Controlling The Record Patents (Class 360/71)
  • Patent number: 10418056
    Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: September 17, 2019
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Tzung-Sz Shen, Bin Huang, Raye Sosseh, Ying Qi
  • Patent number: 10304480
    Abstract: Described is a tape library system that generally comprises a plurality of tape drives and a data bus that links a host computer system to a first tape drive address and a second tape drive address. However, the first tape drive address points to a first controller and switch system that assumes the identity of one of the tape drives. The first controller and switch system is linked to a first tape drive adapted to cooperate with a first type of tape cartridge and a second tape drive adapted to cooperate with second type of tape cartridge. The second tape drive address points to a second controller and switch system that assumes the identity of a different one of the tape drives. The second controller and switch system is linked to a third tape drive adapted to cooperate with the first type of tape cartridge and a third tape drive adapted to cooperate with the second type of tape cartridge.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 28, 2019
    Assignee: Spectra Logic Corporation
    Inventor: Matthew Thomas Starr
  • Patent number: 10296461
    Abstract: According to one embodiment, a storage device includes a first nonvolatile memory, a second volatile memory, and a controller. In the second volatile memory, at least one of management information for managing user data written in the first nonvolatile memory and the user data is temporarily written as cache data. The controller is configured to execute processing for writing the cache data written in the second volatile memory to a third memory of the host device, if the storage device is changed from a regular mode to a low power consumption mode in which supplying of power to the second volatile memory is stopped, in response to a request from a host device.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: May 21, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Takayuki Takano
  • Patent number: 10112418
    Abstract: A part detecting device of a carrier tape includes a transporting passage, a part detector, and a biasing mechanism that presses the part detector against the carrier tape inside the transporting passage. The carrier tape is transported to the transporting passage. The part detector detects parts stored in storages which are formed on the carrier tape passing through the transporting passage at regular intervals.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: October 30, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masashi Matsumori, Takashi Nakamura
  • Patent number: 10057351
    Abstract: A method for execution by a dispersed storage (DS) client module includes receiving a write request for a first data object. A set of storage units associated with the first data object are identified, and an availability level is determined. The DS client module determines to modify dispersal parameters associated with the set based on the availability level, and modified dispersal parameters are determined based on current dispersal parameters and the availability level. Encoded slices are generated by performing an encoding function on the first data object using the modified dispersal parameters, and the slices are sent to the storage units. A second data object stored in the identified set of storage units is recovered by utilizing the current dispersal parameters. Encoded slices are generated by performing an encoding function on the second data object using the modified dispersal parameters, and the slices are sent to the storage units.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: August 21, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Andrew D. Baptist, Asimuddin Kazi
  • Patent number: 10043543
    Abstract: In a device with first and second heads, the second head is held at a radial location over one or more disks via a second actuator that moves the second head. A position error of the second head is read while performing a seek with a first actuator, the first actuator moving the first head over the one or more disks. A mechanical transfer function is determined between the first actuator and the second actuator based on the position error of the second head. The mechanical transfer function is used to provide compensation for the second head via the second actuator in response to subsequent seek of the first actuator.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: August 7, 2018
    Assignee: Seagate Technology LLC
    Inventors: Bruce Douglas Buch, Mehmet Fatih Erden
  • Patent number: 9997191
    Abstract: A library manager to determine a relay-point library string when a particular cartridge (specific cartridge) is moved to an empty drive (target drive) for mounting. A method for determining a relay-point library string includes: receiving a command to mount a cartridge in a library string located on one side of the relay-point library string; searching for the target drive among library strings, and finding the target drive in a library string on the other side of an interposed relay-point library string relative to the library string in which the specific cartridge is located; selecting a relay-point library string based on predetermined conditions to move the specific cartridge using shuttle connections to the found target drive; and searching to determine whether or there is a newly available drive in a relay-point library string other than the selected relay-point library string before the selected cartridge reaches the selected relay-point library string.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: June 12, 2018
    Assignee: International Business Machines Corporation
    Inventors: Naoki Imai, Takamasa Hirata, Masanori Kamiya, Norie Iwasaki
  • Patent number: 9953676
    Abstract: In one embodiment, an apparatus includes an accessor configured to transport data storage cartridges in a library environment, and a bracket configured to receive a wireless image capture device therein where the bracket is positioned to orient the wireless image capture device to capture images while the accessor is transporting data storage cartridges. In another embodiment, a method for mounting a wireless capture device to an accessor to capture images of an operation in a data storage library includes mounting a bracket to the accessor, where the accessor is configured to transport data storage cartridges in a library environment, where the bracket is configured to receive a wireless image capture device therein. The bracket is mounted in a position to orient the wireless image capture device to capture images while the accessor is transporting data storage cartridges.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 24, 2018
    Assignee: International Business Machines Corporation
    Inventors: Luis R. Macias, Shawn M. Nave
  • Patent number: 9940051
    Abstract: A data storage device that includes a magnetic storage device selects one or more power states of the magnetic storage device based on a time interval since a most recent time data has been read from or written to the magnetic storage device. The power state of the magnetic storage device can be changed from a higher power consumption state to a lower power consumption state when the time interval exceeds a predetermined value. The power consumption state may be changed from an active servo state to an intermediate power consumption state, a park state, and/or a standby state, depending on the time elapsed since the most recent time data has been read from or written to the magnetic storage device.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 10, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Richard M. Ehrlich, Eric R. Dunn, Daniel Tchen, Annie Mylang Le, Mine Wonkyung Budiman, Fernando Anibal Zayas
  • Patent number: 9916869
    Abstract: A method of servicing a data storage library having at least one access opening and at least one access door to permit access to an interior of the data storage library, the method including providing at least one barrier configured to at least partially surround the at least one library access opening when the at least one access door is opened, wherein the at least one barrier is configured to resist environmental conditions from exterior the barrier and data storage library from intruding into the interior of data storage library when the barrier is deployed. The method also includes deploying the at least one barrier when the at least one access door is opened to form an interior working space, accessing the interior space formed by the at least one barrier, and accessing the interior of the data storage library via the at least one library access opening.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: March 13, 2018
    Assignee: International Business Machines Corporation
    Inventors: Jose G. Miranda Gavillan, Brian G. Goodman, Kenny Nian Gan Qiu
  • Patent number: 9793890
    Abstract: In accordance with an embodiment, a method of driving a switching transistor includes receiving an activation signal for the switching transistor and generating a sequence of random values. Upon receipt of the activation signal, a control node of the switching transistor is driven with a drive strength based on a random value of the sequence of random values.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: October 17, 2017
    Assignee: Infineon Technologies Austria AG
    Inventors: Uwe Kirchner, Harald Christian Koffler, Karl Norling
  • Patent number: 9761266
    Abstract: A data storage device is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings. The windings of the spindle motor are commutated based on a commutation sequence while applying a driving voltage to each winding, wherein the driving voltage comprises an operating polarity during normal operation. When a supply voltage falls below a threshold while the spindle motor is rotating the disk, the spindle motor is configured into a power generator by at least reversing the polarity of the driving voltage for an interval and then reversing the polarity of the driving voltage back to the operating polarity.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: September 12, 2017
    Assignee: Western Digital Technologies, Inc.
    Inventor: Michael T. Nicholls
  • Patent number: 9716447
    Abstract: Embodiments of an integrated motor drive power electronics system are generally described herein. In some embodiments, the integrated motor drive power electronics system includes an active line filter (ALF) configured to control and regulate current drawn from an input power source and to attenuate current ripple fed back to the input power source, an energy storage capacitance coupled to an output of the active line filter, and a bidirectional low voltage power supply (LVPS). In some embodiments, the bidirectional LVPS may provide regulated power to a load and may selectively recycle power back to the input power source and regulate voltage at the load to a predetermined output voltage. In some embodiments, the energy storage capacitance may serve as a local input power source for higher power motor drive electronics and the bidirectional LVPS.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: July 25, 2017
    Assignee: Raytheon Company
    Inventor: Joe Anthony Ortiz
  • Patent number: 9715894
    Abstract: Embodiments include systems and methods for providing throughput increase and/or physical expansion of a data storage library. Some embodiments include multiple robotic assemblies, each having its own hand assembly, which are electrically and mechanically integrated for concurrent use in a single storage library environment for increased throughput. Other embodiments include an active vertical pass-through assembly that operates to ferry cartridges from one storage library environment to another, vertically adjacent storage library environment. Some such embodiments use existing robotic mechanisms of the libraries to exploit a shared slot through which vertical pass-through functionality can be realized. Other embodiments include an active horizontal pass-through assembly that operates to ferry cartridges from one storage library environment to another, horizontally adjacent storage library environment.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: July 25, 2017
    Assignee: Oracle International Corporation
    Inventors: Timothy Craig Ostwald, Joseph Paul Manes
  • Patent number: 9710819
    Abstract: A computing system accepts audio from one or more sources, parses the audio into chunks, and transcribes the chunks in substantially real time. Some transcription is performed automatically, while other transcription is performed by humans who listen to the audio and enter the words spoken and/or the intent of the caller (such as directions given to the system). The system provides for participants a user interface that is updated in substantially real time with the transcribed text from the audio stream(s). A single audio line can be used for simple transcription, and multiple audio lines are used to provide a real-time transcript of a conference call, deposition, or the like. A pool of analysts creates, checks, and/or corrects transcription, and callers/observers can even assist in the correction process through their respective user interfaces. Ads derived from the transcript are displayed together with the text in substantially real time.
    Type: Grant
    Filed: November 15, 2009
    Date of Patent: July 18, 2017
    Assignee: Interactions LLC
    Inventors: Michael Eric Cloran, David Paul Heitzman, Mitchell Gregory Shields, Jeromey Russell Goetz
  • Patent number: 9691418
    Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: June 27, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Wenzhong Zhu, Kenneth A. Haapala, Bin Huang
  • Patent number: 9575887
    Abstract: A memory device according to an embodiment includes a non-volatile storage device, a volatile storage device that stores saved data which is saved in the host-side storage device when a first operation mode changing process is executed by the memory device, and a control unit. The control unit transmits, to the host device, a write command that is an instruction to write the saved data to the host-side storage device and the saved data, when the first operation mode changing process is executed by the memory device.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: February 21, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shoji Sawamura, Nobuhiro Kondo, Takaya Horiki, Daisuke Iwai
  • Patent number: 9569128
    Abstract: A storage device includes a nonvolatile memory unit, a volatile memory unit, a power supply control unit configured to control power supply to the nonvolatile memory unit and the volatile memory unit, and a control unit configured to control the power supply unit to cut off the power supply to the nonvolatile memory unit and the volatile memory unit during a first operation, and control the power supply unit to cut off the power supply to the nonvolatile memory unit and to maintain the power supply to the volatile memory unit during a second operation that is different from the first operation.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: February 14, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Taro Iketaki
  • Patent number: 9564160
    Abstract: Methods, systems, and computer program product embodiments for improving track-follow control in a tape storage system, by a processor device, are provided. In one embodiment, a method comprises, using an accelerometer to dynamically detect device vibration for determining whether to implement a vibration compensation control mechanism.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: February 7, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nhan X. Bui, Angeliki Pantazi, Tomoko Taketomi
  • Patent number: 9481090
    Abstract: An apparatus (01) configured for identifying numbers for layers having objects thereon within a container (02), the objects being accommodated in the container and arranged in layers. the apparatus comprising: an optical fiber sensor (10) configured for detecting presence or absence of the objects from layers within a detecting range; a support frame (20) configured for carrying the optical fiber sensor (10); a guide rail (60) configured for defining a moving direction of the support frame (20); a motor (40) and driving mechanism (30) configured for driving the optical fiber sensor to move along the guide rail; and a controller (50) connected with the optical fiber sensor (10) and the motor (40), wherein the controller (50) is at least configured for obtaining the numbers for the layers having objects thereon according to a moving distance of the support frame (20), in the case that the presence of the objects is detected by the optical fiber sensor (10).
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 1, 2016
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Shengguang Sang, Jiangtao Zhang, Jun Zhang, Jie Deng
  • Patent number: 9449619
    Abstract: A tape appliance that includes two read heads and two write heads arranged along a magnetic tape path. The heads are configured such that for a first longitudinal direction of tape travel along the tape path, the tape engages the tape bearing surface of a first one of the write heads followed by engaging the tape bearing surface of a first one of the read heads and flies over the tape bearing surfaces of the other write head and the other read head. For the reverse longitudinal direction of tape travel along the tape path, the tape engages the tape bearing surface of the other write head followed by engaging the tape bearing surface of the other read head and flies over the tape bearing surfaces of the first write head and the first read head.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: September 20, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Robert G. Biskeborn
  • Patent number: 9354818
    Abstract: According to one embodiment, a data storing method includes saving data stored in a memory device to a host device and verifying validity or accuracy of the data saved in the host device.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: May 31, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yaotung Kuo, Koichi Nagai, Shoji Sawamura, Nobuhiro Kondo
  • Patent number: 9334117
    Abstract: A library manager to determine a relay-point library string when a particular cartridge (specific cartridge) is moved to an empty drive (target drive) for mounting. A method for determining a relay-point library string includes: receiving a command to mount a cartridge in a library string located on one side of the relay-point library string; searching for the target drive among library strings, and finding the target drive in a library string on the other side of an interposed relay-point library string relative to the library string in which the specific cartridge is located; selecting a relay-point library string based on predetermined conditions to move the specific cartridge using shuttle connections to the found target drive; and searching to determine whether or there is a newly available drive in a relay-point library string other than the selected relay-point library string before the selected cartridge reaches the selected relay-point library string.
    Type: Grant
    Filed: July 21, 2013
    Date of Patent: May 10, 2016
    Assignee: International Business Machines Corporation
    Inventors: Naoki Imai, Takamasa Hirata, Masanori Kamiya, Norie Iwasaki
  • Patent number: 9218839
    Abstract: An apparatus for operating a tape storage device comprises a first tape skew determination unit for providing a first tape skew value concerning a skew of a tape in the tape storage device, and a second tape skew determination unit for providing a second tape skew value concerning the skew of the tape. An actuator adjusts one or more of a rotational orientation of a tape head of the tape storage device which tape head is provided for reading and/or writing data from/to the tape, and a motion direction of the tape dependent on the first tape skew value and the second tape skew value.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: December 22, 2015
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Giovanni Cherubini, Jens Jelitto, Angeliki Pantazi
  • Patent number: 9207749
    Abstract: A mechanism is described for facilitating efficient operations paths for storage devices in computing systems according to one embodiment of the invention. A method of embodiments of the invention includes identifying a request for power mode change at a storage device at a computing system. The request for power mode change indicates potential reduced power state of the storage device. The method may further include transferring context information at the storage device to a host memory at the computing system, in response to the first command, and saving the context information at the host memory, wherein the storage device is at reduced power state.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: December 8, 2015
    Assignee: Intel Corporation
    Inventors: Nimrod Diamant, Ohad Falik, Itay Franko, Robert W. Strong
  • Patent number: 9159347
    Abstract: A method according to one embodiment includes generating track following controller state information based on a positional signal of a head relative to a medium. One or more portions of the state information corresponding to particular frequencies are used to determine at least one of: lateral tape movement, tape skew, vibration operation conditions, and roller performance.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: October 13, 2015
    Assignee: International Business Machines Corporation
    Inventors: Nhan X. Bui, Angeliki Pantazi, Tomoko Taketomi
  • Patent number: 9141176
    Abstract: Power management for a data storage device (DSD). A number of host commands is counted within a predetermined time period. Data is stored on at least one disk of the DSD or in a solid state memory of the DSD based on whether the number of commands within the predetermined time period exceeds a threshold number of commands. According to another aspect, a performance mode for operation of a DSD is set based on a number of consecutive time periods where the DSD receives more than a threshold number of host commands. A power saving mode for operation of the DSD is set based on a number of consecutive time periods where the DSD receives less than the threshold number of host commands.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: September 22, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventor: Huayuan Chen
  • Patent number: 9064532
    Abstract: A method according to one embodiment includes computing a radius value of a tape on an outgoing reel during unwinding of the tape from the outgoing reel, adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position, and outputting the adjusted computed radius. A method according to another embodiment includes computing a radius value of a tape on an incoming reel during winding while the tape is being wound onto the incoming reel, adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position, and outputting the adjusted computed radius.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: June 23, 2015
    Assignee: International Business Machines Corporation
    Inventors: Reed A. Hancock, Randy C. Inch, Eiji Ogura
  • Publication number: 20150124347
    Abstract: In one embodiment, a magnetic head includes a main pole configured to write data to a magnetic medium, a trailing shield positioned on a trailing side of the main pole, and a STO between the main pole and the trailing shield, wherein the STO includes a laminated structure having a FGL, a spun polarization layer (SPL), and a non-magnetic spacer positioned between the FGL and the SPL, wherein the FGL includes a laminated structure having one or more layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer. In another embodiment, a method is presented for forming such a magnetic head utilizing a FGL that includes a laminated structure baying layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 7, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Masato Shimoto, Keiichi Nagasaka, Masato Matsubara, Yo Sato
  • Publication number: 20150124348
    Abstract: Provided are a method, system, and program for adjusting tension in a tape media to counter tape dimensional stability (TDS) errors in a tape media. A determination is made of whether to adjust tension of the tape media based on a detected error rate of reading at least one of the tracks. The tension of the tape media is adjusted in response to determining to adjust the tension.
    Type: Application
    Filed: January 15, 2015
    Publication date: May 7, 2015
    Inventors: Nhan X. Bui, Reed A. Hancock, Kevin B. Judd
  • Patent number: 9025261
    Abstract: A mechanism is provided for determining storage device speed based on a ratio of data compression. A bandwidth (B) is identified between a storage device accessing storage medium and a host application requesting access to data on the storage medium. A host side transfer rate is identified, where the host side transfer rate (HSTR) is a rate of data transfer between the host application and the storage device. For each data set in a set of data sets of a record, a ratio of data compression (R) is identified for the data set; a compression considered host side transfer rate (CCHSTR) is determined; and the storage device speed is set to the compression considered host side transfer rate (CCHSTR) for transmitting the data set to the host application.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: May 5, 2015
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Yutaka Oishi
  • Patent number: 8982502
    Abstract: In one embodiment, a hard disk drive includes a magnetic disk medium, a magnetic head adapted for writing data to the magnetic disk medium, a mechanism (such as a detection circuit) adapted for detecting at least one recording condition of drive current provided to the magnetic head during writing operations, and an energy conversion element for controlling at least one recording characteristic of the magnetic head in response to the at least one detected recording condition. According to another embodiment, a method includes writing data to a magnetic medium using a magnetic head, detecting at least one recording condition of drive current provided to the magnetic head during the writing, and controlling at least one recording characteristic of the magnetic head during the writing using an energy conversion element in response to the at least one detected recording condition.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: March 17, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Akira Morinaga, Nobumasa Nishiyama, Keiichi Nagasaka
  • Patent number: 8982500
    Abstract: A control device for controlling tape transport within a tape transport system is disclosed. The control device includes a determination unit, which includes at least a first servo channel and a second servo channel for determining a first lateral position of a tape relative to the head, and for determining a difference between the first and second lateral positions. A computing unit computes a number of unsupported wraps of the tape as a function of the lateral position difference, wherein the number of unsupported wraps corresponds to the number of layers of the tape around the take-up reel having air layers in-between, and computes a spring constant of the tape as a function of the number of unsupported wraps, a radius of the take-up reel and a nominal tape path length. A calibration unit calibrates at least one unit of the tape transport system dependent on the spring constant.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: March 17, 2015
    Assignee: International Business Machines Corporation
    Inventors: Giovanni Cherubini, Jens Jelitto, Angeliki Pantazi
  • Publication number: 20150070798
    Abstract: A spindle motor is configured to rotate a disk in a case defined by a base plate and a top cover arranged to cover an upper side of the base plate. The spindle motor includes a fluid dynamic bearing including a lubricant oil. A rotating portion body of the spindle motor includes an air hole. An upper opening of the air hole is in communication with an annular space between the top cover and the rotating portion body. A lower opening of the air hole is in communication with a gap between a stator and a magnet. Accordingly, even if a gas including the lubricant oil vaporized through a liquid surface of the lubricant oil leaks into the annular space, at least a portion of the gas including the lubricant oil flows into the air hole.
    Type: Application
    Filed: August 14, 2014
    Publication date: March 12, 2015
    Inventors: Masahiro SHIRAISHI, Tsuchitsugu WATANABE, Yoichi SEKII
  • Patent number: 8964327
    Abstract: A tape drive receives multiple write requests for data pieces and a synchronization request corresponding to the write requests from a device, performs a synchronization process, and returns a completion status of the synchronization request. The tape drive includes a write controller that stores data pieces transferred from the device in the buffer, according to a first write request, receives a first synchronization request and then a subsequent write request for at least one data piece, and returns the completion status when processing for the first synchronization request is completed and the subsequent write request is received with a command queuing function.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: February 24, 2015
    Assignee: International Business Machines Corporation
    Inventors: Atsushi Abe, Katsuhiko Hagiwara
  • Publication number: 20150043101
    Abstract: A product, according to one embodiment, includes a magnetic recording tape having opposite ends, a longitudinal axis of the magnetic recording tape being defined between the ends. The magnetic recording tape has at least one servo track, the at least one servo track having a plurality of first magnetic bars and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars. The first magnetic bars each have a longitudinal axis oriented at a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape. The third magnetic bars each have a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 12, 2015
    Applicant: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Mark A. Lantz
  • Patent number: 8941940
    Abstract: Described herein are embodiments for utilizing stored write environment conditions for read error recovery. A tape drive measures read environment conditions as a result of receiving a read command to read data from a portion of tape and compares the read environment conditions to the write environment conditions stored for that portion of tape. If the read environment conditions are not within the predetermined range of the write environment conditions, then the handling of the tape is altered to improve read element placement on the tape by accounting for expansion and contraction of the tape based on the stored write environment conditions. The handling of the tape is altered by at least one of increasing or decreasing the tension of the tape, offsetting the tape head up or down laterally with respect to the tape, and slowing down the movement of tape across the tape head.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: January 27, 2015
    Assignee: International Business Machines Corporation
    Inventors: Josephine F. Bayang, Ernest S. Gale, Hirokazu Nakayama, Mitsuhiro Nishida
  • Patent number: 8922936
    Abstract: An object of the present invention is to further improve a recording density in a magnetic disk apparatus using a shingle write system. In a magnetic disk apparatus including a magnetic disk, a recording head that writes information on the magnetic disk, and a controller that controls a writing operation of the recording head to the magnetic disk, the controller controls the writing operation such that the recording head writes information on a region including a target track and a portion of track adjacent thereto in an overlapping manner while position-shifting in a radial direction of the magnetic disk and a first writing frequency to a track on which information is last written is higher than a second writing frequency to another track.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: December 30, 2014
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventors: Iwao Okamoto, Chiyo Saito, Daisuke Masuda
  • Patent number: 8917471
    Abstract: A data storage device (DSD) enters a high spindle suppression (HSS) mode to reduce instances of rotation of a spindle motor of the DSD during the HSS mode. When a read command is received from a host to read requested data from the DSD in the HSS mode, it is determined whether the requested data is not stored in a solid state memory of the DSD. If it is determined that the requested data is not stored in the solid state memory, the spindle motor is controlled to rotate a disk of the DSD. The requested data is read from the disk and stored in the solid state memory before completing transfer of the requested data to the host.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: December 23, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventors: Zaihas Amri Fahdzan Hasfar, Choo-Bhin Ong, Jonathan K. Cheng
  • Patent number: 8908313
    Abstract: A transport system for transporting magnetic tape includes at least one roller for guiding the magnetic tape having at least one electrode and a controller being configured to apply a voltage to the at least one electrode so as to produce a force of attraction between the magnetic tape and the at least one electrode.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: December 9, 2014
    Assignee: International Business Machines Corporation
    Inventors: Johan B. C. Engelen, Simeon Furrer, Mark A. Lantz
  • Patent number: 8896958
    Abstract: A tape drive is disclosed. The tape drive determines a current tape width and writes data to the tape as well as the current tape width. The tape width written to the tape is associated with the data. When reading data from a tape the tape drive reads the stored tape width and adjusts the current tape width to match the stored tape width before reading the data associated with the stored tape width.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: November 25, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J Fasen, Jeffrey S McAllister
  • Publication number: 20140334030
    Abstract: According to one embodiment, a recording head includes a main pole, a trailing shield including a first connecting portion and a second connecting portion, and configured to form together with the main pole a first magnetic core, a leading shield including a first connecting portion connected to the main pole through a magnetic material and an end portion opposing to the end portion of the main pole through a non-magnetic material, and configured to form together with the main pole a second magnetic core, and first and second coils wound around the first and second magnetic cores, and a connection terminal configured to flow a current through the main pole, non-magnetic conductive layer, and trailing shield.
    Type: Application
    Filed: July 25, 2014
    Publication date: November 13, 2014
    Inventors: Tomoko TAGUCHI, Yusuke TOMODA
  • Publication number: 20140327984
    Abstract: An apparatus according to one embodiment includes a magnetic head, the magnetic head having: a tape bearing surface having a first edge oriented perpendicular to an intended direction of tape travel thereacross; and an array of transducers in and/or adjacent the tape bearing surface, wherein a longitudinal axis of the array is defined between opposite ends thereof, wherein the longitudinal axis of the array of transducers is oriented at an angle relative to the first edge, the angle being between greater than 0.2° and about 10°.
    Type: Application
    Filed: May 1, 2013
    Publication date: November 6, 2014
    Applicant: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Publication number: 20140327985
    Abstract: Provided are a method, system, and program for adjusting tension in a tape media to counter tape dimensional stability (TDS) errors in a tape media. A determination is made of whether to adjust tension of the tape media based on a detected error rate of reading at least one of the tracks. The tension of the tape media is adjusted in response to determining to adjust the tension.
    Type: Application
    Filed: May 3, 2013
    Publication date: November 6, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: INTERNATIONAL BUSINESS MACHINES CORPORATION
  • Patent number: 8879180
    Abstract: Storing data in a hard disk drive may include determining a percentage of storage usage (SU %) of the data tracks. If the SU % is less than a first threshold percentage (TP1), the method may include storing data to Nth data tracks. If the SU % is greater than or equal to TP1, but less than a second threshold percentage (TP2), the method may include storing data to about N/2 data tracks between said Nth data tracks. If the SU % is greater than or equal to TP2, the method may include storing data to data tracks between said N/2 data tracks and said Nth data tracks.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: November 4, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Hiroshi Deki, Takayuki Kinoshita
  • Patent number: 8867161
    Abstract: Apparatus and method for writing data to a data storage medium using shingled magnetic recording (SMR). In accordance with some embodiments, a transducer is positioned adjacent a recording medium. The transducer is used to write data to the medium in the form of partially overlapping tracks grouped together into bands so that a first track and a last track in a selected band are wider than remaining tracks in the selected band.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 21, 2014
    Assignee: Seagate Technology LLC
    Inventors: Bruce Emo, Ken R. Burns
  • Publication number: 20140307346
    Abstract: In one embodiment, a method includes making a determination whether to modify a cleaning cycle, e.g., of a tape drive, based at least in part on at least one of: an age of one or more tapes, a type of one or more tapes, and an identity of a vendor of one or more tapes. A selection and/or modification of a timing of a cleaning operation is made based on the determination.
    Type: Application
    Filed: June 26, 2014
    Publication date: October 16, 2014
    Inventors: Ernest S. Gale, Khanh V. Ngo, Charles V. Polkiewicz
  • Patent number: 8861121
    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: October 14, 2014
    Assignee: Oracle International Corporation
    Inventor: Daniel W. Underkofler
  • Publication number: 20140300987
    Abstract: A motor drive device has a spindle motor driver adapted to drive a spindle motor. the spindle motor driver includes lower side NMOSFETs, one for each phase, which connect and disconnect terminals, one for each phase, of the spindle motor to and from a ground terminal; a controller adapted to generate a switch control signal and a brake control signal; lower side pre-drivers, one for each phase, connected between an application terminal of an internal power supply voltage and the ground terminal and adapted to generate lower side gate signals, one for each phase, in accordance with the switch control signal to output the lower side gate signals to the lower side NMOSFETs, one for each phase; and a brake unit adapted to pull up to the internal power supply voltage all the lower side gate signals, one for each phase, in accordance with the brake control signal.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 9, 2014
    Applicant: ROHM CO., LTD.
    Inventor: ROHM CO., LTD.
  • Patent number: 8848310
    Abstract: A memory system includes a storage medium having tracks arranged on the storage medium. The tracks include data track portions configured to store data. The tracks have a data track width and offset correction portions having a width that is greater than the data track width of the associated data track. Each offset correction portion stores one or both of positional offset correction values and timing offset correction values. The positional offset correction values are configured to correct for errors that occur in cross track positioning relative to the medium and the timing offset correction values are configured to correct for errors that occur in down track timing relative to the medium.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: September 30, 2014
    Assignee: Seagate Technology LLC
    Inventor: Bruce Douglas Buch