The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2006
Filed:
Oct. 02, 2003
Yuichi Kanai, Moriguchi, JP;
Yoshihiro Hori, Moriguchi, JP;
Ryoji Ohno, Osaka, JP;
Takeo Ohishi, Yokohama, JP;
Kenichiro Tada, Tokyo, JP;
Tatsuya Hirai, Tokyo, JP;
Jun Kamada, Kawasaki, JP;
Yuichi Kanai, Moriguchi, JP;
Yoshihiro Hori, Moriguchi, JP;
Ryoji Ohno, Osaka, JP;
Takeo Ohishi, Yokohama, JP;
Kenichiro Tada, Tokyo, JP;
Tatsuya Hirai, Tokyo, JP;
Jun Kamada, Kawasaki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Sharp Corporation, Osaka, JP;
Victor Company of Japan, Limited, Yokohama, JP;
Pioneer Corporation, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A recording area of a hard disk is managed by units. Each unit comprises physically continuous recording regions having predetermined size, and usage status of the unit is stored in an allocation unit (AU) management table. Data requiring a real time processing is stored in each unit. When the usage status of the unit is changed or modified due to the recording or deletion of data, the AU management table is updated and then information indicative of the fact that the AU management table has been updated is recorded. An apparatus where the final change is made is detected at the time the hard disk is inserted or a file system is initialized. And if the apparatus which last made the change adopts the file system which does not use the AU management table, then the table is reconfigured so as to retain the consistency of the AU management table.