Method and devices for storing and reading data on a storage medium and storage medium
AssigneeKoninklijke Philips Electronics N.V.
InventorsRonald Marcel Tol, Gerrit Jan Scholl
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Abstract
The invention relates to a method and devices for storing and reading data (5, 6) on a storage medium (17). In order to allow compatibility between different file systems (JAFS, UDF) data structures are stored in a first administrative area (10) as belonging to the first file system (JAFS) and a second administrative area (12) belonging to the second file system (UDF). Thus, a so-called bridge disc is achieved that may be read in the different file systems.
Claims14
A method for storing data (5, 6) on a storage medium (1, 17, 20) whereby
- a) the data (5, 6) is stored in at least one part of a data area (4) and
- b) data structures representing the structures of said data (5, 6) are stored in a first administrative area (10) of a first file system (JAFS) characterized in that
- c) said data structures are stored in a second administrative area (13) of a second file system (UDF) whereby the beginning of the second administrative area (13) is written outside the first administrative area (10) and outside said data area (4).
A device for storing data (5, 6) on the storage medium (1, 17, 20) that stores data (5, 6) in at least one part of a data area (4) and data structures representing the structures of said data (5, 6) in a first administrative area (10) of a first file system (JAFS) characterized by
- writing means (19) for writing said data structures in a second administrative area (13) of a second file system (UDF) thereby writing the beginning of the second administrative area (13) outside the first administrative area (10) and outside said data area (4).
A device for reading data (5, 6) stored on a storage medium (1, 17, 20) comprising reading means (19) for reading data (5, 6) being stored in at least one part of a data area (4) and data structures representing the structures of the data (5, 6) and being stored in a first administrative area (10) of a first file system (JAFS) characterized in that
- said reading means (19) are designed for reading data structures stored in a second administrative area (12) of a second file system (UDF) representing the structures of said data (5, 6), the beginning (13) of said second administrative area (12) being located outside the first administrative area (10) and outside the data area (4).
A storage medium (1, 17, 20) comprising
- a) a data area (4) for storing data (5, 6) in at least one part of said data area (4) and
- b) a first administrative area (10) of a first file system (JAFS) for storing data structures representing the structure of said data characterized by
- c) a second administrative area (12) of a second file system (UDF) for storing said data structures
- d) the beginning (13) of said second administrative area (12) being located outside the first administrative area (10) and outside the data area (4).
Dependencies are inferred from the claim text.