Information recording method, information recording device, and information storage medium
First Claim
1. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
- defining a file unit as a first unit to record information onto said information storage medium, and further defining a contiguous data area unit to be treated as a continuous recording area as a second unit to decrease the frequency of accessing of said optical head and thereby enable continuous recording onto said information storage medium, doing recording in said contiguous data area units and organizing a collection of the contiguous data area units into said file unit, and providing an information recording place in such a manner that said contiguous data area unit is so set that it extends over the recording area of another file already recorded on said information storage medium and a defective area on said information storage medium.
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Accused Products
Abstract
An information storage medium is designed to assure stable continuous recording without adverse effect, even when many defective areas are present on the information storage medium. To record information onto the information storage medium, a file unit is defined as a first unit. A contiguous data area unit to be treated as a continuous recording area is defined as a second unit. Furthermore, recording is done in the contiguous data area units and a collection of the contiguous data area units is organized into the file unit. In addition, an information recording place is provided in such a manner that the contiguous data area unit is so set that it extends over the recording area of another file already recorded on the information storage medium and a defective area on the information storage medium.
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Citations
23 Claims
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1. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
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defining a file unit as a first unit to record information onto said information storage medium, and further defining a contiguous data area unit to be treated as a continuous recording area as a second unit to decrease the frequency of accessing of said optical head and thereby enable continuous recording onto said information storage medium, doing recording in said contiguous data area units and organizing a collection of the contiguous data area units into said file unit, and providing an information recording place in such a manner that said contiguous data area unit is so set that it extends over the recording area of another file already recorded on said information storage medium and a defective area on said information storage medium. - View Dependent Claims (2, 3)
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4. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the step of:
recording file entry information in a data area on the information storage medium, the file entry information in which identification information about a file to be entered is recorded. - View Dependent Claims (5, 6, 7, 8)
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9. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the step of:
recording file entry information in a data area on the information storage medium, the file entry information in which information indicating an information length equivalent to the recording length of a real-time file is recorded.
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10. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
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after information is recorded onto the information storage medium, searching for an unrecorded area on the information storage medium, creating and allocating position information in extent units serving as continuous recording units in the searched area, and recording information about the position of the empty extent in a management area. - View Dependent Claims (11, 12)
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13. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
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before information recording is done, searching for an unallocated area and a recordable area by reference to management information about the information already recorded on said information storage medium and creating and recording management information that allocates at least a first recording unit to the recordable area. - View Dependent Claims (14)
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15. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
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before information recording is done, searching for an unallocated area and a recordable area by reference to management information about the information already recorded on said information storage medium and setting an empty extent in the recordable area, recording information about said empty extent in a file entry serving as management information, and after real-time data is recorded in said empty extent, rewriting the empty extent information into real-time extent information. - View Dependent Claims (16)
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17. An information recording method which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording method comprising the steps of:
recording information in error correction code block units and, when the end of said recording information extends to the middle of an error correction code block unit, defining that extension as an empty extent, and recording information about the empty extent as management information in the file entry information. - View Dependent Claims (18)
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19. An information recording and reproducing method which uses a first recording process layer for controlling an information recording and reproducing device that records information onto an information storage medium,
a second recording process layer which a file system part that controls a place where information is to be recorded and which controls said first recording process layer, and a third recording process layer existing as an application layer that gives a command to said second recording process layer, and which records or reproduces information onto or from said information storage medium in information recording file units, said information recording and reproducing method comprising the step of: causing said third recording process layer to issue a command to delete only part of said file unit to said second recording process layer.
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20. An information storage medium which uses a head for recording information onto at least an information storage surface, a head moving mechanism for moving said head to the information storage surface, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage surface, said information storage medium characterized by:
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defining a file unit as a first unit to record information onto said information storage surface, and further defining a contiguous data area unit to be treated as a continuous recording area as a second unit to decrease the frequency of accessing of said optical head and thereby enable continuous recording onto said information storage surface, doing recording in said contiguous data area units and organizing a collection of the contiguous data area units into said file unit, and providing an information recording place in such a manner that said contiguous data area unit is so set that it extends over the recording area of another file already recorded on said information storage surface and a defective area on said information storage medium.
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21. An information recording medium which uses a head for recording information onto at least an information storage surface, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage surface, said information recording medium characterized by:
recording file entry information in a data area on the information storage surface, the file entry information in which identification information about a file to be entered has been recorded.
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22. An information recording device which uses a head for recording information onto at least an information storage medium, a head moving mechanism for moving said head to the information storage medium, and a control section for controlling the moving position of said head by controlling said head moving mechanism and records information onto said information storage medium, said information recording device comprising means for,
after information is recorded on the information storage medium, searching for an unrecorded area on the information storage medium, allocating and creating position information in extents serving as continuous recording units in the searched area, and recording information about the position of the empty extent in a management area.
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23. An information storage medium wherein:
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a single file recorded in a data area is composed of one or more extents serving as units in physically continuous recording, said extent including a real-time extent in which real data has been recorded and an empty extent in which no data is recorded, and that an allocation descriptor serving as the information descriptor for said extent included in said data area includes identification information about said real-time extent and that about said empty extent.
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Specification