Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1988-05-25
1991-01-15
Psitos, Aristotelis M.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
360 7708, 360135, 369 13, 369 4439, G11B 7095, G11B 7013
Patent
active
049849018
ABSTRACT:
A mode of writing on a magnetic recording carrier (DISC) where the information is distributed over a plurality N of tracks, each track being associated with at least one reference zone (ZRP.sub.ij) including preamble information, absolute address information and fine-position information. According to the invention, the mode of writing is characterized in that the reference zone includes a first portion (GCP.sub.ij) comprising preamble and address information and a second portion (GDP.sub.ij) comprising fine-position information, the first portion being disposed and centered over the track of serial number j, while the second portion is offset by one-half of a track with respect to the center of that track and on the same side of that track. The invention is applicable to magnetooptical disk memories.
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Bull S.A.
Psitos Aristotelis M.
Young W. R.
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