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:
Jan. 10, 2012
Filed:
Jan. 22, 2007
Atsushi Fuchiwaki, Yokohama, JP;
Atsushi Fuchiwaki, Yokohama, JP;
Hitachi-LG Data Storage, Inc., Tokyo, JP;
Abstract
When data is to be written on an optical disc in the unit of a sector, an attempt is made to read a block A to which a write sector belongs for the purpose of judging whether the block can be normally read. If the block A is not successfully read, it is judged to be a defective area, and an alternative write is performed in an alternative area in the unit of a sector. The alternative write may be performed so that a plurality of sectors belonging to the same block are dispersively written in different blocks d, E. When new data is to be written in a new sector in such a situation, data is acquired from the dispersed other sectors, merged with the new data, and collectively rewritten in the same block E.