Sony Corporation

Nippon Zeon Company, Ltd.

Takeshi Sasa

Kazuya Suzuki

Hajime Nishimura

Tetsuya Tamura

Takehisa Ishida

Eiki Oyanagi

Teiji Kohara

Hiroshi Takino

Masayoshi Oshima

Shoji Tanaka

Yasuyuki Imai

Toshihiko Takegawa

A composite memory device, a data processing method and a data processing program can efficiently and selectively use a nonvolatile solid-state memory and a recording medium. The composite medium device includes a nonvolatile solid-state memory and a recording medium and is adapted to combine the data area of the recording medium and the data area of the nonvolatile solid-state memory and manage them as totally or partly integrated data area by means of a predetermined file system. The composite memory device is connected to a host appliance by way of an interface section.

Composite memory device, data processing method and data processing program

There is provided a composite type recording apparatus restricting write operations depending on the type of a connected host apparatus, including a recording medium having a first data region, a non-volatile storage medium having a second data region and an identification information table for integrating and managing the first and second data region, an information selection section for selecting positional information having predetermined identification information from the identification information table according to the type of the host apparatus, a conversion section for converting positional information selected by the information selection section into positional information matching the first data region or positional information matching the second data region, a first write section for writing data supplied from the host apparatus in the first data region according to conversion process of the conversion section and a second write section for writing data supplied from the host apparatus in the second data region.

Composite type recording apparatus, data writing method and data writing program

A data storage apparatus is provided. The data storage apparatus includes: a storage unit managed using a logical block address; a memory; a storage control unit for storing in the storage unit a free area control table transmitted from the host apparatus in which information on a free area in the storage unit is stored; an expanding unit for reading the free area control table in the storage unit and expanding it in the memory; a recording unit for recording data transmitted from the host apparatus into a free area in the storage unit on the basis of the free area control table in the memory; an updating unit for updating the free area control table in the memory after the data recording unit has completed a recording operation; and a transmission unit for transmitting to the host apparatus updated information included in the free area control table which has been updated by the updating unit.

Data storage apparatus and data access method for controlling address information for data writing using a free area control table

There is provided a recording apparatus which includes a recording medium having a data area with an address assigned to each cluster of a predetermined size; an interface for connection to a host apparatus; writing means for writing data in the data area; access order deciding means for dividing the data area of the recording medium into a plurality of areas each having an optional data capacity, and deciding an order of accessing the divided areas from the writing means; timing deciding means for deciding a timing when file information on written data is to be updated; control means for controlling the writing means to access a plurality of divided areas in accordance with the decided access order, search an empty cluster in the accessed area, and write data in the searched empty cluster and file information updating means for updating the file information on already written data.

Recording apparatus

A recording/reproducing apparatus is provided which can write continuously a file of large-capacity at high-speed. A record area of HDD is provided with a disk cache area for temporarily storing data to be written. The disk cache area is defined as a area that is not used by a host apparatus () in an LBA space, and the disk cache area is disposed in an area with a high transfer rate such as an outer circumferential area of a disk (). A file transferred from the host apparatus () is written in the disk cache area, and the file is transferred from the disk cache area to a usual user area during an idle period to release the disk cache area and prepare for next transfer data write.

Recording and reproducing apparatus and recording method

There is provided a composite memory device including a recording medium and nonvolatile recording medium and in which data is written to and read from the recording mediums on the basis of a common file system, the recording medium () having a first data area, the nonvolatile recording medium () having a second data area and an identification information table to manage the first and second data area collectively. The device further includes an information selector () to select positional information including predetermined identification information on the basis of the identification information table, converter () to convert positional information selected by the information selector () into position information corresponding to the first data area or into positional information corresponding to the second data area, first writing unit to write data supplied from a host device to the first data area and a second writing unit to write data supplied to the host device to the second data area.

Composite memory device, data wiring method and program

A data-storage apparatus, a data-storage method and a recording/reproducing system are provided, which effectively use the time elapsing before data is transferred to be written in a recording medium, such as disc-seeking time and disc-rotation standby time, thereby to raise the speed of transferring data. A hybrid storage apparatus has two storage areas, i.e., a disc and a nonvolatile solid-state memory. The disc and the memory have a disc cache area, a system area, and a user area each. If data is transferred from the host apparatus, it is written into the cache area of the nonvolatile solid-state memory that can be accessed at high speed for the first super cluster. While the data being so written, the head is moved to a prescribed position. Any data coming after the head is moved to this position is written into the cache area.

Data-storage apparatus, data-storage method and recording/reproducing system

A magnetic disk with an embossed pattern is provided. The disk comprises a magnetic film formed on a substrate provided with an erose embossed pattern on a surface along a circumferential direction, said embossed pattern having an upper surface, a lower surface, and a inclined portion or a vertical portion between the upper surface and the lower surface. In the disk, at least the magnetic film in the inclined portion or the vertical portion of the embossed pattern is magnetized, the direction of said magnetization in the magnetic film in the inclined portion or the vertical portion in cross section in the circumferential direction of the magnetic disk is substantially parallel with a film surface of the magnetic film, and said magnetic film in the inclined portion or the vertical portion has a magnetization reversal area.

Magnetic disk with embossed pattern

Mold for making disc substrate, process for producing mold and disc

Disc medium substrate and disc device

A clamped region of a hard disk comprising a plastic base plate is vertically clamped between a clamp base and a clamp cap which have respective upper and lower clamping surfaces that are held in contact with an intermediate area of the clamped region and out of contact with inner and outer areas of the clamped region. The disk thus clamped by the clamp base and the clamp cap are prevented from being unduly strained in its entirety.

Growing community of inventors

Miyagi, Japan

Takeshi Sasa