Method and apparatus for reading and/or writing a data disk
AssigneeKoninklijke Philips Electronics N.V.
InventorsGheorghe Sorin Stan, Andre Latenstein Van Voorst
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Abstract
The invention relates to a method and an apparatus for reading and/or writing data on a disk (1) storing data in a continuous spiral form (2). The data is simultaneously read from or written to N tracks (4-8, 12-20) by N spots, N being an integer larger than or equal to 2. The reading and/or writing is performed by alternating between reading/writing and actuator jumps. In order to increase the efficiency of such multi track disk drives a next jump decision is calculated dynamically on the basis of a real-time analysis determining a next position of a unit (23) for reading/writing data relative to the disk (1).
Claims11
A method for reading and/or writing a data disk (1) wherein said data is stored on said disk (1) in a continuous spiral form, thereby
- a) rotating said disk (1) relative to a reading and/or writing unit (23) for reading and/or writing said data,
- b) said reading and/or writing unit (23) being actuated by actuating means, and
- c) reading and/or writing said data simultaneously in N tracks (4-8, 12-20) by N spots (24), N being an integer of 2 or greater,
- d) said reading and/or writing being performed by alternating between a continuous reading and/or writing and an actuator jump characterized by
- e) calculating the next actuator jump dynamically on the basis of a real-time analysis determining a next position of said reading and/or writing unit (23) relative to said disk (1).
An apparatus for reading and/or writing a data disk (1), the data being stored on said disk (1) in a continuous spiral form, the apparatus comprising
- a) rotating means for rotating said disk relative to a reading and/or writing unit (23) for reading and/or writing said data,
- b) said reading and/or writing unit comprising reading and/or writing means having N spots for reading and/or writing said data simultaneously from/in N tracks, N being an integer of 2 or greater,
- c) actuator means (26) for actuating said head (23) being designed to perform alternation between a continuous reading and/or writing and an actuator jump, characterized by
- d) calculation means (30) for calculating the next actuator jump dynamically on the basis of a real-time analysis determining a next position of said reading and/or writing unit (23) relative to said disk (1).
Dependencies are inferred from the claim text.