Controls for optical disk relating to accessing and utilization of such disk
First Claim
1. A rewriteable record member having a multiplicity of addressable signal storing areas and adapted to be scanned in a predetermined longitudinal direction, non-signal storing areas interposed between adjacent ones of the addressable signal storing areas along said longitudinal direction, the improvement including, in combination:
- first machine-sensible indicia in a first predetermined one of said addressable signal storing areas indicating that the rewriteable record member contains signals that are not to be changed from any original recording of such signals;
second machine-sensible indicia in a second predetermined one of said addressable signal storing areas indicating whether or not the record member has been erased once in its entirety; and
third machine-sensible indicia in each of said non-signal storing areas respectively indicating whether or not one of said adjacent ones of the data-storing ones of said adjacent addressable signal storing areas can be written to.
1 Assignment
0 Petitions
Accused Products
Abstract
Rewriteable media, such as magnetooptic record members or disk has its recording controlled such that the recording is certifiable as meeting write once read many characteristics. Controls are introduced for the entire disk for indicating that the rewriteable disk is to be used for certified or vault writing, at least in some radial zones of the disk. Recording or writing operations are limited to those addresssable areas on the certifiable rewriteable medium that have not been previously written. Each of the addressable areas of the medium, in a disk termed, sectors, have a precursor portion called a control area which indicates the status of the sector and is used for preventing overwriting or erasure as well as controlling.
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Citations
17 Claims
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1. A rewriteable record member having a multiplicity of addressable signal storing areas and adapted to be scanned in a predetermined longitudinal direction, non-signal storing areas interposed between adjacent ones of the addressable signal storing areas along said longitudinal direction, the improvement including, in combination:
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first machine-sensible indicia in a first predetermined one of said addressable signal storing areas indicating that the rewriteable record member contains signals that are not to be changed from any original recording of such signals; second machine-sensible indicia in a second predetermined one of said addressable signal storing areas indicating whether or not the record member has been erased once in its entirety; and third machine-sensible indicia in each of said non-signal storing areas respectively indicating whether or not one of said adjacent ones of the data-storing ones of said adjacent addressable signal storing areas can be written to. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a machine-effected method of operating an optical device having an optical record member and optical means for supplying a light beam to and receive a light beam from the record member for writing signals thereon and reading recorded signals therefrom, the record medium having a multiplicity of addressable signal storing areas and adapted to be scanned in a predetermined longitudinal direction, non-signal storing areas interposed between adjacent ones of the addressable signal storing areas along said longitudinal direction
including the machine-executed steps of: -
indelibly writing first machine-sensible indicia in a first predetermined one of said addressable signal storing areas for indicating that the rewriteable record member contains signals that are not to be changed from any original recording of such signals; after indelibly writing said first machine-sensible indicia, writing second machine-sensible indicia in a second predetermined one of said addressable signal storing areas for indicating whether or not given predetermined ones of the signal storing areas of the record member have been erased including if all of the record member has been formatted including erasure; allowing only one erasure in each of the given signal storing areas; and after indelibly writing said first machine-sensible indicia and while not writing said second machine-sensible indicia, writing third machine-sensible indicia in each of said non-signal storing areas respectively adjacent each of said given signal storing areas for indicating whether or not said respective adjacent addressable signal storing area can be written to. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. In apparatus for operating a recorder with a rewriteable medium having addressable signal storing areas and being for emulating write-once recording characteristics, including, in combination:
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a first write means that erases, writes and verifies writing to unerased ones of the signal storing areas; a second write means that writes and verifies writing signals to erased ones of the signal storing areas of the medium; format means for formatting the medium including erasing any areas of the medium being formatted including means for limiting the format means to one formatting operation per medium; and inhibit means connected to the format means and to said first and second write means for actuating the format means and the write means for effectively inhibiting erasure and overwriting of any signals written on the record medium. - View Dependent Claims (16, 17)
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Specification