Patents Assigned to Seagate Technologies LLC
  • Calculating a heater power that compensates for laser induced writer protrusion for a heat-assisted magnetic recording device
    Patent number: 10319400
    Abstract: A method includes moving a heat-assisted magnetic recording (HAMR) slider relative to a magnetic recording medium. The slider comprises a writer, a writer heater, and a near-field transducer (NFT). For each of a plurality of different head-to media spacings a test tone is written to a track of the medium, the test tone is read and a Discrete Fourier Transform (DFT) of an amplitude of the read test tone is captured. A first DFT curve is generated at a beginning of writing the test tones. A second DFT curve is generated at a saturated state of writing the test tones. An amount of horizontal shift between the first and second DFT curves is computed. The amount of horizontal shift corresponding to writer heater power required to compensate for NFT clearance offset due to laser induced writer protrusion.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: June 11, 2019
    Assignee: Seagate Technology LLC
    Inventors: Zhen Wei, Hua Liu
  • Multi-speed data storage device with media cache for high speed writes
    Patent number: 10318173
    Abstract: Apparatus and method for managing data transfers in a data storage device with rotational media that can be rotated at different speeds. In some embodiments, a non-volatile main memory is formed on a rotatable medium accessed by a moveable data transducer. A media cache provides a non-volatile data storage area. A control circuit directs writes to the main memory as the medium is rotated at a first speed and directs reads from the main memory as the medium is rotated at a higher, second speed. Writes during the rotation of the medium at the second speed are directed to the media cache instead of to the main memory so that no data are written to the main memory at the second speed. The media cache may also be located on the medium or may be formed from solid-state semiconductor memory.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: June 11, 2019
    Assignee: Seagate Technology LLC
    Inventors: Kian Keong Ooi, Utt Heng Kan, Qiang Bi, Chi Sern Tan
  • Transducer bar translation system and method of translating a transducer bar
    Patent number: 10319396
    Abstract: A plurality of transducer bars may be concurrently translated from a first orientation to a second orientation by a translation system that has first and second plates. The first plate can have a plurality of first notches with each first notch shaped to hold a transducer bar in a horizontal orientation. The second plate can have a plurality of second notches with each second notch shaped to translate the transducer bar from the horizontal orientation to a vertical orientation.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: June 11, 2019
    Assignee: Seagate Technology LLC
    Inventors: Glenn Johnson, Kevin Mayer, Peter Gunderson
  • System, method, and computer program product for increasing spare space in memory to extend a lifetime of the memory
    Patent number: 10318181
    Abstract: Methods, systems and computer-readable storage media for increasing spare space in a storage subsystem including a flash memory, extending a lifetime of the storage subsystem to achieve a stored selected minimum lifetime based at least in part as a result of the increasing spare space, and identifying at least one aspect associated with the lifetime of the storage subsystem. The storage subsystem may include compressed data stored in the flash memory.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: June 11, 2019
    Assignee: Seagate Technology LLC
    Inventor: Radoslav Danilak
  • Data storage enclosure with acoustic baffle
    Patent number: 10319414
    Abstract: A data storage enclosure can employ an acoustic baffle for the purpose of reducing performance degradation in a data storage device, such as a rotating medium hard disk drive. A storage enclosure may house a plurality of data storage devices and at least one cooling feature. One or more acoustic baffles may be positioned between the at least one cooling feature and the plurality of data storage devices. The acoustic baffle can separate a first sound pressure region that is proximal the at least one cooling feature from a second sound pressure region that is proximal the plurality of data storage devices.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: June 11, 2019
    Assignee: Seagate Technology LLC
    Inventors: Kevin Paterra, Kevin Van Pelt, Sean Kupec
  • Overlap detection for magnetic disks
    Patent number: 10319405
    Abstract: Embodiments described herein provide an apparatus that is operable with a storage system. The storage system includes a controller operable to assign a pointer to a first track of a magnetic disk when data is written to the first track. The pointer points to the end of the data in the first track. The controller is also operable to detect a successive write to an earlier written portion of the first track, to update a location of the pointer based on the successive write to the earlier written portion of the first track, to increment a write count of the first track based on the successive write to the earlier written portion of the first track, and to rewrite a track adjacent to the first track when the write count breaches a threshold number.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: June 11, 2019
    Assignee: Seagate Technologies LLC
    Inventors: Chris R. Fulkerson, Abhay T. Kataria
  • Multitrack data stored using perpendicular and longitudinal magnetic fields
    Patent number: 10311897
    Abstract: First and second tracks of a magnetic recording medium are read simultaneously via a first reader that provides a first signal based on detecting a total perpendicular field of the first and second tracks. The first and second tracks are read simultaneously via a second reader that provides a second signal based on detecting a total longitudinal field of the first and second tracks. Data is detected from the first and second signals.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Walter R. Eppler, Mehmet Fatih Erden, Stephanie Hernandez
  • Apparatus comprising magnetically soft underlayer
    Patent number: 10311907
    Abstract: Provided herein is an apparatus, including a magnetically soft underlayer (SUL); an interlayer stack overlying the SUL, wherein the interlayer stack comprises a seed layer of an fcc material; and a perpendicular magnetic recording layer overlying the interlayer stack, wherein a thickness of the SUL in combination with a distance of the SUL from the perpendicular recording layer is sufficient to orient a total magnetic field corresponding to a magnetic transducer head at an angle of about 45°.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Thomas P. Nolan, Li Tang, Yong-Chang Feng, Zhong (Stella) Wu, Samuel D. Harkness, Hans J. Richter, Youfeng Zheng
  • Near field transducers (NFT) including oxide layer
    Patent number: 10311898
    Abstract: Devices that include a near field transducer (NFT) the NFT includes a bulk of at least one plasmonic material and at least one sacrificial metal; and a surface layer that includes an oxide of the at least one sacrificial metal.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Mark Anthony Gubbins, Peter Kevin McGeehin, Marcus Benedict Mooney, Michael James Hardy
  • Prefetch command optimization for tiered storage systems
    Patent number: 10310980
    Abstract: A system is provided. The system includes a storage controller configured to receive a prefetch command from a host interface. The storage controller includes a read cache memory that stores prefetch data in response to the prefetch command and a plurality of storage tiers coupled to the storage controller and providing the prefetch data. The plurality of storage tiers includes a fastest storage tier that stores the prefetch data if the read cache memory discards the prefetch data after storing the prefetch data.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventor: George Alexander Kalwitz
  • Methods, devices, and systems for establishing fly-height parameters for hard disk drives
    Patent number: 10311905
    Abstract: A method is disclosed for establishing a fly height parameter for a hard disc drive. The method includes receiving a set of testing data associated with the hard disc drive and subjecting the hard disc drive to a fly-height test at a first, nominal temperature to generate fly-height data. Based on the set of testing data and the fly-height data, the method includes predicting the hard disc drive's fly-height data for a fly-height test at a second temperature different from the first, nominal temperature. The method further includes establishing the fly-height parameter for the hard disc drive in response to the fly-height data and the predicted fly-height data.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: ChengYi Guo, Sheng Yuan Lin, Teck Khoon Lim, Teck Hoon Chua
  • Probabilistic aging command sorting
    Patent number: 10310873
    Abstract: Systems and methods are disclosed for probabilistic aging command sorting, including adjusting an execution order for a command based on a probability of the command reaching a time out threshold. The system may determine a probability of a command timing out using a lookup table for a base queue depth, modified by a scalar value obtained from a queue depth adjustment lookup table using the actual queue depth as an index. In this manner, an accurate probability of a command timing out for a given queue depth can be determine without significant computational overhead.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey V DeRosa, LingZhi Yang, Kenneth L Barham
  • Probabilistic aging command sorting
    Patent number: 10310923
    Abstract: Systems and methods are disclosed for probabilistic aging command sorting, including adjusting an execution order for a command based on a probability of the command reaching a time out threshold. Various example embodiments are directed to selecting a command for execution from a queue of commands awaiting execution, in which the commands have non-uniform attributes influencing their selection and a time limit within which to execute them. In some embodiments, an apparatus may comprise a circuit configured to calculate a first estimated access time to execute a selected command from a command queue, modify the first estimated access time based on a probability of the selected command reaching a time-out age threshold to determine a time out-adjusted access time, and execute the selected command in an order based on the time out-adjusted access time.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey Vincent DeRosa, Jon David Trantham, Mark Gaertner
  • Near field transducers (NFTS) including barrier layer and methods of forming
    Patent number: 10311906
    Abstract: Devices having an air bearing surfaces (ABS), the devices including a near field transducer (NFT) that includes a disc having a front edge; a peg, the peg having a front surface at the air bearing surface of the apparatus, an opposing back surface, a top surface that extends from the front surface to the back surface, two side surfaces that expend from the front surface to the back surface and a bottom surface that extends from the front surface to the back surface; and a barrier layer, the barrier layer separating at least the back surface of the peg from the disc and the barrier layer having a thickness from 10 nm to 50 nm.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Jie Gong, Dimitar Dimitrov, Steven Riemer, Michael Kautzky, Tong Zhao, Yongjun Zhao
  • Patterned plasmonic underlayer
    Patent number: 10310182
    Abstract: The embodiments disclose a stack feature of a stack configured to confine optical fields within and to a patterned plasmonic underlayer in the stack configured to guide light from a light source to regulate optical coupling.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Ganping Ju, Chubing Peng, Xiaobin Zhu, Yingguo Peng, Yukiko Kubota, Timothy J Klemmer, Jan-Ulrich Thiele, Michael A. Seigler, Werner Scholz, Kim Y. Lee, David S. Kuo, Koichi Wago
  • Slider adhesion system
    Patent number: 10304483
    Abstract: A slider adhesion system can be practiced in a data storage device with a flexure suspended from a load beam and a slider mounted to a gimbal tongue of the flexure. The slider can be aligned with an aperture of the gimbal tongue and attached to an adhesion feature of the gimbal tongue with an adhesive layer. The adhesion feature may consist of a plurality of cantilevered tabs extending into the aperture of the gimbal tongue.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 28, 2019
    Assignee: Seagate Technology LLC
    Inventors: Christopher Unger, Bradley J. Ver Meer, Ravishankar Ajjanagadde Shivarama
  • Method and apparatus for controlling the temperature of components
    Patent number: 10303191
    Abstract: A method and apparatus for the temperature control of a component within a storage system wherein the storage system includes a heat exchanger in thermal communication with the component to control the temperature of the component. One method includes: generating a flow of heat transfer fluid through the heat exchanger to transfer heat to or from the heat exchanger; receiving a set point signal indicative of the desired temperature of the component in the storage system; receiving temperature data regarding the component and the heat transfer fluid, and generating an output signal to control the flow of heat transfer fluid. The heat transfer fluid may be a gas or liquid.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: May 28, 2019
    Assignee: Seagate Technology LLC
    Inventor: David C. Haigh
  • Map recycling acceleration
    Patent number: 10303598
    Abstract: An apparatus includes a memory and a controller. The memory may be configured to store data. The controller may be configured to process a plurality of input/output requests to read/write to/from the memory. The controller generally includes a processor, a cache and a hardware assist circuit. The processor may be configured to initiate a recycle operation by generation of a start index. The cache may be configured to buffer a first level of a map and less than all of a second level of the map. The hardware assist circuit may be configured to search through the first level or any portions of the second level of the map in the cache in response to the start index, and notify the processor in response to the search detecting one or more blocks in the memory that contain valid data to be recycled.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: May 28, 2019
    Assignee: Seagate Technology LLC
    Inventors: Timothy Canepa, Leonid Baryudin, Stephen D. Hanna, Alex G. Tang
  • Devices including an overcoat layer
    Patent number: 10304482
    Abstract: Devices having an air bearing surface (ABS), the devices include a write pole; a near field transducer (NFT) including a peg and a disc, wherein the peg is at the ABS of the device; an overcoat, the overcoat including a low surface energy layer.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: May 28, 2019
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Michael Seigler, Scott Franzen, Tong Zhao, Xiaoyue Huang, Steven C. Riemer, Robert Anthony Fernandez, Douglas H. Cole
  • Methods of planarization for device fabrication with head features background
    Patent number: 10297279
    Abstract: Methods of planarizing materials, such as where surface topographies are created as part of a thin film device fabrication process are described. These methods find particular application in the creation of nano-sized devices, where surface topographical features can be effectively planarized without adversely creating other surface topographies and/or causing deleterious effects a material junctions. Methods include the step of depositing a sacrificial layer overlying at least a portion of a first material layer and at least a portion of a backfilled second material at a junction between the first and second materials. The sacrificial layer substantially retains the surface topography of the microelectronic device. Chemical-mechanical planarization is performed on a surface of the sacrificial layer but leaving a remainder portion of the thickness of the sacrificial layer.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: May 21, 2019
    Assignee: Seagate Technology LLC
    Inventors: Zhiguo Ge, Shaun E. Mckinlay, Stacey C. Wakeham