Monitoring Or Testing The Progress Of Recording Patents (Class 360/31)
  • Patent number: 10891978
    Abstract: In one embodiment, a drive-implemented method includes determining, by a tape drive, that a magnetic recording tape is compatible with a first format, the tape drive having an array of transducers including an inner transducer and subarrays of the transducers positioned on opposite sides of the inner transducer, reading from or writing to the magnetic recording tape, by the tape drive, using the array of transducers in a first mode of operation corresponding to the first format, and processing data, by the tape drive, using only the transducers in the subarrays in the first mode of operation.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: January 12, 2021
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10885935
    Abstract: A drive-implemented method includes performing an operation on a storage medium using an array of 2N+1 transducers using transducers on only one side of a centerline of the array in a first mode of operation.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: January 5, 2021
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10867632
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, and a controller that overwrites a second track on a first track in a first track group, and records a maximum first positioning error in a first direction from the first track to the second track in the first track in a nonvolatile first recording area.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: December 15, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Yu Yamamoto, Makoto Asakura
  • Patent number: 10861572
    Abstract: A circuit includes: writing a plurality of data words, each of which has a plurality of data bits, into respective bit cells of a memory device; in response to determining that not all the data bits of the plurality of data words are correctly written into the respective bit cells of the memory device, grouping the plurality of data words as a plurality of data word sets; and simultaneously rewriting a subset of data bits that were not correctly written into the respective bit cells of the memory device, wherein the subset of the data bits are contained in a respective one of the plurality of data word sets.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: December 8, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yu-Der Chih, Chien-Yin Liu, Yi-Chun Shih
  • Patent number: 10839842
    Abstract: A data storage drive includes a servo loop for positioning a head over a disc. The servo loop includes a sensor, located in the head, that senses servo information located on the disc and produces a servo signal therefrom. The servo signal is combined with a reference signal to produce a raw position error signal (PES). The servo loop further also at least one phase-matching disturbance attenuation (PMDA) filter that receives the raw PES as an input and responsively outputs a vibration-cancellation signal, which, when combined with the raw PES, cancels vibration-induced disturbance from the raw PES, thereby producing a refined PES. A servo controller receives the refined PES and responsively produces a servo control signal. An actuator moves the head in response to receiving the servo control signal.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: November 17, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: WenJun Cao, Qiang Bi, Brent Jay Harmer, Kian Keong Ooi
  • Patent number: 10825500
    Abstract: A magnetoresistive memory device that stores data in the synthetic antiferromagnet (SAF) included in each spin-torque memory cell provides for more robust data storage. In normal operation, the memory cells use the free portion of the memory cell for data storage. Techniques for storing data in the reference portions of memory cells are presented, where an unbalanced SAF that includes ferromagnetic layers having different magnetic moments is used to lower the switching barrier for the SAF and allow for writing data values to the SAF using lower currents and magnetic fields than would be required for a balanced SAF.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: November 3, 2020
    Assignee: Everspin Technologies, Inc.
    Inventors: Han-Jong Chia, Sumio Ikegawa, Michael Tran, Jon Slaughter
  • Patent number: 10791684
    Abstract: The present invention relates to an intelligent gardening system, for monitoring and controlling gardening apparatuses in a gardening area, including: multiple sensors that collect environmental information of the gardening area; one or more gardening apparatuses that perform gardening work according to a control instruction; and a control center that generates the control instruction based on the environmental information; wherein the sensors, the gardening apparatuses and the control center communicate with each other to form an Internet of Things.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 6, 2020
    Assignee: POSITEC POWER TOOLS (SUZHOU) CO., LTD
    Inventors: Mingming He, Gen Sun, Yue Rao, Yong Shao, Fangshi Liu, Jun Wu, Chang Zhou
  • Patent number: 10783042
    Abstract: Disclosed are systems and methods for preserving of data saved on a data storage device. An assessment is made as to the degradation of the data storage device, during which a determination is made of the rate of degradation and the probability of failure of the data storage device. When the probability is greater than a given threshold, the damaged sectors of the data storage device are identified by scanning of the surface of the data storage device. A worth grade (i.e., the value of the saved data to the user) is determined at least for data in sectors close to the damaged sectors on the basis of an analysis of at least the meta-data of the data. A decision is made as to the possible loss of data, and a backup copy is created based on the worth grade of the data and the rate of degradation of the data storage device.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: September 22, 2020
    Assignee: AO Kaspersky Lab
    Inventor: Alexander A. Romanenko
  • Patent number: 10782339
    Abstract: Automatic test equipment with multiple components to generate highly accurate and stable analog test signals and method for operating the test system in semiconductor manufacturing process are disclosed. Output analog signals from existing test systems often fail the stability and accuracy requirement with less than 10 mV variations for testing certain electronic devices, due in part to environmental condition variations such as temperature fluctuations. Traditional compensation mechanisms for temperature variations involve time consuming and disruptive calibration procedures. Disclosed here is a system and method that provides near real-time monitoring and compensation for temperature-induced variations via a digital control mechanism that compensates for environmental variations in a time scale of less than 10 milliseconds and maintains the AC output analog signal with 10 milliVolt accuracy.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: September 22, 2020
    Assignee: Teradyne, Inc.
    Inventors: Zai-man Chen, Pei-Lai Zhang
  • Patent number: 10762916
    Abstract: A disk drive head assembly includes a spin torque oscillator (STO) situated between a main pole and a trailing shield. A head-disk interference (HDI) sensor is placed between the main pole and a read sensor shield. A trace is connected between a preamplifier and the head assembly for providing a first biasing voltage level to the spin torque oscillator (STO) and to the head-disk interference (HDI) sensor for determining resistance changes in the head-disk interference (HDI) sensor. Further, the preamplifier is configured for determining a resistance change in the head-disk interference (HDI) sensor based on a change in current through the head-disk interference (HDI) sensor. The spin torque oscillator (STO) and the head-disk interference (HDI) sensor are connected in parallel to two connectors from the two contacting pads on the preamplifier.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: September 1, 2020
    Assignee: Headway Technologies, Inc.
    Inventor: Yan Wu
  • Patent number: 10748567
    Abstract: A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of data tracks, including consecutive data tracks N?1 and N. A first write to data track N is performed using a first position error signal (PES) representing a position of the head relative to the data tracks. A track squeeze metric is generated for data track N?1 based on at least the first PES of the first write. The track squeeze metric for data track N?1 is accumulated during the first write, and the first write is aborted when the accumulated track squeeze metric for data track N?1 exceeds a first threshold.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: August 18, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Hideki Zaitsu, Niranjay Ravindran, So Ogiwara, Toshihisa Komai, Alain Chahwan, Weldon M. Hanson
  • Patent number: 10741201
    Abstract: According to one embodiment, a magnetic disk device applies a bias voltage for measurement to a high frequency assist element according to a setting instruction of the bias voltage to measure a conduction current by in a recording head, calculates the resistance value in the supply path of the bias voltage from a relationship between the measured current and the bias voltage for measurement, and changes the bias voltage applied at the time of data recording based on the calculated resistance value.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: August 11, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Gaku Koizumi, Masaya Ohtake
  • Patent number: 10741204
    Abstract: An apparatus according to one embodiment includes an array of transducers, where the array of transducers includes at least one contiguous group of transducers in a number specified in a format and at least two servo readers, where the servo readers are symmetrically positioned about the contiguous group of transducers and the servo readers are asymmetrically positioned relative to a centerline of the array of transducers.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 11, 2020
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10734020
    Abstract: An apparatus according to one embodiment includes an array of 2N+1 transducers, and a controller electrically coupled only to transducers in odd positions in the array. An apparatus according to another embodiment includes an array of 2N+1 transducers, where at least one of the transducers within the array is configured as a servo reader, a controller electrically coupled only to transducers in odd positions in the array, and a drive mechanism for passing a magnetic medium over the array.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 4, 2020
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10718827
    Abstract: Magnetic field sensors and sensing methods are provided. A magnetic sensor configured to measure a magnetic field whose magnitude oscillates between a first extrema and a second extrema. The magnetic sensor includes a plurality of magnetic field sensor elements, each configured to generate a sensor signal in response to the magnetic field impinging thereon. The plurality of sensor elements are grouped into a first group from which a first measurement signal is derived and a second group from which a second measurement signal is derived, and the first measurement signal and the second measurement signal having phase difference of 90°. The magnetic sensor further includes a sensor circuit configured to receive the first measurement signal and the second measurement signal, and apply a signal conversion algorithm thereto to generate a converted measurement signal having an increased frequency with respect to the first measurement signal and the second measurement signal.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: July 21, 2020
    Assignee: Infineon Technologies AG
    Inventors: Helmut Koeck, Simon Hainz, Dirk Hammerschmidt
  • Patent number: 10705759
    Abstract: Methods, systems, and computer programs encoded on computer storage medium, for identifying a data storage environment including a plurality of disk drives; exposing for each of the disk drives of the data storage environment, a management interface of the disk drive to create a zero-capacity device for the disk drive; identifying a management command for a particular disk drive of the plurality of disk drives; identifying a particular zero-capacity device that corresponds to the particular disk drive; providing the management command to the particular zero-capacity device; and in response to providing the management command, receiving a response from the particular disk drive, the response including a processing result that is responsive to the management command.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: July 7, 2020
    Assignee: Dell Products L.P.
    Inventors: Chandrashekar Nelogal, Raveendra Babu Madala, Abhijit Rajkumar Khande, Santosh Gore, Samir Paitod
  • Patent number: 10699742
    Abstract: A tape drive-implemented method, according to one embodiment, includes: detecting a read error, and sending one or more instructions to perform a first re-read attempt on a portion of a magnetic tape corresponding to the read error. In response to determining that the first re-read attempt was unsuccessful, a range of tension settings is selected. A range of lateral offsets is also selected. Moreover, one or more instructions are sent to apply each unique combination of a tension setting from the range of tension settings and a lateral offset from the range of lateral offsets. For each of the unique combinations applied, one or more instructions are sent to perform a second phase re-read attempt on the portion of the magnetic tape corresponding to the read error. Furthermore, a determination is made as to whether the second phase re-read attempt was performed successfully for any of the unique combinations.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 30, 2020
    Assignee: International Business Machines Corporation
    Inventors: Kevin B. Judd, Ernest S. Gale, Randy C. Inch, Eiji Ogura, Kazuhiro Tsuruta, Pamela R. Nylander-Hill, Tsuyoshi Miyamura
  • Patent number: 10692524
    Abstract: The invention relates to a tape drive, and to a method and a computer program product for operating a tape drive. The tape drive may include a transport mechanism which may include a tape head. The tape drive may be adapted to receive a magnetic tape with the transport mechanism, and to transport the magnetic tape by the transport mechanism. The tape head may be adapted to perform read-write operations on an oxide side of the magnetic tape. The tape drive may include a burnishing unit, which may include a burnishing roller and a burnish controller having an abrasive shell. The burnishing roller may be installed in the tape drive upstream of the tape head such that the abrasive shell supports the received magnetic tape on the oxide side. The burnish controller may be adapted to control the movement of the burnishing roller.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: June 23, 2020
    Assignee: International Business Machines Corporation
    Inventors: Erik Rueger, Stefan Wiedemann, Markus Schäfer, Robert Beiderbeck, Ole Asmussen
  • Patent number: 10678472
    Abstract: A method for execution by a computing device of a dispersed storage network. The method begins by determining whether frequency of access to a set of encoded data slices exceeds a frequently accessed threshold. The method continues, when the frequency of access exceeds the frequently accessed threshold, by determining an access amount indicative of a degree that the frequency of access exceeds the frequently accessed threshold. The method continues by generating a number of additional encoded data slices and storing the number of additional encoded data slices in a number of additional storage units, wherein the set of storage units and the number of additional storage units produce an expanded set of storage units. The method continues by sending a plurality of data access requests to subsets of the expanded set of storage units in a distributed manner to improve processing efficiency of the plurality of data access requests.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 9, 2020
    Assignee: PURE STORAGE, INC.
    Inventor: Andrew G. Peake
  • Patent number: 10658004
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head configured to write data to the disk and read data from the disk, and a controller configured to control the head to write a first track based on a first error rate read immediately after writing a second track adjacent in a radial direction of the disk to the first track.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: May 19, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Takayuki Kawabe
  • Patent number: 10643669
    Abstract: A magnetic recording slider test system includes a host to collect test results and initiate concurrent testing of a plurality of magnetic recording sliders. Each of a plurality of first processing units is configured to test at least one element of a respective magnetic recording slider. In one aspect, the plurality of first processing units concurrently tests at least one element of respective magnetic recording sliders. In another aspect, a plurality of first signals is analyzed at respective first processing units, with each of the first signals representing a Direct Current (DC) output from one or more elements of a magnetic recording slider. Results determined from analyzing the first signals are sent to the host. In another aspect, a plurality of second processing units is configured to analyze second signals that each represent an Alternating Current (AC) output from one or more elements of the plurality of magnetic recording sliders.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: May 5, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: David E. Call, Mike Wang
  • Patent number: 10643651
    Abstract: Stability or instability zones are determined for ambient temperatures and one or more operational parameters applied to a heat-assisted magnetic recording head. Operations within the stability or instability zones resulting in respective stable or unstable operation of a laser of the recording head. During operation of the recording head, it is determining that a current ambient temperature and currently applied values of the one or more operational parameters are at or near one of the instability zones, and a write operation of the recording head is modified in response.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: May 5, 2020
    Assignee: Seagate Technology LLC
    Inventors: Christopher J. Rea, Drew Michael Mader
  • Patent number: 10636447
    Abstract: An optical disc drive device includes a spindle motor that rotates an optical disc, an OPU, a first controller that causes the spindle motor and the OPU to read recorded data from the rotating optical disc, and an transmitter that transmits the read recorded data to a signal processing device disposed external to the optical disc drive device. The recorded data transmitted by transmitter is stored in a buffer provided in the signal processing device. The first controller decreases the rotational speed of the optical disc based on free space information indicating the free space of the buffer.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: April 28, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuuichi Kuze, Masatoshi Yajima, Shinichi Konishi, Akihiko Nishioka
  • Patent number: 10637509
    Abstract: The invention introduces a method for reducing data errors in transceiving of a flash storage interface, performed by a processing unit of a first side, comprising: continuously monitoring data frames and/or control frames from a second side; and triggering a de-emphasis adjustment when information of the data frame and/or the control frame indicates that the lowest layer of the second side detects errors from received data.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: April 28, 2020
    Assignee: SILICON MOTION, INC.
    Inventor: Fu-Jen Shih
  • Patent number: 10622010
    Abstract: According to one embodiment, curve fitting, which uses power supplied to the thermal actuator when a magnetic head is brought into contact with a magnetic disk by the thermal actuator and a quadratic or higher curve, is performed at at least five radial positions in a radial direction of the magnetic disk in a case of setting a control value of the thermal actuator, and it is determined as abnormal contact detection when a Z value of an RMS of a fitting residual from the quadratic or higher curve of each power exceeds a predetermined value.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: April 14, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Toru Watanabe
  • Patent number: 10613775
    Abstract: A recording control device reads tape quality information recorded on an RFID tag included in a recording tape cartridge, acquires drive quality information indicating quality of each of a plurality of tape drives that are loading targets of the recording tape cartridge, and prohibits reading or writing of data from or to the recording tape using the tape drive in a combination of which the quality is lower than predetermined quality among combinations of quality of the recording tape cartridge indicated by the read tape quality information and quality of each of the plurality of tape drives indicated by the acquired drive quality information.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: April 7, 2020
    Assignee: FUJIFILM CORPORATION
    Inventors: Naoaki Tokai, Hirokazu Hashimoto, Yosuke Sumiya
  • Patent number: 10592423
    Abstract: According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: March 17, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Takahiro Shinbori, Ryuta Kumagai
  • Patent number: 10573340
    Abstract: The card reader includes a peak detector that detects a peak point of a reproduced signal according to a threshold. The peak detector applies, to a first peak value to be determined, a second peak value immediately before the first peak value, a third peak value, which is the second preceding peak value with respect to the first peak value, and a next peak value. When a difference between a first intermediate value, which is a value between the third peak value and the second peak value, and a second intermediate value, which is a value between the second peak value and the first peak value, is greater than or equal to a first difference value, the peak detector ignores a first threshold, and decides the first peak value after confirming that a digital value corresponding to the next peak value has exceeded a second threshold.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: February 25, 2020
    Assignee: NIDEC SANKYO CORPORATION
    Inventors: Shigeo Nakajima, Katsuhisa Higashi
  • Patent number: 10566014
    Abstract: A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a spin torque oscillator (STO) element. The data storage device further comprises a differential amplifier comprising a first input coupled to a first end of the STO element and a second input coupled to a second end of the STO element. A bias current is applied to the STO element, and the bias current is adjusted. A resistance delta of the STO element is detected based on an output of the differential amplifier, wherein the resistance delta corresponds to a bias current level when the STO begins to oscillate.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: February 18, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventor: Joey M. Poss
  • Patent number: 10541038
    Abstract: An apparatus, system, and method are disclosed for identifying and selecting a subgroup of memory cells for use during a programming or erasing operation, in order to execute the programming or erasing operation in less time, while avoiding over and under programming errors. Memory devices disclosed herein may include a state change/programming circuit, a counting circuit, a determination circuit, an identification circuit, and/or a subgroup selection circuit, where each of these circuits are configured to perform operations related to the overall process of identifying and selecting the subgroup of memory cells for utilization during a programming operation.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: January 21, 2020
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Yu-Chung Lien, Xiang Yang, Zhenming Zhou, Deepanshu Dutta, Huai-Yuan Tseng
  • Patent number: 10533761
    Abstract: An HVAC controller may be programmed to identify one or more faults with respect to the operation of a connected HVAC system. In some cases, the HVAC controller may record a fault to a fault log and/or display an alert on the display of the HVAC controller only after a predetermined number of faults of the same fault type have been identified by the HVAC controller, sometime within a predetermined number of cycles of the HVAC system or within a predetermined amount of time.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: January 14, 2020
    Assignee: Ademco Inc.
    Inventors: Eric Barton, Cary Leen, Stan Zywicki
  • Patent number: 10529365
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head including a write head and a first and a second read head, and a controller configured to generate a correction value based on placement information on the write head and the first and the second read head, a first distance between the first read head and the second read head in a case where the first read head is placed at a first position of the disk, and a second distance between the first read head and the second read head in a case where the first read head is placed at the first position, and to correct positions of the heads based on the correction value in a case where first data written with the first read head placed at the first position is read.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: January 7, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Naoki Tagami, Takeyori Hara, Gaku Koizumi
  • Patent number: 10522183
    Abstract: There is provided a signal processing apparatus and a signal processing method capable of allowing data recorded at a high density to be robustly reproduced. A frame sync (FS) is restored by performing maximum likelihood decoding of the FS according to a time-varying trellis with a state and a state transition being limited according to a time, in maximum likelihood decoding of a reproduction signal reproduced from a disk-shaped recording medium, the FS representing a head of a frame, the FS of the frame being arranged at the head of the frame, the FS being recorded at the same positions in a track direction in two adjacent tracks.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: December 31, 2019
    Assignee: SONY CORPORATION
    Inventor: Satoru Higashino
  • Patent number: 10509572
    Abstract: A storage device includes a non-volatile storage, and a controller configured to carry out, in parallel, operations in response to a plurality of commands received from a host and queued in a command queue. When the controller detects an error in a first operation that is being carried out in response to a first command while the controller is in parallel carrying out a second operation in response to a second command, the controller continues to carry out the second operation until a predetermined condition is met while carrying out the second operation and, at that time when the predetermined condition is met, transmits an error event notification to the host.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: December 17, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Yutaka Sugimori, Takamasa Hirata, Mitsuhiko Sugiyama, Masaaki Tamura
  • Patent number: 10497394
    Abstract: A computer-implemented method for determining a damaged area of a magnetic tape loaded in a tape drive, according to one embodiment, includes: determining a first error location on a magnetic tape where a first error occurred in response to experiencing the first error. Moreover, the method includes determining one or more areas on the magnetic tape to be examined. The one or more areas are determined using a predetermined algorithm which incorporates the first error location. Independent of a read and/or write operation, relative motion is induced between a tape head and the magnetic tape such that the tape head is positioned adjacent to each of the respective one or more areas in turn. Furthermore, each of the one or more areas having a respective number of measured servo errors which exceeds a threshold value is identified as a damaged area of the magnetic tape.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: December 3, 2019
    Assignee: International Business Machines Corporation
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma
  • Patent number: 10497389
    Abstract: The magnetic tape includes a magnetic layer having ferromagnetic powder and a binder on a non-magnetic support, in which the magnetic layer includes a timing-based servo pattern, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, and an edge shape of the timing-based servo pattern specified by a magnetic force microscope observation is a shape in which a difference (l99.9?l0.1) between a value l99.9 of a cumulative frequency function of 99.9% of a position deviation width from an ideal shape in a longitudinal direction of the magnetic tape and a value l0.1 of the cumulative frequency function of 0.1% thereof is equal to or smaller than 180 nm.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: December 3, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuya Kaneko, Norihito Kasada, Eiki Ozawa
  • Patent number: 10490223
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, and a controller. The controller is configured to read first data written on the disk, measure a first read error rate of the first data, determine a difference in the first read error rate from a previously determined read error rate of the first data, determine a current read error rate for second data written on the disk based on the difference in the first read error rate from the previously determined read error rate, and determine whether a refresh process is performed on the second data based on the current error rate.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 26, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Hiroshi Isokawa
  • Patent number: 10467090
    Abstract: A memory controller according to an embodiment includes a first decoder which calculates first extrinsic value based on a decoding success rate specified using a first table showing a correspondence between first distance information indicating a square Euclidean distance between a first decode word and a first soft input value and a first decoding success rate indicating a probability of a decoding result that the first decode word is correct, and a second decoder which calculates second extrinsic value based on a decoding success rate specified using the second table showing a correspondence second distance information indicating a square Euclidean distance between a second decode word and a second soft input value and a second decoding success rate indicating a probability of a decoding result that the second decode word is correct.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: November 5, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Osamu Torii, Haruka Obata
  • Patent number: 10462687
    Abstract: A method (700) includes receiving (701) a receive signal (x[n]) comprising a periodic data signal component (r[n]) and a periodic interference signal component (s[n]); determining (702) an average value by averaging over sub-samples of the receive signal (x[n]), wherein the average value is independent of at least one sub-sample of the receive signal (x[n]) having a same phase as a particular sample ([n]) of the receive signal (x[n]); and determining (703) for the particular sample ([n]) of the receive signal (x[n]) an estimate (?[n]) of the interference signal component (s[n]) based on the average value.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: October 29, 2019
    Assignee: Intel IP Corporation
    Inventors: Yanai Mozes, Miki Genossar, Yuval Lomnitz
  • Patent number: 10460761
    Abstract: According to one embodiment, a defect registration method includes measuring, performing first extracting, and registering. The measuring is measuring, on a unit-area basis, performance of a storage area of a magnetic disk including a plurality of unit areas. The storage area includes a redundant area of a set capacity. The first extracting includes second extracting one or more unit areas in order of increasing the performance. The registering is registering the extracted unit areas of the set capacity as defect locations.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: October 29, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Kazuto Kashiwagi
  • Patent number: 10453484
    Abstract: In one embodiment, a drive-implemented method includes determining, by a tape drive, that a magnetic recording tape is compatible with a first format, the tape drive having an array of transducers including subarrays of the transducers positioned on opposite sides of an inner transducer, reading from or writing to the magnetic recording tape using the array in a first mode of operation corresponding to the first format, processing data using only transducers in the subarrays in the first mode of operation, and processing data using only a portion of transducers in each subarray in a second mode of operation corresponding to the second format. The first format specifies locations of data and a contiguous spare area on the tape and compatibility with a second format. The second format specifies a set of second active channels different than a set of first active channels specified by the first format.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: October 22, 2019
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10453483
    Abstract: An apparatus according to an embodiment includes an array of transducers including an inner transducer and subarrays of the transducers positioned on opposite sides of the inner transducer, and a controller coupled to the transducers. The controller is configured to process data using only the transducers in the subarrays in a first mode of operation. Moreover, the controller is configured to process data using only a portion of the transducers in each of the subarrays in a second mode of operation, where the inner transducer is inactive in the second mode of operation.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: October 22, 2019
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10446212
    Abstract: According to one embodiment, a magnetic memory device includes a first magnetic portion, a first electrode, a second electrode, a third electrode, a second magnetic portion, a first nonmagnetic portion, and a controller. The first magnetic portion includes an extension portion and a third portion. The extension portion includes a first portion and a second portion. The third portion is connected to the second portion. The first electrode is electrically connected to the first portion. At least a portion of the third portion is positioned between the second electrode and the third electrode. The second magnetic portion is provided between the second electrode and the at least a portion of the third portion. The first nonmagnetic portion is provided between the second magnetic portion and the at least a portion of the third portion. The controller is electrically connected to the first, second electrode, and third electrodes.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: October 15, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Susumu Hashimoto, Yasuaki Ootera, Tsuyoshi Kondo, Takuya Shimada, Michael Arnaud Quinsat, Masaki Kado, Nobuyuki Umetsu, Shiho Nakamura, Tomoya Sanuki, Yoshihiro Ueda, Shinji Miyano, Hideaki Aochi, Yasuhito Yoshimizu, Yuichi Ito
  • Patent number: 10446179
    Abstract: An apparatus according to one embodiment includes an array of 2N+1 transducers and a controller directly electrically coupled to each of the transducers, where the controller is configured to use transducers on only one side of a centerline of the array in a first mode of operation.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: October 15, 2019
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10437270
    Abstract: In accordance with embodiments of the present disclosure, an information handling system may include a processor and a storage resource communicatively coupled to the processor. The storage resource may be configured to monitor one or more operating parameters of the storage resource indicative of vibration external to the storage resource affecting performance of the storage resource, determine whether the one or more operating parameters exceed respective threshold values, and in response to determining that the one or more operating parameters exceed a respective threshold value, communicate an indication from the storage resource to a subsystem of the information handling system that the storage resource is experiencing excessive vibration from sources external to the storage resource.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 8, 2019
    Assignee: Dell Products L.P.
    Inventors: Haesung Kwon, Chandrashekar Nelogal, David M. Pereira
  • Patent number: 10436289
    Abstract: An automatic transmission includes an input shaft; an output shaft; a first planetary gear set including rotation elements; a second planetary gear set connected to the input shaft, and including a rotation element which is connected with the first planetary gear set; a third planetary gear set including a rotation element which is connected with the first planetary gear set, and connected with the output shaft; a fourth planetary gear set including rotation elements which are connected with the second planetary gear set and the third planetary gear set, respectively; a rotation shaft unit connected to the first to the fourth planetary gear sets, and transferring power; three clutches selectively connecting predetermined elements of the rotation shaft unit or selectively connecting predetermined elements of the rotation shaft unit and the input shaft; and four brakes selectively connecting predetermined elements of the rotation shaft unit and a transmission housing.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: October 8, 2019
    Assignee: HYUNDAI POWERTECH CO., LTD.
    Inventor: Tae Hoon Kim
  • Patent number: 10435496
    Abstract: Disclosed herein are water-soluble polymers comprising hydrolyzable cross-linked monomer units, and methods for recovering hydrocarbon fluids from a subterranean formation using the water-soluble polymers.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: October 8, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Peter E. Reed, William J. Andrews, Mingli Wei, Xiaojin Harry Li
  • Patent number: 10431256
    Abstract: Methods, apparatuses and systems for detecting defective sectors on a recording medium. A defective sector detector apparatus comprises an error-corrected ECC symbol number calculator and a defective sector determination unit. The error-corrected ECC symbol number calculator is configured to count a total number of error correcting code (“ECC”) symbols that are error-corrected in data read from data sectors on a track of a recording medium of the storage device. The defective sector determination unit is configured to receive the total number of ECC symbols that are error-corrected for a data sector from the error-corrected ECC symbol number calculator and determine whether the total number of ECC symbols that are error-corrected exceeds a threshold value. If it is determined that the total number of ECC symbols that are error-corrected exceeds the threshold value, the defective sector determination unit outputs information indicating the data sector to be a defective sector.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: October 1, 2019
    Assignee: Seagate Technology LLC
    Inventor: Walter Jun
  • Patent number: 10422829
    Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: September 24, 2019
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
  • Patent number: 10410662
    Abstract: A disc drive includes a data storage surface having a system data zone and a user data zone, and a head that communicates with the data storage surface. The disc drive also includes a control circuit communicatively coupled to the head. The control circuit is configured to, during power up initialization of the disc drive, apply a fly height control value to direct the head to fly at a first target fly height for reading system data from the system data zone. The first target fly height is substantially higher than a second target fly height for reading user data from the user data zone. The control circuit determines whether an actual fly height of the head is substantially equal to the first target fly height. The control circuit performs fly height correction when the actual fly height is not substantially equal to the first target fly height.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: September 10, 2019
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Xiong Liu, Quan Li, Lihong Zhang, Chengyi Guo