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Tobita Tsunehiro, Kitahara Jun, Tsunehiro Takashi, Katayama Kunihiro, Hattori Ryuichi, Seki Yukihiro, Yamagami Hajime, Totsuka Takashi, Wada Takeshi, Takaya Yosio, Saito Manabu, Kaki Kenichi, Okubo Takao, Kikuchi Takashi, Kishi Masamichi, Suzuki Takeshi, Kadowaki Shigeru: Flash memory control method and information processing system therewith.. Hitachi, Hitachi Keiyo Eng, Hitachi Ulsi Eng, October 12, 1994: EP0619541-A2 (68 worldwide citation)

A control method and system when a flash memory is used as a semiconductor disk or a main memory in an information processing system. A semiconductor file system comprises a first nonvolatile memory electrically erasable, a second nonvolatile memory not electrically erasable, a volatile memory, a co ...


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Yamagami Hajime, Terada Kouichi, Hayashi Yoshihiro, Tsunehiro Takashi, Katayama Kunihiro, Kaki Kenichi, Furuno Takeshi: Storage device employing a flash memory.. Hitachi, June 30, 1993: EP0548564-A2 (32 worldwide citation)

In a semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium; a semiconductor disk comprising a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in ...


3
Katayama Kunihiro, Tsunehiro Takashi, Kaki Kenichi, Wada Takeshi, Furuno Takeshi, Totsuka Takashi: Information device employing flash memory. Hitachi, July 5, 2007: JP2007-172650 (3 worldwide citation)

PROBLEM TO BE SOLVED: To achieve hardware configuration and a method for handling of data for compensating for the limited number of eliminations which is a disadvantage of a flash memory for materializing an auxiliary storage device by using the flash memory.SOLUTION: The inside of the flash memory ...


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Katayama Kunihiro, Tsunehiro Takashi, Kaki Kenichi, Wada Takeshi, Furuno Takeshi, Totsuka Takashi: Information device employing flash memory. Hitachi, October 5, 2006: JP2006-268880 (2 worldwide citation)

PROBLEM TO BE SOLVED: To extend service life as a system by averaging increase in elimination frequency, by replacing data in a high-elimination-frequency region by data in a low-elimination-frequency region, in a data control system of an auxiliary storage device, using a flash memory having limite ...


5
Kaki Kenichi, Katayama Kunihiro, Tsunehiro Takashi: Semiconductor storage device. Hitachi, May 30, 2000: JP2000-148583 (2 worldwide citation)

PROBLEM TO BE SOLVED: To attain high speed writing with respect to a semiconductor disk device using a flash memory whose writing operation is slow as compared with reading operation. SOLUTION: The semiconductor disk device is provided with a reference bus 1, a plurality of flash memories 4, a write ...


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Kaki Kenichi, Katayama Kunihiro, Tsunehiro Takashi: Semiconductor disk device. Renesas Technology, May 8, 2008: JP2008-108281 (1 worldwide citation)

PROBLEM TO BE SOLVED: To provide high-speed writing in a semiconductor disk device using a flash memory with low-speed writing in comparison with reading.SOLUTION: The semiconductor disk device has a standard bus 1, a plurality of flash memories 4, a write buffer memory 5 for temporarily holding dat ...


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Katayama Kunihiro, Tsunehiro Takashi, Kaki Kenichi, Wada Takeshi, Furuno Takeshi, Totsuka Takashi: Information processing system. Hitachi, October 28, 2004: JP2004-303278 (1 worldwide citation)

PROBLEM TO BE SOLVED: To solve the problem wherein the lifetime is extremely shortened since rewrite occurs and concentrates on a certain location every time data write access occurs.SOLUTION: When a write request from a processor is a rewrite request for a logical sector where data have already bee ...


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Kaki Kenichi, Katayama Kunihiro, Tsunehiro Takashi: Semiconductor memory device. Hitachi, June 16, 2000: JP2000-163314 (1 worldwide citation)

PROBLEM TO BE SOLVED: To provide high-speed write concerning a semiconductor disk device using a flash memory with which the speed of write is low in comparison with that of read.SOLUTION: This device has a standard bus 1, plural flash memories 4, a write buffer memory 5 for temporarily holding data ...


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Katayama Kunihiro, Tsunehiro Takashi, Kaki Kenichi, Wada Takeshi, Furuno Takeshi, Totsuka Takashi: Storage device. Hitachi, April 2, 2004: JP2004-103043 (1 worldwide citation)

PROBLEM TO BE SOLVED: To compensate the limitation of the number of erasures which is the disadvantage of a flash memory for a hardware configuration and data handling, when an auxiliary storage is implemented using the flash memory.SOLUTION: The internal part of a flash memory 1 is divided into sec ...


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Kaki Kenichi, Katayama Kunihiro, Tsunehiro Takashi: Semiconductor storage device. Hitachi, August 23, 2002: JP2002-236612 (1 worldwide citation)

PROBLEM TO BE SOLVED: To provide high-speed writing in a semiconductor disc device using a flash memory low in writing speed compared with reading.SOLUTION: This semiconductor storage device has a standard bus 1, a plurality of flash memories 4, a light buffer memory 5 for temporarily holding data, ...