Patents by Inventor Prasanna Manja Ramakrishna

Prasanna Manja Ramakrishna 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).

  • High rpm hard disk drive testing
    Patent number: 10290319
    Abstract: A method for performing a flaw scan test on a hard disk drive is disclosed. The hard disk drive includes a magnetic recording medium and spindle motor associated with a predetermined rated speed. The method includes writing a test pattern to the magnetic recording medium while operating the spindle motor at a speed greater than the predetermined rated speed. The method also includes reading the test pattern at the greater speed and detecting flaws in response to reading the test pattern.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: May 14, 2019
    Assignee: Seagate Technology LLC
    Inventors: Antonia Tsoukatos, Tim Rausch, Mehmet Fatih Erden, Benjamin W Parish, Prasanna Manja Ramakrishna, Morovat Bryan Tayefeh, Sai Sian Hon, ChengYi Guo, Teck Khoon Lim, Song Wee Teo
  • Skip track flaw scan methods and systems
    Patent number: 10210899
    Abstract: A method for scanning for flaws on a magnetic recording medium is disclosed. The magnetic recording medium has a first set of nonconsecutive data tracks and a second set of nonconsecutive data tracks. The method includes writing a test pattern to only the first set of nonconsecutive data tracks of the magnetic recording medium, reading of the test pattern written to the first set of nonconsecutive data tracks, and identifying flaws within the first set of nonconsecutive data tracks and the second set of nonconsecutive data tracks based on the reading the test pattern.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: February 19, 2019
    Assignee: Seagate Technology LLC
    Inventors: Antonia Tsoukatos, Tim Rausch, Mehmet Fatih Erden, Benjamin W Parish, Prasanna Manja Ramakrishna, John D Reinhardt, Morovat Bryan Tayefeh
  • STORAGE MEDIA ASPERITY DETECTION
    Publication number: 20140085745
    Abstract: The present application discloses a transducer head comprising a read element that reads data from a storage media and an asperity sensor that detects a dimension of an asperity on a surface of the storage media using a temperature change at the asperity sensor. The asperity may be one or both of a void in the surface of the storage media and a protrusion from the surface of the storage media.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 27, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Kevin David Powers, Sandeep Bhushan, James J. Martin, Prasanna Manja Ramakrishna, Dale Thomas Riley, Vance Charles Kluver, Scott Howard Deits
  • Storage media asperity detection
    Patent number: 8681438
    Abstract: The present application discloses a transducer head comprising a read element that reads data from a storage media and an asperity sensor that detects a dimension of an asperity on a surface of the storage media using a temperature change at the asperity sensor. The asperity may be one or both of a void in the surface of the storage media and a protrusion from the surface of the storage media.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: March 25, 2014
    Assignee: Seagate Technology LLC
    Inventors: Kevin David Powers, Sandeep Bhushan, James J. Martin, Prasanna Manja Ramakrishna, Dale Thomas Riley, Vance Charles Kluver, Scott Howard Deits