Patents by Inventor Alexei Sacks

Alexei Sacks 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).

  • Publication number: 20080002277
    Abstract: An apparatus and associated method of servo writing to a storage media is provided that writes servo information at a first orientation pattern from a first storage extent of the storage media to a medial portion of the storage media, and writes servo information at a second orientation pattern different than the first orientation pattern from an opposing storage extent of the storage media to approximately the medial portion, so that the patterns at approximately the medial portion are positionally interlaced.
    Type: Application
    Filed: June 4, 2007
    Publication date: January 3, 2008
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Alexei Sacks, Haoying Sun, Thomas Zirps
  • Publication number: 20070025003
    Abstract: An apparatus comprises a data storage medium having a plurality of servo sectors and a plurality of data sectors, wherein each of the servo sectors includes a phase locked loop field and a track identification field, a controller for controlling the position of a recording head with respect to the data storage medium, and a servo demodulator for recovering timing information from both the phase locked loop field and the track identification field, and for producing a timing estimate. The method performed by the apparatus is also included.
    Type: Application
    Filed: July 27, 2005
    Publication date: February 1, 2007
    Applicant: Seagate Technology LLC
    Inventors: Mehmet Erden, Richard Keizer, Timothy Ellis, Alexei Sacks
  • Publication number: 20060132949
    Abstract: In a method for generating a confidence level of a position error signal (PES) component that is indicative of a quality of the PES component, a PES component is generated using position signal samples of a read back signal corresponding to a servo burst pattern. Next, a noise level corresponding to noise in the read back signal is extracted using the position signal samples. A confidence level is then generated based on the PES component and the noise level. A system for performing the method includes a transformation block, a position error signal (PES) component extractor, a noise extractor, and a confidence level generator. The transformation block is configured to receive position signal samples of a read back signal corresponding to a servo burst pattern taken at a sampling frequency. A transformed domain representation of the position signal samples is then generated by the transformation block based on the sampling frequency and the servo burst pattern.
    Type: Application
    Filed: December 22, 2004
    Publication date: June 22, 2006
    Applicant: Seagate Technology LLC
    Inventors: Mehmet Erden, Richard Keizer, Alexei Sacks, Timothy Ellis
  • Patent number: 7023631
    Abstract: A data storage device for retrieving data includes a controllably positionable head and a storage medium having servo information comprising a phase pattern having a first frequency and a PES pattern having a second frequency, the second frequency being different from the first frequency.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: April 4, 2006
    Assignee: Seagate Technology LLC
    Inventors: Huaan Zhang, Alexei Sacks
  • Publication number: 20040090693
    Abstract: A data storage device for retrieving data includes a controllably positionable head and a storage medium having servo information comprising a phase pattern having a first frequency and a PES pattern having a second frequency, the second frequency being different from the first frequency.
    Type: Application
    Filed: June 5, 2003
    Publication date: May 13, 2004
    Inventors: Huaan Zhang, Alexei Sacks