Motoyasu Tsunoda
Hitachi
55 Papers
734 Citations
Motoyasu Tsunoda is an academic researcher from Hitachi. The author has contributed to research in topics: Signal & Reading (computer). The author has an hindex of 16, co-authored 55 publications. Previous affiliations of Motoyasu Tsunoda include HGST.
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Papers
Patent
Disk drive with nonvolatile memory having multiple modes of operation
Frank R. Chu,Richard M. H. New,Spencer W. Ng,Motoyasu Tsunoda +3 more
- 27 Jul 2006
TL;DR: A hybrid disk drive as discussed by the authors is a disk drive with two types of permanent storage media (conventional disk media and nonvolatile memory, such as flash memory), which uses its NVRAM in operational modes other than the power-save or "standby" mode wherein the disks are spun down.
138
Patent
Hidden data backup and retrieval for a secure device
Tomohisa Kohiyama,Motoyasu Tsunoda +1 more
- 21 Mar 2003
TL;DR: In this article, a user has a secure device with a built-in device identifier and a backup center has a computer system to be coupled to the secure device during backup of the personal information.
68
Patent
Storage device including a non-volatile memory
Shinya Iguchi,Takashi Tsunehiro,Motoyasu Tsunoda,Haruji Ishihara,Nagamasa Mizushima,Takashi Totsuka +5 more
- 05 Feb 2002
TL;DR: In this article, a tamper-resistant module and a flash memory are used to store large-capacity data while ensuring a security level corresponding to the size of the data stored in the memory.
68
Patent
Transferring data between volatile and non-volatile memories based on system parameters using a controller
Motoyasu Tsunoda,Shinya Iguchi,Junichi Maruyama,Kazuo Nakamura +3 more
- 13 Jun 2002
TL;DR: In this paper, the authors present a memory apparatus having a volatile memory for storing data from a host, a nonvolatile memory capable of storing the data stored in the volatile memory, and electrically deleting the data, and a control circuit for controlling data transfer between the volatile and non-volatile memories.
35
Patent
Hub apparatus with copyright protection function
Junichi Maruyama,Takashi Tsunehiro,Kunihiro Katayama,Takashi Totsuka,Motoyasu Tsunoda,Shinya Iguchi,Nagamasa Mizushima +6 more
- 08 Mar 2001
TL;DR: In this article, a license hub including a hub apparatus to which one or more apparatus and devices can be electrically connected, and a safe storage device for storing therein keys used to decode the encrypted contents data is added to the existing system to construct a license network.
29