Hitachi, Ltd.

Renesas Technology Corp.

Renesas Electronics Corporation

Other

Hitachi Global Storage Technologies Netherlands B.v.

Hitachi Global Storage Technologies Japan, Ltd.

Hitachi Video Engineering, Incorporated

Hgst Netherlands, B.v.

Motoyasu Tsunoda

Shinya Iguchi

Junichi Maruyama

Hitoshi Ogawa

Tatsuya Ishii

Nagamasa Mizushima

Kenji Kozakai

Takeshi Nakamura

Kunihiro Katayama

Tsuneo Hirose

Shoichi Miyazawa

Akira Kojima

Takashi Oeda

Noriyuki Karasawa

Takashi Tsunehiro

Terumi Takashi

Yukari Katayama

Eisaku Saiki

Ryutaro Horita

Takashi Nara

Katsumi Yamamoto

Masatoshi Nishina

Yasunori Kaneda

Katsuhiro Tsuneta

Satoshi Kawamura

Yoshio Yukawa

Mitsuru Kubo

Yukihito Takada

Koichi Kimura

Atsushi Saito

Toshio Tanaka

Kyo Akagi

Takashi Yamaguchi

Tomihisa Hatano

Takashi Totsuka

Spencer W Ng

Soichi Isono

Frank R Chu

Syoichi Miyazawa

Fukashi Ohi

Yukie Miyazawa, Legal Representative

Koki Uefune

Kazuo Nakamura

Marco Sanvido

Kouki Uefune

Hideki Saga

Haruji Ishihara

Richard M H New

Tomohisa Kohiyama

Masaharu Ukeda

Atsushi Okuyama

Hideo Nagai

A method for implementing data storage and a dual port, dual element storage device are provided. A storage device includes a predefined form factor including a first port and a second port, and a first storage element and a second storage element. A controller coupled between the first port and second port, and the first storage element and second storage element controls access and provides two separate data paths to the first storage element and second storage element.

Implementing data storage and dual port, dual-element storage device

For a nonvolatile memory permitting electrical writing and erasing of information to be stored, such as a flash memory, the load on the system developer is to be reduced, and it is to be made possible to avoid, even if such important data for the system as management and address translation information are damaged, an abnormal state in which the system becomes unable to operate. The nonvolatile memory is provided with a replacing function to replace a group of memory cells including defective memory cells which are incapable of normal writing or erasion with a group of memory cells including no defective memory cell, a numbers of rewrites averaging function to grasp the number of data rewrites in each group of memory cells and to so perform replacement of memory cell groups that there may arise no substantial difference in the number of rewrites among a plurality of memory cell groups, and an error correcting function to detect and correct any error in data stored in the memory array, wherein first address translation information deriving from the replacing function and second address translation information deriving from the numbers of rewrites averaging function are stored in respectively prescribed areas in the memory array, and the first address translation information and second address translation information concerning the same memory cell group are stored in a plurality of sets in a time series.

Nonvolatile memory

A memory device is provided which is connected to operate with power and clocks supplied from a host apparatus. The memory device includes external terminals, a flash memory chip to store data, an IC chip to process data; and a controller chip connected with the external terminals, the flash memory chip and the IC chip. The flash memory chip, the IC chip and the controller chip are discrete chips. The controller chip writes data inputted from the host apparatus into the flash memory chip or the IC chip and transfers data read from the flash memory chip or the IC chip to the host apparatus, based upon commands from the host apparatus.

Memory card

A memory card has: a flash memory chip for storing digital certificates and a seed of random numbers; a controller chip which can execute a managing process for managing the digital certificates and a random number generating process for generating the pseudo random numbers by using the seed of random numbers; and an IC card chip which can execute an authenticating process for authenticating personal identification information (PIN) inputted from a host apparatus and an encrypting process for encrypting the seed of random numbers. Thus, a processing time of security processes is reduced while assuring safety of the security processes.

An agent computer system, acting on behalf of the user, provides the personal information to various wide area network sites for conducting online transactions. A user has a secure device with a built-in device identifier. A backup center has a computer system to be coupled to the secure device during backup of the personal information. The personal information is encrypted with a unique user ID as a key. The user ID is entered by the user. The user ID is irreversibly encrypted to a unique irreversibly encrypted user identifier. The secure device includes data executable to establish a new account, renew an old account, and transmission of the encrypted information along with the unique device identifier and the unique irreversibly encrypted user identifier to the backup center. The unique device identifier and the unique irreversibly encrypted user identifier are used for indexing the storage of the encrypted information.

Hidden data backup and retrieval for a secure device

A signal processing device having a feature of analog-to-digital converting a burst signal has a feature of selecting data bus to notify a disk control deviceof a conversion result via an NRZ data bus. The disk control deviceincludes means for storing the result of the analog-to-digital conversion of said servo positional signal. The positional signal of a head of the disk device is digitalized in an R/W channel. Sampling for digital conversion is performed in only a window which is defined only in the vicinity of peaks of the positional signal. The values of peaks which are obtained by sampling are averaged by an averaging circuit. This enables the influence of noise occurred outside of the window to be eliminated. Although the noise in the window is sampled, its adverse influence is suppressed by the averaging processing.

Disk device and method of generating signal representing head

A storage device allows expanding user utilizable applications by storing information permitted to be read according to a certificate and information permitted to be read according to information determined by a user. An information distributor receives a certificate from the storage device and after verifying the certificate, transmits data of a license and access control conditions to the storage device. After receiving data of a certificate from an information browser, verifying the certificate and imposing a limit on access based upon one of access control conditions, the storage device transmits data of the license and the other to the information browser. The information browser permits utilization of the license under the limitation defined by the access control condition. The certificate includes either or both of a certificate approved by a certificate authority and a PIN (personal identifying number) determined by the user.

Storage device

A hybrid disk drive, i.e., a disk drive with two types of permanent storage media (conventional disk media and nonvolatile memory, such as flash memory), uses its nonvolatile memory in operational modes other than the power-save or 'standby' mode wherein the disks are spun down. In a first additional mode, called a 'performance' mode, one or more blocks of write data are destaged from volatile memory (the disk drive's write cache) and written to the disk and simultaneously one or more data blocks of write data are destaged from the volatile memory and written to the nonvolatile memory. In a second additional mode, called a &#x201c;harsh-environment&#x201d; mode, the disk drive includes one or more environmental sensors, such as temperature and humidity sensors, and the nonvolatile memory temporarily replaces the disks as the permanent storage media. In a third additional mode, called a &#x201c;write-inhibit&#x201d; mode, the disk drive includes one or more write-inhibit detectors, such as a shock sensor for detecting disturbances and vibrations to the disk drive. In write-inhibit mode, if the write-inhibit signal is on then the write data is written from the volatile memory to the nonvolatile memory instead of to the disks.

Disk drive with nonvolatile memory having multiple modes of operation

An information read/write device has a first processor for instructing a second processor to write information onto or read information from a recording medium. The recording medium has a random access memory module which allows both processors to read or write data to the memory module. The second processor controls a scanning module for the recording medium, a write signal processing module and a read signal processing module. The read/write device is easy-to-operate while using a minimum of electric power consumption with prevention against electromagnetic interference (EMI) making the invention suitable for use in hand-held devices.

Information read/write device

A memory device is provided which is connected to operate with power and clocks supplied from a host apparatus. The memory device includes external terminals, a flash memory chip to store data, an IC chip to process data; and a controller chip connected with the external terminals, the flash memory chip and the IC chip, wherein, the flash memory chip, the IC chip and the controller chip are discrete chips. The controller chip writes data inputted from the host apparatus into the flash memory chip or the IC chip and transfers data read from the flash memory chip or the IC chip to the host apparatus, based upon commands from the host apparatus.

A storage device to store data includes an external interface, a controller, a nonvolatile memory, and an IC card. In response to a first indication from the external device, the controller receives a program to be executed in the IC card from the nonvolatile memory or the external device and writes the program in the IC card. In response to a second indication from the external device, the controller deletes the program written in the IC card.

Growing community of inventors

Sagamihara, Japan

Motoyasu Tsunoda