Patents by Inventor Takahiro Shinbori
Takahiro Shinbori 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).
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Patent number: 10872040Abstract: According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong.Type: GrantFiled: February 6, 2020Date of Patent: December 22, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Takahiro Shinbori, Ryuta Kumagai
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Publication number: 20200174941Abstract: According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong.Type: ApplicationFiled: February 6, 2020Publication date: June 4, 2020Inventors: Takahiro Shinbori, Ryuta Kumagai
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Patent number: 10592423Abstract: According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong.Type: GrantFiled: September 10, 2018Date of Patent: March 17, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Takahiro Shinbori, Ryuta Kumagai
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Publication number: 20190286568Abstract: According to one embodiment, a magnetic disk device includes heads and a controller. The heads write data in a recording region of the magnetic disk. The controller divides in order, by a track group with a constant size, an entire region of the recording region where management regions indicating physical positions corresponding to the heads, respectively, creates the track groups so as to straddle the management regions at boundaries of the management regions, and controls writing of the data for each of the track groups. The controller assigns unique and logically consecutive numbers to the track groups and manages information on the management regions to which the track groups belong.Type: ApplicationFiled: September 10, 2018Publication date: September 19, 2019Inventors: Takahiro Shinbori, Ryuta Kumagai
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Patent number: 8416518Abstract: According to one embodiment, a magnetic disk includes a disk, a controller and an indicator module. The disk includes a plurality of data sectors. The controller is configured to control data rewrite for reading a first data block stored in the disk and writing a second data block corresponding to the read first data block to a write destination on the disk. The indicator module is configured to embed an indicator indicative of an attribute relating to data rewrite in each sector data in the second data block written to the write destination when the each sector data is written to the write destination.Type: GrantFiled: April 4, 2011Date of Patent: April 9, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Nitta, Hideaki Tanaka, Tatsuya Haga, Tadashi Hongawa, Takahiro Shinbori
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Patent number: 8411386Abstract: According to one embodiment, a data write control apparatus includes a magnetic disk, a write controller, and a retry controller. The magnetic disk includes a track in which data is recorded in sector unit. The write controller is configured to execute control to write a sector data block to a predetermined sector in the track. The retry controller is configured to execute control to retry a write process to a predetermined number of sectors to which data has been written and which include a first sector, and to manage the number of retries performed on each sector.Type: GrantFiled: May 13, 2011Date of Patent: April 2, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Tadashi Hongawa, Hideaki Tanaka, Tatsuo Nitta, Tatsuya Haga, Takahiro Shinbori
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Patent number: 8363349Abstract: According to one embodiment, a recording medium controller includes a recording medium, an input module, a reading module, and a writing module. The recording medium includes a write area and an escape area. The write area includes track groups. Each of the track groups is a unit for writing data and includes tracks. The input module receives a write command for data. The reading module reads data stored in the escape area and data from a first track group of the track groups. The writing module writes data received for the write command to the escape area, and writes merged data obtained by merging the data read from the escape area and the data read from the first track group to each track of a second track group of the track groups by using a shingle recording technique in which adjacent tracks are partly overlapped with each other.Type: GrantFiled: March 14, 2011Date of Patent: January 29, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuya Haga, Hideaki Tanaka, Tatsuo Nitta, Tadashi Hongawa, Takahiro Shinbori
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Publication number: 20110292538Abstract: According to one embodiment, a recording medium controller includes a recording medium, an input module, a reading module, and a writing module. The recording medium includes a write area and an escape area. The write area includes track groups. Each of the track groups is a unit for writing data and includes tracks. The input module receives a write command for data. The reading module reads data stored in the escape area and data from a first track group of the track groups. The writing module writes data received for the write command to the escape area, and writes merged data obtained by merging the data read from the escape area and the data read from the first track group to each track of a second track group of the track groups by using a shingle recording technique in which adjacent tracks are partly overlapped with each other.Type: ApplicationFiled: March 14, 2011Publication date: December 1, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Tatsuya HAGA, Hideaki Tanaka, Tatsuo Nitta, Tadashi Hongawa, Takahiro Shinbori
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Publication number: 20110292536Abstract: According to one embodiment, a data write control apparatus includes a magnetic disk, a write controller, and a retry controller. The magnetic disk includes a track in which data is recorded in sector unit. The write controller is configured to execute control to write a sector data block to a predetermined sector in the track. The retry controller is configured to execute control to retry a write process to a predetermined number of sectors to which data has been written and which include a first sector, and to manage the number of retries performed on each sector.Type: ApplicationFiled: May 13, 2011Publication date: December 1, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tadashi Hongawa, Hideaki Tanaka, Tatsuo Nitta, Tatsuya Haga, Takahiro Shinbori
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Publication number: 20110292533Abstract: According to one embodiment, a magnetic disk includes a disk, a controller and an indicator module. The disk includes a plurality of data sectors. The controller is configured to control data rewrite for reading a first data block stored in the disk and writing a second data block corresponding to the read first data block to a write destination on the disk. The indicator module is configured to embed an indicator indicative of an attribute relating to data rewrite in each sector data in the second data block written to the write destination when the each sector data is written to the write destination.Type: ApplicationFiled: April 4, 2011Publication date: December 1, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tatsuo NITTA, Hideaki Tanaka, Tatsuya Haga, Tadashi Hongawa, Takahiro Shinbori
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Publication number: 20100138670Abstract: According to one embodiment, a storage apparatus includes: a controller encrypting user data with a key, and writing the encrypted user data in a storage medium; and a key changing module changing the key. The storage medium includes a user data region and a key changing region. When the key is changed, the controller divides the user data written in the storage medium into a plurality of pieces, encrypts a piece of the user data adjacent to the key changing region with the changed key, writes the encrypted piece into the key changing region, sequentially shifts each of the pieces other than the piece of the user data adjacent to the key changing region by one logical block size in a direction toward the key changing region, and writes the shifted pieces.Type: ApplicationFiled: September 28, 2009Publication date: June 3, 2010Applicant: FUJITSU LIMITEDInventors: Takahiro Shinbori, Yoshiyuki Kudo, Hideaki Tanaka
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Publication number: 20090245522Abstract: A method of controlling a memory device connectable to a host for sending out a command to the memory device, has storing a plurality of first keys which are accessible by a plurality of passwords, respectively, encrypting a second key for encrypting and decrypting data to produce an encrypted second key by using one of the first keys, and storing the encrypted second key, decrypting the encrypted second key by using one of the first keys and encrypting or decrypting data by the second key upon receipt of a command from the host to encrypt or decrypt the data, and receiving, upon receipt of a command for renewing the second key from the host, a renewed second key, encrypting the renewed second key with one of the first keys, and storing the encrypted renewed second key.Type: ApplicationFiled: February 9, 2009Publication date: October 1, 2009Applicant: FUJITSU LIMITEDInventors: Yoshiyuki Kudo, Takahiro Shinbori
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Publication number: 20090175453Abstract: A storage apparatus has an encryption key updater for configuring an updated encryption key and identification information thereof, an encryptor for encrypting data by a specific unit according to the encryption key, a storage for adding the identification information to the encrypted data and storing the data and the identification information onto a recording medium, a reader for reading the encrypted data and the identification information, a judge for judging whether the identification information read by the reader matches the identification information configured by the encryption key updater, and a decryptor for decrypting the encrypted data and outputting the decrypted data where the judge judges that the identification information matches the identification information configured by the encryption key updater.Type: ApplicationFiled: October 29, 2008Publication date: July 9, 2009Applicant: FUJITSU LIMITEDInventors: Takahiro Shinbori, Hideaki Tanaka, Shigenori Yanagi, Katsuhiko Takeuchi
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Publication number: 20070101189Abstract: A rewrite verify processing unit rewrites read data on a sector requiring the number of times of retry equal to or more than a predetermined number of times during a process of reading a medium, and then perform a verify read. A rewrite verify managing unit records the sector processed by the rewrite verify processing unit and the number of times of processing on a rewrite verify management table, and assigns, and assigns the sector where the number of times of processing has reached a predetermined number of times to an alternative area for exclusion from a process target for a rewrite verify processing process.Type: ApplicationFiled: January 31, 2006Publication date: May 3, 2007Inventors: Takahiro Shinbori, Shigenori Yanagi, Yoshinori Suzuki
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Patent number: RE48952Abstract: According to one embodiment, a recording medium controller includes a recording medium, an input module, a reading module, and a writing module. The recording medium includes a write area and an escape area. The write area includes track groups. Each of the track groups is a unit for writing data and includes tracks. The input module receives a write command for data. The reading module reads data stored in the escape area and data from a first track group of the track groups. The writing module writes data received for the write command to the escape area, and writes merged data obtained by merging the data read from the escape area and the data read from the first track group to each track of a second track group of the track groups by using a shingle recording technique in which adjacent tracks are partly overlapped with each other.Type: GrantFiled: January 29, 2015Date of Patent: March 1, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tatsuya Haga, Hideaki Tanaka, Tatsuo Nitta, Tadashi Hongawa, Takahiro Shinbori