Patents Assigned to Toshiba Storage Device Corporation
  • STORAGE DEVICE
    Publication number: 20100246059
    Abstract: According to an embodiment, a storage device includes a housing configured to contain a magnetic disk storage medium, a drive section configured to rotate the storage medium to store information into the storage medium, an air passage which is defined along an outer peripheral edge of the storage medium between the outer peripheral edge and a wall portion of the housing which faces the outer peripheral edge, receives air produced as the storage medium rotates, and discharges the received air toward an outer peripheral surface of the storage medium, a filter for dust collection in the air passage, and a spoiler located close to at least an air exhaust side of the air passage and extending from the outer peripheral edge side of the storage medium to a region above a recording surface of the storage medium.
    Type: Application
    Filed: March 31, 2010
    Publication date: September 30, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Keishi SHIMIZU
  • MAGNETIC HEAD AND INFORMATION STORAGE DEVICE
    Publication number: 20100246047
    Abstract: According to one embodiment, a magnetic head includes a magnetic pole layer including a magnetic pole extending along a layer, a coil layer configured to adjoin the magnetic pole layer and including a plurality of conductor patterns constituting a part of a coil wound around the magnetic pole and a resin which fills up a gap between the conductor patterns, a heater layer configured to adjoin the coil layer and including a heater extending in the heater layer via an area along a coil-forming region in which the conductor patterns in the coil layer are formed and an area along a no-coil region off the coil-forming region, and a transition-reluctant portion in that part of the no-coil region which adjoins the heater and having a glass transition temperature higher than that of the resin or not having any glass transition temperature.
    Type: Application
    Filed: March 30, 2010
    Publication date: September 30, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Kenichiro AOKI
  • HEAD SUSPENSION ASSEMBLY AND MAGNETIC DISK DRIVE
    Publication number: 20100246071
    Abstract: According to one embodiment, a head suspension assembly includes a load beam supporting a head, and a microactuator configured to swing the load beam. The microactuator includes two piezoelectric elements configured to undergo shear deformation when supplied with a voltage and juxtaposed in such a manner that respective shear deformations thereof are opposite in direction, a first electrode and a second electrode arranged so as to hold the piezoelectric elements therebetween, and a support plate joined to the first electrode with an insulating layer therebetween and joined to the load beam to support the load beam.
    Type: Application
    Filed: March 31, 2010
    Publication date: September 30, 2010
    Applicant: Toshiba Storage Device Corporation
    Inventors: Yusuke NOJIMA, Shinji KOGANEZAWA
  • CONTROL DEVICE, STORAGE DEVICE, DATA LEAKAGE PREVENTING METHOD
    Publication number: 20100241870
    Abstract: According to one embodiment, a control device controls a storage device configured to encrypt data based on an encryption key, store the data in a storage region, and decrypt the data stored in the storage region based on the encryption key. The control device includes an information generator and an encryption key generator. The information generator generates information as change information when the storage device is turned on. The change information is different from information used when the storage device is last turned on. The encryption key generator generates an encryption key based on the change information generated by the information generator.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Tatsunori ITO, Kazuo NAKASHIMA, Nobuhiko ISATO, Toshiyuki HAYAKAWA
  • ERROR CORRECTION CIRCUIT AND DATA STORAGE DEVICE
    Publication number: 20100241922
    Abstract: According to one embodiment, a circuit includes: an ECC encoder to assign symbols of a data string to M interleaves in sequence, create redundancy symbols for each interleaved string, insert the redundancy symbol into the data string every N symbols of the data string, and create ECC encoded data, where M and N are greater than or equal to 2; and an ECC decoder to assign the symbols of the data string that has been inserted with the redundancy symbols to M interleaves and apply error correction to each assigned string, using the redundancy symbols of that assigned string. The encoder assigns each symbol of the data string that corresponds to an insertion position of the different one of the redundancy symbols in the data string to a next position next to and skipping an in-sequence interleaving position of that symbol, and creates the redundancy symbols for each interleaved string.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Kana FURUHASHI, Akihiro YAMAZAKI
  • MAGNETIC DISK DEVICE AND METADATA MANAGEMENT SYSTEM
    Publication number: 20100241643
    Abstract: According to one embodiment, a magnetic disk device includes: a recording medium configured to record a plurality of metadata items for each of search data items, the metadata items being related to information of the search data items; a management module configured to manage, for each of the metadata items, logical addresses specifying the metadata items recorded in the recording medium; and a reader configured to read the metadata items from the recording medium by using the logical addresses managed by the management module.
    Type: Application
    Filed: March 17, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Seiji TODA
  • HEAD SUSPENSION ASSEMBLY AND STORAGE DEVICE
    Publication number: 20100238594
    Abstract: According to one embodiment, a head suspension assembly includes: a metal thin plate held by a head suspension; a fixed plate formed in the metal thin plate and joined to the head suspension; a supporting plate formed in the metal thin plate on the front side of the fixed plate and supporting a head slider on a surface thereof and held on a rear surface thereof by a protrusion formed on the head suspension; an arm formed in the metal thin plate and extending from the fixed plate to the supporting plate and allowing a change in a posture of the supporting plate; an insulating layer extending from the fixed plate to the supporting plate and supported by the arm; a wiring pattern formed on the insulating layer; and a visco-elastic body arranged on a flat surface formed on the arm, the insulating layer, or the wiring pattern.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Kenzo NAKAMURA, Shinji KOGANEZAWA, Takuma KIDO
  • HEAD SLIDER AND MAGNETIC STORAGE DEVICE
    Publication number: 20100238592
    Abstract: According to one embodiment, a head slider includes a magnetic head, a medium facing surface, a flow-in end surface, a flow-out end surface, side surfaces, and an absorbing structure. The magnetic head reads and writes information with respect to a magnetic recording medium. The medium facing surface faces the magnetic recording medium. From the flow-in end surface, an airflow generated by rotation of the magnetic recording medium flows in. To the flow-out end surface, the airflow is guided from the flow-in end surface through the medium facing surface. The side surfaces are located on both sides of the medium facing surface. The absorbing structure is provided to at least one of the flow-out end surface and the side surfaces. The absorbing structure absorbs flowing substances guided with the airflow.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 23, 2010
    Applicant: Toshiba Storage Device Corporation
    Inventor: Akiyo MIZUTANI
  • BEARING ASSEMBLY METHOD AND PRESSURIZATION JIG
    Publication number: 20100236070
    Abstract: According to one embodiment, a bearing assembly method for providing a bearing between a shaft and a rotator, comprises: embedding the bearing between the shaft and the rotator, and supplying a first adhesive between an inner ring of the bearing and the shaft and a second adhesive between an outer ring of the bearing and the rotator; partially pressing a plurality of points on an end surface of the inner ring before the first adhesive and the second adhesive are cured; and finishing pressing when the first adhesive and the second adhesive are cured.
    Type: Application
    Filed: May 13, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Kuniaki Toda
  • METHOD FOR GENERATING WRITE CLOCK SIGNAL IN MAGNETIC DISK DRIVE
    Publication number: 20100238578
    Abstract: According to one embodiment, a write clock generator writes data to bits in a magnetic recording medium based on a write clock signal with a phase obtained by delaying the phase of a reference write clock signal. The write clock generator detects the amplitude of a read signal for the written data. The write clock generator repeats these operations with a phase delay varied. The write clock generator decides an optimum phase delay based on the amplitude detected for each phase delay.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Hiroaki Ueno
  • MAGNETIC STORAGE DEVICE, METHOD FOR SETTING PROCESSING CONDITIONS FOR MAGNETIC STORAGE DEVICE, AND COMPUTER PROGRAM PRODUCT FOR SETTING PROCESSING CONDITIONS FOR MAGNETIC STORAGE DEVICE
    Publication number: 20100238579
    Abstract: According to one embodiment, a magnetic storage device, includes: a verification processing detector configured to detect whether there are a plurality of operation commands corresponding to a first verifying operation, based on a plurality of sets of individual information about the operation commands for the magnetic storage device from an external device, the sets of individual information including execution times and sets of accessed address information, the sets of individual information being stored in a first storage module as history information; and a processing condition setting module configured to set processing conditions for a second verifying operation to verify data stored in the first storage module, based on the sets of individual information corresponding to the first verifying operation, when the operation commands are detected.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Masaki SAITO
  • DISK DEVICE
    Publication number: 20100238583
    Abstract: According to one embodiment, a disk device rotates a disk information storage medium to record and reproduce information on the information storage medium by use of a head that slides in contact with a lubricant coated on the information storage medium, wherein a sliding speed U, area A and normal force N are set to cause U×A/N to fall within a monotonously increasing region in which a coefficient of friction associated with a frictional force occurring in a contact area of the head that faces the information storage medium monotonously increases as U×A/N increases, where the sliding speed U represents a sliding speed at a sliding time of the head, the area A represents the contact area of the head, and the normal force N represents a normal force applied to the contact area of the head.
    Type: Application
    Filed: April 29, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Yoshiaki IKAI, Takahiro IMAMURA, Yoshitaka SUZUKI
  • DISK APPARATUS WITH CONTACT-TYPE HEAD
    Publication number: 20100238582
    Abstract: According to one embodiment, a disk drive comprises a head and a heating actuator. The head is configured to slide over a rotating disk in contact with a surface of the disk. The heating actuator is configured to vary a state of contact between the head and the disk by being expanded by supplied heat. The head comprises the heating actuator.
    Type: Application
    Filed: May 11, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Yoshitaka SUZUKI, Takahiro IMAMURA, Yoshiaki IKAI
  • HEAD STACK ASSEMBLY INCORPORATING DEVICE, MAGNETIC DISK DEVICE MANUFACTURING DEVICE, AND METHOD OF MANUFACTURING MAGNETIC DISK DEVICE
    Publication number: 20100238593
    Abstract: According to one embodiment, a head stack assembly incorporating device connects a head stack assembly to the base of a magnetic disk device by screwing a connector on the bottom surface of the rotational shaft of the head stack assembly and a connector on the base of the magnetic device together. The head stack assembly incorporating device includes a chuck and a driving-force transmitter. The chuck pinches the rotational shaft of the head stack assembly from the upper surface of the head stack assembly to be fixed to the rotational shaft. The chuck is rotatable around the central axis of the rotational shaft. The driving-force transmitter transmits a rotational force to the chuck.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Ryousuke NAIDE, Takeshi KURUMIZAWA
  • METHOD AND APPARATUS FOR MEASURING PHASE SHIFT IN A DISK DRIVE HAVING BIT-PATTERNED MEDIA
    Publication number: 20100238577
    Abstract: According to one embodiment, a disk drive comprising a magnetic disk of bit-patterned type is provided. The disk drive has a reproduction module, a measurement module, and a recording module. The reproduction module outputs a reproduced signal corresponding to the phase-shift measuring bits provided on the magnetic disk. The measurement module determines that the phase shift corresponding to the phase-shift measuring bits is the phase shift of a write clock signal if the reproduced signal is determined to be indefinite on the basis of the quantization value of the reproduced signal. The recording module records data corresponding to the data recording bits, by using the write clock signal adjusted by the phase shift.
    Type: Application
    Filed: March 17, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Hiroshi Mutoh
  • ARRANGEMENT METHOD OF SERVO PATTERN OF PATTERNED MEDIUM, PATTERNED MEDIUM, AND INFORMATION STORAGE DEVICE
    Publication number: 20100238586
    Abstract: According to one embodiment, address information is expanded on a bit map in order to generate original address information which is divided in a direction of the abscissa to form groups. The demodulated values of the original address information are obtained as original intra-group demodulated values. New address information is obtained and an arrangement pattern of bits in the servo area determined based on the new address information on a bit map formed by integrating obtained new address information items of the groups.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Hiroyuki Suzuki
  • MAGNETIC BIT-PATTERNED DISK AND DISK DRIVE
    Publication number: 20100238576
    Abstract: According to one embodiment, a disk drive having a magnetic disk of the bit pattern media type is provided. The disk drive has a reproduction module configured to reproduce a signal from a measurement area provided on the magnetic disk and holding groups of phase-shift measuring bits, a measurement module configured to measure a phase shift that a write clock signal has with respect to data recording bits held in a data record area provided on the magnetic disk, when the signal reproduced by the reproduction module is indefinite, and a recording module configured to record data that corresponds to the data recording bits, by using the write clock signal adjusted by the phase shift.
    Type: Application
    Filed: March 17, 2010
    Publication date: September 23, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Hiroshi MUTOH
  • PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/PLAYBACK APPARATUS
    Publication number: 20100232071
    Abstract: According to one embodiment, a magnetic head includes a slider, a recording/reproduction element formed on a distal end face of the slider, and a resin film formed at least on the recording/reproduction element and the distal end face and having at least one of water repellency and oil repellency.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 16, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventors: Susumu OGATA, Hiroshi CHIBA, Masayuki TAKEDA
  • STORAGE DEVICE USING NON-VOLATILE MEMORY
    Publication number: 20100235568
    Abstract: According to one embodiment, a storage device includes a plurality of writable non-volatile memory devices, a buffer memory, a memory controller, and a spare non-volatile memory device. The buffer memory temporarily stores write data from a host. The memory controller writes the write data in the buffer memory to the non-volatile memory devices in a distributed manner. The memory controller writes write data in the buffer memory not having been written to the non-volatile memory devices to the spare non-volatile memory device when detecting a power down, and writes the write data having been written to the spare non-volatile memory device to the buffer memory when the power is restored.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 16, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Seiji INAMURA
  • DISK STORAGE DEVICE
    Publication number: 20100232048
    Abstract: According to one embodiment, a disk storage device includes: a controller configured to write data pieces stored in a buffer memory to a disk medium by a physical sector size which is an integer multiple of a unit logical block, wherein the controller is configured to detect at least one of the write data pieces stored in the buffer memory, the at least one of the write data pieces being to be written to a portion of a physical sector of the disk medium, configured to store the at least one of the write data pieces to the non-volatile memory, configured to store the rest of the write data pieces to the disk medium, and configured to write, upon non-detection of a command for a predetermined time period, the at least one of the write data pieces to the disk medium by the physical sector size through read-modify-write processing.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 16, 2010
    Applicant: TOSHIBA STORAGE DEVICE CORPORATION
    Inventor: Kimiyasu AIDA