Monitoring Or Testing The Progress Of Recording Patents (Class 360/31)
  • Patent number: 11347573
    Abstract: A method for identifying a drive malfunction source includes receiving as input multiple drive event records each recorded by a different one of multiple storage drives in a mass storage system. Among other data, each one of the drive event records including internal tasks performed by the associated storage drive and communications transmitted between an external host and a controller of the associated storage drive. The method may further include comparing the drive event records using a processor to identify at least one discrepancy in recorded drive events indicative of the drive malfunction source.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: May 31, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Abhay T. Kataria, Harathi Tadepalli, Robert Pomeroy, Daniel J. Coonen, Brandon W. Muhlach
  • Patent number: 11330771
    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: September 3, 2020
    Date of Patent: May 17, 2022
    Assignee: POSITEC POWER TOOLS (SUZHOU) CO., LTD.
    Inventors: Mingming He, Gen Sun, Yue Rao, Yong Shao, Fangshi Liu, Jun Wu, Chang Zhou
  • Patent number: 11321181
    Abstract: A data protection scheduling system provides a flexible or rolling data protection window that analyzes various criteria to determine an optimal or near optimal time for performing data protection or secondary copy operations. While prior systems may have scheduled backups at an exact time (e.g., 2:00 a.m.), the system described herein dynamically determines when to perform the backups and other data protection storage operations, such as based on network load, CPU load, expected duration of the storage operation, rate of change of user activities, frequency of use of affected computer systems, trends, and so on.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: May 3, 2022
    Assignee: Commvault Systems, Inc.
    Inventor: Rajiv Kottomtharayil
  • Patent number: 11301147
    Abstract: A method for adaptive concurrency for write persistence in a storage system, performed by the storage system, is provided. The method includes selecting a write process from among a plurality of write processes, responsive to receiving a write request for writing data into the storage system, and writing the data into the storage system in accordance with the selected write process. One of the plurality of write processes includes transferring the data into the storage system, locking an inode associated with file information of the data in memory, updating the file information in the inode while the inode is locked, committing the data while the inode is locked, and unlocking the inode.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: April 12, 2022
    Assignee: Pure Storage, Inc.
    Inventors: John Colgrove, Robert Lee, Igor Ostrovsky, Guangyu Shi, Peter Vajgel
  • Patent number: 11276432
    Abstract: A data storage device is disclosed comprising a head actuated over a magnetic media, wherein the head comprises a write coil, a laser configured to heat the magnetic media during a write operation, and a read element. A test pattern is written to the magnetic media by applying a current to the write coil and a first bias to the laser. A second bias is applied to the laser while the head passes over the test pattern, and then the test pattern is read from the magnetic media using the head to generate a first read signal. A first noise power of the first read signal is measured, and at least one parameter of a noise power function is generated based on the first noise power measurement, wherein the noise power function is a function of at least the bias applied to the laser.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: March 15, 2022
    Inventors: Pierre-Olivier Jubert, Andreas Moser, Daniel S. Wolf, Toan Tang, Thien Nguyen, Harold H. Gee
  • Patent number: 11239854
    Abstract: A non-linearity correction circuit includes a non-linearity coefficient estimation circuit. The non-linearity coefficient estimation circuit includes a data capture circuit, a non-linearity term generation circuit, a time-to-frequency conversion circuit, a bin identification circuit, a residual non-linearity conversion circuit, and a non-linearity coefficient generation circuit. The non-linearity term generation circuit is coupled to the data capture circuit. The time-to-frequency conversion circuit is coupled to the data capture circuit and the non-linearity term generation circuit. The bin identification circuit is coupled to the time-to-frequency conversion circuit. The residual non-linearity conversion circuit is coupled to the bin identification circuit. The non-linearity coefficient generation circuit is coupled to the bin identification circuit and the residual non-linearity conversion circuit.
    Type: Grant
    Filed: October 2, 2020
    Date of Patent: February 1, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jawaharlal Tangudu, Pankaj Gupta, Sreenath Narayanan Potty, Ajai Paulose, Chandrasekhar Sriram, Mahesh Ravi Varma, Shabbar Abbasi Vejlani, Neeraj Shrivastava, Himanshu Varshney, Divyeshkumar Mahendrabhai Patel, Raju Kharataram Chaudhari
  • Patent number: 11228288
    Abstract: According to a first aspect of the embodiments, a microphone mixer is provided comprising: an input adapted to receive differential microphone (mic) output signals; a gain-trim circuit adapted to receive the differential mic output signals, and which includes a substantially fully differential amplifier adapted to amplify the received differential mic output signals through use of a gain-trim output adjustment device that provides a variable gain amount ranging from a first gain-trim gain value to a second gain-trim gain value, to produce differential gain-trim circuit output signals; a fader circuit adapted to receive the differential gain-trim circuit output signals, and which includes a differential amplifier adapted to attenuate the received differential gain-trim circuit output signals through use of a fader output adjustment device that provides a variable gain amount ranging from a first fader gain value to a second fader value; and a common adjustment apparatus that mechanically ties the gain-trim out
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: January 18, 2022
    Assignee: Crestron Electronics, Inc.
    Inventors: Philip Bellingham, Krunoslav Draganovic
  • Patent number: 11216058
    Abstract: Systems and methods are disclosed, including, after a first threshold time after entering an idle power mode of a storage system, without receiving a command from a host device over a communication interface, moving host data stored in volatile memory of the storage system to non-volatile memory of the storage system and transitioning a power mode of the storage system from an idle power mode to a deep idle power mode using control circuitry of the storage system, the deep idle power mode having a second power level lower than a first power level of the idle mode and a second exit latency higher than a first latency of the idle mode. The control circuitry can further determine that the storage system is ready to enter a power savings power mode and provide an indication of the determination using a unidirectional power state signal interface separate from the communication interface.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: January 4, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Qing Liang, Jonathan Scott Parry
  • Patent number: 11210195
    Abstract: An embodiment of a semiconductor apparatus may include technology to receive a request for storage-related resources, and demand-query one or more persistent storage media devices for device-determined performance-related information in response to the request, where the device-determined performance-related information is based on dynamically measured performance of persistent storage media of the device itself. Other embodiments are disclosed and claimed.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: December 28, 2021
    Assignee: Intel Corporation
    Inventors: Jason Casmira, Jawad Khan, David Minturn
  • Patent number: 11200911
    Abstract: A data storage device is disclosed comprising a head actuated over a magnetic media comprising a plurality of data tracks, wherein each data track comprises a plurality of data sectors. A first codeword is encoded, and the first codeword is written to multiple data sectors of a first data track including a first data sector. A second codeword is encoded, and at least part of the second codeword to is written to the multiple data sectors of a second data track adjacent the first data track including a second data sector adjacent the first data sector of the first data track. The first codeword is partially written to at least the first data sector of the first data track when the first data sector of the first data track is corrupted by writing the second codeword to the second data track.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: December 14, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Scott E. Burton, Gregory B. Thelin, Steven Vasquez
  • Patent number: 11194520
    Abstract: There are provided a memory system and an operating method thereof. In a method for operating a memory system, the method includes generating a write request for write data; reading chunk data from a buffer memory in response to the write request; caching the chunk data in a cache memory; generating a read request for read data; and outputting a portion of the cached chunk data as the read data from the cache memory when the read data is included in the cached chunk data.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: December 7, 2021
    Assignee: SK HYNIX INC.
    Inventor: Do Hun Kim
  • Patent number: 11189316
    Abstract: In an approach to adaptive tape calibration criteria based on the number of stop writes, the number of rewrite occurrences caused by a stop write is determined for each specific tape drive type. Responsive to detecting a stop write during a write operation, the total number of stop writes is stored on the tape drive. A rewrite calibration threshold is determined, where the rewrite calibration threshold includes the total number of stop writes on the tape drive and a calibration reference value for the specific tape drive type. Responsive to the number of rewrite occurrences caused by the stop write exceeding the rewrite calibration threshold while writing a data set on the tape drive, a calibration of the tape drive is performed.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: November 30, 2021
    Assignee: International Business Machines Corporation
    Inventors: Tsuyoshi Miyamura, Keisuke Tanaka, Ernest Stewart Gale
  • Patent number: 11152025
    Abstract: According to an embodiment, a magnetic disk device includes a magnetic disk including a first storage area and a second storage area different from the first storage area. In the second storage area, both of a first post code that is used to write user data in the first storage area by a first method and a second post code that is used to write user data in the first storage area by a second method are stored in advance. The first method is a method in which one track between two tracks adjacent to each other overlaps a part of the other track between the two tracks. The second method is a method in which two adjacent tracks do not overlap each other.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: October 19, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Masakazu Tsuruoka, Fumiya Kudo, Takao Abe
  • Patent number: 11145332
    Abstract: Systems and methods for proactive transfer of stored data between storage zones to avoid anticipated bit rot are provided. In embodiments, a method includes: determining that one or more quality prediction parameters of a storage zone of a data storage device meet a predetermined threshold for user access or adjacency to another storage zone determined to be unhealthy; and initiating a proactive refreshing of the storage zone based on the determining that the storage zone meets the predetermined threshold, the proactive refreshing of the storage zone including: reading all data in the storage zone; determining that no errors have occurred during the reading of the data; and based on the determination that no errors have occurred, moving all of the data of the storage zone to a new storage zone.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: October 12, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ilya Volvovski, Praveen Viraraghavan, Jordan Harrison Williams, Benjamin Lee Martin, Manish Motwani
  • Patent number: 11138993
    Abstract: One or more write efficiency metrics are determined. The one or more write efficiency metrics are associated with a tape storage drive while the tape storage drive is operating on one or more tape storage media cartridges to write data sets to the one or more tape storage media cartridges. It is predicted whether the tape storage drive would be able to write an entire set of data sets to a current tape storage media cartridge based on the one or more write efficiency metrics. It is determined whether a different tape storage drive is to be utilized to complete writing of the entire set of data sets to the current tape storage media cartridge based on the prediction.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: October 5, 2021
    Assignee: Facebook, Inc.
    Inventors: Yu Cai, Chengyan Fu, Haoci Zhang, John Mah
  • Patent number: 11120831
    Abstract: A computer data storage system receives a plurality of data units from a host computer. The system stores the data units in a buffer memory. The system generates a plurality of data segments comprising a plurality of subsets of the plurality of data units. The system receives a plurality of dataset information tables (DSITs) corresponding to the plurality of data segments. The system appends the plurality of DSITs to the respectively corresponding plurality of data segments, to create a plurality of datasets stored in the buffer memory. The system determines a number of datasets stored in the buffer memory, exceeds a threshold value. And in response to determining the number of datasets, of the plurality of datasets stored in the buffer memory, exceeds the threshold value, the system stops the appending the plurality of DSITs to the respectively corresponding plurality of data segments.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: September 14, 2021
    Assignee: International Business Machines Corporation
    Inventors: Junta Watanabe, Hironobu Nagura
  • Patent number: 11086740
    Abstract: Embodiments of the present disclosure relate to a method, system and computer program product for maintaining a storage array online. According to the method, an unrecoverable error is detected by one or more processors as having occurred in a failed disk of a storage array in first storage. The failed disk is replaced with a spare disk in the first storage. Data is retrieved from a second storage for storing into a stripe of the first storage based on address information of a data block of the failed disk. The second storage stores mirrored data of data stored in the first storage. The stripe includes data blocks distributed across all disks in the storage array of the first storage. The retrieved data is caused to be written into the stripe of the storage array of the first storage. In other embodiments, a system and a computer program product are disclosed.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: August 10, 2021
    Assignee: International Business Machines Corporation
    Inventors: Bo Zou, Yang Liu
  • Patent number: 11030040
    Abstract: A memory device includes a write error check circuit suitable for detecting an error in received data using an error correction code during a write operation; and a memory core suitable for storing the received data and the received error correction code when no error is detected by the write error check circuit.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: June 8, 2021
    Assignee: SK hynix Inc.
    Inventors: Hoiju Chung, Young-Do Hur, Hyuk Lee, Jang-Ryul Kim
  • Patent number: 10957343
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head which writes data to the disk and reads data from the disk, and a controller which executes, in a first region segmented in a radial direction of the disk, at least one of conventional recording processing which writes a plurality of tracks with a space in between in the radial direction at a first linear recording density and shingled recording processing which writes a plurality of tracks on top of one another in the radial direction at a second linear recording density which is less than or equal to the first linear recording density.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: March 23, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Yusuke Tomoda
  • Patent number: 10930309
    Abstract: A tape drive may calculate the slopes for three successive timing-based-servo marks in a timing-based-servo group. The timing-based-servo marks may be arranged in a one or more M-patterns. The three successive timing-based-servo marks may be across the one or more M-patterns. The tape drive may perform a parabolic fit of a gradient of the slopes. The tape drive may determine whether the gradient is demonstrative of tape-creep.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: February 23, 2021
    Assignee: International Business Machines Corporation
    Inventors: Daniel James Winarski, Nhan Xuan Bui, Lee Curtis Randall, Richard Bradshaw
  • Patent number: 10923144
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a head including a write head that writes data to the disk, and a first read head and a second read head that read data from the disk, and a controller that, in reading a first track of a first region of the disk, positions a middle portion of the first read head and the second read head at a first track center of the first track, and in reading a second track of a second region of the disk different from the first region, positions any one of the first read head and the second read head at a second track center of the second track.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: February 16, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Nobuhiro Maeto
  • Patent number: 10910002
    Abstract: One or more write efficiency metrics are determined. The one or more write efficiency metrics are associated with a tape storage drive while the tape storage drive is operating on one or more tape storage media cartridges to write data sets to the one or more tape storage media cartridges. It is predicted whether the tape storage drive would be able to write an entire set of data sets to a current tape storage media cartridge based on the one or more write efficiency metrics. It is determined whether a different tape storage drive is to be utilized to complete writing of the entire set of data sets to the current tape storage media cartridge based on the prediction.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: February 2, 2021
    Assignee: Facebook, Inc.
    Inventors: Yu Cai, Chengyan Fu, Haoci Zhang, John Mah
  • Patent number: 10902870
    Abstract: According to one embodiment, a drive-implemented method includes, in a first mode of operation, processing data using only transducers of subarrays positioned on opposite sides of an inner transducer in an array of transducers, and processing data using only a portion of the transducers in each of the subarrays in a second mode of operation, wherein the inner transducer is inactive in the second mode of operation.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: January 26, 2021
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10902877
    Abstract: A recording and reproducing device includes: a first acquisition unit which acquires servo band interval information representing an interval, in a width direction of a magnetic tape, between adjacent servo recording elements of plural servo recording elements which record the servo patterns on the plural servo bands, respectively; a second acquisition unit which acquires reproducing element interval information representing an interval in the width direction between respective servo reproducing elements which read the adjacent servo patterns along the width direction with respect to the plural tape drives; and a selection unit which selects a tape drive into which the magnetic tape is inserted, from the plural tape drives, using a value representing a difference between the interval represented by the servo band interval information and the interval represented by the reproducing element interval information.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: January 26, 2021
    Assignee: FUJIFILM CORPORATION
    Inventors: Yusuke Kagawa, Tetsuya Kaneko
  • Patent number: 10896113
    Abstract: A method for lighting a backplane lamp of multiple NVMe hard disks is provided. The method includes: transmitting a VPP address to the backplane in a cyclic manner by the controller, and analyzing the address transmitted by the controller by a programmable logic device of the backplane after a data stream transmitted by the controller is received; transmitting, by the controller, hard disk lamp lighting information of a corresponding disk position to the programmable logic device of the backplane, if a VPP address analyzed by the backplane is the same as the VPP address transmitted by the controller; and performing logical conversion on the hard disk lamp lighting information, to convert a serial data stream on the VPP signal wires into a parallel signal, lighting a backplane lamp at a corresponding port, and uploading information of a position of the hard disk to the controller.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: January 19, 2021
    Assignee: ZHENGZHOU YUNHAI INFORMATION TECHNOLOGY CO., LTD.
    Inventor: Shichao Cheng
  • 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: 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: 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: 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: 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: 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: 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