Patents Assigned to Seagate Technologies LLC
  • Cost-benefit aware read-amplification in RAID scrubbing
    Patent number: 10990474
    Abstract: A method includes, upon a read operation for a stripe of a storage device, determining a percentage amount of potential read amplification for the read operation. A current age of the stripe in the read operation is determined as a percentage of a longest safe elapsed time between read scrub operations on a stripe of the storage device. A read scrub operation is performed on the stripe when the current age is greater than the percentage amount of potential read amplification.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: April 27, 2021
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: John Bent, Kenneth K. Claffey, Ian Davies, Peter Maddocks
  • Methods of measuring friction between a slider and ramp, and related systems
    Patent number: 10989649
    Abstract: Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: April 27, 2021
    Assignee: Seagate Technology LLC
    Inventors: Jian Chen, Xiong Liu, Wei Sung Lee, Erwin Mochtar Wijaya
  • Capacity swapping based on compression
    Patent number: 10983911
    Abstract: In one embodiment, a method is operable in an over-provisioned storage device comprising a cache region and a main storage region. The method includes compressing incoming data, generating a compression parameter for the compressed data, and storing at least a portion of the compressed data in chunks in the main storage region of the storage device. The method also includes predicting when to store other chunks of the compressed data in the cache region based on the compression parameter.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: April 20, 2021
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventor: Andrew M. Kowles
  • Data storage system with supplemental processing bus
    Patent number: 10983943
    Abstract: A data storage system can employ at least one data storage device having a supplemental processing bus that connects a first controller to a second controller with the supplemental bus being exposed to an exterior surface of a housing. The second controller may be positioned on a portable computing component connected to the supplemental bus while the portable computing component is positioned external to the housing. The computing capabilities of the portable computing component are identified with the first controller to allow a supplementation strategy to be generated with the first controller in response to connection of the portable computing component to the supplemental bus. The supplementation strategy can then be executed by assigning at least one processing task from the first controller to the second controller.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: April 20, 2021
    Assignee: Seagate Technology LLC
    Inventor: Christopher Nicholas Allo
  • Node management of pending and unstable operations
    Patent number: 10983876
    Abstract: A system including a plurality of nodes. Each node includes a pending operations list, an unstable operations list, and a hardware controller. The pending operations list can include operations that have not yet been executed on the node. The unstable operations list can include operations that have not yet been stored on non-volatile data storage. Each of the operations listed in the unstable operations list can include a listing of all other operations that must be executed prior to the operation being executed on each respective node. The hardware controller can be configured to execute at least one operation listed in the pending operations list, remove at least one executed operation from the pending operations list, and remove at least one operation from the unstable operations list.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: April 20, 2021
    Assignee: Seagate Technology LLC
    Inventor: Nikita Danilov
  • Detecting hidden encoding using optical character recognition
    Patent number: 10984274
    Abstract: Apparatus and method for detecting hidden encoding of text strings, such as Internet web-domain addresses or email addresses, using optical character recognition (OCR) techniques. In some embodiments, a first set of digital data having a first string of text character codes are converted into an image. Optical character recognition (OCR) is applied to the image to generate a second set of digital data having a second string of text character codes based on detection of the image. The first string of text character codes are compared to the second string of text character codes to detect the presence or absence of hidden codes in the first set of digital data. In some cases, a smoothing function such as Gaussian blurring is applied to degrade the image prior to the application of OCR.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: April 20, 2021
    Assignee: Seagate Technology LLC
    Inventor: John Luis Sosa-Trustham
  • Transfer-printed near-field transducer and heat sink
    Patent number: 10984821
    Abstract: A near-field transducer or heat sink is formed via a first process. The near-field transducer or heat sink is transfer-printed to a read/write head via a second process.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: April 20, 2021
    Assignee: Seagate Technology LLC
    Inventors: Mark Gubbins, Roger L. Hipwell, Jr., Marcus B. Mooney, Mark Ostrowski, Tong Zhao, Michael J. Hardy, Michael Christopher Kautzky, Neil Zuckerman, Declan Macken, Francis A. McGinnity
  • Centralized power loss management system for data storage devices
    Patent number: 10976795
    Abstract: A power management circuit includes at least one energy storage device and a power controller coupled to the at least one energy storage device. The power controller is configured to enable temporary power to be provided from the at least one energy storage device to a plurality of data storage devices upon a system power loss event. The power controller is further configured to receive a power loss indication signal associated with any individual one of the plurality of data storage devices and responsively enable power loss protection for the data storage device.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: April 13, 2021
    Assignee: Seagate Technology LLC
    Inventors: Deepak Nayak, Hemant Mohan, Rajesh Maruti Bhagwat
  • Data storage composite layouts for data objects
    Patent number: 10977131
    Abstract: A composite layout including a plurality of ranked sub-layouts may be used to provide various functionality for data object look-up and file system activities. Each sub-layout may include mapping information linking one or more extents of a data object to one or more locations on one or more storage apparatuses. Generally, mapping information in the highest priority sub-layout including mapped extents may be used during “reads” while the highest priority sub-layout may be used for “writes.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: April 13, 2021
    Assignee: Seagate Technology LLC
    Inventors: Nikita Danilov, Nathaniel Rutman
  • Thermal rectification with phase change materials
    Patent number: 10980152
    Abstract: A data storage device includes a heat source including a memory, and an enclosure within which the heat source is installed. The data storage device also includes a heat spreader within the enclosure and surrounding the heat source. The data storage device further includes a thermal interface material within the enclosure. The thermal interface material is coupled to the heat source and to the heat spreader, thereby providing a first low thermal resistance path between the heat source and the heat spreader. A phase change material is coupled to the thermal interface material such that the thermal interface material provides a second low thermal resistance path between the heat source and the phase change material.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: April 13, 2021
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventor: Michael Morgan
  • Generating hamming weights for data
    Patent number: 10979077
    Abstract: Embodiments herein provide for a controller that is operable to soft read a data bit a plurality of times, to generate a bit set for the data bit from the soft reads, to logically operate on the bit set, and to generate a Hamming weight for the data bit based on the logical operation. The Hamming weight has fewer bits than the bit set and is operable to correct the data bit.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: April 13, 2021
    Assignee: Seagate Technology LLC
    Inventors: Nicholas Odin Lien, Jay Allen Sheldon, Ryan James Goss, Ara Patapoutian
  • Reducing forward mapping table size using hashing
    Patent number: 10977189
    Abstract: Technologies are described herein for or reducing the size of the forward mapping table in an SSD or other storage device using hashing. A physical address of a storage location within a storage media is determined for the storage of data associated with a logical block address. The data is written to the storage location and a hash value is computed from a representation of the physical address using a hash function, where the size of the hash value is smaller than the representation of the physical address and the hash value points to a plurality of separate storage locations in the storage media. The hash value is stored in the forward mapping table associated with logical block address as opposed to the representation of the physical address.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: April 13, 2021
    Assignee: Seagate Technology LLC
    Inventors: Kristofer Carlson Conklin, Ryan James Goss, Reid Alan Welch
  • Methods of forming near field transducers and near field transducers formed thereby
    Patent number: 10971180
    Abstract: A method of forming a near field transducer (NFT), the method including the steps of depositing a primary material; and implanting a secondary element, wherein both the primary material and the secondary element are chosen such that the primary material is densified via implantation of the secondary element.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 6, 2021
    Assignee: Seagate Technology LLC
    Inventors: Sethuraman Jayashankar, Sarbeswar Sahoo
  • Compact mode converter having first and second straight portions for a heat-assisted magnetic recording device
    Patent number: 10971179
    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: June 6, 2019
    Date of Patent: April 6, 2021
    Assignee: Seagate Technology LLC
    Inventors: Reyad Mehfuz, Aidan Dominic Goggin, Pierre Asselin, Christopher Neil Harvey
  • Adaptive fault prediction analysis of computing components
    Patent number: 10970146
    Abstract: Systems and methods for adaptive fault prediction analysis are described. In one embodiment, the system includes one or more computing components, and one or more hardware controllers. In some embodiments, the storage system includes a storage drive. At least one of the one or more hardware controllers is configured to analyze one or more tolerance limits of a first computing component among the plurality of computing components; calculate a failure metric of the first computing component based at least in part on the analysis of the one or more tolerance limits of the first computing component; analyze sensor data from the first computing component in real time; and update the failure metric based at least in part on the analyzing of the sensor data.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: April 6, 2021
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Deepak Nayak, Hemant Mohan
  • Particle collector
    Patent number: 10969308
    Abstract: Aspects of the disclosure are directed to apparatuses and methods involving particulate sampling. As may be consistent with one or more embodiments, an apparatus includes a flow direction structure, a flow sampler and a particle collector having a collecting surface. The flow direction structure has interior sidewalls that direct the flow of particulate-laden gas along a flow path. The flow sampler is located in the flow path within the interior sidewalls, and operates with the flow direction structure to sample a portion of the particulate-laden gas at a reduced velocity, while allowing another portion of the particulate-laden gas to exhaust around the flow sampler. The flow sampler operates with the particle collector to direct the sampled portion of the particulate-laden gas to the collecting surface, and to adhere particulates from the particulate-laden gas to the collecting surface.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: April 6, 2021
    Assignee: Seagate Technology LLC
    Inventors: Dennis Q. Cruz, Richard Nguyen, Jonathan P. Jones, Sumit Chandra
  • Carbon overcoat surface treatment
    Patent number: 10968518
    Abstract: Systems and methods for treating a carbon overcoat surface are described. In one embodiment, the method may include depositing a magnetic recording layer over a substrate, depositing a carbon overcoat layer over the magnetic recording layer, and exposing a carbon overcoat layer to water in gas phase after the carbon overcoat layer is deposited on the magnetic recording layer. In some cases, the method may include depositing a lubricant over the outer surface of the carbon overcoat after exposing the carbon overcoat layer to the water in gas phase.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: April 6, 2021
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventor: Paul M. Jones
  • Heat-assisted magnetic recording device with multiple writers that write to the same disk surface at different time periods
    Patent number: 10971177
    Abstract: A first heat-assisted magnetic recording (HAMR) writer writes to a surface of a magnetic disk using during an initial time period. A second HAMR writer is configured to write to the surface but not during the initial time period. The initial time period extends from a first time when the disk drive is first used to a second time when a near-field transducer of the first HAMR writer reaches a first wear threshold. During a subsequent time period after the initial time period, to the surface of the disk is written to using the second HAMR writer and not the first HAMR writer.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: April 6, 2021
    Assignee: Seagate Technology LLC
    Inventors: James E. Angelo, Mehmet Fatih Erden, John W. Dykes
  • Cavity seal and moisture control
    Patent number: 10971195
    Abstract: Aspects of the disclosure are directed to apparatuses and methods involving a desiccant chamber and related componentry, as may be utilized for controlling humidity in electrical enclosures. As may be consistent with one or more embodiments, an environmental control module (ECM) includes a desiccant chamber with a desiccant material therein, first and second membranes in a pathway extending from the desiccant chamber and through respective openings in the ECM, and a gasket and enclosure on the ECM which seal the pathway. A seal in the pathway seals the opening in ECM leading to the first membrane and desiccant chamber during evacuation and fill of an electrical enclosure in which the ECM may be employed, and can be broken to couple the desiccant to the electrical enclosure.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: April 6, 2021
    Assignee: Seagate Technology LLC
    Inventors: Maxwell R. Kraus, Paul A. Beatty
  • Oxidizing or reducing atmosphere for heat-assisted magnetic recording
    Patent number: 10964354
    Abstract: A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: March 30, 2021
    Assignee: Seagate Technology LLC
    Inventors: Robert D. Turner, Yuhang Cheng, Peter W. Kanas, Martin Liam McGarry, Peter Kevin McGeenhin, Kevin R. Heim, Edward Charles Gage, Shaikh Mubassar Ali, Huazhou Lou