Patents by Inventor Tsuyoshi Miyamura

Tsuyoshi Miyamura 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: 20190189155
    Abstract: A computer-implemented method for determining a damaged area of a magnetic tape loaded in a tape drive, according to one embodiment, includes: determining a first error location on a magnetic tape where a first error occurred in response to experiencing the first error. Moreover, the method includes determining one or more areas on the magnetic tape to be examined. The one or more areas are determined using a predetermined algorithm which incorporates the first error location. Independent of a read and/or write operation, relative motion is induced between a tape head and the magnetic tape such that the tape head is positioned adjacent to each of the respective one or more areas in turn. Furthermore, each of the one or more areas having a respective number of measured servo errors which exceeds a threshold value is identified as a damaged area of the magnetic tape.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 20, 2019
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma
  • Patent number: 10276204
    Abstract: A tape drive-implemented method, according to one embodiment, includes: detecting a read error, determining whether a current tension setting of the magnetic tape is accurate, determining whether the read error is part of an error burst in response to determining that the current tension setting of the magnetic tape is accurate, sending instructions to perform a first re-read attempt in response to determining that the read error is not part of an error burst, determining whether the first re-read attempt was performed successfully, selecting a range of tension settings in response to determining that the first re-read attempt was not performed successfully, selecting a range of lateral offsets, sending instructions to apply each unique combination of tension settings and lateral offsets, for each of the unique combinations applied, sending instructions to perform a second phase re-read attempt, and determining whether the second phase re-read attempt was performed successfully.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: April 30, 2019
    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: 10269378
    Abstract: A magnetic tape head module read element array includes servo readers and read elements configured in accordance with a tape standard. Each read element includes a plurality of read sensors. A microprocessor receives the generation of the tape technology standard and identifies, based on the generation, a combination of read sensors in each read element. Data signals from each read sensor in each combination are buffered. The microprocessor performs error detection and error correction operations on the buffered signal data for each combination of read sensors to generate verified track data in accordance with the generation of tape.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 23, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tsuyoshi Miyamura, Eiji Ogura, Tomoko Taketomi
  • Patent number: 10261866
    Abstract: Restoring a data processing system. Files on one or more storage devices of a data processing system are backed up to magnetic tape recording media. Metadata associated with the backed up files is recorded, including magnetic tape identification and tape location for each backed up file. Files on the one or more storage devices are identified that meet a selection policy for files required for rapid restoration of the data processing system. An index list is generated of the identified files and their associated magnetic tape metadata. The index list is sorted by magnetic tape identification and magnetic tape location. In response to a request to restore the data processing system, the identified files on the sorted index list are restored in magnetic tape identification and magnetic tape location sort order. Operation of the restored data processing system is then begun in accordance with the restored files.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: April 16, 2019
    Assignee: International Business Machines Corporation
    Inventors: Norie Iwasaki, Sosuke Matsui, Tsuyoshi Miyamura, Terue Watanabe, Noriko Yamamoto
  • Patent number: 10248335
    Abstract: A method, a computer program product, and a computer system for backing up data in a backup storage space. A computer receives a request for backing up a second data file, wherein the second data file is created from a first data file. The computer determines whether a third data file satisfies one or more of predetermined conditions for backup; wherein the third data file is generated when the second data file is created from the first data file and the third data file comprises information for creating the second data file from the first data file. In response to determining that the third data file satisfies the one or more of the predetermined conditions for backup, the computer backs up the third data file, without backing up the second data file.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: April 2, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10248352
    Abstract: There is disclosed a method performed by a computer system for managing a location of an object in a hierarchical storage that includes a plurality of storage layers. In the method, the computer system receives a selection of one storage layer for storing a selected object from among the plurality of the storage layers via a network connected to the computer system. The computer system also moves the selected object to the one storage layer from other storage layer currently that stores the selected object among the plurality of the storage layers. The computer system further excludes the selected object from targets of a predetermined space management that is being applied to objects in the hierarchical storage.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: April 2, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10242709
    Abstract: A computer-implemented method, according to one embodiment, includes: detecting a first error while accessing a magnetic tape, determining a first error location on the magnetic tape where the first error occurred, determining one or more areas on the magnetic tape to be examined, independent of a read and/or write operation, inducing 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, using the tape head to measure a number of servo errors that occur in each of the respective one or more areas, and identifying each of the one or more areas having a respective number of measured servo errors which exceeds a threshold value as a damaged area of the magnetic tape. The one or more areas are determined using a predetermined algorithm which incorporates the first error location.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: March 26, 2019
    Assignee: International Business Machines Corporation
    Inventors: Noriko Yamamoto, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma
  • Patent number: 10242707
    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: Grant
    Filed: June 13, 2018
    Date of Patent: March 26, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Sosuke Matsui, Shinsuke Mitsuma, Noriko Yamamoto
  • Patent number: 10241703
    Abstract: A multivolume management method, executed by a computer, includes storing a dataset over a plurality of media storage devices, wherein the plurality of media storage devices has a corresponding plurality of physical identifiers, generating a conversion table that assigns the plurality of physical identifiers to a corresponding plurality of sequentially ordered virtual identifiers, wherein each physical identifier is uniquely assigned to one virtual identifier, receiving a request for the dataset, wherein the request references the plurality of sequentially ordered virtual identifiers, in response to receiving the request, generating a response comprising an ordered list of physical identifiers using the conversion table, and responding to the request with the response. A computer system and computer program product corresponding to the above method are also disclosed herein.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: March 26, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Hiroki Nishiyama, Terue Watanabe
  • Patent number: 10229718
    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: June 5, 2018
    Date of Patent: March 12, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Publication number: 20190073144
    Abstract: In one aspect of the present invention, an apparatus includes a head configured to write data to a tape, and a hardware controller coupled to the head. The controller is configured to cause the apparatus to copy a second data area on the tape as a third data area, the second data area corresponding to data in a first data area that has changed. The controller is also configured to cause the apparatus to store, on the tape, index information for identifying the third data area, and copy the first data area to the tape as a fourth data area separate from the third data area. The controller is also configured to cause the apparatus to store, on the tape, index information for identifying the fourth data area.
    Type: Application
    Filed: November 1, 2018
    Publication date: March 7, 2019
    Inventor: Tsuyoshi Miyamura
  • Patent number: 10223038
    Abstract: A memory that includes a data partition and an index partition is mounted. The data partition includes an original data and an original index written directly after the original data. The index partition includes the original index at the beginning of the index partition. The first data is written to a data partition of the memory. The first data is written directly after the at least one data on the data partition and the original index is deleted and invalidated. Responsive to a time interval elapsing, a first index is written to the data partition of the memory directly after the first data. The time interval starts at the writing of the first data. Responsive to the time interval elapsing, the first index is written to the index partition of the memory at the closest location, in terms of movement time, to the first index on the data partition.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: March 5, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10169346
    Abstract: A method, executed by at least one processor, includes receiving a migration request for a plurality of files, assigning files of the plurality of files that are smaller than a selected size to one or more small-file secondary storage devices, assigning files of the plurality of files that are larger than the selected size to one or more large-file secondary storage devices, and initiating migration of the plurality of files from one or more primary storage devices to the secondary storage devices to which they are assigned. A corresponding computer program product and computer system are also disclosed herein.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10169165
    Abstract: Restoring a data processing system. Files on one or more storage devices of a data processing system are backed up to magnetic tape recording media. Metadata associated with the backed up files is recorded, including magnetic tape identification and tape location for each backed up file. Files on the one or more storage devices are identified that meet a selection policy for files required for rapid restoration of the data processing system. An index list is generated of the identified files and their associated magnetic tape metadata. The index list is sorted by magnetic tape identification and magnetic tape location. In response to a request to restore the data processing system, the identified files on the sorted index list are restored in magnetic tape identification and magnetic tape location sort order. Operation of the restored data processing system is then begun in accordance with the restored files.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventors: Norie Iwasaki, Sosuke Matsui, Tsuyoshi Miyamura, Terue Watanabe, Noriko Yamamoto
  • Patent number: 10152256
    Abstract: A method for backing up data on a tape is provided. This method includes: copying the first data area excluding the third data area, and the second data area, to the tape as a single, contiguous fourth data area. The second data area is copied to a position corresponding to the replacement of the third data area in the contiguous fourth data area. The third data area is copied to the tape as a fifth data area separate from the fourth data area. The index information for identifying the fourth data area, and the index information for identifying the fifth data area, are stored to the tape.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: December 11, 2018
    Assignee: International Business Machines Corporation
    Inventor: Tsuyoshi Miyamura
  • Patent number: 10152993
    Abstract: Linear Tape File System that can accommodate various storage orders, such as sequential and reverse sequential, on a tape medium. The storage order may be reversed (or otherwise changed) at the block level and also the bit order within the block level. The LFTS related data associated with the LFTS file system stores data sufficient to indicate storage order (for example, reverse), so that the motions of the tape medium and tape drive can be coordinated during reading or erasing operations to be performed in the correct order, with a view to the order the data was stored on the tape. Storing data in reverse order on an LFTS tape can lead to certain operational advantages.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: December 11, 2018
    Assignee: International Business Machines Corporation
    Inventors: Noriko Yamamoto, Tohru Hasegawa, Tsuyoshi Miyamura, Shinsuke Mitsuma, Sosuke Matsui, Hiroshi Itagaki
  • Patent number: 10133487
    Abstract: A mechanism is provided for providing information about fragmentation of a file on a sequential access medium by a computer system is disclosed. An actual time for reading the file recorded on the sequential access medium is estimated based on a physical position of the file. A total length of the file on the sequential access medium is calculated based on a physical length of each data piece constituting the file. An expected time for reading the file by assuming that the file is rewritten continuously is estimated based on the total length of the file. Information about the fragmentation of the file is then provided based on the actual time and the expected time.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: November 20, 2018
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10120612
    Abstract: An apparatus, method, system, and program product are disclosed for tape copying. One method includes mounting a first source tape of multiple source tapes on a source tape drive. The method includes mounting a destination tape on a destination tape drive. The method also includes copying a first index of an index partition of the first source tape to a first copied index of an index partition of the destination tape. The method includes storing first position information corresponding to the first copied index on the destination tape. The method also includes copying first data of a data partition of the first source tape to a first copied data of a data partition of the destination tape. The method includes storing second position information corresponding to the first copied data on the destination tape.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: November 6, 2018
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto
  • Patent number: 10083180
    Abstract: A backup method is provided for a file system for managing hierarchical storage including one or more storage media on a computer system including one or more computers. Each of the one or more storage media includes a data part which is separated from an index and on which updated information is appended and kept. Each of a plurality of pieces of data within the file system is managed to be migrated to at least any of the one or more storage media. The backup method includes backing up metadata of the plurality of pieces of data migrated within the file system; and backing up the index of each of the one or more storage media to which the plurality of pieces of data have been migrated, substantially at the same time point as the metadata.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: September 25, 2018
    Assignee: International Business Machines Corporation
    Inventors: Norie Iwasaki, Sosuke Matsui, Tsuyoshi Miyamura, Terue Watanabe, Noriko Yamamoto
  • Patent number: 10073632
    Abstract: The time required for recalling the file is reduced when the file is written in a mounted plurality of tapes in comparison to recalling the file when written in a non-mounted plurality of tapes. In the non-mounted state, criteria does not typically exist in order to recall the written file within the plurality of tapes. Embodiments of the present invention provide systems and methods for recalling files based on criteria which considers: the mounted state of a tape; the type of tape; the type of available tape drive; the number of files included in a tape; and the location of the written file in a tape.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 11, 2018
    Assignee: International Business Machines Corporation
    Inventors: Tohru Hasegawa, Hiroshi Itagaki, Sosuke Matsui, Shinsuke Mitsuma, Tsuyoshi Miyamura, Noriko Yamamoto