Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1990-03-01
1991-10-15
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 58, 369 53, 369 54, 369 47, G11B 700
Patent
active
050580892
ABSTRACT:
An optical disc device includes an optical head for recording/reproducing information to and from an optical disc. The optical disc has two primary recording areas. On a first recording area of the two primary areas, the optical head records information so that the linear density of information is maintained constant. On a second recording area of the two primary areas, the optical head records information so that the spacing between adjacently recorded information increases with increasing radial position of the head or the recording position is further removed from the center of the optical disc. A substitute area is allocated such that the optical head records information in this substitute area when a defective memory portion portion is detected in the first and/or the second recording area during production or recording.
REFERENCES:
patent: 4532621 (1985-07-01), Nakagawa
patent: 4558375 (1985-12-01), Sontheimer
patent: 4761772 (1988-08-01), Murakami
patent: 4835757 (1989-05-01), Abiko
Kumagai Hideo
Yokota Tsuneshi
Yoshimaru Tomohisa
Envall Jr. Roy N.
Kabushiki Kaisha Toshiba
Tran Thang V.
LandOfFree
Memory disk and apparatus for recording information on memory di does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Memory disk and apparatus for recording information on memory di, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory disk and apparatus for recording information on memory di will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-996591