Information recording method, information recording device, and information storage medium

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.

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.

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:

• 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.

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:

• 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.

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.

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:

• 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.

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.

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.

An information storage medium wherein:

• 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.