Patents Examined by Nabil Hindi
  • Patent number: 10229704
    Abstract: Devices having air bearing surfaces (ABS), the devices including 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 at least one of a portion of the peg, a portion of the disc, or a portion of both the peg and the disc include a multilayer structure including at least two layers including at least one layer of a first material and at least one layer of a second material, wherein the first material and the second material are not the same and wherein the first and the second materials independently include aluminum (Al), antimony (Sb), bismuth (Bi), boron (B), barium (Ba), calcium (Ca), cerium (Ce), chromium (Cr), cobalt (Co), copper (Cu), erbium (Er), gadolinium (Gd), gallium (Ga), germanium (Ge), gold (Au), hafnium (Hf), indium (In), iridium (Ir), iron (Fe), lanthanum (La), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), ni
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: March 12, 2019
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Tong Zhao, Justin Brons, Michael Kautzky
  • Patent number: 10186293
    Abstract: The magnetic tape device includes a magnetic tape including a magnetic layer, in which an intensity ratio of a peak intensity of a diffraction peak of a (110) plane with respect to a peak intensity of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, and a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: January 22, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Norihito Kasada, Eiki Ozawa
  • Patent number: 10176829
    Abstract: Disclosed are systems, methods, and devices for increasing the storage areal density of a storage device. In one embodiment, a method is disclosed comprising receiving host data, the host data including first data and extra bit data; generating run-length limited (RLL) data by encoding the first data with an RLL encoder; generating a symbol corresponding to at least one bit of the extra bit data; and generating superpositioned data by inserting the symbol within a contiguous section of repeating bits in the RLL-encoded first data.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: January 8, 2019
    Assignee: ALIBABA GROUP HOLDING LIMITED
    Inventor: Shu Li
  • Patent number: 10170141
    Abstract: According to one embodiment, a magnetic recording and reproducing device includes an output driver, a magnetic head, and a magnetic recording medium. The output driver outputs a recording signal corresponding to input information. The magnetic head includes a coil. A recording current includes the recording signal flows in the coil. Information corresponding to the input information is recorded in the magnetic recording medium. The input information includes first, second, and third information combinations. The first information combination includes first to fourth information. The second information combination includes fifth to eighth information. The third information combination includes ninth to twelfth information. The recording signal changes to an eleventh recording current to correspond to the eleventh information. The recording signal changes to a third recording current to correspond to the third information.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: January 1, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masayuki Takagishi, Tomoyuki Maeda, Yousuke Isowaki, Naoyuki Narita, Katsuya Sugawara
  • Patent number: 10170152
    Abstract: An example tape storage drive may include reading/writing circuitry and control circuitry. The reading/writing circuitry may be to read from and write to tape media of tape cartridges. The processing circuitry may be to, in response to a tape cartridge being loaded into the tape storage drive, validate initialization of the tape cartridge. The processing circuitry may be to, in validating initialization of the tape cartridge, determine whether a tape format portion of a cartridge memory of the tape cartridge contains tape format data and whether the tape format portion is write-locked. If the tape format portion contains tape format data and is not write-locked, then the processing circuitry may fully initialize the tape cartridge including selecting a tape format for the tape cartridge and updating the tape format data to specify the selected tape format, write-lock the tape format portion, and then deem initialization of the tape cartridge to be complete.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: January 1, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Carl R. Hoerger
  • Patent number: 10170144
    Abstract: The magnetic tape device includes a TMR head and a magnetic tape, in which the magnetic tape includes fatty acid ester in a magnetic layer, Ra measured regarding a surface of the magnetic layer is 2.0 nm or smaller, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and 7.0 nm or smaller, a difference between spacings before and after the vacuum heating is greater than 0 nm and 8.0 nm or smaller, and a ratio of an average area Sdc of a magnetic cluster of the magnetic tape in a DC demagnetization state and an average area Sac of a magnetic cluster thereof in an AC demagnetization state measured with a magnetic force microscope is 0.80 to 1.30.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: January 1, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Norihito Kasada
  • Patent number: 10170142
    Abstract: A system for compensating RI while reading servo data from a rotating storage medium is provided and includes an equalizer, a Viterbi detector, and a servo control module. The equalizer receives a digital signal including a bit sequence of the servo data read from the rotating storage medium and equalizes the digital signal via filters. Some of the filters are to phase rotate the digital signal to generate phase rotated signals. The Viterbi detector operates based on a Viterbi state machine, which includes main branches having sub-branches, where: each of the main branches is to receive the phase rotated signals respectively at corresponding ones of the sub-branches; and the Viterbi detector is to determine branch metrics for each of the sub-branches, determine a minimum branch metric for each of the main branches, and process the minimum branch metric using an add-compare-select process to determine a most likely received bit sequence.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: January 1, 2019
    Assignee: Marvell International Ltd.
    Inventors: Seyed Mehrdad Khatami, Mats Oberg
  • Patent number: 10163458
    Abstract: According to one embodiment, a magnetic disk device includes a memory, a disk including track groups each including overlapping tracks, a head including a write head, and a read head, and a controller configured to write first position data, including a first position error of the write head with respect to a first target track, to the memory and a second recording area subsequent to a first recording area to which first data is written, when writing the first data to the track groups, to read the first position data from the memory or the second recording area when adding data after writing the first data, and to control a position of the write head based on the first position data.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 25, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takeyori Hara
  • Patent number: 10157637
    Abstract: Systems and methods are disclosed for sampling signals in multi-reader magnetic recording. In certain embodiments, an apparatus may comprise a plurality of read heads configured to simultaneously read from a single track of a storage medium, a plurality of analog to digital converters (ADCs) configured to receive signal patterns from corresponding read heads, and a circuit configured to control the plurality of ADCs to sample the signal patterns according to a single clock signal generator. The output of the ADCs may be individually delayed based on a down-track offset of the read heads in order to align the samples, so that samples corresponding to the same portion of the recorded signal can be combined for bit pattern detection.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: December 18, 2018
    Assignee: Seagate Technology LLC
    Inventors: Marcus Marrow, Jason Bellorado, Zheng Wu
  • Patent number: 10157001
    Abstract: A computer-implemented method includes: detecting a read access to one or more data tracks of a target data storage module; and setting a value of one or more bits in response to detecting the read access to the one or more data tracks, each of the one or more bits being associated with one of the one or more data tracks. The value of the one or more bits is set to a value configured to prevent a copy-on-write operation being applied to the one or more data tracks to which the read access was detected. Corresponding systems and computer program products are similarly disclosed, all of which advantageously improve storage system performance by reducing I/O bandwidth via preventing unnecessary copy operations.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 18, 2018
    Assignee: International Business Machines Corporation
    Inventors: Joshua J. Crawford, Paul A. Jennas, II, Jason L. Peipelman, Matthew J. Ward
  • Patent number: 10157636
    Abstract: The magnetic tape device includes a TMR head (servo head); and a magnetic tape, in which a magnetic layer of the magnetic tape includes fatty acid ester, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, a difference between spacings before and after the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm, and ?SFD (=SFD25° C.?SFD?190° C.) in a longitudinal direction of the magnetic tape is equal to or smaller than 0.50.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: December 18, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Norihito Kasada
  • Patent number: 10152375
    Abstract: In one embodiment, a system includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read data stored as a plurality of first codeword sets on a first write section of a magnetic medium. The logic is also configured to read at least some of the data stored as one or more rewritten codeword sets on a rewrite section of the magnetic medium. A length of at least one rewritten row stored to the rewrite section of the magnetic medium is greater than: a length of another rewritten row in the same rewritten codeword set, and/or a length of at least one row in a codeword set stored to the first write section of the magnetic medium.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: December 11, 2018
    Assignee: International Business Machines Corporation
    Inventors: Roy D. Cideciyan, Simeon Furrer, Robert A. Hutchins, Keisuke Tanaka
  • Patent number: 10152256
    Abstract: A method for backing up data on a tape is provided. This method includes: copying the first data area excluding the third data area, and the second data area, to the tape as a single, contiguous fourth data area. The second data area is copied to a position corresponding to the replacement of the third data area in the contiguous fourth data area. The third data area is copied to the tape as a fifth data area separate from the fourth data area. The index information for identifying the fourth data area, and the index information for identifying the fifth data area, are stored to the tape.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: December 11, 2018
    Assignee: International Business Machines Corporation
    Inventor: Tsuyoshi Miyamura
  • Patent number: 10152995
    Abstract: The magnetic tape device includes a magnetic tape including a magnetic layer, in which an intensity ratio of a peak intensity of a diffraction peak of a (110) plane with respect to a peak intensity of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, and a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: December 11, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Norihito Kasada, Eiki Ozawa
  • Patent number: 10147445
    Abstract: One or more detectors detect data from respective one or more analog sources operable to read from a storage medium. A buffer pool is between the decoders and two or more detectors. The decoders are simultaneously operable, via the buffer pool, to independently decode the data from the one or more detectors.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: December 4, 2018
    Assignee: Seagate Technology LLC
    Inventors: Bruce Douglas Buch, Mark Allen Gaertner, Jon D. Trantham, Mehmet Fatih Erden
  • Patent number: 10147452
    Abstract: To realize efficient access in case of restoring read failure data by RMW at time of data rewriting, a recording apparatus includes a write/read unit capable of performing data writing in a second data unit, in which a plurality of first data units of a predetermined amount of data are consecutive, and data reading in the first data unit with respect to a recording medium and a control unit. In response to a rewrite instruction of data, the control unit instructs the write/read unit to generate write data in the second data unit using update data relevant to the rewrite instruction and recorded data read out from the recording medium and to write the write data at a non-recording address on the recording medium, and generates or updates replacement information for associating address at which the write data is written, as a replacement destination, with address of a replacement source.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: December 4, 2018
    Assignee: SONY CORPORATION
    Inventor: Tomotaka Kuraoka
  • Patent number: 10147455
    Abstract: A memory system, sensor circuit, and method of operating a memory system are provided. The disclosed memory system includes a first transducer configured to output a first electrical signal indicative of a first operating parameter of the memory system. The memory system is further disclosed to include a second transducer configured to output a second electrical signal indicative of a second operating parameter of the memory system where the second transducer shares a node with the first transducer. The memory system is further disclosed to include a sense amplifier that receives the first electrical signal and the second electrical signal and provide an output responsive to both the first electrical signal and the second electrical signal to a preamplifier Integrated Circuit (IC).
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: December 4, 2018
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Scott M. O'Brien, Michael Straub
  • Patent number: 10141018
    Abstract: Methods and apparatus for recording and retrieval of optically readable data employ a recording medium (100) which comprises an optically active material (108) able to induce a change in properties of the medium in the presence of optical radiation having a first characteristic, such as a first optical frequency, and wherein the change in properties can be inhibited by optical radiation having a second characteristic, such as a second optical frequency. During recording, a region of the recording medium (100) is irradiated with a first beam (506) of optical radiation having the first characteristic, the beam having a sufficient intensity within a central portion of the irradiated region and being of sufficient duration to cause an optically induced change in properties of the recording medium.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: November 27, 2018
    Assignee: Shanghai Naguang Information Technology Corporation
    Inventors: Min Gu, Xiangping Li, Yaoyu Cao
  • Patent number: 10134433
    Abstract: Provided is a magnetic tape device in which a magnetic tape transportation speed is equal to or lower than 18 m/sec, Ra measured regarding a surface of a magnetic layer of a magnetic tape is equal to or smaller than 2.0 nm, a C-H derived C concentration calculated from a C-H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %, and ?SFD (=SFD25° C.?SFD?190° C.) in a longitudinal direction of the magnetic tape is equal to or smaller than 0.50, with the SFD25° C. being SFD measured in a longitudinal direction of the magnetic tape at a temperature of 25° C., and the SFD?190° C. being SFD measured at a temperature of ?190° C.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: November 20, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Norihito Kasada, Eiki Ozawa
  • Patent number: 10134427
    Abstract: Mounting a data storage medium having information recorded thereon, where: the information is formatted according to a self-describing format standard that includes first write and first read functions, the information includes first and second datasets, the first dataset includes a first file mark, an index, and an empty space between the second dataset and a combination of the first file mark and the index; receiving, from a first application, a data block and a corresponding write command for writing the data block onto the data storage medium; and in response to receiving the write command: determining that the empty space is present in the first dataset, writing, by a second write function, the data block into the empty space, and writing a second file mark in the second dataset; wherein the empty space of the data storage medium is inaccessible to the first write function of the self-describing format standard.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: November 20, 2018
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Atsushi Abe