Track format and record carrier system for split data field supp

Details Track format and record carrier system for split data field supp Track format and record carrier system for split data field supp

1994-12-27

1996-03-12

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 4426, 360 75, 360 7705, 360 7708, G11B 724

Patent

active

054992320

ABSTRACT:
The invention provides a track format and a record carrier system for supporting a track architecture where a first field, such as a data field, is split by a second field, like a servo field. The preferred track format includes a split count field that contains information on the location of the second field with respect to the first field. In the preferred embodiment, the split count field is located in the header associated with the data field. The present invention also includes circuitry that reads the split count and uses the split count to discriminate the first field from the second field or the information contained in the first field from the information contained the second field. The invention is particularly useful in modified constant angular velocity (MCAV) magnetic disk systems where constant frequency servo fields are embedded among variable frequency data fields. The present invention is, however, applicable to any kind of record carrier where one field is split by another field. For instance, the invention can be used with constant linear velocity (CLV) and constant angular velocity (CAV) data storage systems. Moreover, the invention can be used with different types of recording media, such as magnetic media and optical media.

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