Patents by Inventor Elcana Cohen

Elcana Cohen 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 tape system
    Patent number: 6341329
    Abstract: A method and apparatus for emulating a magnetic tape storage device with a conventional, unmodified magnetic disk storage device. I/O output requests for the emulated magnetic tape storage device are intercepted to determine whether they involve a virtual tape resource that comprises a magnetic disk storage device. Tape requests to such a resource are converted into one or more conventional magnetic disk storage requests to effect an analogous operation.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: January 22, 2002
    Assignee: EMC Corporation
    Inventors: Douglas E. LeCrone, Shai Hess, Elcana Cohen
  • Virtual tape system with variable size
    Patent number: 6260110
    Abstract: A method and apparatus for emulating a magnetic tape storage device with a conventional, unmodified magnetic disk storage device. I/O output requests for the emulated magnetic tape storage device are intercepted to determine whether they involve a virtual tape resource that comprises a magnetic disk storage device. Tape requests to such a resource are converted into one or more conventional magnetic disk storage requests to effect an analogous operation. The size of the virtual tape resource can be reduced below the normal data capacity for the emulated tape storage device.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: July 10, 2001
    Assignee: EMC Corporation
    Inventors: Douglas E. LeCrone, Yeshayahu Hass, Elcana Cohen
  • Virtual tape system
    Patent number: 6070224
    Abstract: A method and apparatus for emulating a magnetic tape storage device with a conventional, unmodified magnetic disk storage device. I/O output requests for the emulated magnetic tape storage device are intercepted to determine whether they involve a virtual tape resource that comprises a magnetic disk storage device. Tape requests to such a resource are converted into one or more conventional magnetic disk storage requests to effect an analogous operation.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: May 30, 2000
    Assignee: EMC Corporation
    Inventors: Douglas E. LeCrone, Shai Hess, Elcana Cohen