Patents by Inventor Shigeru Takemura
Shigeru Takemura 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: 8504762Abstract: A storage device realizing an improvement in rewrite endurance of a nonvolatile memory and an improvement in data transfer rate of write and read operations is provided including a nonvolatile memory; a volatile memory for storing file management information of the nonvolatile memory; a controller for controlling the nonvolatile memory and the volatile memory; and a power supply maintaining unit for supplying power to the nonvolatile memory, the volatile memory, or the controller upon power shutdown. The controller reads the file management information in the nonvolatile memory upon power-on and writes the same in the volatile memory, and read and write operations are performed based on the file management information in the volatile memory, and the file management information in the volatile memory is written in the nonvolatile memory upon power shutdown.Type: GrantFiled: June 1, 2012Date of Patent: August 6, 2013Assignee: Hitachi ULSI Systems Co., Ltd.Inventors: Masahiro Matsumoto, Takayuki Okinaga, Shuichiro Azuma, Shigeru Takemura, Yasuyuki Koike, Kazuki Makuni
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Patent number: 8291149Abstract: A storage device includes a drive selection section (1), a hard disk drive (HDD) (2), and a non-volatile memory drive (3). When an instruction such as a data I/O instruction is issued from a host such as a CPU (5) and an ATA controller (6) to the hard disk drive (HDD) (2), the drive selection section (1) receives the address value. If the address value is included in the address space predefined, the non-volatile memory drive (3) is made to execute the instruction. Otherwise, the hard disk drive (HDD) (2) is made to execute the instruction.Type: GrantFiled: July 5, 2004Date of Patent: October 16, 2012Assignee: Hitachi ULSI Systems Co., Ltd.Inventors: Shuichiro Azuma, Masahiro Matsumoto, Takayuki Okinaga, Shigeru Takemura, Yoshiyuki Kimata, Takayuki Kishimoto
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Publication number: 20120239865Abstract: A storage device realizing an improvement in rewrite endurance of a nonvolatile memory and an improvement in data transfer rate of write and read operations is provided including a nonvolatile memory; a volatile memory for storing file management information of the nonvolatile memory; a controller for controlling the nonvolatile memory and the volatile memory; and a power supply maintaining unit for supplying power to the nonvolatile memory, the volatile memory, or the controller upon power shutdown. The controller reads the file management information in the nonvolatile memory upon power-on and writes the same in the volatile memory, and read and write operations are performed based on the file management information in the volatile memory, and the file management information in the volatile memory is written in the nonvolatile memory upon power shutdown.Type: ApplicationFiled: June 1, 2012Publication date: September 20, 2012Applicant: HITACHI ULSI SYSTEMS CO., LTD.Inventors: Masahiro Matsumoto, Takayuki Okinaga, Shuichiro Azuma, Shigeru Takemura, Yasuyuki Koike, Kazuki Makuni
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Patent number: 8205034Abstract: A storage device realizing an improvement in rewrite endurance of a nonvolatile memory and an improvement in data transfer rate of write and read operations is provided including a nonvolatile memory; a volatile memory for storing file management information of the nonvolatile memory; a controller for controlling the nonvolatile memory and the volatile memory; and a power supply maintaining unit for supplying power to the nonvolatile memory, the volatile memory, or the controller upon power shutdown. The controller reads the file management information in the nonvolatile memory upon power-on and writes the same in the volatile memory, and read and write operations are performed based on the file management information in the volatile memory, and the file management information in the volatile memory is written in the nonvolatile memory upon power shutdown.Type: GrantFiled: July 4, 2007Date of Patent: June 19, 2012Assignee: Hitachi ULSI Systems Co., Ltd.Inventors: Masahiro Matsumoto, Takayuki Okinaga, Shuichiro Azuma, Shigeru Takemura, Yasuyuki Koike, Kazuki Makuni
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Publication number: 20100180068Abstract: A storage device realizing an improvement in rewrite endurance of a nonvolatile memory and an improvement in data transfer rate of write and read is provided including a nonvolatile memory 101; a volatile memory 106 for storing file management information of the nonvolatile memory 101; a controller 103 for controlling the nonvolatile memory 101 and the volatile memory 106; and a power supply maintaining unit 105 for supplying power to the nonvolatile memory 101, the volatile memory 106, or the controller 103 upon power shutdown. The controller 103 reads the file management information in the nonvolatile memory 101 upon power-on and writes the same in the volatile memory 106, and read and write operations are performed based on the file management information in the volatile memory 106, and the file management information in the volatile memory 106 is written in the nonvolatile memory 101 upon power shutdown.Type: ApplicationFiled: July 4, 2007Publication date: July 15, 2010Inventors: Masahiro Matsumoto, Takayuki Okinaga, Shuichiro Azuma, Shigeru Takemura, Yasuyuki Koike, Kazuki Makuni
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Publication number: 20080117548Abstract: A storage device includes a drive selection section (1), a hard disk drive (HDD) (2), and a non-volatile memory drive (3). When an instruction such as a data I/O instruction is issued from a host such as a CPU (5) and an ATA controller (6) to the hard disk drive (HDD) (2), the drive selection section (1) receives the address value. If the address value is included in the address space predefined, the non-volatile memory drive (3) is made to execute the instruction. Otherwise, the hard disk drive (HDD) (2) is made to execute the instruction.Type: ApplicationFiled: July 5, 2004Publication date: May 22, 2008Inventors: Shuichiro Azuma, Masahiro Matsumoto, Takayuki Okinaga, Shigeru Takemura, Yoshiyuki Kimata, Takayuki Kishimoto
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Patent number: 5831956Abstract: A disc device which performs to ascend and descend an ascending and descending chassis mechanically by a slide plate provided at a tray at the time of insertion or discharge of the tray, and maintains the ascending and descending chassis at the ascending position or lowers it by latching or separating the above slide plate with a lock member. In order to attain the above object, a guided portion 9 is provided to the ascent and descent chassis and a guide member 82 which ascends and descends the above guided portion 9 by front and rear moving operation is positioned at both sides of the above ascending and descending chassis 2 so as to be able to move in front and rear direction. In addition, a slide plate 102 which urges the guide member 82 to a tray 100, and a lock means which latches the above slide plate 102 so as to be able to latch or separate, are provided.Type: GrantFiled: November 1, 1996Date of Patent: November 3, 1998Assignee: Funai Electric Co., Ltd.Inventors: Kunio Sawai, Katuyuki Yokota, Hideki Kume, Shigeru Takemura, Masaaki Takagi, Nobuyuki Kimura