Patents by Inventor Tsuyoshi Hasegawa

Tsuyoshi Hasegawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200159433
    Abstract: A linear tape file system (LTFS) maintains a series of indexes, and an incremental change dataset, that records incremental changes that have taken place in each new index over the previous one, as each new index of the series is created. Upon receiving a command to roll back the file system from a current generation to a target previous generation, a generation control module applies information in the incremental change dataset to the current index. In this way, the current index is restored, at least functionally, to the state it was in when the target generation was created, thereby effectuating the rollback of the file system to the target generation.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Inventors: Tsuyoshi Miyamura, Tohru Hasegawa, Hiroshi ltagaki, Noriko Yamamoto, Shinsuke Mitsuma
  • Publication number: 20200142971
    Abstract: A method includes setting a maximum total size of data saved in a snapshot area, creating a snapshot of a file system, including reference to a plurality of logical volumes, saving at least a part of the plurality of logical volumes in the snapshot area on condition that it does not exceed the maximum total size of data saved in the snapshot area, and executing copy-on-write processing in response to a writing request for data in the file system, the data not being saved in the snapshot area.
    Type: Application
    Filed: November 2, 2018
    Publication date: May 7, 2020
    Inventors: Sosuke Matsui, Tohru Hasegawa, Noriko Yamamoto, Shinsuke Mitsuma, Hiroshi Itagaki, Tsuyoshi Miyamura
  • Patent number: 10642784
    Abstract: A method to identify data elements conforming to a policy includes receiving a request to identify data elements in an input set of data elements that conform to one or more requested policies. According to the method, policy output information describing data elements that conform to a requested policy are saved in association with the requested policy. In response to receiving a subsequent request to identify data elements in a subsequent set of data elements that conform to the requested policy, the method includes outputting the saved policy output information based on the policy output information having been saved in association with the requested policy. A computer program product and a system, configured with processors and a memory that can store saved policy information, can implement the method.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: May 5, 2020
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10638598
    Abstract: The present invention aims to provide a ground member that can be mounted on any position, wherein misalignment is less likely to occur between conductive filler particles of the ground member and a shielding layer of a shielding film when a shielded printed wiring board including the ground member is repeatedly heated and cooled to mount components thereon. The ground member of the present invention includes: a conductive external connection member having a first main surface and a second main surface opposite to the first main surface; conductive filler particles disposed adjacent to the first main surface; and an adhesive resin for fixing the conductive filler particles to the first main surface, wherein each conductive filler particle includes a low-melting-point metal.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: April 28, 2020
    Assignee: TATSUTA ELECTRIC WIRE & CABLE CO., LTD.
    Inventors: Yuusuke Haruna, Takahiko Katsuki, Tsuyoshi Hasegawa, Hiroshi Tajima
  • Patent number: 10620865
    Abstract: The direction of a WRAP and the logical points on which a file are written influence the efficiency of a recall of the file. Embodiments of the present invention provide methods and systems which can be applied to an upper storage layer and a lower storage layer in a hierarchical storage system. In turn, the migration and recall of a plurality of files, which contain data, are more rapid and efficient by preferring one logical point over another logical point.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: April 14, 2020
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Sosuke Matsui, Noriko Yamamoto
  • Patent number: 10614851
    Abstract: A method, computer system, and a computer program product for verifying data written to a tape is provided. The present invention may include preparing a first group of data to be written to the tape; signaling a tape drive to perform a write operation to write the first group of data to the tape; receiving from the tape drive a tape head location signal, wherein the tape head location signal indicates that the tape drive has detected that the tape movement during the write operation has reached a turnaround point; performing a read operation to read the first group of data from the tape; receiving from the tape drive a second group of data read by the tape drive during the read operation; and comparing the first group of data to the second group of data.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: April 7, 2020
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Noriko Yamamoto, Tohru Hasegawa
  • Patent number: 10579294
    Abstract: According to one embodiment there is provided a method for managing a location of an object in a storage system having hierarchical storage with a plurality of storage layers. The method includes transmitting a get-list request for viewing contents of a designated directory on the hierarchical storage. The method also includes receiving a response to the get-list request, the response including a list of objects in the designated directory and listing each storage layer corresponding to the objects. The list is output, and a select request to select a different storage layer for one of the objects is received. The select request is transmitted to the storage system for invoking migration of the selected object to the different storage layer. A second response is received from the storage system indicating the selected object is stored in the different storage layer, and an updated list is output.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: March 3, 2020
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Publication number: 20200065022
    Abstract: A computer-implemented method for managing a first storage library and a second storage library, according to one embodiment, includes associating a first physical tape and a second physical tape with a logical tape. The associating includes writing a first identifier to an index of the logical tape. The first identifier represents the first physical tape and the first storage library. The associating further includes writing a second identifier to the index of the logical tape. The second identifier represents the second physical tape and the second storage library. The computer-implemented method further includes storing the index of the logical tape in memory, and displaying the logical tape by reading the index from memory as a file system.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 27, 2020
    Inventors: Hiroshi Itagaki, Tohru Hasegawa, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto, Sosuke Matsui
  • Publication number: 20200051592
    Abstract: A computer-implemented method, according to one embodiment, includes: receiving, from a tape drive, a first error location on a magnetic tape where a first error occurred, in addition to determining one or more areas on the magnetic tape to be examined based on the first error location. Independent of a read and/or write operation, the tape drive is instructed to induce relative motion between a tape head and the magnetic tape such that the tape head is positioned adjacent to each of the respective one or more areas in turn. Moreover, each of the one or more areas having a respective number of measured servo errors which exceeds a threshold value is identified as a damaged area of the magnetic tape.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma
  • Publication number: 20200051591
    Abstract: A computer program product, according to one embodiment, includes a computer readable storage medium having program instructions embodied therewith. The program instructions are readable and/or executable by a processor to cause the processor to: determine, by the processor, a first error location on a magnetic tape where a first error occurred. One or more areas on the magnetic tape to be examined are also determined, by the processor, based on the first error location. Independent of a read and/or write operation, relative motion between a tape head and the magnetic tape is induced by the processor, such that the tape head is positioned adjacent to each of the one or more areas in turn. Moreover, each of the one or more areas having a respective number of measured servo errors which exceeds a threshold value are identified, by the processor, as a damaged area of the magnetic tape.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma
  • Publication number: 20200042185
    Abstract: A computer-implemented method, according to one embodiment, includes: estimating, by the computer system, a waiting time for copy target data to be transferred from the source medium. The waiting time includes an estimated time for locating and reading the copy target data from the source medium. The method also includes selecting, by the computer system, migration target data on the source medium based on whether migration of data to the target medium is expected to be finished within the waiting time. The selecting is based at least in part on comparing a size of the data and an allowable size calculated based on the waiting time and an estimated write transfer rate to the target medium. The method further includes migrating, by the computer system, the migration target data from the source medium to the target medium.
    Type: Application
    Filed: October 10, 2019
    Publication date: February 6, 2020
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Publication number: 20200042607
    Abstract: A computer-implemented method for performing a storage reclaim on a storage device includes generating a second tape image on a first storage device. The computer-implemented method further includes copying metadata associated with a first data extent of a valid file from a first index partition of a first tape image to a second index partition of the second tape image. The computer-implemented method further includes copying file data associated with the first data extent from a first data partition of the first tape image to a second data partition of the second tape image. The computer-implemented method further includes adjusting metadata associated with the file data of the first data extent copied to the second data partition of the second tape image. The computer-implemented method further includes releasing a storage area corresponding to the first data extent of the valid file included in the first tape image.
    Type: Application
    Filed: July 31, 2018
    Publication date: February 6, 2020
    Inventors: SHINSUKE MITSUMA, TSUYOSHI MIYAMURA, HIROSHI ITAGAKI, TOHRU HASEGAWA, NORIKO YAMAMOTO, SOSUKE MATSUI
  • Publication number: 20200042229
    Abstract: Method, computer program product, and system embodiments of the present disclosure may include a computing device which may set a predetermined flag on data to be copied from a primary storage tier and a secondary storage tier. The computing device may identify a first portion of the flagged data as being in a pre-migrated state stored on the primary storage tier and migrate the flagged pre-migrated data from the primary storage tier to a target medium. The computing device may identify a second portion of the flagged data as being in a migrated state stored on the secondary storage tier. The computing device may recall the flagged migrated data from the secondary storage tier to the primary storage tier and migrate the recalled migrated data from the primary storage tier to the target medium.
    Type: Application
    Filed: September 19, 2019
    Publication date: February 6, 2020
    Inventors: Tsuyoshi Miyamura, Sosuke Matsui, Tohru Hasegawa, Hiroshi Itakagi, Noriko Yamamoto, Shinsuke Mitsuma
  • Patent number: 10545698
    Abstract: A computer-implemented method for copying data from a source medium to a target medium in a storage system by a computer system, the storage system including a storage device, a first drive configured to access the source medium, and a second drive configured to access the target medium, the method comprising: estimating a waiting time for copy target data to be transferred from the source medium, selecting migration target data of the storage device based on whether migration of data to the target medium is expected to be finished within the waiting time or not, migrating the migration target data from the storage device to the target medium by the second drive while locating and/or reading the copy target data on the source medium by the first drive, and writing the copy target data to the target medium by the second drive.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 28, 2020
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10541004
    Abstract: A system accesses metadata on a file system of the magnetic tape, where the metadata comprising one or more fields enabling to determine a longitudinal position (LPOS) of one or more files located on the magnetic tape. The system determines the LPOS of the one or more files located on the magnetic tape. The system determines an optimal location of the head on the magnetic tape based on computing an average value to the determined LPOS of the one or more files located on the magnetic tape and moves the head on the magnetic tape to the optimal location.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: January 21, 2020
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10528271
    Abstract: A tape library storage system, keeps track of the identity(ies) of the drive unit(s) that write upon the storage medium of each tape cartridge, and associates the drive unit identity information with the data that each drive writes. The system writes the associated identity information in the tape cartridge memory and/or inserts the information in an index and writes the index on the tape. If a read error occurs when attempting to read data from the tape, the system, by reference to the associated identity information, determines the identity of the original tape drive that had written the data, and transfers the cartridge to the original drive to attempt again to read the data.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: January 7, 2020
    Assignee: International Business Machines Coporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Shinsuke Mitsuma, Tsuyoshi Miyamura, Sosuke Matsui, Noriko Yamamoto
  • Publication number: 20190391743
    Abstract: The method, computer program product, and computer system may include a computing device which may generate a list of data to be copied from a plurality of source media to a target medium. The computing device may identify a first type of data in the generated list of data with the first type of data being pre-migrated data. The computing device may reclaim the first type of data from a primary storage tier to the target medium with the target medium being associated with the first drive. The computing device may identify a second type of data in the generated list of data, the second type of data being migrated data, and reclaim the second type of data from at least one secondary source medium to the target medium using the first drive and a second drive. The secondary source medium may be associated with the second drive.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 26, 2019
    Inventors: SOSUKE MATSUI, Tohru Hasegawa, Tsuyoshi Miyamura, NORIKO YAMAMOTO, Shinsuke Mitsuma, HIROSHI ITAGAKI
  • Patent number: 10515775
    Abstract: An electron tube includes a housing having an internal space airtightly sealed, and an electrode configured to generation or detection of energy by electron emission in the internal space. The housing has a main body part made of an insulating material and formed with a recess constituting the internal space, and a lid part fixed to the main body part so as to close an opening of the recess. The recess expands toward the opening side. The main body part is fixed with a penetrating member that is electrically connected to the electrode and passes through the main body part. The penetrating member has an internal space projecting part that projects from a bottom surface of the recess into the internal space.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: December 24, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Tsuyoshi Kodama, Yasuyuki Kohno, Shinichi Hara, Hideki Shimoi, Hiroyuki Kageyama, Yusuke Hasegawa, Ryota Kakei
  • Publication number: 20190385641
    Abstract: Aspects of the present disclosure relate to a method for timing index write to a tape medium of a tape system. Index write timing data that specifies index write timing based on file metadata attributes is stored. Metadata attributes of a first file are analyzed to determine whether a first index should be written at a first time based on the index write timing data. In response to determining that an index should be written, the first index is written to the tape medium at the first time.
    Type: Application
    Filed: January 29, 2019
    Publication date: December 19, 2019
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Sosuke Matsui, Shinsuke Mitsuma, Noriko Yamamoto
  • Publication number: 20190373716
    Abstract: The present invention aims to provide a printed wiring board in which an increase in electrical resistance between a ground circuit and a reinforcement member of the printed wiring board is inhibited.
    Type: Application
    Filed: February 9, 2018
    Publication date: December 5, 2019
    Inventors: Yuusuke HARUNA, Takahiko KATSUKI, Tsuyoshi HASEGAWA, Hiroshi TAJIMA