Data processing apparatus and access control method
AssigneeFujitsu Limited
InventorsKATSUMI SHIRAI, ICHIRO ANZAI
Life of this patent
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Abstract
An accessible count information which is the number of accessible times for recording medium is recorded on an additional recording dedicated area in the recording medium. Each time the recording medium is accessed, the accessible count information is subtracted and the value of remaining accessible count information is recorded in a non-recorded portion of the dedicated area. In this case, the access to the recording medium is controlled based on the minimum value of the accessible count information recorded in the dedicated area.
Claims20
A data processing apparatus for accessing a recording medium for reading and writing of data comprising:
- a setting unit for setting a predetermined area on said recording medium as an dedicated area for additional recording, in which the rewriting of recorded data is inhibited but in which the writing of data in a non-recorded portion is permitted;
- a recording unit for recording access control information in said dedicated area;
- and
- an access controller for controlling access to said recording medium based on said access control information recorded in said dedicated area.
A access control method for accessing a recording medium for reading and writing of data comprising the steps of:
- recording access control information in a dedicated area for additional recording on said recording medium, in which the rewriting of recorded data is inhibited but in which the writing of data in a non-recorded portion is permitted;
- and
- controlling access to said recording medium based on said access control information recorded in said dedicated area.
A recording medium comprising:
- a data area;
- and
- an access control area in which access control information used for controlling access to said the data area is set,
- wherein said access control area is a dedicated area for additional recording, in which the rewriting of recorded data is inhibited but in which the writing of data in a non-recorded portion is permitted.
Dependencies are inferred from the claim text.