Hitachi, Ltd.

Hitachi Global Storage Technologies Japan, Ltd.

Hitachi High-tech Electronics Engineering Co., Ltd.

Hideaki Amano

Katsuhiro Tsuneta

Yuichi Koizumi

Koji Kodama

Kenji Mori

Takashi Yoshida

Akio Takatsuka

Toshio Matsushita

Takashi Yamaguchi

Hiromu Hirai

Tomoaki Inoue

Satoru Yamaura

Masaaki Nakano

Asao Sasamoto

Takashi Kono

Kenji Tomida

Makiko Shinohara

Takashi Kohno

Haruhiko Hosokawa

Shigeo Nakamura

Yasuhiro Yoshimura

Masahito Kobayashi

Hiroshi Nishida

Yuji Kobayashi

Toshihiro Yamada

Toshiaki Tsuyoshi

Kazuo Nakagoshi

Toshihisa Okazaki

Ryoji Okada

Toshiaki Makino

Teruyoshi Higashiya

Teruaki Tokutomi

Osamu Onodera

Katsuyuki Tanaka

Marutomo Goto

Hideyuki Kimura

Takeshi Yoshida

Osamu Beppu

Kazuyoshi Hanada

Masayuki Katsumoto

Toshiyuki Haruna

Tetsuji Higashijima

Toshio Shiono

Hiroyuki Sugimoto

Takahisa Ishida

Chikayuki Sogabe

Tetsuji Kameoka

Yuichi Otani

Tuneyuki Hasegawa

Kinya Eguchi

Munesige Maeda

Motohiro Nakai

Ken Uehara

Yoichi Inoue

Fujio Tajima

Kazuyuki Sonobe

Yasunori Fukuyama

Tsutomu Nagakura

Noritake Shizawa

Sigeru Okamoto

Takeshi Sato

Kouji Kodama

Mituhiko Oguchi

Takashi Hamada

Yasusuke Nakada

An information storing device and an information processing device having a memory for registering a plurality of working modes at recording/reproduction and a switching circuit for selecting one of the plurality of working modes, which select the optimum working mode automatically or by an instruction of an operator according to power supply capacity of a device of higher rank to effect recording/reproduction.

Information storing device and method for controlling same to record/reproduce information by selecting one of working modes

An abrasive tape is supplied to a tape head by a tape supply unit and taken up from the tape head by a tape take-up unit. The tape head presses the abrasive tape against a surface of an object under polish, which is rotated by a rotating unit. A tape head pressuring unit utilizes a voice coil motor, for example. Since the tape head pressuring unit generates a pressuring force for pressuring the tape head using the electromagnetic force, it is able to set a minute pressuring force by controlling a drive signal, and to obtain the fine adjustment of the pressuring force easily by controlling the electric signal. Therefore, it becomes possible to press the abrasive tape against the surface of the object under polish with a desired low pressure.

Polishing apparatus with abrasive tape, polishing method using abrasive tape and manufacturing method for magnetic disk

Information storing device and method for controlling same to record/reproduce information by selection one of working modes

Correction of a program which resides on a main storage and which is simultaneously callable by a plurality of command processors is performed by minimizing the stop time of a computer system without reloading a program. A particular command processor calls a correction execution program which corrects a program in accordance with a program correction command. The correction execution program reads program correction information, sets correction execution declaration information in all entries of other command processor in the correction execution declaration area of the main storage and after clearing all entries, the correction execution program corrects the program in accordance with the program correction information. The correction execution program sets correction completion reporting information in all entries for all of the other command processors in the correction completion reporting area of the main storage. The correction execution program waits for the correction completion reporting area to be cleared, at which time it sends the corrected program to the external storage. The program to be corrected calls a correction wait program, which recognizes the command processor which has called the correction wait program itself, checks an entry of the appropriate command processor in the correction execution declaration area. When the correction execution declaration information has been set, the correction wait program clears the correction execution declaration information, repeatedly checks the entry of the appropriate command processor in the correction completion reporting area, and when the correction completion reporting information has been set, clears same to thereby terminate the processing.

Program correcting method and system

An information storing device and an information processing device having a memory for registering a plurality of working modes at recording/reproduction and a switching circuit for selecting one of the plurality of working modes, which select the optimum working mode automatically or by an instruction of ah operator according to power supply capacity of a device of higher rank to effect recording/reproduction.

Correction of a program which resides on a main storage and which is simultaneously callable by a plurality of command processors is performed by minimizing the stop time of a computer system without reloading a program. A particular command processor calls a correction execution program which corrects a program in accordance with a program correction command. The correction execution program reads program correction information, sets correction execution declaration information in all entries of other command processor in the correction execution declaration area of the main storage and after clearing all entries, the correction execution program corrects the program in accordance with the program correction information. The correction execution program sets correction completion reporting information in all entries for all of the other command processors in the correction completion reporting area of the main storage. The correction execution program waits for the correction completion reporting area to be cleared, at which time it sends the corrected program to the external storage. The program to be corrected calls a correction wait program, which recognizes the command processor which has called the correction wait program itself, checks an entry of the appropriate command processor in the correction execution declaration area.

Information storing device and method for controlling same to

A recording disk apparatus comprises a clearance between a shaft and a thrust bearing portion tapered in a circumferential direction, a lubricant communication groove of a bearing covered by the shaft so that a lubricant on a radial bearing portion communicates with the lubricant on the thrust bearing portion through the lubricant communication groove, a lubricant circulating path which extends axially from the thrust bearing portion to the radial bearing portion to prevent the lubricant flowing out of the thrust bearing portion from returning directly to the thrust bearing portion without passing the radial bearing portion, and/or a clearance between a slide bearing and a magnetic fluid seal device substantially filled with a magnetic fluid lubricant.

Recording disk apparatus and rotational supporting structure therefor,

A magnetic disk apparatus includes a dual head equipped with an MR head for reading data and an inductive head for writing the data. One ID portion and one servo pattern are disposed in one sector and an unequal track pitch is formed. The ID portion is formed at the center of a radius of two positions to which the MR head is positioned at the time of reading the data and writing the data, respectively.

Magnetic disk apparatus

Recording disk apparatus and rotational supporting structure therefor

A magnetic disc apparatus includes a casing for defining a sealed space, a magnetic disc disposed within the space, a spindle to which the magnetic disc is fixed, a motor for rotating the spindle, a flying head slider for writing and/or reading information in and/or from the magnetic disc and a carriage for translating the flying head slider. The magnetic disc apparatus incorporates an organic chemical compound capable of suppressing siloxane from being chemically changed to silicon oxide. The organic chemical compound contains at least one of monoalkyl-substituted benzene, dialkyl-substituted benzene, trialkyl-substituted benzene, fatty acid, fatty ester, alkyl ester of aromatic acid, thiazoles and phenols.

Magnetic disc apparatus and magnetic disc

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Odawara, Japan

Hideaki Amano