Patents by Inventor Ceri I. Davies

Ceri I. Davies 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).

  • SCSI device emulation in user space facilitating storage virtualization
    Patent number: 8073674
    Abstract: A method for storage virtualization in user space. The method includes providing a first emulation module running in the OS kernel and providing a second emulation module in the user space of the computer, which may emulate a media changer or other SCSI or other storage device. The method continues with a kernel-resident driver receiving a packet of data at a port of the computer that is linked to a data communications network (such as a SAN). The packet of data may include command data for a particular data storage device (e.g., a SCSI command for a SCSI device). The method includes operating the first emulation module to communicate with the driver and to then pass through the packet of data to the second emulation module, allowing the second emulation module to run in user space but efficiently receive data from the kernel-resident driver via the first emulation module.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: December 6, 2011
    Assignee: Oracle America, Inc.
    Inventors: Charles R. Gehr, Ceri I. Davies, Stacy Maydew
  • SCSI DEVICE EMULATION IN USER SPACE FACILITATING STORAGE VIRTUALIZATION
    Publication number: 20100076744
    Abstract: A method for storage virtualization in user space. The method includes providing a first emulation module running in the OS kernel and providing a second emulation module in the user space of the computer, which may emulate a media changer or other SCSI or other storage device. The method continues with a kernel-resident driver receiving a packet of data at a port of the computer that is linked to a data communications network (such as a SAN). The packet of data may include command data for a particular data storage device (e.g., a SCSI command for a SCSI device). The method includes operating the first emulation module to communicate with the driver and to then pass through the packet of data to the second emulation module, allowing the second emulation module to run in user space but efficiently receive data from the kernel-resident driver via the first emulation module.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 25, 2010
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: CHARLES R. GEHR, CERI I. DAVIES, STACY MAYDEW