Information recording medium, information recording/reproducing method, and information recording/reproducing device

A data storage medium readable by a computer to record and reproduce files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, the data storage medium comprising:

• an open integrity information area for recording at least one logical volume integrity descriptor containing address information for close integrity information, said close integrity information indicating a close status assuring the integrity of the volume/file structure recorded in the volume space;
• and
• a close integrity information area for recording at least one logical volume integrity descriptor containing address information for open integrity information, said open integrity information indicating an open status indicative of a start of a volume/file structure recording operation,
• wherein an overrun extent is recorded in a volume space, said overrun extent having an unrecorded open integrity information area and close integrity information area allocated for respectively update-recording open integrity information and close integrity information, the computer managing a file by reading the data storage medium.

A data recording method for recording data to a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data recording method comprising:

• recording as a part of the volume/file structure a partition descriptor containing address information for an unallocated space information control block (ICB) for managing unallocated space in a volume space, and
• recording a logical volume descriptor containing address information for root directory ICB for managing a directory structure under the root directory;
• said unallocated space ICB containing address information for a following unallocated space ICB and address information for unallocated space;
• said root directory ICB containing address information for a following root directory ICB and address information for a root directory file;
• and
• said unallocated space ICB and root directory ICB being recorded to a chaining information area as chaining information that is part of a progressively updated and recorded file structure.

A data recording method for recording data to a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data recording method comprising:

• recording a logical volume integrity descriptor to an open integrity information area, said logical volume integrity descriptor containing address information for close integrity information, said close integrity information indicating a close status assuring the integrity of the volume/file structure recorded in the volume space;
• and
• recording a logical volume integrity descriptor to a close integrity information area, said logical volume integrity descriptor containing address information for open integrity information, said open integrity information indicating an open status indicative of a start of a volume/file structure recording operation,
• wherein an overrun extent is recorded in a volume space, said overrun extent having an unrecorded open integrity information area and close integrity information area allocated for respectively update-recording open integrity information and close integrity information.

A data recording apparatus for recording data to a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data recording apparatus comprising:

• means for recording as a part of the volume/file structure a partition descriptor containing address information for an unallocated space information control block (ICB) for managing unallocated space in a volume space, and
• means for recording a logical volume descriptor containing address information for a root directory ICB for managing a directory structure under the root directory;
• said unallocated space ICB containing address information for a following unallocated space ICB and address information for unallocated space;
• said root directory ICB containing address information for a following root directory ICB and address information for a root directory file;
• and
• said unallocated space ICB and root directory ICB being recorded to a chaining information area as chaining information that is part of a progressively updated and recorded file structure.

A data recording apparatus for recording data to a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data recording apparatus comprising:

• means for recording a logical volume integrity descriptor to an open integrity information area, said logical volume integrity descriptor containing address information for close integrity information, said close integrity information indicating a close status assuring the integrity of the volume/file structure recorded in the volume space;
• and
• means for recording a logical volume integrity descriptor to a close integrity information area, said logical volume integrity descriptor containing address information for open integrity information, said open integrity information indicating an open status indicative of a start of a volume/file structure recording operation,
• wherein an overrun extent is recorded in a volume space, said overrun extent having an unrecorded open integrity information area and close integrity information area allocated for respectively update-recording open integrity information and close integrity information.

A data reproducing method for reproducing data from a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data reproducing method comprising:

• reproducing as a part of the volume/file structure a partition descriptor containing address information for an unallocated space information control block (ICB) for managing unallocated space in a volume space, and
• reproducing a logical volume descriptor containing address information for a root directory ICB for managing a directory structure under the root directory;
• said unallocated space ICB containing address information for a following unallocated space ICB and address information for unallocated space;
• said root directory ICB containing address information for a following root directory ICB and address information for a root directory file;
• and
• said unallocated space ICB and root directory ICB being reproduced from a chaining information area as chaining information that is part of a progressively updated and recorded file structure.

A data reproducing method for reproducing data from a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data reproducing method comprising:

• reproducing a logical volume integrity descriptor from an open integrity information area, said logical volume integrity descriptor containing address information for close integrity information, said close integrity information indicating a close status assuring the integrity of the volume/file structure recorded in the volume space;
• and
• reproducing a logical volume integrity descriptor from a close integrity information area, said logical volume integrity descriptor containing address information for open integrity information, said open integrity information indicating an open status indicative of a start of a volume/file structure recording operation,
• reproducing an unrecorded open integrity information area and close integrity information area allocated for respectively update-recording open integrity information and close integrity information in an overrun extent recorded in a volume space.

A data reproducing apparatus for reproducing data from a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data reproducing apparatus comprising:

• means for reproducing as a part of the volume/file structure a partition descriptor containing address information for an unallocated space information control block (ICB) for managing unallocated space in a volume space, and
• means for reproducing a logical volume descriptor containing address information for a root directory ICB for managing a directory structure under the root directory;
• said unallocated space ICB containing address information for a following unallocated space ICB and address information for unallocated space;
• said root directory ICB containing address information for a following root directory ICB and address information for a root directory file;
• and
• said unallocated space ICB and root directory ICB being reproduced from a chaining information area as chaining information that is part of a progressively updated and recorded file structure.

A data reproducing apparatus for reproducing data from a data storage medium for recording and reproducing files managed using a volume/file structure, the number of data recording operations to any same area of the data storage medium being limited, said data reproducing apparatus comprising:

• means for reproducing a logical volume integrity descriptor from an open integrity information area, said logical volume integrity descriptor containing address information for close integrity information, said close integrity information indicating a close status assuring the integrity of the volume/file structure recorded in the volume space;
• and
• means for reproducing a logical volume integrity descriptor from a close integrity information area, said logical volume integrity descriptor containing address information for open integrity information, said open integrity information indicating an open status indicative of a start of a volume/file structure recording operation,
• means for reproducing an unrecorded open integrity information area and close integrity information area allocated for respectively update-recording open integrity information and close integrity information in an overrun extent recorded in a volume space.