host system for each LUN for each storage enclosure. The switching device then intercepts a REPORT LUNS command from any host directed to a storage enclosure and responds with only those LUNs to which the requesting host system has permitted access. Further, any other SCSI command intercepted at the switching device directed to a LUN to which the host system does not have access is modified to identify an invalid LUN.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 24, 2013
    Applicant: LSI CORPORATION
    Inventors: Umang Kumar, Nishant Kumar Yadav, Abhijit Suhas Aphale