Patents Assigned to Seagate Technology
  • Patent number: 10460755
    Abstract: Apparatus for recording data and method for making the same. In accordance with some embodiments, a recording layer is supported by a substrate. The recording layer has a granular magnetic recording layer with a first oxide content, a continuous magnetic recording layer with nominally no oxide content, and an oxide gradient layer disposed between the respective granular magnetic recording layer and the continuous magnetic recording layer. The oxide gradient layer has a second oxide content less than the first oxide content of the granular layer.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: October 29, 2019
    Assignee: Seagate Technology LLC
    Inventors: Pengcheng Li, Bin Lu, Thomas P. Nolan, Li-Lien Lee, Jai-Young Kim
  • Patent number: 10459798
    Abstract: A data storage system can have multiple parity redundancy with a plurality of data storage units arranged into logical rows and logical columns. A controller connected to the plurality of data storage units can orchestrate the logical rows storing striped data having at least one rotational parity value and each logical column storing striped data with a static parity value. The static parity value of each logical column may be computed from the at least one rotational parity value of at least one logical row as directed by the controller.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: October 29, 2019
    Assignee: Seagate Technology LLC
    Inventor: Chetan Bendakaluru Lingarajappa
  • Patent number: 10460762
    Abstract: An apparatus may comprise a circuit configured to receive first underlying data corresponding to a first signal with a first rate and receive a second signal with a second rate corresponding to second underlying data. The circuit may interpolate the first underlying data to generate a plurality of interpolated signals, determine, for the first signal, a first channel pulse response shape with the first rate, and determine an interference component signal based on the plurality of interpolated signals and the first channel pulse response shape. The circuit may then cancel interference in the second signal using the interference component signal to generate a cleaned signal.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: October 29, 2019
    Assignee: Seagate Technology LLC
    Inventors: Zheng Wu, Jason Bellorado, Marcus Marrow, Vincent Brendan Ashe
  • Patent number: 10455715
    Abstract: Carriers may be adapted, or configured, to secure one of a plurality of varying-sized devices received thereby. Regardless of the size of the device, an interface of the device may be positioned proximate an interface opening of the carrier for, for example, operable coupling to an enclosure. The carrier may include a first side rail, a second side rail, and a movable rail that moves between the first and second side rail to adapt, or configure, the carrier to secure the one of the plurality of varying-sized devices received thereby. For example, the movable rail may be linearly translatable between the first and second side rails.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: October 22, 2019
    Assignee: Seagate Technology LLC
    Inventors: Anil Koyad Choyikkunnil, Kiran Padmakumari Devapalan, Shankar Gopalakrishna, Saju Cheeran Verghese Francis
  • Patent number: 10453547
    Abstract: Systems and methods presented herein provide for monitoring block, page, and/or stripe degradation. In one embodiment, a controller is operable to scan a first block of memory to identify a failure in a portion of the first block. The controller suspends input/output (I/O) operations to the failed portion of the first block, and tests the failed portion of the first block to determine if the failure is a transient failure. Testing includes loading the portion of the first block with data, and reading the data from the loaded portion of the first block. If the failure subsides after testing, the controller is further operable to determine that the failure is a transient failure, and to resume I/O operations to the portion of the first block.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 22, 2019
    Assignee: Seagate Technologies LLC
    Inventors: Darshana H. Mehta, Antoine Khoueir, Ara Patapoutian
  • Patent number: 10453487
    Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 22, 2019
    Assignee: Seagate Technology LLC
    Inventors: Yukiko Kubota, Timothy John Klemmer, Kai Chieh Chang, Li Gao, Yinfeng Ding, Yingguo Peng, Jan-Ulrich Thiele
  • Patent number: 10446959
    Abstract: A system, apparatus, and method including a cable apparatus that is configured to be physically coupled to a printed circuit board. The cable apparatus includes a cable connector including at least one prong configured to be coupled within an aperture of the printed circuit board and an opening configured to receive an additional connector. The cable apparatus also includes a plurality of flexible cables coupled to the cable connector. Connecting portions of each of the plurality of flexible cables positioned within the opening of the receiving housing and configured to be operably coupled to the additional connector. The at least one prong does not transmit a signal into the printed circuit board and is configured to be press-fit within the aperture of the printed circuit board.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Timothy Groom, David Michael Davis
  • Patent number: 10446184
    Abstract: A sequence of symbols is generated to describe a set of write data, the symbols having a length of nT, where T is a channel clock rate and n is an integer over a predetermined range. Bi-directional write currents are applied to a write pole to record the sequence of symbols to a magnetic storage medium. The write pole has an effective footprint with a downtrack length of mT, where m is an integer. The write currents are switched between a first rail current and a second rail current for alternating symbols, the write currents further transitioning to an intermediate current value for at least one channel clock period for symbols longer than 1T. Write currents are applied to the write pole when recording symbols having a length longer than mT using the effective footprint of the write pole as an interval.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Xiong Liu, Quan Li, Ralph William Cross
  • Patent number: 10446182
    Abstract: Apparatus and method for heat assisted magnetic recording (HAMR). In some embodiments, a write element has a magnetic write coil that writes a magnetic pattern to a recording layer of a data recording surface. A light delivery mechanism imparts heat in the form of electromagnetic energy to the data recording layer during operation of the write element. A radiation detector detects radiation power emitting from the recording layer responsive to the operation of the light delivery mechanism. A control circuit determines a direct temperature of the recording layer responsive to the detected radiation power, and as necessary, adjusts a power input to the light delivery mechanism responsive to the determined temperature. The radiation detector may be an infrared photodetector with a graphene-based detection layer. The photodetector may be disposed between a write pole and a return pole of the write element.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Lihong Zhang, Xiong Liu, Samuel Swee Chuan Gan
  • Patent number: 10446185
    Abstract: Systems, devices, and method for phase slip recovery may include reading a plurality of data portions of a data block and positioning a mask over one or more data portions of the data block. The data portions following the mask may be shifted to provide a masked, reframed data block, and then the data block may be attempted to be decoded, which may be repeated until the data block is decoded.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Richard P. Michel, Michael J. Link, Anand R. Kharpate, Guofang Xu
  • Patent number: 10446180
    Abstract: According to some embodiments, a storage device includes a first actuator and a second actuator rotatable around a common axis. The storage device further includes a first electrical connector configured to communicate electrical signals to and from the first actuator, and a second electrical connector configured to communicate electrical signals to and from the second actuator and to communicate electrical signals to and from the first electrical connector. The storage device includes a hermetically-sealed body, the hermetically-sealed body including a base deck and a top cover, wherein the second electrical connector is configured to send and receive electrical signals to and from the first actuator and the second actuator through a single aperture in the hermetically-sealed body.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Maxwell Reese Kraus, Roger A. Resh, Andrew R. Motzko, Michael Allen Mewes
  • Patent number: 10445171
    Abstract: Technologies are described herein for or enhancing error recovery procedures in a storage device by utilizing on-the-fly error type detection. After a read error has occurred, a number of read retries are performed through an adaptive read channel in the storage device. The current channel parameters of the adaptive read channel are then compared to a number of predetermined channel parameter sets, each associated with an error type, to determine the most probable type of error that occurred. Finally, an error recovery sequence is selected to recover from the read error based on the determined error type.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Seung Youl Jeong, Min Gyeong Son, Eun Yeong Hong, Hyunjun Lee
  • Patent number: 10447315
    Abstract: In one embodiment, a system provides for optimizing an error rate of data through a communication channel. The system includes a data generator operable to generate a training sequence as a Markov code, and to propagate the training sequence through the communication channel. The system also includes a Soft Output Viterbi Algorithm (SOVA) detector operable to estimate data values of the training sequence after propagation through the communication channel. The system also includes an optimizer operable to compare the estimated data values to the generated training sequence, to determine an error rate based on the comparison, and to change the training sequence based on the Markov code to lower the error rate of the data through the communication channel.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 15, 2019
    Assignee: Seagate Technologies LLC
    Inventor: Raman Venkataramani
  • Patent number: 10446186
    Abstract: Apparatus for data storage in a cartridge library archival system. In some embodiments, a plurality of portable data storage cartridges are provided. Each cartridge has a sealed housing which encloses at least one head-disc interface (HDI) with a magnetic data transducer adjacent a rotatable data recording medium. An access station has control electronics configured to transfer data signals between a memory and the transducer of a selected cartridge loaded to the access station. The access station further has an external voice coil motor (VCM) configured to engage and advance the transducer of the selected cartridge across a recording surface of the medium. A transport mechanism can be used to automatically load the cartridges to the access station. Multiple cartridges can be loaded sequentially or concurrently to support various data transfer operations.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Riyan Alex Mendonsa, Jason Bryce Gadbois, Tim Rausch, Brett R. Herdendorf, Krishnan Subramanian
  • Patent number: 10437674
    Abstract: Systems and methods are disclosed for employing variable amounts of parity sectors. In certain embodiments, an apparatus may comprise a processor configured to generate a first number of parity sectors for write data to be written to a nonvolatile memory, and store the write data and a second number of parity sectors to the nonvolatile memory, the second number of parity sectors being a subset less than all of the first number of parity sectors. The processor may further select additional parity sectors from the first number of parity sectors based on error metrics for the write data, store the additional parity sectors to the nonvolatile memory, and perform error recovery on the write data based on the additional parity sectors.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: October 8, 2019
    Assignee: Seagate Technology LLC
    Inventors: Deepak Sridhara, Ara Patapoutian
  • Patent number: 10438614
    Abstract: An apparatus comprises a magnet housing dimensioned to receive a heat-assisted magnetic recording (HAMR) medium or a hard disk drive comprising at least one HAMR medium. A degausser is disposed in the magnet housing and is configured to generate at least one field sufficient to erase the HAMR medium, where the HAMR medium has a coercivity of between about 20 and 100 kOe at room temperature.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: October 8, 2019
    Assignee: Seagate Technology LLC
    Inventors: Kangkang Wang, Ganping Ju, Edward Charles Gage
  • Patent number: 10430084
    Abstract: Method and apparatus for managing data in a memory. In accordance with some embodiments, a data object is stored in a first non-volatile tier of a multi-tier memory structure. A metadata unit is generated to describe the data object, the metadata unit having a selected granularity. The metadata unit is stored in a different, second non-volatile tier of the multi-tier memory structure responsive to the selected granularity.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology LLC
    Inventors: Ryan James Goss, Mark Allen Gaertner, Michael Joseph Steiner
  • Patent number: 10430357
    Abstract: An apparatus to arbitrate data transfer between a computing host and a storage device across an interface includes a data transfer limiter configured to track an amount of data credits used by a data transfer across the interface and an amount of accrued data credits available to the interface. The apparatus further includes a data transfer arbiter configured to selectively disable the data transfer across the interface when the amount of data credits used by the data transfer across the interface exceeds a first threshold, and to selectively enable the data transfer across the interface when the amount of data credits used by the data transfer across the interface does not exceed a second threshold. The amount of accrued data credits reduces the amount of data credits used by the data transfer.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology, LLC
    Inventors: Ramdas Kachare, Timothy Canepa
  • Patent number: 10431244
    Abstract: Devices that have an air bearing surface (ABS), the device includes a near field transducer (NFT) that includes a disc configured to convert photons incident thereon into plasmons; and a peg configured to couple plasmons coupled from the disc into an adjacent magnetic storage medium, wherein the disc includes a disc material that includes gold or an alloy thereof and the peg includes a peg material, wherein the disc material is different from the peg material and wherein the peg material has a real part of the permittivity that is not greater than that of gold.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Tong Zhao, Michael C. Kautzky, Justin Brons, John C. Duda, Yuhang Cheng, Michael A. Seigler
  • Patent number: 10431246
    Abstract: A recording surface of a magnetic disk is divided into first and second zones. A first head of a first actuator arm assembly reads from and/or writes to the first zone exclusively. A second head of a second actuator arm assembly reads from and/or writes to the second zone exclusively. The first and second head are capable of simultaneously reading from and writing to the recording surface.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology LLC
    Inventors: Wenzhong Zhu, Kenneth Haapala, Jon D. Trantham