Patents Assigned to Seagate Technologies LLC
  • Zero skew with ultrasonic piezoelectric swing suspension
    Patent number: 11468909
    Abstract: A data storage device includes a base, a data storage disk, an actuator arm, a suspension, and a piezoelectric actuator. The data storage disk is attached to the base and has a read/write surface defining an x-y plane. The actuator arm is attached to the base at a first pivot point to rotate parallel to the x-y plane. The suspension is attached to the actuator arm at a second pivot point, the suspension having a first end comprising a curved edge surface, and a second end supporting a head that is configured to interact with the read/write surface. The piezoelectric actuator is disposed on the actuator arm and comprises a biasing finger configured to contact the curved edge surface to rotate the suspension parallel to the x-y plane about the second pivot point. An actuator arm assembly and a method of use are also described.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: October 11, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Cho Kok Liang, Xiong Liu, Than Zaw Myint, Yichao Ma
  • Data storage drive pressure sensing using a head temperature sensor and a head heater
    Patent number: 11468918
    Abstract: A data storage drive includes a rotatable data storage medium, and a head communicatively couplable to the data storage medium. The head includes a temperature sensor and a heater. The data storage drive also includes a ramp for supporting the head when the head is moved away from the data storage medium, and a controller. The controller is configured to obtain first temperature sensor measurement values for different head heater power settings when the head is positioned on the ramp, and is configured to determine an internal pressure of the data storage drive as a function of the first temperature sensor measurement values.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: October 11, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Huazhou Lou, YiMin Niu, Eric John McCalla, Dipeshkumar J. Purani
  • Hot-swappable protocol expander module for storage array
    Patent number: 11467997
    Abstract: A data storage array has a backplane at the base of an enclosure. A plurality of data storage drives are coupled to connectors of the backplane. A hot-swappable protocol expander module is coupled between the drives and the backplane through a top of the enclosure or to the backplane through a side of the enclosure.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: October 11, 2022
    Assignee: Seagate Technology LLC
    Inventors: Odie Banks Killen, Jr., David Dick Anderson, John Davis Schnabel
  • METHOD FOR MAKING A THERMALLY-STABILIZED PLASMONIC ALLOY FEATURE OF A HEAT-ASSISTED MAGNETIC RECORDING HEAD NEAR-FIELD TRANSDUCER
    Publication number: 20220319543
    Abstract: A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a thermally-stabilized plasmonic alloy, wherein the thermally-stabilized plasmonic alloy comprises a plasmonic metal and at least one alloying metal.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 6, 2022
    Applicant: Seagate Technology LLC
    Inventors: Anil Kumar Puri, Venancio Calero Vila, Evangelos Atmatzakis, Aji Baby, Paula Frances McElhinney, Beverley Rutherford McConnell, Marcus Benedict Mooney, Mark Gubbins
  • HEAT-ASSISTED MAGNETIC RECORDING HEAD NEAR-FIELD TRANSDUCER WITH A THERMALLY-STABILIZED PLASMONIC ALLOY
    Publication number: 20220319542
    Abstract: A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a thermally-stabilized plasmonic alloy, wherein the thermally-stabilized plasmonic alloy comprises a plasmonic metal and at least one alloying metal.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 6, 2022
    Applicant: Seagate Technology LLC
    Inventors: Anil Kumar Puri, Venancio Calero Vila, Evangelos Atmatzakis, Aji Baby, Paula Frances McElhinney, Beverley Rutherford McConnell, Marcus Benedict Mooney, Mark Gubbins
  • Vibration-induced on-cylinder limit adjustment
    Patent number: 11462245
    Abstract: A method includes determining at least one of an areal density margin or a reliability margin for a combination of a head and a data storage surface in a data storage drive. The method also includes employing the determined at least one of the AD margin or the reliability margin to adjust an on-cylinder limit value associated with the combination of the head and the data storage surface.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: October 4, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Raye A. Sosseh, Richard P. Michel, Evgeny Rafaelovich Kharisov, Mark A. Gaertner
  • Cable management assembly
    Patent number: 11464131
    Abstract: A system includes a cable management assembly movable between an extended position and a retracted position. The cable management assembly includes a first pair of brackets slidable with respect to each other as the cable management assembly moves between the extended position and the retracted position. The cable management assembly also includes a second pair of brackets slidable with respect to each other as the cable management assembly moves between the extended position and the retracted position. One of the first pair of brackets is pivotably coupled to one of the second pair of brackets.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: October 4, 2022
    Assignee: Seagate Technology LLC
    Inventor: Michael J. Russell
  • Modular edge storage devices with high speed interconnects
    Patent number: 11464129
    Abstract: A data storage ecosystem that includes a series of devices of increasing size, designed to look and work together as a family, with at least one of the devices being a data storage device having a first consumer-accessible connector and a second high speed connector. The data storage ecosystem also includes a rack-mounted docking unit having a third high speed interfacing connector configured to couple to the second high speed connector of the data storage device when the data storage device is inserted into the rack-mounted docking unit.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: October 4, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Paul McParland, Bruno Jean Masson, Jeffrey Dale Fochtman
  • Solid state lidar silicon photonics
    Patent number: 11460545
    Abstract: A device includes a light splitter configured to receive a source light beam from a light source and split the source light beam into separate light beams, each emitted through an outlet. The device also includes resonators, each of which is optically coupled to at least one of the outlets and is configured to steer at least one of the light beams.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: October 4, 2022
    Assignee: Seagate Technology LLC
    Inventors: Aditya Jain, Zoran Jandric, Krishnan Subramanian
  • Parameter based load balancing in a distributed surveillance system
    Patent number: 11463739
    Abstract: A distributed video management system for video surveillance that allows for monitoring a camera allocation parameter and dynamic reallocation of video cameras to available camera nodes in response to detecting a change in the allocation parameter. As such, the system may provide for load balancing of the processing of video data from the video cameras with reference to the allocation parameter. The change in allocation parameter may be due to a number of potential contexts, including a change in availability of camera nodes, a change in the nature of the video data captured, a change in computational load, or other change that results in a change in allocation parameter. The allocation parameter may be continually monitored to allocate video cameras to camera nodes in the system for enhanced system performance in view of potentially changing conditions.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: October 4, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Greg D. Larrew, Margot A. LaPanse, Michael Habinsky, Michael E. Baum
  • Recessed hardmask used to form heat-assisted magnetic recording near-field transducer with heat sink
    Patent number: 11456008
    Abstract: A method involves depositing a near-field transducer on a substrate of a slider. The near-field transducer comprises a plate-like enlarged portion and a peg portion. A first hard stop extending from the near field transducer and an air bearing surface is formed. A heat sink is formed on the enlarged portion and the first hard stop. A dielectric material is deposited over the near-field transducer and the heat sink. A second hard stop is deposited on the dielectric material away from the air bearing surface. The second hard stop comprises a recess corresponding in size and location to the heat sink. The method involves milling at an oblique angle to the substrate between the first hard stop and second hard stop to cut through the heat sink at the angle. The recess of the second hard stop increases a milling rate over the heat sink compared to a second milling rate of the dielectric away from the heat sink.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: September 27, 2022
    Assignee: Seagate Technology LLC
    Inventors: Anusha Natarajarathinam, Yongjun Zhao, Hui Brickner, Dongsung Hong
  • Heat-assisted magnetic recording device incorporating laser heater for improved laser stability
    Patent number: 11456011
    Abstract: An apparatus comprises a slider configured to facilitate heat assisted magnetic recording and a submount affixed to the slider. A laser unit is affixed to the submount and comprises a laser operable in a non-lasing state and a lasing state. A heater is embedded in the laser unit or the submount. The heater is configured to generate preheat for heating the laser during the non-lasing state and to generate steering heat for heating the laser during the lasing state.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: September 27, 2022
    Assignee: Seagate Technology LLC
    Inventors: James Gary Wessel, Roger L. Hipwell, Jr.
  • Managing unexpected shutdown in a disk drive with multiple actuators and controllers
    Patent number: 11455250
    Abstract: An event that indicates unexpected shutdown of a hard disk drive is determined. The hard disk includes first and second controllers that control respective first and second independently-operable actuators. Each of the actuators has one or more heads that access one or more spinning disks of the hard disk drive. While receiving power for the hard disk drive via back-electromotive force of a motor driven by the one or more spinning disks in response to the event, the first and second controllers independently move the respective first and second actuators to safe positions. In response to determining the first and second actuators are in safe positions, write cache data associated with the first and second controllers is written to a non-volatile memory.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: September 27, 2022
    Assignee: Seagate Technology LLC
    Inventors: Bryce L. DeClercq, Steven Faulhaber, Christopher L. Hill, David P. Bremer, Steven Jerome Spaulding
  • Thermal management of laser diode mode hopping for heat assisted media recording
    Patent number: 11450346
    Abstract: A method and apparatus provide for determining a temperature at a junction of a laser diode when the laser diode is operated in a lasing state that facilitates heat-assisted magnetic recording, comparing the junction temperature and an injection current supplied during the lasing state to stored combinations of junction temperature and injection current, and determining a likelihood of mode hopping occurring for the laser diode during the lasing state based on the comparison to stored combinations of junction temperature and injection current.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: September 20, 2022
    Assignee: Seagate Technology LLC
    Inventors: Karim Tatah, Mourad Benakli, James Gary Wessel
  • Method of writing and reading data in an NVM using Lpage identification headers
    Patent number: 11449252
    Abstract: A method includes the steps of storing non-header data into a plurality of logical pages (“Lpages”) of a non-volatile memory (“NVM”), each Lpage including a number of read units, wherein at least one of the read units is a spanning read unit that spans Lpage boundaries and includes a first byte of at least one Lpage starting in the read unit, storing, in each of the at least one spanning read units that include the first byte of the at least one Lpage starting in the read unit, an Lpage identification header per each of the at least one Lpages starting in the spanning read unit, each Lpage identification header identifying a location of the first byte of the respective Lpage starting within the respective spanning read unit, and locating an Lpage of data stored in the NVM by referring to an entry stored a flash memory controller map table.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: September 20, 2022
    Assignee: Seagate Technology LLC
    Inventor: Earl T. Cohen
  • Secure erasure of a drive array using drive-defined, trusted computing group bands
    Patent number: 11449265
    Abstract: Partitions of drives are used to form a volume of a drive array. Each partition is associated with a trusted computing group (TCG) band. Each drive encrypts data stored on the partition with a key unique to the TCG band. The volume is formed using the partitions of the drives. In response to a band-based erasure being invoked on the volume, each drive of the plurality of drives overwrites the key of the TCG band associated with the partition and provides an erasure certificate attesting to the overwriting of the key. The erasure certifications from the drives are compiled into a consolidated erasure certification that attests to the erasure of the volume.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: September 20, 2022
    Assignee: Seagate Technology LLC
    Inventors: Varun Reddy Boddu, Siew Lian Tay
  • Thermal spot-dependent write method and apparatus for a heat-assisted magnetic storage device
    Patent number: 11450341
    Abstract: An apparatus comprises a write pole for writing data to a magnetic recording medium and a near-field transducer (NFT) optically coupled to a laser source and configured to produce a thermal spot on the medium. A laser driver applies laser operation power (Iop) to the laser source. A channel circuit generates symbols having a length of nT, where T is a channel clock rate and n is an integer. The laser driver applies Iop to the laser source and a write driver applies bi-directional write currents to the write pole to record the symbols at a location of the thermal spot on the medium, wherein a duration of applying Iop to the laser source by the laser driver is dependent on a length of the symbols and the effective thermal spot size.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: September 20, 2022
    Assignee: Seagate Technology LLC
    Inventors: Xiong Liu, Quan Li
  • Waveguide having plasmonic strips for heat-assisted magnetic recording
    Patent number: 11443764
    Abstract: An apparatus includes a slider configured for heat-assisted magnetic recording. The slider includes an input coupler configured to receive light excited by a light source. The slider includes a waveguide core tapering along a light propagation direction from a first cross-sectional width to a second cross-sectional width, the waveguide configured to provide a surface plasmon-enhanced near-field radiation pattern proximate an output end in response to the received light. One or more cladding layers surround the waveguide core. At least one strip of plasmonic material is disposed between the waveguide core and at least one of the one or more cladding layers.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: September 13, 2022
    Assignee: Seagate Technology LLC
    Inventors: Choon How Gan, Mark Anthony Gubbins, Beverley Rutherford McConnell, Martin Peter McCurry, Michael James Hardy, Andres David Barbosa Neira, Fadi El Hallak, Anil Kumar Puri
  • Compact mode converter having first and second straight portions for heat-assisted magnetic recording device
    Patent number: 11443765
    Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: September 13, 2022
    Assignee: Seagate Technology LLC
    Inventors: Reyad Mehfuz, Aidan Dominic Goggin, Pierre Asselin, Christopher Neil Harvey
  • Disk drive with multiple actuators on a pivot axis
    Patent number: 11443763
    Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.
    Type: Grant
    Filed: June 18, 2021
    Date of Patent: September 13, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Yichao Ma, Xiong Liu