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:
Nov. 21, 1995
Filed:
Jul. 21, 1992
Hideki Hosoya, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of recording information on a recording medium which is incapable of erasing and overwriting. The method uses an information processing system comprising an information recording apparatus to record and verify information to the recording medium. A controller is also used to control the recording apparatus, and a first computer is connected to the controller through a small computer interface. A plurality of logical blocks are provided on the recording medium, and different addresses are assigned to the blocks. When information is written to the blocks, a good status signal is provided when no error occurs. When an error occurs, the controller suspends the recording of the information, and produces sense data which comprises (i) an information byte indicative of an address of the logical block in which the error first occurred, and (ii) a last written block byte indicative of the address of the logical block in which the recording was last executed before the recording was suspended. When an error occurs, the host computer will send a command for retrying recording into a logical block next to the logical block indicated by the last written block byte of the sensed data. Thus, double recording can be prevented.